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        12 Permanent API jobs in Middlesex + 20 miles

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        Rust Engineer - Platform Trading

        Keyrock
        London
        Competitive
        Job title: Rust Engineer - Platform - About Keyrock - Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation. Today, we rock with over 200 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, Singapore and Paris, and host regular online and offline hangouts to keep the crew tight. We are trading on more than 80 exchanges, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks as well as digital asset management.
        Job title: Rust Engineer - Platform - About Keyrock - Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation. Today, we rock with over 200 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, Singapore and Paris, and host regular online and offline hangouts to keep the crew tight. We are trading on more than 80 exchanges, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks as well as digital asset management.
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        Join Proton and build a better internet where privacy is the default - At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech's invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information.
        Join Proton and build a better internet where privacy is the default - At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech's invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information.
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        We are looking for a rare hybrid talent someone who can hack together end-to-end prototypes at speed while also standing confidently in front of a customer's executive team. This role sits at the intersection of engineering, product, and business development . You will be one of the first technical faces customers meet, building semi-deployable prototypes, testing product-market fit in the wild, and representing us in high-stakes conversations with senior stakeholders. If you're an entrepreneurial engineer who thrives in ambiguity, loves building quickly, and wants to see the immediate impact of your work with customers, this role is for you. * Rapidly design, build, and deliver end-to-end prototypes, demos, and proofs-of-concept that help prospects and partners experience the art of the possible.
        We are looking for a rare hybrid talent someone who can hack together end-to-end prototypes at speed while also standing confidently in front of a customer's executive team. This role sits at the intersection of engineering, product, and business development . You will be one of the first technical faces customers meet, building semi-deployable prototypes, testing product-market fit in the wild, and representing us in high-stakes conversations with senior stakeholders. If you're an entrepreneurial engineer who thrives in ambiguity, loves building quickly, and wants to see the immediate impact of your work with customers, this role is for you. * Rapidly design, build, and deliver end-to-end prototypes, demos, and proofs-of-concept that help prospects and partners experience the art of the possible.
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        About Us - Moneybox is growing rapidly. We have more users, more accounts, more money invested, more features, more code, more data, and more team members than ever before. We are looking for an Engineering Lead to help us handle this growth without compromising on our service or product quality. This role is part of the backend engineering leadership team. We are looking for an experienced hands-on engineer who has contributed to and managed the delivery of complex software across multiple teams. Our Tech Stack - o - Backend: C# / .NET Core / .NET Framework (being phased out) o Patterns REST APIs, Hangfire, MediatR, Entity Framework, Mass Transit, xUnit - o Azure App Services, Functions, Service Bus, Event Hub, CosmosDB, SQL Server, Data Factory - o Tooling GitHub, Azure DevOps, Terraform, Datadog, Rollbar - What You'll Do
        About Us - Moneybox is growing rapidly. We have more users, more accounts, more money invested, more features, more code, more data, and more team members than ever before. We are looking for an Engineering Lead to help us handle this growth without compromising on our service or product quality. This role is part of the backend engineering leadership team. We are looking for an experienced hands-on engineer who has contributed to and managed the delivery of complex software across multiple teams. Our Tech Stack - o - Backend: C# / .NET Core / .NET Framework (being phased out) o Patterns REST APIs, Hangfire, MediatR, Entity Framework, Mass Transit, xUnit - o Azure App Services, Functions, Service Bus, Event Hub, CosmosDB, SQL Server, Data Factory - o Tooling GitHub, Azure DevOps, Terraform, Datadog, Rollbar - What You'll Do
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        Description - techUK Overview: techUK is the trade association which brings together people, companies and organisations to realise the positive outcomes of what digital technology can achieve. With over 1100 members (the majority of which are SMEs) across the UK, techUK creates a network for innovation and collaboration across business, government and stakeholders to provide a better future for people, society, the economy and the planet. By providing expertise and insight, we support our members, partners and stakeholders as they prepare the UK for what comes next in a constantly changing world. Were looking for a Digital Systems Engineer to design, build, and continuously improve the internal digital tools that support our members and staff. Working as part of our Digital Team, youll take a hands-on role in developing and maintaining our CRM, digital product stack and ...
        Description - techUK Overview: techUK is the trade association which brings together people, companies and organisations to realise the positive outcomes of what digital technology can achieve. With over 1100 members (the majority of which are SMEs) across the UK, techUK creates a network for innovation and collaboration across business, government and stakeholders to provide a better future for people, society, the economy and the planet. By providing expertise and insight, we support our members, partners and stakeholders as they prepare the UK for what comes next in a constantly changing world. Were looking for a Digital Systems Engineer to design, build, and continuously improve the internal digital tools that support our members and staff. Working as part of our Digital Team, youll take a hands-on role in developing and maintaining our CRM, digital product stack and ...
