1 to 25 of 151 Permanent API Development Jobs in London

Data Platform Developer to support a major transformation programme. The role focuses on designing, building and supporting secure, cloud-native data integration and API solutions on Azure, including data ingestion and transformation with Azure Databricks, API development using Azure Functions (Python), and API governance through Azure … API Management (APIM). Working closely with architects, product owners and engineering teams, you will deliver scalable, secure and maintainable solutions while supporting the transition from legacy integrations to Azure‐managed dataflows. Strong SQL and Python skills are essential, with experience of PHP, Java, PL/ ...

backend services, APIs, and integrations that support millions of customer payment journeys every year. Own features end-to-end, taking responsibility for solution design, development, testing, deployment, and production support. Help shape the technical direction of the Payments platform, balancing performance, scalability, resilience, security, and cost through modern engineering … quality, testing, and maintainability. Proficient in driving operational excellence through observability and modern engineering practices. Highest-signal resume keywords Java Engineering Expertise Backend Service Development API Design and Integration CI/CD Implementation Observability and Monitoring Hard Skills Backend Development API Development System Design Scalable ...

.NET Developer – London - £500-550 per day (.NET, C#, SQL, AWS, API Development) We’re working with an industry leading e-commerce site that are looking for several .NET Developers to join them for an initial 6-month projects as part of an ongoing transformation. These roles will … hosted solutions. Working alongside existing engineering teams that already own the services and understand the business logic. Technical requirements C# .NET/.NET Core API development SQL .NET upgrade programmes Cloud-native migrations Interview slots are available for next week. (.NET, C#, SQL, AWS, API Development ...

Tech: ASP.NET MVC 5, Restful API, Angular, SQL, Azure Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known fintech50 business, 10 man flat Dev Team Pay: 75k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingLead ASP.NET MVC Developer FintechQuant is urgently … looking for a Lead ASP.NET MVC Developer to join our high profile client.Current challenges include cloud migration, greenfield trading platform development, and bank based API creation.Our client is well known in the WRAP and SIPP market as a full service provider.The environment is that of Facebook or Google ...

technology stack and wants exposure to enterprise-scale systems used by clients across multiple international markets. You will be involved in the full software development lifecycle, contributing to the development, maintenance, enhancement, and support of business-critical applications. The Role You will work closely with senior developers, technical … business stakeholders to deliver robust software solutions across a range of internal and client-facing platforms. The role offers a strong mix of: Backend development API development Database work Application support Technical improvements Collaboration across the wider business This is a hands-on development role suited ...

high-performance authentication and identity services used by millions of customers and colleagues. Own features end-to-end, taking responsibility for solution design, development, testing, deployment, monitoring, and production support. Help shape the technical direction of the Identity Platform, balancing customer experience, security, performance, and developer usability. Develop resilient … significant experience building and operating large-scale distributed systems serving millions of users. Strong experience with Java and/or Kotlin and modern backend development frameworks. in designing and delivering secure, scalable services within cloud-native environments. Strong understanding of DevOps principles, CI/CD pipelines, automation, and operational ...

Build and deploy prototypes, automations and production-ready features, integrating with internal Zencargo services, carrier platforms and third-party APIs. Use AI and modern development tools both to accelerate delivery and as a core part of the solutions you build. Work with structured and unstructured data, including emails, documents … Experience building and consuming APIs, webhooks and system integrations. Experience working with databases, data models and event-driven workflows. Fluent use of AI-assisted development tools as a core part of how you build. This is essential to the role. Strong product judgement: understands unfamiliar business processes quickly, embeds ...

technical leadership for the design, build, productionisation and ongoing operation of secure Django-based applications and supporting infrastructure. The role will establish the development processes, coding standards, API standards, security approach, RBAC model and application architecture needed for repeatable delivery. The developer will bring extensive experience in productionising … securing Django applications, embedding automated testing, CI/CD and agile development practices, and creating documentation to support Technical Design Authority (TDA), security assurance and operational handover. Responsibilities: · Lead the architecture, development and deployment of secure Django applications and associated infrastructure in Azure. · Define and embed Django development ...

