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        2 Contract API jobs in Mayfair + 20 miles

        Machine Learning Ops Engineer

        Affinity Water Limited
        Hatfield (AL10)
        £60,000 per annum
        Experience with infrastructure-as-code, production-grade Linux environments, and API services (Flask/Gunicorn).
        Experience with infrastructure-as-code, production-grade Linux environments, and API services (Flask/Gunicorn).
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        1 exact match is outside your preferred location

        Position Overview - Job Title Lead Engineer - Location London - Corporate Title Vice President - You will play a key role in the transformation of Rates and Credit Fixed Income technology landscape. As part of our multi-year platform modernisation project, you will be responsible for building a suite of new, real-time, high-performance applications supporting various trading workflows. You will be involved in architecting solutions across the stack, encouraging best practices and working closely with Business stakeholders to build a maintainable, operationally efficient and scalable platform to last the next decade. What well offer you - A healthy, engaged and well-supported workforce are better equipped to do their best work and, more importantly, enjoy their lives inside and outside the workplace. Thats why we are committed to providing an environment with your development and ...
        Position Overview - Job Title Lead Engineer - Location London - Corporate Title Vice President - You will play a key role in the transformation of Rates and Credit Fixed Income technology landscape. As part of our multi-year platform modernisation project, you will be responsible for building a suite of new, real-time, high-performance applications supporting various trading workflows. You will be involved in architecting solutions across the stack, encouraging best practices and working closely with Business stakeholders to build a maintainable, operationally efficient and scalable platform to last the next decade. What well offer you - A healthy, engaged and well-supported workforce are better equipped to do their best work and, more importantly, enjoy their lives inside and outside the workplace. Thats why we are committed to providing an environment with your development and ...
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        C++ Lead / Engineering Manager - Systematic Trading

        McGregor Boyall Associates Limited
        City of London (EC1)
        £150000 - £275000 per annum
        A leading systematic trading environment is looking to hire a hands-on C++ Engineering Manager to work on business-critical trading systems in a live market environment. This role is suited to someone operating at lead or manager level who still enjoys being close to the code. * Lead the design and development of core trading and execution systems in modern C++ * Strong hands-on C++ engineering experience in Linux-based trading environments - Location: London or Amsterdam - Industry: Systematic Trading / Hedge Funds - Work model: Hybrid - The focus is on building and improving low-latency, production trading systems across systematic trading, automated trading, and execution. You will work closely with traders, quants, and engineers to deliver robust technology with direct impact on trading performance. * Build and enhance low-latency infrastructure used across systematic trading and execution
        A leading systematic trading environment is looking to hire a hands-on C++ Engineering Manager to work on business-critical trading systems in a live market environment. This role is suited to someone operating at lead or manager level who still enjoys being close to the code. * Lead the design and development of core trading and execution systems in modern C++ * Strong hands-on C++ engineering experience in Linux-based trading environments - Location: London or Amsterdam - Industry: Systematic Trading / Hedge Funds - Work model: Hybrid - The focus is on building and improving low-latency, production trading systems across systematic trading, automated trading, and execution. You will work closely with traders, quants, and engineers to deliver robust technology with direct impact on trading performance. * Build and enhance low-latency infrastructure used across systematic trading and execution
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        Senior Solutions Engineer

        SCALERS GROUP LIMITED
        The City, City of London (EC2), EC3V
        From £80,000 to £90,000 per annum
        Were looking for a Senior Solution Engineer, ideally with SaaS or Payments background to contribute towards ambitious growth plans across EMEA. * Communicate with C-suite and senior leaders across commercial and tech to support them in building incredible experiences for their customers * Lead technical discovery and solution design for global enterprises with complex requirements. UK, Remote - Scalers HQ is proud to be partnering with an innovative SaaS FinTech & Payments business in the UK. The SaaS platform our client has built takes away a lot of pain points of payment fragmentation. This is an exciting time to join our FinTech partner, and youll join a scaling a team that are rapidly growing. Responsibilities * Writing integration plans and sample code for sellers to assist them in implementing their own personalised integration * Mentor new & junior members
        Were looking for a Senior Solution Engineer, ideally with SaaS or Payments background to contribute towards ambitious growth plans across EMEA. * Communicate with C-suite and senior leaders across commercial and tech to support them in building incredible experiences for their customers * Lead technical discovery and solution design for global enterprises with complex requirements. UK, Remote - Scalers HQ is proud to be partnering with an innovative SaaS FinTech & Payments business in the UK. The SaaS platform our client has built takes away a lot of pain points of payment fragmentation. This is an exciting time to join our FinTech partner, and youll join a scaling a team that are rapidly growing. Responsibilities * Writing integration plans and sample code for sellers to assist them in implementing their own personalised integration * Mentor new & junior members
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        Senior Founding Engineer

