401 to 425 of 455 API Design Jobs

Senior Product Manager - US Payments New London

Location
City of Edinburgh, Scotland, United Kingdom
roadmap to achieve that vision. Be responsible for communicating the vision to the whole business Drive product delivery forwards ; collaborate with engineers on API design and integration patterns, help the team deliver at pace by challenging assumptions and constantly improving ways of working, manage feature development vs tech ...

End-to-End Product Engineer — Hybrid, Global Scale

Location
Greater London, England, United Kingdom
Lupa Pets Ltd is hiring a software engineer to own features end-to-end across the full stack, from API design to React interfaces and database migrations. You will ship a real, user-facing product reaching vets and pet parents daily, collaborating with product and design ...

Senior Cloud Engineer

Hiring Organisation
Anson Mccade
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Developer to join a specialist engineering team delivering secure, mission-critical technology for UK National Security customers. The role offers the chance to design, develop, deploy and maintain cloud-native applications and services on Amazon Web Services (AWS), supporting systems that contribute to the UK's national security … takes ownership of the full software delivery lifecycle and wants to apply their technical skills to work with a meaningful national impact. Key Responsibilities Design, develop, deploy and maintain cloud-based applications and services using AWS. Build secure, scalable and resilient cloud solutions that support critical National Security customer ...

Senior Backend Engineer, Enterprise Partner Platform

Location
Greater London, England, United Kingdom
Wise Platform in London is seeking a Senior Backend Engineer to join our Partner Experience team. You will design and build backend microservices, focusing on partner onboarding, permissions, and cross-border payment tooling, with a strong emphasis on reliability and security. You’ll work across API design ...

Backend Engineer – Real-Time Data Platform (Rust)

Location
Greater London, England, United Kingdom
Augur Communications Ltd is seeking a Backend Engineer to design and build the distributed systems, storage infrastructure, and platform primitives that underpin Augur's sensor integration product. You will work across the full backend surface—from stream processing and storage to API design and data pipelines—using ...

Typescript Engineers (DRWN)

Location
Greater London, England, United Kingdom
senior, hands-on engineers are needed to join a product development team working on an experimental, high-ambition product initiative. You will independently design, build and iterate on product features end to end, with a strong focus on backend services and AI-powered capabilities built on LLMs and agentic … TypeScript expertise on the backend (Node.js with NestJS, Express or Fastify) Proven delivery of production-grade applications from concept through to release Strong API design and system integration experience Ability to own features independently with minimal oversight Working knowledge of LLMs, agentic AI and AI-powered applications Familiarity ...

Senior Software Engineer - Web (Squad Lead)

Location
Kings Hill, England, United Kingdom
Overview Senior Software Engineers own the technical delivery of a small squad (typically 3–5 engineers) building software with Blazor, C# and RDT’s design system, and report to the Head of Software Engineering. A Senior Software Engineer role combines hands‐on technical leadership with line management responsibility … grow their skills and careers. Key Responsibilities You will lead a small squad delivering web applications built with Blazor, C# and RDT’s design system, setting technical direction and owning code quality within the squad. You will build enterprise, cloud-native applications in Azure, and be involved ...

AI Product Director

Location
Greater London, England, United Kingdom
leader who delivers measurable results for sophisticated AI products under ambiguous conditions in a fast‐paced environment someone who is as comfortable discussing an API spec or an auth flow with an engineering team as they are presenting an AI strategy to senior management. You will thrives in collaborative … engineering workflows. Genuinely technical and a proven builder. Comfortable as a hands‐on partner with engineering and data science teams, able to reason through API design, system architecture, and technical trade‐offs, with credibility to lead build‐versus‐partner‐versus‐defer decisions. Proven experience identifying, validating, and prioritising ...

Product Manager

Location
Greater London, England, United Kingdom
will have ownership and autonomy from Day One. There is no corporate ladder at Arondite. From your first day, you will directly influence the design, functionality, and direction of Arondite’s product offering. We hire the best people and give them extremely high levels of autonomy … synthesising their feedback Building a clear, explainable process for prioritising work in the face of B2G uncertainty Communicating to and working with Engineering and Design to build powerful, simple features that can be customised to deliver value to a wide set of users Championing a culture of technical excellence ...