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        GBR - London, Canada Square - Full time - 2026-03-02 - Posted Today - R0055094 - Join us at Wolters Kluwer and be part of a dynamic global technology company that makes a difference every day. We're innovators with impact. We provide expert software and information solutions that the world's leading professionals rely on, in the moments that matter most. As part of this mission, we're looking for a driven and experienced Principal Software Engineer (DevSecOps) to act as the technical authority for automated delivery, security, and platform reliability across our product engineering organization. This role is responsible for designing, building, and evolving highly automated CI/CD pipelines and secure software delivery platforms that enable teams to ship frequently, safely, and at scale. You will operate as a hands-on technical leader, shaping DevSecOps strategy through code, automation, ...
        GBR - London, Canada Square - Full time - 2026-03-02 - Posted Today - R0055094 - Join us at Wolters Kluwer and be part of a dynamic global technology company that makes a difference every day. We're innovators with impact. We provide expert software and information solutions that the world's leading professionals rely on, in the moments that matter most. As part of this mission, we're looking for a driven and experienced Principal Software Engineer (DevSecOps) to act as the technical authority for automated delivery, security, and platform reliability across our product engineering organization. This role is responsible for designing, building, and evolving highly automated CI/CD pipelines and secure software delivery platforms that enable teams to ship frequently, safely, and at scale. You will operate as a hands-on technical leader, shaping DevSecOps strategy through code, automation, ...
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        About Staffbase - We inspire people to achieve great things together. Our mission is to help organizations unlock the power of inspirational communication with the first AI-native Employee Experience Platform . Our industry-leading and award-winning agentic AI communications channels - intranet, employee app and email solutions - create engaging experiences that connect and empower employees. Headquartered in Chemnitz, Germany and New York City, with offices in Berlin, London, Sydney, Tokyo, Prague, and MinneapolisSt. Paul, our diverse team of 750+ employees supports 2,000+ customersreaching over 16.4 million employeesin transforming their employee experience. We are proud to be a Unicorn companyprivately valued at over $1 billiondemonstrating strong growth, innovation, and lasting impact in our industry. Together, we're shaping the future of workplace communication.
        About Staffbase - We inspire people to achieve great things together. Our mission is to help organizations unlock the power of inspirational communication with the first AI-native Employee Experience Platform . Our industry-leading and award-winning agentic AI communications channels - intranet, employee app and email solutions - create engaging experiences that connect and empower employees. Headquartered in Chemnitz, Germany and New York City, with offices in Berlin, London, Sydney, Tokyo, Prague, and MinneapolisSt. Paul, our diverse team of 750+ employees supports 2,000+ customersreaching over 16.4 million employeesin transforming their employee experience. We are proud to be a Unicorn companyprivately valued at over $1 billiondemonstrating strong growth, innovation, and lasting impact in our industry. Together, we're shaping the future of workplace communication.
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        Who we are - Samsara (NYSE: IOT) is the pioneer of the Connected Operations Cloud, which is a platform that enables organizations that depend on physical operations to harness Internet of Things (IoT) data to develop actionable insights and improve their operations. At Samsara, we are helping improve the safety, efficiency and sustainability of the physical operations that power our global economy. Representing more than 40% of global GDP, these industries are the infrastructure of our planet, including agriculture, construction, field services, transportation, and manufacturing and we are excited to help digitally transform their operations at scale. Working at Samsara means you'll help define the future of physical operations and be on a team that's shaping an exciting array of product solutions, including Video-Based Safety, Vehicle Telematics, Apps and Driver ...
        Who we are - Samsara (NYSE: IOT) is the pioneer of the Connected Operations Cloud, which is a platform that enables organizations that depend on physical operations to harness Internet of Things (IoT) data to develop actionable insights and improve their operations. At Samsara, we are helping improve the safety, efficiency and sustainability of the physical operations that power our global economy. Representing more than 40% of global GDP, these industries are the infrastructure of our planet, including agriculture, construction, field services, transportation, and manufacturing and we are excited to help digitally transform their operations at scale. Working at Samsara means you'll help define the future of physical operations and be on a team that's shaping an exciting array of product solutions, including Video-Based Safety, Vehicle Telematics, Apps and Driver ...
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        As the Senior Director of Platform Engineering, you will oversee everything from providing rock-solid infrastructure to shared services, and from building a great internal developer experience through to setting the standards around our API and quality programs.