        Corecom Consulting
        London
        £80000 - £120000 per annum + equity + package
        Founding Engineer (EnergyTech / AI) Engineers here take ownership of problems end-to-end, from shaping early ideas through to delivering production features used by customers. * Experience as a Full-Stack Engineer building production systems Engineers who thrive here tend to enjoy working close to the problem, communicating clearly across technical and non-technical teams, and taking initiative rather than waiting for direction. London | Hybrid (3 days onsite) | £70k-£120k + Equity - A venture-backed EnergyTech start-up is building a new type of power company designed for the electrified future. As renewable energy adoption accelerates, the challenge is no longer just generating power, but storing, managing, and intelligently dispatching it. This team is developing software that sits at the centre of that transition, enabling a new generation of energy suppliers built around flexibility, storage, and ...
        Founding Engineer (EnergyTech / AI) Engineers here take ownership of problems end-to-end, from shaping early ideas through to delivering production features used by customers. * Experience as a Full-Stack Engineer building production systems Engineers who thrive here tend to enjoy working close to the problem, communicating clearly across technical and non-technical teams, and taking initiative rather than waiting for direction. London | Hybrid (3 days onsite) | £70k-£120k + Equity - A venture-backed EnergyTech start-up is building a new type of power company designed for the electrified future. As renewable energy adoption accelerates, the challenge is no longer just generating power, but storing, managing, and intelligently dispatching it. This team is developing software that sits at the centre of that transition, enabling a new generation of energy suppliers built around flexibility, storage, and ...
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        This is aremote UK-based rolewith occasional meetups in Manchester or London, offering a strong mix ofhands-on engineering (50%) and team leadership (50%), managing a team of 67 engineers. * Leading a distributed engineering team focused on platform reliability and scalability * Partnering with product, security, and engineering teams to shape infrastructure strategy * Strong leadership experience in platform/SRE/cloud engineering teams * Background in software engineering (C#, Java, Python, or Ruby) Were working with a global leader in legal technology thats transforming how law firms operate through cutting-edge AI and cloud platforms. Theyre looking for aManager of Systems Engineeringto lead a high-performing platform team, focused on building and scaling secure, reliable cloud infrastructure in Azure. You will have started your career of as a Software Developer.
        This is aremote UK-based rolewith occasional meetups in Manchester or London, offering a strong mix ofhands-on engineering (50%) and team leadership (50%), managing a team of 67 engineers. * Leading a distributed engineering team focused on platform reliability and scalability * Partnering with product, security, and engineering teams to shape infrastructure strategy * Strong leadership experience in platform/SRE/cloud engineering teams * Background in software engineering (C#, Java, Python, or Ruby) Were working with a global leader in legal technology thats transforming how law firms operate through cutting-edge AI and cloud platforms. Theyre looking for aManager of Systems Engineeringto lead a high-performing platform team, focused on building and scaling secure, reliable cloud infrastructure in Azure. You will have started your career of as a Software Developer.
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        Lead, Software & Platform Engineering We are seeking an experienced Lead Product Engineer to join our team in London. Technical leadership: Guide and mentor the engineering team, making key technical decisions and providing a strategic framework and detailed technical guidance covering architectural patterns, tactical design patterns, best practices, and a clear implementation process. Product development: Lead the technology assessment for new products/features, influencing design decisions to manage risks and develop mitigation plans. Lead AI integration: Work with leadership to implement the company's long-term AI strategy, identifying practical use cases for AI and translating product goals into actionable technical tasks. Lead the design, development, and deployment of AI-enhanced software solutions and oversee the integration of AI capabilities into products and workflows.
        Lead, Software & Platform Engineering We are seeking an experienced Lead Product Engineer to join our team in London. Technical leadership: Guide and mentor the engineering team, making key technical decisions and providing a strategic framework and detailed technical guidance covering architectural patterns, tactical design patterns, best practices, and a clear implementation process. Product development: Lead the technology assessment for new products/features, influencing design decisions to manage risks and develop mitigation plans. Lead AI integration: Work with leadership to implement the company's long-term AI strategy, identifying practical use cases for AI and translating product goals into actionable technical tasks. Lead the design, development, and deployment of AI-enhanced software solutions and oversee the integration of AI capabilities into products and workflows.
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        Configuration Engineer