Tech: C# .Net, ASP.NET, WPF, MySQL Challenge: Greenfield High Data Throughput platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 10 man flat Dev Team Pay: 80k, Bonus- training budget, Pension, Life/Health, Some Flex Working Development Team Lead Fintech Quant … Lead Developer will• Manage the Dev. team including recruitment • Build and deliver business requirements • Collaborate with Product Owner on defining development requirements and schedule • Become enlightened on the system architectureThe environment is that of Facebook or Google, relaxed open with time to think and make the right decisions. ...

About the OpportunityWe are looking for an Engineering Manager to lead a high-performing, remote-first API development team based in Europe who are driving Contentful’s REST and GraphQL APIs that enable customers to manage and deliver content at scale. The role will focus on continuously evolving … driven capabilities. We aim to help customers accelerate innovation, reduce operational complexity, and unlock new growth opportunities through a secure, performant, and extensible API ecosystem.You’ll partner closely with cross-functional teams to ensure alignment between technical goals and business objectives, driving scalable, high-performance APIs that power Contentful ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

that underpin our critical banking services.MAIN PURPOSE OF THE ROLE This is a hands‐on engineering role at the intersection of cloud platforms, software development, and AI enablement. You will design, develop, and support bespoke cloud and AI solutions across Azure, Oracle Cloud, and later AWS, applying strong engineering …/models, and applying AI services to real-world use cases.Strong knowledge of IAM, security patterns, governance, and compliance requirements.Preferred ExperienceExperience with Azure API Management or similar API gateways.Exposure to AI governance, model lifecycle controls, or responsible AI implementation in regulated environments.Knowledge of Foundry, vectorisation patterns ...

design, and software delivery across complex enterprise environments. Proven ability to lead architecture decisions from concept through implementation and operational adoption. Demonstrated experience designing API‐led, integration‐focused, and event‐driven solutions. Strong technical leadership with the ability to guide, mentor, and influence multidisciplinary teams. Experience managing … integration approaches. Experience within the Insurance sector, particularly Commercial Insurance or the London Market, is advantageous. Good‐to‐Have Skills AWS services including Lambda, API Gateway, SQS, SNS, and DynamoDB. Node.js and TypeScript development experience. Java and Spring Boot development experience. PostgreSQL and data persistence technologies. Apigee ...

sector to design and build technology solutions that make a genuine difference to users. We’re looking for an Azure Application Developer with strong API development experience to join our engineering team. You’ll work on complex client engagements, building secure, scalable and production ready solutions within Microsoft … design and build cloud native applications and APIs. This is a hands on role where you’ll take solutions from requirements and design through development, testing and into production. What You’ll Do Design, develop and maintain applications and RESTful APIs within Azure Build cloud native services using Azure ...

recruit a Senior Solutions Architect to be based at the Company's Central London Offices. You will extensive and deep Expertise in following Application Development areas: " Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka, etc. … Deep knowledge of Microservices, Containers, REST APIs development, API Management tools (e.g. MuleSoft, Apigee), Kafka " Solution architect with broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc. " Application dev experience with at least ...

Software Engineer, you will play a key role in designing, developing and enhancing business-critical applications and services.Working across backend and full-stack development, you'll help deliver secure, scalable solutions while collaborating with a talented team focused on solving complex technical challenges.What You'll Be Doing* Designing … solution design and technical architecture decisions* Developing and extending internal tools and platforms* Collaborating with engineering teams across software, networking and infrastructureAbout YouBackend Development* Commercial experience developing applications in Go (Golang)* Strong REST API development experience* PostgreSQL database experience* Knowledge of ORM frameworks, ideally GORM* Understanding ...