        As the Senior Director of Platform Engineering, you will oversee everything from providing rock-solid infrastructure to shared services, and from building a great internal developer experience through to setting the standards around our API and quality programs.
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        Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? As the Investment API category leader in Europe, we are continuing our path of growth and expansion - with our API product at its core. * Proven experience in a regulated fintech, finance, or banking environment, preferably B2B, with a deep understanding of API-first SaaS offerings. * Continuous learning : The complex yet fascinating field of investments, building an API product on a state-of-the-art tech stack, and working with the most relevant fintechs and financial institutions provide for an incredibly rewarding learning experience.
        Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? As the Investment API category leader in Europe, we are continuing our path of growth and expansion - with our API product at its core. * Proven experience in a regulated fintech, finance, or banking environment, preferably B2B, with a deep understanding of API-first SaaS offerings. * Continuous learning : The complex yet fascinating field of investments, building an API product on a state-of-the-art tech stack, and working with the most relevant fintechs and financial institutions provide for an incredibly rewarding learning experience.
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        Post-training techniques for planning, reasoning & complex workflows (e.g., reasoning models, LLMs + knowledge graphs, test time compute, CoT pipelines, tool use & API calling, etc.)
        Post-training techniques for planning, reasoning & complex workflows (e.g., reasoning models, LLMs + knowledge graphs, test time compute, CoT pipelines, tool use & API calling, etc.)
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        At Ping Identity, we believe in making digital experiences both secure and seamless for all users, without compromise. We call this digital freedom. And it's not just something we provide our customers. It's something that inspires our company. People don't come here to join a culture that's built on digital freedom. They come to cultivate it. Our intelligent, cloud identity platform lets people shop, work, bank, and interact wherever and however they want. Without friction. Without fear. While protecting digital identities is at the core of our technology, protecting individual identities is at the core of our culture. We champion every identity. One of our core values, Respect Individuality, reminds us to celebrate differences so you are empowered to bring your authentic self to work. We're headquartered in Denver, Colorado and we have offices and employees around the globe.
        At Ping Identity, we believe in making digital experiences both secure and seamless for all users, without compromise. We call this digital freedom. And it's not just something we provide our customers. It's something that inspires our company. People don't come here to join a culture that's built on digital freedom. They come to cultivate it. Our intelligent, cloud identity platform lets people shop, work, bank, and interact wherever and however they want. Without friction. Without fear. While protecting digital identities is at the core of our technology, protecting individual identities is at the core of our culture. We champion every identity. One of our core values, Respect Individuality, reminds us to celebrate differences so you are empowered to bring your authentic self to work. We're headquartered in Denver, Colorado and we have offices and employees around the globe.
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        Are you passionate about graphics, computers, and solving problems around computers trying to do graphics? Do you look at designs thinking 'What happens if I do ...?'. Does creatively breaking modern GPUs in as many ways as possibly sound like fun? Look no further! The GPU teamin Arm has the mission to be at the forefront of advanced multimedia IP products. As team member, your role will have a meaningful impact in verifying next-generation graphics processors. If you have a high level of technical proficiency and an ability to pick up and apply new concepts and skills quickly, we want to hear from you. You will work within a team of engineers with a diverse set of skills from both hardware and software backgrounds. The team is exposed to a wide range of tools, languages & methodologies as part of their work.
        Are you passionate about graphics, computers, and solving problems around computers trying to do graphics? Do you look at designs thinking 'What happens if I do ...?'. Does creatively breaking modern GPUs in as many ways as possibly sound like fun? Look no further! The GPU teamin Arm has the mission to be at the forefront of advanced multimedia IP products. As team member, your role will have a meaningful impact in verifying next-generation graphics processors. If you have a high level of technical proficiency and an ability to pick up and apply new concepts and skills quickly, we want to hear from you. You will work within a team of engineers with a diverse set of skills from both hardware and software backgrounds. The team is exposed to a wide range of tools, languages & methodologies as part of their work.
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        IAM Senior Engineer

        BRITISH UNITED PROVIDENT ASSOCIATION LIMITED(THE)
        South East
        78200
        Staines - Full time - 2026-03-16 - Posted Today - R1216187 - London or Staines - Permanent - From: £78.2k DOE + 10% bonus + fantastic benefits - Full time: 37.5 hours per week, including weekend/ out of hours rota** We consider all types of flexibility, including locations, hours and working patterns. At Bupa, we're passionate about technology. With colleagues, customers, patients and residents in mind you'll have the opportunity to work on innovative projects and make a real impact on their lives. Right from the start you'll become part of our digital strategy, joining us on our journey and developing yourself along the way. As Identity and Access Management (IAM) Senior Engineer you will be working across Bupa Global, India and UK Market Unit. You will be responsible for the end-to-end of IAM design, development, testing, implementation, integration and maintenance of IAM systems and solutions ...