        EXL Service
        The City, City of London (EC3), EC3N 1DD
        A competitive salary with a generous bonus and additional benefits
        Role Title:Configuration Engineer * 3+ years of experience as a Configuration Engineer or similar role - This role focuses on building and maintaining configuration-driven solutions that power enterprise-grade insurance SaaS platforms. You will translate business and functional requirements into structured JSON and YAML configurations, enabling dynamic forms, workflows and rule engines without heavy custom code. Working closely with business analysts, developers and QA teams, you will ensure that configuration changes are robust, governed and aligned to platform standards. * Configure and manage JSON and YAML-based configurations for forms, rules and workflows * Define dynamic UI forms, field validations and conditional logic using configuration files * Implement and maintain business rules within a configuration-driven platform
        Role Title:Configuration Engineer * 3+ years of experience as a Configuration Engineer or similar role - This role focuses on building and maintaining configuration-driven solutions that power enterprise-grade insurance SaaS platforms. You will translate business and functional requirements into structured JSON and YAML configurations, enabling dynamic forms, workflows and rule engines without heavy custom code. Working closely with business analysts, developers and QA teams, you will ensure that configuration changes are robust, governed and aligned to platform standards. * Configure and manage JSON and YAML-based configurations for forms, rules and workflows * Define dynamic UI forms, field validations and conditional logic using configuration files * Implement and maintain business rules within a configuration-driven platform
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        With a Data Architect now in place, the focus is to recruit a Head of Software Engineering & Platform to lead the software engineering function. This will likely suite a Principal Software Engineer or Tech Lead with Architecture and Build experience looking to formalise their role into a "Head of" This is hands-on technical delivery leading by doing and mentoring so you will still be building full stack C# applications and deploying with DevOps and up skilling the team. You need to have experience of leading end to end software development including design, build, testing, deployment and support. Champion security and reliability by design: integrate compliance, performance, and monitoring into every stage of delivery. 8+ years in software engineering, with deep full-stack and cloud experience. Proven record of leading end to end engineering teams through ...
        With a Data Architect now in place, the focus is to recruit a Head of Software Engineering & Platform to lead the software engineering function. This will likely suite a Principal Software Engineer or Tech Lead with Architecture and Build experience looking to formalise their role into a "Head of" This is hands-on technical delivery leading by doing and mentoring so you will still be building full stack C# applications and deploying with DevOps and up skilling the team. You need to have experience of leading end to end software development including design, build, testing, deployment and support. Champion security and reliability by design: integrate compliance, performance, and monitoring into every stage of delivery. 8+ years in software engineering, with deep full-stack and cloud experience. Proven record of leading end to end engineering teams through ...
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        Business Engineering is looking for impact-focused, engineers ready to drive projects from ideation to implementation and beyond. Our team is at the intersection of business and AI innovation where you will operate similarly to a Forward-Deployed Engineer by solving real-world business challenges with game-changing AI technology that impacts businesses and consumers across the world. We are AI and technology experts that apply our software engineering skills to bring a unique blend of business and technology expertise to ensure our partners succeed. You will get to learn and build on different tech stacks and languages in a rapidly moving, zero-to-one AI domain alongside industry-leading businesses. Our Business Engineering team is at the forefront of the AI frontier - and we're just getting started. * Contribute to building next-gen AI products and improve existing ones in ...
        Business Engineering is looking for impact-focused, engineers ready to drive projects from ideation to implementation and beyond. Our team is at the intersection of business and AI innovation where you will operate similarly to a Forward-Deployed Engineer by solving real-world business challenges with game-changing AI technology that impacts businesses and consumers across the world. We are AI and technology experts that apply our software engineering skills to bring a unique blend of business and technology expertise to ensure our partners succeed. You will get to learn and build on different tech stacks and languages in a rapidly moving, zero-to-one AI domain alongside industry-leading businesses. Our Business Engineering team is at the forefront of the AI frontier - and we're just getting started. * Contribute to building next-gen AI products and improve existing ones in ...
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        This is a fantastic opportunity to join a high-profile programme delivery team, working on a critical automation workstream that ensures creators and rights holders are compensated for their work. In this role, you wont just be building flows; you will be a key technical authority within the Robotic Process Automation (RPA) workstream, responsible for developing robust automations that support the backbone of the music ecosystem. You will work with cutting-edge technology, integrating intelligent automation capabilities (such as Machine Learning, OCR, and NLP) into scalable workflows. * Development:Design, develop, and implement enterprise-grade automations usingPower Automate(cloud flows, desktop flows/RPA, and combined workflows). * Testing & Quality:Lead System Integration Testing (SIT) and User Acceptance Testing (UAT), ensuring automations are robust, ...