Senior iOS Engineer

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£498 - £664/day
partners across product, legal, policy, and design. What We're Looking For 8+ years of professional iOS development experience with modern Swift and Cocoa design patterns. Agentic workflow adoption: Hands-on experience integrating tools like Cursor and Claude into daily engineering. Platform & API design: Proven track record ...

Senior Software Engineer, Full Stack (C# (.NET)

Location
Belfast City District, Northern Ireland, United Kingdom
Team: Activity Monitor The Role We are seeking a Senior Full Stack Software Engineer (.NET) to join TRG Screen’s engineering team. You will design, develop, and evolve backend services and frontend applications across our enterprise product suite - a hands-on role that blends new feature development with improving … driven engineering organisation; this role is expected to use AI tooling by default across the full development lifecycle. Responsibilities Development & Delivery Design, develop, and maintain backend services and frontend applications for TRG Screen products, including modernisation and maintenance of legacy code. Participate in the full SDLC - requirements analysis, design ...

Technical Team Lead

Location
Greater London, England, United Kingdom
React/Node problems and reference implementations that model the technical bar. Owning technical direction: Leading architecture, boundaries, standards, build‐vs‐buy decisions, integration design and the call on when to take on technical debt and when to pay it down. Protecting release quality and operations: Owning release readiness … stay in the code, not step away from it. You’re technically strong: You’re confident in React, Node, modern web application development, architecture, API design, integration patterns and secure application design. You know how to raise the engineering bar: You’re an authoritative reviewer, able to review ...

Senior Security Architect & Platform Lead

Location
City Of London, England, United Kingdom
lead Zero Trust initiatives, and document architecture decisions with a focus on secure, scalable design. You will mentor engineers, drive security policy and platform API design, and collaborate with IAM, Infosec and infrastructure teams to ensure auditable controls. #J-18808-Ljbffr ...

Applied AI Product Engineer - From Prototype to Production

Location
Greater London, England, United Kingdom
will own engineering for production-ready Python services, APIs and MCP integrations, collaborating with security and technology teams in London. Strong Python and API design skills are essential, with experience in fast-moving environments. You will work under the Associate Director, Applied AI, contributing to scalable architectures, testing ...

Go Platform Engineer - AI Infra, Equity & Flex

Location
Greater London, England, United Kingdom
inference layers, implement multi-cloud orchestration, and ensure production-grade reliability. You’ll collaborate with senior engineers, write clean Go code, and contribute to API design, data models, and observability. You should be comfortable working across product features, deployment challenges, and customer interactions, with #J-18808-Ljbffr ...

Senior C#/.NET Engineer — Front Office Trading Modernisation

Location
Greater London, England, United Kingdom
leadership experience. The role involves delivering end-to-end solutions, collaborating with the application team, and influencing enterprise-level strategies. Strong C#/.NET, API design, and cloud experience are essential. #J-18808-Ljbffr ...

Backend Architect for AI-Driven Biotech Lab

Location
Greater London, England, United Kingdom
experiments. You’ll build backend systems that make our lab programmable and architect data pipelines for large-scale protein characterization. This role focuses on API design, instrument integration, and translating complex workflows into reliable software, with a strong emphasis on autonomy and pragmatic engineering. We value biology interest ...

Senior .NET Engineer

Location
United Kingdom
will bring Experience delivering and maintaining .NET applications in production, with examples of decisions you owned. Confidence with relational data, SQL queries, transactions, API design and authentication and authorisation. The ability to explain trade-offs, break work into deliverable increments and ask when a requirement is unclear. ...

