1 to 25 of 126 API Design Jobs in London

join a Business Banking Technology team within a leading Tier 1 financial institution. You'll play a key role in enhancing and scaling their digital banking platform. Key Responsibilities Design, build, and maintain robust, scalable applications using Java, Spring Boot, and Angular or React. Collaborate with cross-functional teams to deliver seamless end-to-end features, from user interfaces … Messaging: PostgreSQL, Oracle, MongoDB (optional) Kafka, Redis (for messaging and caching) Requirements Extensive experience in full-stack development with strong expertise in Java and Angular. Solid understanding of REST API design, microservices architecture, and cloud-native development. Hands-on experience with CI/CD pipelines, containerization, and infrastructure as code. Strong grasp of Agile methodologies and collaborative team More ❯

own the strategic architectural direction and implementation, ensuring our platform is scalable, secure, and aligned with the rapidly evolving AI landscape. Key Responsibilities Provide visionary architectural leadership for the design, development, and delivery of a new generation AI-driven SaaS platform. Lead, mentor, and manage a team of Senior Full-Stack Developers and engineers, fostering a culture of technical … Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong understanding and practical application of … experience integrating AI tools, APIs, or platforms into software solutions. Domain experience in Recruitment Technology, HRTech, or closely related fields is a must. Proficient in software architecture, microservices, RESTful API design, and cloud-native development (AWS, Azure, or GCP preferred). Experience with CI/CD pipelines, automated testing, and DevOps practices. Solid grasp of security best practices More ❯

own the strategic architectural direction and implementation, ensuring our platform is scalable, secure, and aligned with the rapidly evolving AI landscape. Key Responsibilities Provide visionary architectural leadership for the design, development, and delivery of a new generation AI-driven SaaS platform. Lead, mentor, and manage a team of Senior Full-Stack Developers and engineers, fostering a culture of technical … Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong understanding and practical application of … experience integrating AI tools, APIs, or platforms into software solutions. Domain experience in Recruitment Technology, HRTech, or closely related fields is a must. Proficient in software architecture, microservices, RESTful API design, and cloud-native development (AWS, Azure, or GCP preferred). Experience with CI/CD pipelines, automated testing, and DevOps practices. Solid grasp of security best practices More ❯

AI Agents Solution Architect - Future Talent (Q2/Q3 opportunities) for leading GSI in the software engineering market AI Solution Architect to design and implement AI-driven agent solutions for the online commerce space. Deep understanding of AI/ML models, cloud computing, and scalable system architecture. This role requires expertise in architecting intelligent agents, optimizing cloud-based deployments … and integrating AI services into enterprise applications. Key Responsibilities: Architect and design AI-powered agent solutions that integrate with enterprise systems and cloud platforms. Develop and optimize RESTful and GraphQL APIs to facilitate AI-driven interactions. Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. Implement Full Stack JavaScript (Node.js, React.js … Work closely with data scientists and ML engineers to integrate machine learning models into cloud-native applications. Ensure security, scalability, and reliability of AI agent solutions in production environments. Design event-driven and serverless architectures to enhance AI agent performance. Lead proof-of-concept (PoC) developments for AI-based automation and intelligent process optimization. Define best practices for AI More ❯

that support financial services and products. You should be able to write clean, scalable, and secure code and be comfortable working in a fastpaced, highly collaborative environment. Key Responsibilities: Design, develop, and maintain scalable web applications using Python and Django Build and optimise backend services, APIs, and database schemas for performance and scalability Work closely with product, design … expertise in Django framework Solid experience with SQL and/or PostgreSQL, including performance tuning and complex queries Prior experience in the FinTech industry is required Familiarity with RESTful API design and integration Understanding of data privacy, security standards, and regulatory compliance relevant to FinTech Experience with version control systems like Git Good communication skills and ability to More ❯