        This is a fantastic opportunity to join a high-profile programme delivery team, working on a critical automation workstream that ensures creators and rights holders are compensated for their work. In this role, you wont just be building flows; you will be a key technical authority within the Robotic Process Automation (RPA) workstream, responsible for developing robust automations that support the backbone of the music ecosystem. You will work with cutting-edge technology, integrating intelligent automation capabilities (such as Machine Learning, OCR, and NLP) into scalable workflows. * Development:Design, develop, and implement enterprise-grade automations usingPower Automate(cloud flows, desktop flows/RPA, and combined workflows). * Testing & Quality:Lead System Integration Testing (SIT) and User Acceptance Testing (UAT), ensuring automations are robust, ...
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        As a Director, Performance Engineering, you will lead the charge in protecting and elevating the worlds most established low-latency, high-throughput market data and news distribution system for LSEG. You will build and lead a world-class Performance Engineering function responsible for the performance, capacity, scalability, efficiency, and resiliency of real-time services. * Build and lead the Performance Engineering team for one of the worlds highest-scale, lowest-latency market data systems. * 15+ years of experience in high-scale, real-time engineering environments (preferably financial services, exchanges, trading, or market data). Your team will partner closely with SRE, RT Platform Tools & Automation, Architecture, Product Engineering squads, and Ops Excellence to ensure our RT workloads consistently meet stringent latency, throughput, jitter, and concurrency expectations under all conditions.
        As a Director, Performance Engineering, you will lead the charge in protecting and elevating the worlds most established low-latency, high-throughput market data and news distribution system for LSEG. You will build and lead a world-class Performance Engineering function responsible for the performance, capacity, scalability, efficiency, and resiliency of real-time services. * Build and lead the Performance Engineering team for one of the worlds highest-scale, lowest-latency market data systems. * 15+ years of experience in high-scale, real-time engineering environments (preferably financial services, exchanges, trading, or market data). Your team will partner closely with SRE, RT Platform Tools & Automation, Architecture, Product Engineering squads, and Ops Excellence to ensure our RT workloads consistently meet stringent latency, throughput, jitter, and concurrency expectations under all conditions.
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        The Head of Engineering is responsible for designing, building, and maintaining techUK's core digital systems and engineering capability. Operating within a small engineering team, the Head of Engineering will remain actively involved in development, prototyping, and technical implementation while shaping the organisation's engineering capability and digital architecture. Job Title: Head of Engineering Working closely with teams across the organisation, the Head of Engineering will translate business needs into practical technical solutions and ensure systems are well integrated across the organisation's digital environment. Candidates with experience of: Lead Software Engineer, Systems Developer, Application Developer, HTML, WordPress, Head of Software Engineering, IT Database Developer, Software Integration may also be considered for this role.
        The Head of Engineering is responsible for designing, building, and maintaining techUK's core digital systems and engineering capability. Operating within a small engineering team, the Head of Engineering will remain actively involved in development, prototyping, and technical implementation while shaping the organisation's engineering capability and digital architecture. Job Title: Head of Engineering Working closely with teams across the organisation, the Head of Engineering will translate business needs into practical technical solutions and ensure systems are well integrated across the organisation's digital environment. Candidates with experience of: Lead Software Engineer, Systems Developer, Application Developer, HTML, WordPress, Head of Software Engineering, IT Database Developer, Software Integration may also be considered for this role.
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        PREMIUM
        An established, technology-driven engineering organisation operating in the advanced imaging and detection sector is seeking a highly capable Technical Engineering Manager. The Technical Engineering Manager plays a pivotal role in shaping the impact and long-term strategic growth of by directly influencing technology direction, innovation capability, operational performance, and commercial competitiveness. With continued investment in innovation and product development, this role offers the opportunity to shape technical strategy and engineering excellence at a senior level. * Strong technical background in electronics and analogue system design - You will lead a multidisciplinary engineering function, drive the technology roadmap, and ensure delivery of innovative products aligned to commercial, operational, and customer objectives Engineering Strategy & Leadership
        An established, technology-driven engineering organisation operating in the advanced imaging and detection sector is seeking a highly capable Technical Engineering Manager. The Technical Engineering Manager plays a pivotal role in shaping the impact and long-term strategic growth of by directly influencing technology direction, innovation capability, operational performance, and commercial competitiveness. With continued investment in innovation and product development, this role offers the opportunity to shape technical strategy and engineering excellence at a senior level. * Strong technical background in electronics and analogue system design - You will lead a multidisciplinary engineering function, drive the technology roadmap, and ensure delivery of innovative products aligned to commercial, operational, and customer objectives Engineering Strategy & Leadership
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        Principle Java Engineer

