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        24 API jobs in Leedon + 20 miles

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        Senior Engineer Java

        IG Group Ltd
        London
        Competitive
        This role is part of our Digital Platform Services team, who are responsible for delivering central services to the divisions in an API first way by utilising AI to pioneer of AI-first development practices. * Design and implement scalable microservices with API-first mindset API-First & Microservices Excellence * Create comprehensive API documentation and developer guides API-First & Microservices Architecture * Deep knowledge of API design principles and RESTful/GraphQL patterns * Understanding of service mesh, API gateways, and inter-service communication * API design and documentation tools (Swagger/OpenAPI, Postman)
        This role is part of our Digital Platform Services team, who are responsible for delivering central services to the divisions in an API first way by utilising AI to pioneer of AI-first development practices. * Design and implement scalable microservices with API-first mindset API-First & Microservices Excellence * Create comprehensive API documentation and developer guides API-First & Microservices Architecture * Deep knowledge of API design principles and RESTful/GraphQL patterns * Understanding of service mesh, API gateways, and inter-service communication * API design and documentation tools (Swagger/OpenAPI, Postman)
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        Our API design concepts. * Our current technology stack is AWS Serverless products ( Lambda , SQS , EventBridge , API Gateway , S3, ECS ) running Typescript (and Node.js) on the compute layer and backed by MongoDB for the database layer.
        Our API design concepts. * Our current technology stack is AWS Serverless products ( Lambda , SQS , EventBridge , API Gateway , S3, ECS ) running Typescript (and Node.js) on the compute layer and backed by MongoDB for the database layer.
        more
        From day one, youll be hands-onsupporting our clients (banks and wealth managers), guiding them through API integration for their apps and websites, and helping set up data connections and custom reports.
        From day one, youll be hands-onsupporting our clients (banks and wealth managers), guiding them through API integration for their apps and websites, and helping set up data connections and custom reports.
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        Develop Intelligent Applications: Engage in the full development lifecycle to build internal tools and agents using custom logic and direct API integrations. * Full-Stack Contribution: Contribute to backend logic (API integrations, database management) and simple user-facing interfaces to make your tools accessible to non-technical colleagues. * Strong Scripting Skills (Python or JavaScript): You have strong hands-on experience using Python or JavaScript/TypeScript for data manipulation, API interaction, and process automation. * LLM & API Experience: You have built applications or scripts that utilize LLM APIs (OpenAI, Anthropic, Gemini).
        Develop Intelligent Applications: Engage in the full development lifecycle to build internal tools and agents using custom logic and direct API integrations. * Full-Stack Contribution: Contribute to backend logic (API integrations, database management) and simple user-facing interfaces to make your tools accessible to non-technical colleagues. * Strong Scripting Skills (Python or JavaScript): You have strong hands-on experience using Python or JavaScript/TypeScript for data manipulation, API interaction, and process automation. * LLM & API Experience: You have built applications or scripts that utilize LLM APIs (OpenAI, Anthropic, Gemini).
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        NEW
        Back-End Development Support: Contribute to server-side functionality using PHP, including API integrations, data processing, and business logic implementation, with guidance from your manager. Ability to read, modify, and write PHP code for server-side logic, data processing, and API integrations.
        Back-End Development Support: Contribute to server-side functionality using PHP, including API integrations, data processing, and business logic implementation, with guidance from your manager. Ability to read, modify, and write PHP code for server-side logic, data processing, and API integrations.
        more
        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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        Job Description Summary - Sr Staff Technical Product Manager- D&S- Avionics & Power Next Generation MES/QMS - Responsible for operating in lock-step with product management teams to create a clear strategic direction for development needs and conveys that vision to the build and/or operations team. You will direct the team with a clear and descriptive set of requirements and partner with the team to determine what can be delivered through balancing the need for new features, defects, and technical debt. Your priority is seamless integration and alignment of perspectives from a broad set of stakeholders: Product Managers, Technical Anchors, Product Owners and Developers. Job Description - Roles and Responsibilities * Demonstrate superior product and industry knowledge and helps organization to gain the competitive edge.
