1 to 25 of 177 API Design Jobs

Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

possess a combination of some of the following skills, then LETS TALK! Experience in Java development Backend cloud-based application development Understanding of API design for mobile applications with event-driven architecture Strong analysis and problem-solving skills Preferred - Experience of building distributed scalable microservices using Java/… Kotlin, Spring Boot, OAuth 2.0, Secure API design A working understanding of technologies/areas: AWS, API Design, Automation testing In return, you will be rewarded with a highly competitive benefits package including a bonus and ongoing career development and training. What you need ...

API Developer Sheffield, UK (3 days WFO weekly) Rate is GBP 450/day(Inside Ir35) Role Summary We are looking for a highly skilled Application Developer with strong expertise in identity API development, data ingestion and transformation, and event-driven (Pub/Sub) architectures. This role focuses … APIs, Pub/Sub pipelines, and cloud-native applications. You will collaborate closely with tech leads, Cloud Security, DevOps, and Application Engineering teams to design and implement robust IAM automation, identity life cycle workflows, and secure service integrations that support enterprise-level cloud and Identity operations. Key Responsibilities Identity ...

measurable outcomes (OKRs/KPIs). Drive discovery activities (user research, hypothesis framing, spikes, proofs-of-concept) and validate solutions through iterative experimentation. Requirements & Design Convert business and technical needs into well-formed epics, features, and user stories with clear acceptance criteria. Apply UX principles to define intuitive workflows … interfaces; produce wireframes and low-fi mockups to align teams quickly. Collaborate with architects on solution design: API contracts, data models, event flows , and non-functional requirements (security, performance, scalability). Agile Delivery & Backlog Ownership Act as Product Owner for one or more Agile squads, owning the product ...

looking for a highly skilled Application Developer with strong expertise in identity API development, data ingestion and transformation, and event-driven (Pub/Sub) architectures . This role focuses on building secure, scalable identity and access workflows across Google Cloud Platform, integrating identity services with custom APIs, Pub/… pipelines, and cloud-native applications. You will collaborate closely with tech leads, Cloud Security, DevOps, and Application Engineering teams to design and implement robust IAM automation, identity lifecycle workflows, and secure service integrations that support enterprise-level cloud and Identity operations. Key Responsibilities Identity Orchestration Design and implement ...

cloud-native platforms supporting mobile applications in a regulated environment. This is a hands-on backend role focused on Java/Kotlin microservices, secure API design, and cloud delivery. You will contribute across the full SDLC while influencing engineering standards, best practices, and technical quality. Key Responsibilities Design … continuous improvement initiatives Required Skills & Experience Strong backend development experience with Java and/or Kotlin Spring Boot, REST APIs, microservices architecture Secure API design, OAuth, authentication/authorisation AWS or cloud platform experience Event-driven systems and distributed architectures Experience working in financial services or regulated environments ...

shaping Meteor's digital future. Key Responsibilities Lead, mentor, and inspire a team of developers, fostering a culture of technical excellence and continuous improvement Design, develop, and maintain high-quality software solutions across the full stack Architect and implement systems using .NET, JavaScript, SQL, and modern frontend frameworks Oversee … API design and integrations, ensuring secure and efficient data exchange Translate business and stakeholder requirements into clear technical solutions Conduct code reviews and ensure adherence to coding, security, and quality standards Drive continuous improvement in development workflows, testing, and deployment practices Support the professional development of team members ...

Days in Office The Role Dev Sec Ops Engineer Role Overview We are seeking a highly skilled Senior Data Platform & Integration Engineer to design, develop, and optimize enterprise data solutions. The ideal candidate will have deep expertise in modern data platforms, integration technologies, and advanced analytics, including AI/… ML. Key Responsibilities Data Platform Management Design and implement solutions using Microsoft Fabric, Snowflake, CosmoDB, Databricks, MongoDB, and traditional RDBMS systems Data Replication & CDC Configure and manage Qlik Replicate and Oracle GoldenGate for real-time data synchronization Data Modeling Develop conceptual, logical, and physical models using ERStudio Integration & Messaging ...

platform Ship production to code and have end to end ownership of your work Working on complex challenges such as financial transaction analysis and API design Play a Key role in shaping their engineering culture as they continue to grow their team What they need: A product minded … Backend weighted but having some exposure to Frontend technologies would be beneficial) Ideally experience in or an interest in FinTech. Good experience with API design and databases (they are using PostgreSQL) Key Details: Salary £60k-£80k depending on experience London based (Hoxton), 4 days onsite Benefits include ...

platform Ship production to code and have end to end ownership of your work Working on complex challenges such as financial transaction analysis and API design Play a Key role in shaping their engineering culture as they continue to grow their team What they need: A product minded … Backend weighted but having some exposure to Frontend technologies would be beneficial) Ideally experience in or an interest in FinTech. Good experience with API design and databases (they are using PostgreSQL) Key Details: Salary £60k-£80k depending on experience London based (Hoxton), 4 days onsite Benefits include ...