        Profile 29
        South East London (SE1)
        From £65,000 to £75,000 per annum + benefits + hybrid home working
        Theyre looking for an experienced (Principle/Team Lead) Java Engineer to join their implementation team. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage - Youll play a key part in defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery.
        Theyre looking for an experienced (Principle/Team Lead) Java Engineer to join their implementation team. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage - Youll play a key part in defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery.
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        Experience in gathering requirements, documenting business needs and presenting solutions to a senior audience - NICE Actimize is currently seeking a dynamic individual with high energy and drive to join our team as a Presales/Solutions Consultant - This is an incredible opportunity if you're someone who has experience within Financial Crime/Services and you'd like to embark upon a career in Presales. NICE Actimize, the industry's largest and broadest provider of financial crime, anti-money laundering, enterprise fraud and compliance solutions is the leader in Autonomous Financial Crime Management. NICE Actimize AML solutions are acknowledged for technology leadership and expertise in AI, machine learning and intelligent automation. As a Presales engineer, you will; * Position solutions for specific prospect requirements, and articulate how value and business benefits can be achieved
        Experience in gathering requirements, documenting business needs and presenting solutions to a senior audience - NICE Actimize is currently seeking a dynamic individual with high energy and drive to join our team as a Presales/Solutions Consultant - This is an incredible opportunity if you're someone who has experience within Financial Crime/Services and you'd like to embark upon a career in Presales. NICE Actimize, the industry's largest and broadest provider of financial crime, anti-money laundering, enterprise fraud and compliance solutions is the leader in Autonomous Financial Crime Management. NICE Actimize AML solutions are acknowledged for technology leadership and expertise in AI, machine learning and intelligent automation. As a Presales engineer, you will; * Position solutions for specific prospect requirements, and articulate how value and business benefits can be achieved
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        Our client, a fast-scaling, well-funded technology company is looking for a hands-on Technical Team Lead to drive the engineering evolution of a platform used by some of the UK's best-known brands. As the Technical Team Lead, you'll combine 60% hands-on coding with strong technical leadership. This is a rare opportunity to influence the technical strategy for a major platform migration to something new and fantastic, lead a growing engineering team, work with modern technologies, and step into a leadership role with a clear progression path toward CTO as the company scales. * Proven ability to lead engineering teams or mentor developers - If you're excited by building high-quality software at scale, leading talented engineers, and owning major technical decisions this one's for you. You'll guide a team of engineers, shape engineering standards, and work ...
        Our client, a fast-scaling, well-funded technology company is looking for a hands-on Technical Team Lead to drive the engineering evolution of a platform used by some of the UK's best-known brands. As the Technical Team Lead, you'll combine 60% hands-on coding with strong technical leadership. This is a rare opportunity to influence the technical strategy for a major platform migration to something new and fantastic, lead a growing engineering team, work with modern technologies, and step into a leadership role with a clear progression path toward CTO as the company scales. * Proven ability to lead engineering teams or mentor developers - If you're excited by building high-quality software at scale, leading talented engineers, and owning major technical decisions this one's for you. You'll guide a team of engineers, shape engineering standards, and work ...
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        The successful candidate for the Engineer, Post Trade role, will be working with the Director Technical Delivery Solution and Delivery, will form part of a team building a complex, ground-up cloud-based critical market infrastructure service in a bold new venture for LSEG. Role Profile - This opening requires a candidate who takes great pride in delivering excellence with excellent logical and technical skills and a can-do attitude combined with a helpful mentality, and a wish to play a critical role in forming and growing a new business. Key Responsibilities - A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry standards.
        The successful candidate for the Engineer, Post Trade role, will be working with the Director Technical Delivery Solution and Delivery, will form part of a team building a complex, ground-up cloud-based critical market infrastructure service in a bold new venture for LSEG. Role Profile - This opening requires a candidate who takes great pride in delivering excellence with excellent logical and technical skills and a can-do attitude combined with a helpful mentality, and a wish to play a critical role in forming and growing a new business. Key Responsibilities - A strong focus on engineering excellence and coding, adopting an open and hands-on approach to problem-solving and delivery. Engage deeply in technical design and implementation to ensure solutions are robust, scalable, and aligned with industry standards.
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        Frequently Asked Questions

        How many contract API jobs are there in Mayfair?
        There are 2 contract API jobs within 20 miles of Mayfair available on JustEngineers right now.

        What other similar jobs are there to contract API jobs in Mayfair?
        As well as contract API jobs in Mayfair, you can find contract Engineering, Management, Quality and Safety, amongst many others.