        Job Description Summary - Sr Staff Technical Product Manager- D&S- Avionics & Power Next Generation MES/QMS - Responsible for operating in lock-step with product management teams to create a clear strategic direction for development needs and conveys that vision to the build and/or operations team. You will direct the team with a clear and descriptive set of requirements and partner with the team to determine what can be delivered through balancing the need for new features, defects, and technical debt. Your priority is seamless integration and alignment of perspectives from a broad set of stakeholders: Product Managers, Technical Anchors, Product Owners and Developers. Job Description - Roles and Responsibilities * Demonstrate superior product and industry knowledge and helps organization to gain the competitive edge.
        more
        Who are we? Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballers legs. Kis mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days. Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years. Kis teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons. Where you come in?
        Who are we? Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballers legs. Kis mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days. Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years. Kis teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons. Where you come in?
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        nCino offers exciting career opportunities for individuals who want to join the worldwide leader in cloud banking. As a PreSales Solution Architect you will use your SaaS & Salesforce expertise and work closely with banks and financial institutions to innovate financial services. You will lead the solutioning for business challenges and present and demonstrate the value of the nCino solution. Responsibilities * Be a Trusted Advisor to prospects and clients by leading presales conversations, * presentations and solutioning around nCino-specific architectural design * Be a Thought Leader and provide guidance as it relates to SaaS, cloud infrastructure and AI, especially in relation to financial services * Be a Solution Consultant and lead deep-dive discovery sessions with prospects to identify target solution architecture and advise on best practices to meet functional
        nCino offers exciting career opportunities for individuals who want to join the worldwide leader in cloud banking. As a PreSales Solution Architect you will use your SaaS & Salesforce expertise and work closely with banks and financial institutions to innovate financial services. You will lead the solutioning for business challenges and present and demonstrate the value of the nCino solution. Responsibilities * Be a Trusted Advisor to prospects and clients by leading presales conversations, * presentations and solutioning around nCino-specific architectural design * Be a Thought Leader and provide guidance as it relates to SaaS, cloud infrastructure and AI, especially in relation to financial services * Be a Solution Consultant and lead deep-dive discovery sessions with prospects to identify target solution architecture and advise on best practices to meet functional
        more
        The opportunity - We have an exciting opportunity for a Backend Staff Engineer who wants to be at the forefront of the AI revolution to help shape the future of the Engineering strategy - taking the team to the next level. Youll help to set the direction of backend engineering, be a key person in our AI capability development by navigating everything from decision making to implementation, whilst expertly supporting engineers to balance quality, rapid delivery and value with complexity. Salary - The salary range for this role is £100K to £125K. In person and remote working balance - We embrace a flexible hybrid work model. While we don't mandate specific office days, we ask Attesters to work on-site 2 days per week. This approach allows us to collaborate in person, while ensuring enough time remotely for deep, focussed work. What youll be doing
        The opportunity - We have an exciting opportunity for a Backend Staff Engineer who wants to be at the forefront of the AI revolution to help shape the future of the Engineering strategy - taking the team to the next level. Youll help to set the direction of backend engineering, be a key person in our AI capability development by navigating everything from decision making to implementation, whilst expertly supporting engineers to balance quality, rapid delivery and value with complexity. Salary - The salary range for this role is £100K to £125K. In person and remote working balance - We embrace a flexible hybrid work model. While we don't mandate specific office days, we ask Attesters to work on-site 2 days per week. This approach allows us to collaborate in person, while ensuring enough time remotely for deep, focussed work. What youll be doing