AI Engineer Python

Location
Bracknell, England, United Kingdom
level Software Engineer with deep Python expertise to build reliable internal platforms and developer-enablement capabilities. This is an engineering-first role: strong software design, coding fluency and practical problem-solving are essential. You will apply AI in pragmatic ways-such as designing document search and conversational experiences using … Retrieval-Augmented Generation (RAG)-while maintaining a high bar for engineering quality, security, scalability and operational excellence. What You’ll Do Design, build and maintain production-grade Python services, libraries and developer tools. Apply modern Python practices, including packaging, type hints, asynchronous programming and maintainable API design. Create ...

Cloud Engineer

Hiring Organisation
Anson Mccade
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
looking for an experienced Cloud Engineer with strong AWS expertise to design, develop, deploy and maintain cloud-based applications and services. You will work as part of an autonomous DevOps team, collaborating with software engineers, technical specialists and client stakeholders to deliver secure, scalable and reliable cloud solutions. … enjoys problem-solving, embraces new technologies and wants to take ownership of delivering high-quality cloud solutions within a collaborative engineering environment. Key Responsibilities Design, develop and maintain applications and services hosted on Amazon Web Services (AWS). Work across the full software development lifecycle, including requirements gathering, solution ...

Product Manager, Customer Service Platform

Location
Greater London, England, United Kingdom
empathetic support at scale. You'll help improve the advisor experience through intelligent tooling, define how customers reach support across channels, and strengthen the API layer underpinning our service ecosystem. Your work will bring platform thinking together with real human impact, helping our advisors do their best work … support across chat, email, social messaging, and emerging channels, helping the right contact reach the right advisor at the right time. Strengthen the foundational API layer connecting our support systems, with a focus on reliability, extensibility, and developer experience as the platform scales. Take initiatives from discovery through launch ...

Senior Java Developer

Location
Greater London, England, United Kingdom
party integrations. You will work closely with Product Owners, Frontend Developers, DevOps, and QA to ensure smooth, efficient, and secure platform operations. Key Responsibilities: Design and implement backend systems capable of handling thousands of concurrent player connections across multiple services. Develop scalable, modular microservices to support game logic, session … management, and operational services. API Development. Ensure low-latency data processing to support game engines. Collaborate with the product team to build new features, improve system performance, and support business requirements. Work with relational databases such as PostgreSQL and Oracle to ensure reliable and efficient data operations. Manage service ...

Cloud Engineer

Hiring Organisation
Anson Mccade
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Cloud Engineer to join a specialist engineering team delivering secure, mission-critical technology for UK National Security customers. The role offers the chance to design, develop, deploy and maintain cloud-native applications and services on Amazon Web Services (AWS), supporting systems that contribute to the UK's national security … takes ownership of the full software delivery lifecycle and wants to apply their technical skills to work with a meaningful national impact. Key Responsibilities Design, develop, deploy and maintain cloud-based applications and services using AWS. Build secure, scalable and resilient cloud solutions that support critical National Security customer ...

AWS Cloud Engineer

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
opportunity to take ownership of technical solutions, work across the full delivery lifecycle and contribute to projects with real-world impact. Key Responsibilities Design, develop and maintain cloud-based applications and services using AWS. Configure and manage AWS infrastructure to deliver secure, scalable and reliable solutions. Apply infrastructure … languages. Work with AWS services to support compute, storage, networking, security and application integration. Contribute to the full software delivery lifecycle, from requirements and design through to deployment and ongoing support. Apply DevOps principles to automate deployments, improve reliability and streamline engineering workflows. Collaborate with technical colleagues and stakeholders ...

Senior Java Developer (6 month contract)

Location
Belfast City District, Northern Ireland, United Kingdom
/post-trade transparency, and venue/instrument data flowsTranslate regulatory requirements into robust, auditable technical solutionsParticipate in Agile ceremonies and contribute to design, development, testing, and documentationWrite unit, integration, and functional tests; support automated test pipelinesDeploy services in AWS and contribute to CI/CD pipeline developmentRequirements5+ years … Java development experience, with strong proficiency in Spring BootSolid understanding of microservices architecture and RESTful API designExperience deploying to and developing in AWS or other public cloud environmentsFamiliarity with Agile development practices and tools (e.g., Jira, Git, Jenkins)Strong communication skills and ability to work closely with non-technical ...