Solution Architect | 6 Month Contract | (Outside IR35) | Scotland based| Starting ASAP Day Rate: £DOE About the Role: CHI in Local Government Solution Toolkit Design This assignment supports the Community Health Index in Local Government project. You will act as technical lead within a small CHI team (PM, Product Owner … Enterprise Architect in support) to create a toolkit of integration tools to enable Local Govt and Partners to utilise CHI for identity management including API framework design Service Design Technical consultant to LG, Health Boards and other partners of varying organisational size and capability Essential Skills & Experience ...

intersection of knowledge graphs, real-time IoT data, and enterprise integration—building infrastructure that thousands of businesses will depend on. What You'll Own Design the framework that supports multiple partnership and customer models: Deep Embedded (white-label components), Best-of-Breed SaaS (standalone platform with APIs), Data Layer … Only (predictions via API) Evaluate architectural tradeoffs across complexity, risk, scalability, time-to-market, and value capture for each pattern Make build vs. buy decisions: direct API integrations vs. iPaaS middleware vs. embedded agents Define authentication strategies across OAuth 2.0, certificate-based auth, and federated identity for different ...

have a passion for building robust, high-performance applications and leading a talented team, we want to hear from you! Responsibilities: Fullstack Architecture & Development: Design and implement end-to-end architectures for mobile (Ionic) and web (Angular) applications, integrated with robust backend services NET/Azure, Kubernetes Technical Leadership … frontend applications using Angular and Ionic. Backend Development: Oversee the development of scalable and reliable backend services using Net (C, Azure services, and Kubernetes. API Design & Development: Design and develop RESTful APIs to facilitate communication between frontend and backend systems. Performance Optimization: Implement and monitor performance metrics ...

Embedding model optimisation and semantic search Context window management and chunking strategies MCP & Tool Integration Model Context Protocol (MCP) implementation LLM tool calling and API design AWS Lambda integration with agents AI Safety & Evaluation Guardrail implementation (hallucination detection, toxicity filtering) Response evaluation frameworks and A/B testing … Advanced Python AWS SDK (boto3) Infrastructure as Code awareness (CloudFormation/Terraform) Git and CI/CD for ML systems UX Engineer - Skills & Requirements Design & Prototyping Advanced Figma skills Wireframing, interactive prototyping, and design systems Responsive web and mobile design Conversational UX Chatbot and conversational interface design ...

technology landscape. Define enterprise wide integration strategy. Provide technical insight while working with Change, Technology and Data teams on platform architecture & implementations. Technical Design/Governance. Translate strategy into a phased and implementable architecture roadmap. Stakeholder Management Experience Required: Architecture focused on software development, integration and technical architecture design. … API implementations, Message Queues and Event Driven Architecture - (ideally Azure Service Bus and Kafka). RESTful API design and API Gateway management. DevOps principles. CI/CD tools. Azure platform - (including IaaS, PaaS, Azure Databricks, Azure Data Factory and Azure Storage). In line with ...

interfaces, and define non-functional requirements. Ensure solutions are fit for purpose by collaborating with stakeholders and vendors, while assessing the impact of strategic design decisions. Work closely with both business and technology teams to shape the solution intent and architectural vision. Rapidly develop high-level architecture, refining details … prioritise technology-focused backlog items for the architecture runway. Provide clarity to development teams on architectural aspects, offering solution options to overcome impediments. Conduct design reviews to confirm all non-functional requirements are met (e.g., security, performance, scalability, usability, reliability). Operate as an individual contributor. Required Skills ...

architecture expertise to shape secure, resilient solutions within a regulated financial services environment. This role combines application architecture leadership with network security and segmentation design, requiring someone who can confidently operate across both disciplines. This is a must-have role for candidates with a software development background first … deeply understand application architecture, and can also design the network and security controls required to protect those applications. The role is inside IR35 with a requirement to be in the Sheffield office up to 3-days per week. The role You will own end-to-end security solution design ...