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        Our engineering team is dedicated to designing and developing robust backend services and applications that support Macquaries Commodities and Global Markets operations. We work collaboratively across functions to deliver reliable, high-performance solutions, ensuring our systems remain responsive, efficient, and scalable. Our focus is on maintaining code quality, fostering innovation, and continuously improving our technology landscape. While Macquarie offers hybrid working for many of our roles, this role does require 3 days a week in the advertised location. At Macquarie, our advantage is bringing together diverse people and empowering them to shape all kinds of possibilities. We are a global financial services group operating in 31 markets and with 56 years of unbroken profitability. Youll be part of a friendly and supportive team where everyone - no matter what r
        Our engineering team is dedicated to designing and developing robust backend services and applications that support Macquaries Commodities and Global Markets operations. We work collaboratively across functions to deliver reliable, high-performance solutions, ensuring our systems remain responsive, efficient, and scalable. Our focus is on maintaining code quality, fostering innovation, and continuously improving our technology landscape. While Macquarie offers hybrid working for many of our roles, this role does require 3 days a week in the advertised location. At Macquarie, our advantage is bringing together diverse people and empowering them to shape all kinds of possibilities. We are a global financial services group operating in 31 markets and with 56 years of unbroken profitability. Youll be part of a friendly and supportive team where everyone - no matter what r
        more
        Bicycle Therapeutics is a clinical-stage pharmaceutical company developing a novel class of medicines, referred to as Bicycle molecules, for diseases that are underserved by existing therapeutics. Bicycle molecules are fully synthetic short peptides constrained with small molecule scaffolds to form two loops that stabilize their structural geometry. This constraint facilitates target binding with high affinity and selectivity, making Bicycle molecules attractive candidates for drug development. The company is evaluating zelenectide pevedotin (formerly BT8009), a Bicycle Drug Conjugate (BDC) targeting Nectin-4, a well-validated tumor antigen; BT5528, a BDC molecule targeting EphA2, a historically undruggable target; and BT7480, a Bicycle Tumor-Targeted Immune Cell Agonist (Bicycle TICA) targeting Nectin-4 and agonizing CD137, in company-sponsored clinical trials.
        Bicycle Therapeutics is a clinical-stage pharmaceutical company developing a novel class of medicines, referred to as Bicycle molecules, for diseases that are underserved by existing therapeutics. Bicycle molecules are fully synthetic short peptides constrained with small molecule scaffolds to form two loops that stabilize their structural geometry. This constraint facilitates target binding with high affinity and selectivity, making Bicycle molecules attractive candidates for drug development. The company is evaluating zelenectide pevedotin (formerly BT8009), a Bicycle Drug Conjugate (BDC) targeting Nectin-4, a well-validated tumor antigen; BT5528, a BDC molecule targeting EphA2, a historically undruggable target; and BT7480, a Bicycle Tumor-Targeted Immune Cell Agonist (Bicycle TICA) targeting Nectin-4 and agonizing CD137, in company-sponsored clinical trials.
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        Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every employee is hard. And so is managing office space in a hybrid world. And so is improving the customer and guest experience. We exist to make each of these things easier. We exist to bring harmony to our customers. And we do that at enterprise scale. Our omnichannel employee communications, customer communications, and workplace experience platform is trusted by over 6,000 organizations today, reaching more than 35M employees and delivering content to 500,000+ digital signs. We know there's no such thing as a "perfect" candidate - we're all a work in progress and are growing new skil
        Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every employee is hard. And so is managing office space in a hybrid world. And so is improving the customer and guest experience. We exist to make each of these things easier. We exist to bring harmony to our customers. And we do that at enterprise scale. Our omnichannel employee communications, customer communications, and workplace experience platform is trusted by over 6,000 organizations today, reaching more than 35M employees and delivering content to 500,000+ digital signs. We know there's no such thing as a "perfect" candidate - we're all a work in progress and are growing new skil
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        Castleton Commodities International ( is a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, engineering the high-performance data, systems and innovative tools that power our commercial decision-making. We build platforms and forecasts that help our front-office teams understand market behavior, forecast price movements, and manage risk. Our team solves complex, high-impact challenges using a modern technology stack, including the latest in GenAI and the latest technologies. We develop everything in cloud-native infrastructure from structured data and real-time analytics to back testing engines, third party integrations, and internal libraries, all designed to give CCI a competitive edge in global commodities markets.