that support financial services and products. You should be able to write clean, scalable, and secure code and be comfortable working in a fastpaced, highly collaborative environment. Key Responsibilities: Design, develop, and maintain scalable web applications using Python and Django Build and optimise backend services, APIs, and database schemas for performance and scalability Work closely with product, design … expertise in Django framework Solid experience with SQL and/or PostgreSQL, including performance tuning and complex queries Prior experience in the FinTech industry is required Familiarity with RESTful API design and integration Understanding of data privacy, security standards, and regulatory compliance relevant to FinTech Experience with version control systems like Git Good communication skills and ability to More ❯

grade blockchain applications, primarily for the financial and regulated industries. The ideal candidate should possess a passion for decentralized systems, secure coding practices, and scalable backend services. Key Responsibilities: Design, develop, and deploy blockchain-based solutions using R3 Corda for high-impact use cases. Build and maintain backend services using Python and Node.js, following microservices architecture. Develop and integrate … smart contract logic and flows within the Corda framework. Collaborate with architects, DevOps, and product teams to translate requirements into scalable solutions. Design APIs, data models, and services ensuring high performance, scalability, and security. Conduct code reviews, write unit and integration tests, and follow CI/CD best practices. Stay up to date with emerging trends and technologies in … blockchain and backend ecosystems. Participate in technical design discussions and contribute to architectural decisions. Required Skills & Qualifications: 3+ years of professional experience in blockchain development, with a strong focus on R3 Corda. Proficient in Python and Node.js for backend development. Strong knowledge of microservices architecture and RESTful API design. Experience with Corda Flows, States, Contracts, and integration patterns. More ❯

grade blockchain applications, primarily for the financial and regulated industries. The ideal candidate should possess a passion for decentralized systems, secure coding practices, and scalable backend services. Key Responsibilities: Design, develop, and deploy blockchain-based solutions using R3 Corda for high-impact use cases. Build and maintain backend services using Python and Node.js, following microservices architecture. Develop and integrate … smart contract logic and flows within the Corda framework. Collaborate with architects, DevOps, and product teams to translate requirements into scalable solutions. Design APIs, data models, and services ensuring high performance, scalability, and security. Conduct code reviews, write unit and integration tests, and follow CI/CD best practices. Stay up to date with emerging trends and technologies in … blockchain and backend ecosystems. Participate in technical design discussions and contribute to architectural decisions. Required Skills & Qualifications: 3+ years of professional experience in blockchain development, with a strong focus on R3 Corda. Proficient in Python and Node.js for backend development. Strong knowledge of microservices architecture and RESTful API design. Experience with Corda Flows, States, Contracts, and integration patterns. More ❯

D&A systems and the wider technology architecture. 1. Data & Analytics (D&A) Infrastructure Management: Develop, maintain, and optimize the D&A architecture on AWS and Azure, including the design, deployment, and maintenance of the cloud based Pladis' data platform (PDP). Deliver an architecture that's globally scalable, agile, and supportive of digital services through Data and Insights … as a service via APIs. 2. Data Technology Capability Enhancement: Design and oversee the implementation of the PDP 2.0 Tech stack. Design and oversee data architecture to harmonise external, internal and Microsoft Graph data to deliver AI use cases Champion engineering standards and ensure new engineers' quick integration and productivity. Lead engineering problem solving and provide technical guidance … with latest AI and ML trends to keep the company at the technological forefront. Lay down AI architectural standards, best practices, and guidelines for system design. 5. AI Solutions Design and Integration: Design AI solutions that are robust, scalable, and in line with business requirements. Integrate generalized AI models into business processes and ensure they harmonize with existing More ❯