Architect with some Pre-Sales experience to be based at the Company’s Central London Offices.You will extensive and deep Expertise in following Application Development areas:Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka, etc.Deep … knowledge of Microservices, Containers, REST APIs development, API Management tools (e.g. MuleSoft, Apigee), KafkaSolution architect with broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc.Application dev experience with at least ...

recruit a Senior Solutions Architect to based at the Company’s Central London Offices. You will extensive and deep Expertise in following Application Development areas: Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka, etc. Deep … knowledge of Microservices, Containers, REST APIs development, API Management tools (e.g. MuleSoft, Apigee), Kafka Solution architect with broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc. Application dev experience with at least ...

about building reusable backend capabilities that enable multiple teams and products. Strong understanding of distributed systems, event-driven architectures, and asynchronous messaging patterns. Designed API-first platforms with GraphQL and REST-based services. Comfortable working with high-volume transactional systems where reliability, performance, and resilience are critical. Core Competencies … driven architectures. Proficient in Java and Kotlin, with a solid understanding of distributed systems and high-volume transactional environments. Highest-signal resume keywords Java Development Kotlin Development Microservices Architecture GraphQL API Design Event-Driven Architecture ATS Optimization Keywords Hard Skills Backend Engineering API Development Distributed ...

Lead Developer/Team Lead – FintechTech: C# .net, Azure, SQL, Team City, GIT, TFSChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Insurtech software business, West London, 10 man flat Dev TeamPay: 65k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingQuant is urgently … looking for a Lead Developer/Development Manager to join our high profile client.Current challenges include cloud migration, greenfield trading platform development, and bank based API creation.Our client is a well known fintech software house in the City.Day to Day the Lead Developer/Development Managers ...

Lead Developer/Team Lead – FintechTech: C# .net, Azure, SQL, Team City, GIT, TFSChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Insurtech software business, West London, 10 man flat Dev TeamPay: 65k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingQuant is urgently … looking for a Lead Developer/Development Manager to join our high profile client.Current challenges include cloud migration, greenfield trading platform development, and bank based API creation.Our client is a well known fintech software house in the City.Day to Day the Lead Developer/Development Managers ...

Role Summary :We are seeking a Java API Developer to join our Digital Asset development team. This is a hands-on software engineering role responsible for designing, developing, testing, and supporting RESTful APIs and backend services in a financial services environment. The role contributes to building reliable, secure … maintain Java-based backend services and REST APIs that support financial services workflows and data use cases.Implement APIs in line with internal requirements for API design, security, versioning, and documentation, ensuring solutions are consistent and reusable.Collaborate with business and technology stakeholders to understand requirements, clarify edge cases, and deliver ...

reliable and performant backend systems Develop low-level control and dispatch systems for power management Provide platform functionality through the web application and public API Design, build and maintain backend services Contribute to technical leadership, mentorship and team best practices Balance long-term strategy with short-term needs … changing industry Participate in an on-call rotation and take end-to-end ownership of technical operations Requirements Experience with Go and cloud-native development, including AWS, microservices and CI/CD Strong problem-solving skills Ability to work autonomously in a collaborative environment Knowledge of database technologies Knowledge ...

mobile applications that support an evolving digital strategy. The Role As a Digital Application Developer, you'll be involved in the full software development lifecycle, working closely with product, design and engineering teams to deliver secure, scalable and user-focused digital solutions. You'll contribute to the development … Skills & Experience We're interested in speaking with candidates who have experience in some of the following areas: React, TypeScript and modern JavaScript development Mobile application development using iOS and/or Android technologies API development and systems integration Software design principles and application architecture ...

this role is to contribute to application systems analysis and programming activities, ensuring the delivery of high-quality and robust software solutions. Responsibilities: Application Development: Design, code, and debug Java applications. Contribute to the entire software development lifecycle, from conception and design to testing and deployment. Technical Contribution … Java, adjacent technologies, and software engineering principles to help solve problems and troubleshoot issues. AI Integration: Actively explore and utilize modern AI-powered development tools and technologies to enhance productivity and code quality. Experience with AI development assistants and agents is desirable. Collaboration & Communication: Clearly communicate technical concepts ...