        Castleton Commodities International ( is a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, engineering the high-performance data, systems and innovative tools that power our commercial decision-making. We build platforms and forecasts that help our front-office teams understand market behavior, forecast price movements, and manage risk. Our team solves complex, high-impact challenges using a modern technology stack, including the latest in GenAI and the latest technologies. We develop everything in cloud-native infrastructure from structured data and real-time analytics to back testing engines, third party integrations, and internal libraries, all designed to give CCI a competitive edge in global commodities markets.
        more
        Since being founded in 2018, Copper has been building the standard for institutional digital asset infrastructure with a focus on custody, collateral management, and prime services. Led by Amar Kuchinad, Copper's Global CEO, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart of Copper's offering is Multi-Party Computation (MPC) technology the gold standard in secure custody. Coppers multi-award winning custody system is unique in that it can be connected to centralised exchanges, DeFi applications and even staking pools without the assets leaving the custody. Built on top of this state-of-the-art custody, ClearLoop is the first solution in the market that overcomes a growing industry challenge; counterparty risk wi
        Since being founded in 2018, Copper has been building the standard for institutional digital asset infrastructure with a focus on custody, collateral management, and prime services. Led by Amar Kuchinad, Copper's Global CEO, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart of Copper's offering is Multi-Party Computation (MPC) technology the gold standard in secure custody. Coppers multi-award winning custody system is unique in that it can be connected to centralised exchanges, DeFi applications and even staking pools without the assets leaving the custody. Built on top of this state-of-the-art custody, ClearLoop is the first solution in the market that overcomes a growing industry challenge; counterparty risk wi
        more
        As a Lead/Senior Solution Engineer (f/m/d)* at Parloa, you play a central role in helping customers understand the real value of our conversational AI platform. Youll guide prospects and customers through their technical journey with us - shaping solutions, validating feasibility, and ensuring each engagement is grounded in business impact. Working in close partnership with Sales, youll run discovery, design architectures, lead technical evaluations, and support a seamless path from first conversation to successful project. * Be responsible for the full spectrum of the technical sales process, from identifying customer pain to proving solutions. * Work closely with assigned sellers, co-owning accounts, and sales campaigns in the assigned territory. * Develop territory plans, participate in sales calls, lead technical deep dives, and conduct Proof of Value / Proof of .
        As a Lead/Senior Solution Engineer (f/m/d)* at Parloa, you play a central role in helping customers understand the real value of our conversational AI platform. Youll guide prospects and customers through their technical journey with us - shaping solutions, validating feasibility, and ensuring each engagement is grounded in business impact. Working in close partnership with Sales, youll run discovery, design architectures, lead technical evaluations, and support a seamless path from first conversation to successful project. * Be responsible for the full spectrum of the technical sales process, from identifying customer pain to proving solutions. * Work closely with assigned sellers, co-owning accounts, and sales campaigns in the assigned territory. * Develop territory plans, participate in sales calls, lead technical deep dives, and conduct Proof of Value / Proof of .
        more
        Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. About You - You are a Senior product / UX designer who works at the intersection of AI-assisted UX, monetization, communication desig
        Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. About You - You are a Senior product / UX designer who works at the intersection of AI-assisted UX, monetization, communication desig
        more
        Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Senior Software Engineer at FX Digital, you take a leading role in shaping the technical direction of our Connected TV and living room experiences. With your extensive experience in application development and web technologies, you will lead technical solutions, mentor team members, and deliver engaging user experiences for large screen devices. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experiences for mobile and large screen devices * Lead technical solutions for Connected TV, mobile and interactivity across smart devices
        Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Senior Software Engineer at FX Digital, you take a leading role in shaping the technical direction of our Connected TV and living room experiences. With your extensive experience in application development and web technologies, you will lead technical solutions, mentor team members, and deliver engaging user experiences for large screen devices. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experiences for mobile and large screen devices * Lead technical solutions for Connected TV, mobile and interactivity across smart devices
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        Frequently Asked Questions

        How many API jobs are there in Leedon?
        There are 24 API jobs within 20 miles of Leedon available on CWJobs right now.

        Where in Leedon are these jobs?
        You can find jobs in The City, City (EC4), Hinxton, Southwark.

        What other similar jobs are there to API jobs in Leedon?
        As well as API jobs in Leedon, you can find Quality Assurance, IT, Software Development, amongst many others.