with containerisation (Docker/Kubernetes). Support implementation of authentication systems (OAuth 2.0, Auth0, AWS Cognito). Gain exposure to security best practices (e.g., OWASP). Work on RESTful API design and consumption. Collaborate on version control practices using Git, documentation, and code reviews. Desired Skills: Passion for software development and continuous learning. Some frontend experience with JavaScript … Python or Node.js. Understanding of databases (relational and NoSQL). Familiarity with cloud platforms (AWS/Azure) is a plus. Exposure to Docker/Kubernetes is advantageous. Understanding of API integration and security fundamentals. Experience or interest in OCR and NLP is beneficial. Knowledge of version control (e.g., Git). Education & Experience: Degree in computer science, software engineering, or More ❯

with containerisation (Docker/Kubernetes). Support implementation of authentication systems (OAuth 2.0, Auth0, AWS Cognito). Gain exposure to security best practices (e.g., OWASP). Work on RESTful API design and consumption. Collaborate on version control practices using Git, documentation, and code reviews. Desired Skills: Passion for software development and continuous learning. Some frontend experience with JavaScript … Python or Node.js. Understanding of databases (relational and NoSQL). Familiarity with cloud platforms (AWS/Azure) is a plus. Exposure to Docker/Kubernetes is advantageous. Understanding of API integration and security fundamentals. Experience or interest in OCR and NLP is beneficial. Knowledge of version control (e.g., Git). Education & Experience: Degree in computer science, software engineering, or More ❯

ready to grow with us Location: Soho, London (onsite 4 days a week) Salary: Based on experience Must hold right to work in the UK. Main responsibilities Development and Design: Write clean, efficient, and maintainable code using TypeScript, JavaScript, Node.js, and React. Design and implement robust applications and services to meet predefined requirements. Code Review and Quality Assurance … Experience with modern development tools and practices, such as Git, CI/CD pipelines, automated testing frameworks (e.g., Jest, Mocha), and containerisation technologies (e.g., Docker). Knowledge of RESTful API design and development, and familiarity with web services architecture. Ability to write efficient, secure, well-documented, and clean JavaScript code. Familiarity with database technologies, both SQL (e.g., PostgreSQL More ❯

AWS, Azure, GCP) Proficiency in front end e.g., React, Angular, Vue.js and frameworks such as e.g., Node.js or FastAPI. Experience with databases such as MongoDB and MySQL. Familiarity with API design and development, including serverless technologies, e.g. AWS ECS/API Gateway/Lambda. A passion for space technology and a genuine interest in the space sector More ❯

within our trading workflows focused on legal and compliance. Responsibilities Lead and manage a team of developers and business analysts, providing guidance and support to ensure successful project delivery Design, implement, and monitor mission-critical real-time applications integrated into trading workflows, specifically focused on legal and compliance Oversee several applications that evaluate trading constraints related to Material Non … and CI/CD with a focus on latency and performance Lead modernization efforts for legacy systems. Participate in tech-wide initiatives to review resiliency and sustainability, ensuring that design and architecture can respond and recover quickly. Conduct regular code reviews, write unit tests, and maintain comprehensive technical documentation for systems, processes, and architecture. Requirements 10+ years of software … server-side technologies, including Spring Boot Proficient in writing maintainable code in multiple languages such as HTML, Java, and JavaScript/TypeScript, with a solid understanding of data structures, design patterns, and algorithms Experience with public cloud technologies, as well as a passion for automation and familiarity with CI/CD tools like GitLab Strong practitioner of DevOps practices More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

forward digital transformation in the industry. In this role, you will work closely with subject matter experts, product owners, technical leads, designers, and fellow architects to re-architect and design innovative solutions aligned with both business and technology strategies. A deep understanding of energy trading and risk management processes across front, middle, and back-office functions—particularly within physical … trading—is essential. Your Responsibilities: Design and document the architecture of bespoke, modern energy trading systems. Lead functional and technical requirement gathering, analysis, and architectural design. Serve as a thought leader and advisor throughout delivery and design reviews. Communicate effectively across stakeholders, business functions, vendors, and consulting teams. Manage business change and stakeholder expectations with clarity and confidence. … reporting, MongoDB, data migration, reconciliation. Technical Architecture – Hands-on with C#/Java, microservices, containerization (Docker, OpenShift, Kubernetes), React, AWS, Terraform. Integration – Expertise in real-time messaging (e.g., AMQ), API design (JSON, Swagger), and batch processes. Infrastructure & Operations – DevOps practices, CI/CD pipelines, Git, Ansible, cloud elasticity, cost optimization, and grid computing. Delivery Approach: Deep familiarity with More ❯