        Staines - Full time - 2026-03-16 - Posted Today - R1216187 - London or Staines - Permanent - From: £78.2k DOE + 10% bonus + fantastic benefits - Full time: 37.5 hours per week, including weekend/ out of hours rota** We consider all types of flexibility, including locations, hours and working patterns. At Bupa, we're passionate about technology. With colleagues, customers, patients and residents in mind you'll have the opportunity to work on innovative projects and make a real impact on their lives. Right from the start you'll become part of our digital strategy, joining us on our journey and developing yourself along the way. As Identity and Access Management (IAM) Senior Engineer you will be working across Bupa Global, India and UK Market Unit. You will be responsible for the end-to-end of IAM design, development, testing, implementation, integration and maintenance of IAM systems and solutions ...
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        Apply now - Date: 13 Mar 2026 - Location: London region, GB - 81357 - Power System & Product Development Engineer - This Power System & Product Development Engineer will report to the Network Access Manager and will work within DSO directorate based in our London office. You will be a permanent employee. You will attract a salary of £80,574.00 and a bonus of 3%. This role can also offer blended working after probationary period (6 months) - 3 days in the office and 2 remote - Close Date: 26/03/2026 - We also provide the following additional benefits * 25 Days Annual Leave plus bank holidays. * Reservist Leave - Additional 18 days full pay and 22 unpaid * Personal Pension Plan - Personal contribution rates of 4% or 5% (UK Power Networks will make a corresponding contribution of 8% or 10%) * Tenancy Loan Deposit Scheme, Season Ticket Loan
        Apply now - Date: 13 Mar 2026 - Location: London region, GB - 81357 - Power System & Product Development Engineer - This Power System & Product Development Engineer will report to the Network Access Manager and will work within DSO directorate based in our London office. You will be a permanent employee. You will attract a salary of £80,574.00 and a bonus of 3%. This role can also offer blended working after probationary period (6 months) - 3 days in the office and 2 remote - Close Date: 26/03/2026 - We also provide the following additional benefits * 25 Days Annual Leave plus bank holidays. * Reservist Leave - Additional 18 days full pay and 22 unpaid * Personal Pension Plan - Personal contribution rates of 4% or 5% (UK Power Networks will make a corresponding contribution of 8% or 10%) * Tenancy Loan Deposit Scheme, Season Ticket Loan
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        IAM Lead Engineer

        BRITISH UNITED PROVIDENT ASSOCIATION LIMITED(THE)
        South East
        Competitive
        Staines - Full time - 2026-03-13 - Posted Today - R1215795 - Identity and Access Management Lead Engineer - Competitive Salary + Benefits - Location: London / Staines / Salford Quays / Flexible - Permanent - Fulltime - We make health happen - At Bupa, we're here to help people live longer, healthier, happier lives. With no shareholders, we reinvest our profits into improving the health of our customers and the quality of the services we provide. As our IAM Lead Engineer, you will play a vital role in strengthening our security posture by leading the design, development and operation of identity and access management technologies across Bupa Global, India and UK (BGIUK). Key Responsibilities * Lead the design, configuration, integration and support of Identity Governance & Administration (IGA), Privileged Access Management (PAM) and Electronic Identity Management (EIM) tools.
        Staines - Full time - 2026-03-13 - Posted Today - R1215795 - Identity and Access Management Lead Engineer - Competitive Salary + Benefits - Location: London / Staines / Salford Quays / Flexible - Permanent - Fulltime - We make health happen - At Bupa, we're here to help people live longer, healthier, happier lives. With no shareholders, we reinvest our profits into improving the health of our customers and the quality of the services we provide. As our IAM Lead Engineer, you will play a vital role in strengthening our security posture by leading the design, development and operation of identity and access management technologies across Bupa Global, India and UK (BGIUK). Key Responsibilities * Lead the design, configuration, integration and support of Identity Governance & Administration (IGA), Privileged Access Management (PAM) and Electronic Identity Management (EIM) tools.
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        Frequently Asked Questions

        How many permanent API jobs are there in Middlesex?
        There are 12 permanent API jobs within 20 miles of Middlesex available on JustEngineers right now.

        What other similar jobs are there to permanent API jobs in Middlesex?
        As well as permanent API jobs in Middlesex, you can find permanent Engineering, Management, Software Development, amongst many others.