looking for an experienced Kotlin & Swift Developer with strong computer vision experience to design, build, and maintain a high-performance Software Development Kit (SDK) used in security-critical mobile applications. This role sits at the intersection of mobile engineering, applied computer vision, and SDK architecture, and will play … role in delivering reusable, secure, and developer-friendly components used by third-party teams and partners. Key Responsibilities SDK Design & Development Design and develop a cross-platform mobile SDK (iOS & Android) using Swift and Kotlin Create clean, modular, well-documented SDK APIs for external developers Ensure ...

looking for an experienced Kotlin & Swift Developer with strong computer vision experience to design, build, and maintain a high-performance Software Development Kit (SDK) used in security-critical mobile applications. This role sits at the intersection of mobile engineering, applied computer vision, and SDK architecture , and will play … role in delivering reusable, secure, and developer-friendly components used by third-party teams and partners. Key Responsibilities SDK Design & Development Design and develop a cross-platform mobile SDK (iOS & Android) using Swift and Kotlin Create clean, modular, well-documented SDK APIs for external developers Ensure ...

FinTech/RegTech startup, growing fast and trusted by regulated organisations. Engineering quality is at the core of everything we do - we value clean design, strong ownership, and systems that scale. The Opportunity We’re looking for a Go Backend Engineer who wants to level up into a senior … data-intensive systems and be trusted with real ownership from day one. This is not a “ticket-factory” role, you’ll be involved in design decisions, architecture discussions, and performance optimisation, with direct exposure to the CTO and senior engineers. If you enjoy solving complex backend problems, learning modern ...

will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities Working in a team of Front-End engineers Writing clear & concise code Working closely with Back-End engineers Participate … architecture design code reviews API design with the Back-End engineers and other team members to establish more functional, cohesive code Create, maintain documentation while implementing the best coding practices standards Hands-on approach Participation in sprint rituals What you’ll need 6+ years experience developing large ...

grown-up software engineering!This team is at the heart of how Workhuman helps our customers build and sustain cultures of gratitude. These teams design and deliver innovative solutions that enable our customers to spread a culture of recognition and celebration within their workplaces. Tech stack used by this … team: Java 17, Spring (Spring Boot, Spring Web Stack, Spring Data or Spring JDBC), RESTful webservices, Apache Kafka, Apache Camel, AWS, Terraform, API, Oracle, Postgres, NoSQL DB, PL/SQL, JMeter, Jenkins, Sonar, Maven, Git, Docker/Containerization, AWS OpenSearch, AWS Lambda, What you will do: Collaborate with ...

automation, and continuous improvement—and they’re looking for someone who shares that mindset. Key responsibilities as the Senior Back-End Software Engineer are: Design and develop backend services using Node.js and TypeScript , deployed in a cloud-native environment. Build and maintain GraphQL and REST APIs to support … team. Skills & Experience needed: Essential: Strong experience with Node.js and TypeScript Proven background in microservices architecture Solid understanding of GraphQL and RESTful API design Experience with SQL and NoSQL databases Familiarity with CI/CD, automated testing, and modern development workflows Desirable: Experience with Azure or other cloud ...

team, you'll help shape how Sanofi connects its global digital ecosystem. You'll lead the move from legacy, file-based integrations to modern API and event-driven architectures, creating the patterns, frameworks, and platforms that enable seamless connectivity across the enterprise. Based within Sanofi's Digital Architecture function … improve people's lives. Main Responsibilities: Lead the definition of next-generation architecture patterns and reference architectures, driving consistency and modernization across the enterprise Design and establish enterprise integration patterns that enable the shift from file-based to API and event-driven architectures, improving interoperability and reducing complexity ...

modern CMS ecosystem. Key Responsibilities: Architect, build, and maintain full-stack applications using TypeScript, React, and Node.js. Provide technical direction by contributing to design decisions, architectural options, and solution trade-offs. Lead improvements to automated testing practices, ensuring robust unit, integration, and E2E test coverage. Drive enhancements … Node.js, React, and Next.js. Professional experience with cloud platforms (AWS preferred). Experience with automated testing and CI/CD pipelines. Understanding of RESTful API design, microservices, and modern web application architecture. Experience with mentoring junior and mid-level engineers. Excellent collaboration, problem-solving, and communication skills, with ...