forward digital transformation in the industry. In this role, you will work closely with subject matter experts, product owners, technical leads, designers, and fellow architects to re-architect and design innovative solutions aligned with both business and technology strategies. A deep understanding of energy trading and risk management processes across front, middle, and back-office functions—particularly within physical … trading—is essential. Your Responsibilities: Design and document the architecture of bespoke, modern energy trading systems. Lead functional and technical requirement gathering, analysis, and architectural design. Serve as a thought leader and advisor throughout delivery and design reviews. Communicate effectively across stakeholders, business functions, vendors, and consulting teams. Manage business change and stakeholder expectations with clarity and confidence. … reporting, MongoDB, data migration, reconciliation. Technical Architecture – Hands-on with C#/Java, microservices, containerization (Docker, OpenShift, Kubernetes), React, AWS, Terraform. Integration – Expertise in real-time messaging (e.g., AMQ), API design (JSON, Swagger), and batch processes. Infrastructure & Operations – DevOps practices, CI/CD pipelines, Git, Ansible, cloud elasticity, cost optimization, and grid computing. Delivery Approach: Deep familiarity with More ❯

sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with immediate scrum team, other scrum/… Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to take initial design direction and interpret those guidelines to finalise the design through to a solution Restful API Design and development fundamentals Good SQL knowledge Test case preparation and execution EDUCATION & EXPERIENCE REQUIREMENTS 8-10 years' experience designing and developing applications both individually and as part of a team Familiarity with energy or financial trading environment Strong inter-personal More ❯

chances of a successful application to this job by ensuring your CV and skills are a good match. As a Software Engineer you play an important role in the design and development of our modern private cloud MySQL offerings. You will bring your past experience to a talented group to further evolve the technical capabilities of our organization, drive … s technically feasible and what is desired by the end user. Implement solutions with an equal focus on both functional and non-functional requirements Understand/apply reusable code design, leverage application architecture/framework capabilities and functionality, and design/develop solutions that are highly reliable, scalable, and perform to meet business-defined service levels. Conduct code … reviews and ensure quality solutions are built and tested. Employ Agile practices; Pair Programming; Continuous Integration; Test Driven Development, etc. Contribute to the technical code and design documentation. Conduct solid analysis and problem solving to provide production support and L3 cover Required qualifications, capabilities, and skills Very strong experience in Python Strong knowledge of security and authentication (e.g. OIDC More ❯

Role : Mulesoft Architect Location : London Work Mode : Hybrid Contract Role Job Description: We are looking for a seasoned Solution Architect with strong hands-on experience in MuleSoft and API design/development . The ideal candidate will play a pivotal role in designing scalable and secure integration solutions across enterprise systems. Experience with MongoDB and other NoSQL databases … is highly desirable. Key Responsibilities: Lead the architecture, design, and implementation of integration solutions using MuleSoft Anypoint Platform. Collaborate with business and technical stakeholders to define API-led connectivity strategies. Design and document integration patterns, data flows, and API specifications (RAML/OAS). Provide hands-on development support for complex MuleSoft flows, DataWeave transformations, and … API policies. Oversee the full API lifecycle - from design to deployment and monitoring. Integrate MuleSoft with MongoDB and other back-end systems where applicable. Define best practices for security, performance, and scalability of integration solutions. Mentor development teams and provide technical leadership across projects. Required Skills & Experience: 8+ years of experience in integration architecture with at least More ❯

databases and distributed queue systems Guide development of our Nuxt (Vue 3) frontend with TypeScript and modern CSS frameworks Manage our React Native mobile app development and cross-platform API integration Ensure seamless integration between frontend, backend, and AI orchestration layers Cloud Infrastructure & DevOps: Lead our serverless and containerised deployment strategies across cloud providers Architect scalable compute solutions for … both web applications and AI workloads Manage multi-database architecture across relational and document stores Design fault-tolerant systems with automatic scaling and recovery capabilities Oversee CI/CD pipelines and comprehensive monitoring across all services Technical Leadership: Build and lead a team across full-stack development and AI engineering Establish best practices for cloud-native, multi-technology development … solutions Understanding of vector databases, embedding systems, and retrieval architectures Technical Expertise: Full-stack development across modern web technologies Containerisation (Docker) and orchestration platforms (Kubernetes, ECS, or equivalent) Database design across SQL and NoSQL systems API design, microservices architecture, and distributed systems Cloud infrastructure management and infrastructure-as-code AI/ML model deployment, monitoring, and scaling More ❯

eager to take on a lot of responsibility, and are passionate about producing reliable software solutions. Responsibilities Plan and execute technical strategies from concept to deployment, shaping software architecture, design, and best practices. Work with designers, PMs, and engineers to build, test, and refine desktop and enterprise-level software. Engage in all SDLC phases—design, development, testing, deployment … cloud platforms like AWS. Proficient in agile methods like sprints, pair programming, and test-driven development. Adaptable, thrives in fast-paced environments, and quickly learns new technologies. SQL, RESTful API design, and modern front-end frameworks (React/Angular) experience is a plus. More ❯

eager to take on a lot of responsibility, and are passionate about producing reliable software solutions. Responsibilities Plan and execute technical strategies from concept to deployment, shaping software architecture, design, and best practices. Work with designers, PMs, and engineers to build, test, and refine desktop and enterprise-level software. Engage in all SDLC phases—design, development, testing, deployment … cloud platforms like AWS. Proficient in agile methods like sprints, pair programming, and test-driven development. Adaptable, thrives in fast-paced environments, and quickly learns new technologies. SQL, RESTful API design, and modern front-end frameworks (React/Angular) experience is a plus. More ❯

focusing on iterative value delivery, fast feedback loops, and continuous improvement. Contribute to backlog grooming, technical scoping, and story writing with product managers. Participate in code reviews, retrospectives, and design sessions, contributing to a strong engineering culture. Security, Quality, and Operations Ensure that all solutions meet firmwide standards for security, privacy, and compliance. Take ownership of the health of … Proficiency in modern programming languages and frameworks (e.g. JavaScript/TypeScript, Python, .NET, Node.js). Experience with frontend development (e.g. React, Angular, Hugo). Strong understanding of backend systems, API design, and system integration. Comfortable working with cloud platforms such as Microsoft Azure or AWS. Familiarity with databases (SQL/NoSQL), identity/access management, and deployment tools. … cross-functional team. Experience working in a professional service, legal, or regulated environment is a plus, but not required. Experience collaborating with product teams and participating in user-focused design and delivery. Ways of Working Practical understanding of agile, DevOps, and CI/CD practices. Passion for writing maintainable, testable code and improving developer workflows. Ability to balance speed More ❯

it all right here at Sky. Sky is looking to hire a hands-on Senior Java Developer to join our UK&I Technology team. In this role you will design, build, deploy software that is used at the forefront of the television broadcasting industry, that reaches millions of customers worldwide. Serve as a technical role model, leading innovative and … stakeholders, and senior executives. A strong track record of leading technical initiatives that result in measurable impacts and change. Good understanding of Agile frameworks, foundational architectural and engineering concepts, API designs and agile best practices. Ability to quickly prototype and demonstrate concepts, showcasing the practical application of your ideas Team overview EMS (Experience Management System) is a development team More ❯