76 to 100 of 101 API Design Jobs in London

Lead Full Stack Engineer

Hiring Organisation
Calyptus
Location
Greater London, England, United Kingdom
right solutions, in the right way, at the right time. What They’ll Do Own architecture and technical strategy for core domains and systems. Design, guide, and implement complex, cross-functional solutions spanning multiple areas of the product. Write high-impact code, including reference implementations, critical-path systems … Engineers will work on meaningful production challenges that combine physical systems, real-world constraints, and measurable impact, including: Heat loss modelling and hydronic system design 2D and 3D floor-plan tooling using LiDAR and computer vision Large-scale data ingestion and geospatial analysis Offline-first collaborative PWAs Hardware integrations ...

Product Manager

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£80000 - £110000/annum
Technical Skills Required Data Tools: SQL, Python, Snowflake/Databricks, Tableau/Power BI. Frameworks: Agile/Scrum, MLOps, Data Governance, Metadata Management. Integration: API design, event-driven architecture, and data modeling. Randstad Technologies is acting as an Employment Business in relation to this vacancy. ...

Senior Software Engineer

Hiring Organisation
Experis UK
Location
London Area, United Kingdom
Senior Software Engineer — AI & Multimodal Data Platforms About the Role We are seeking an experienced Senior Software Engineer to help design and build next-generation AI systems used in Defence, Security, and Resilience environments. You will work on a cutting-edge multimodal data fusion platform that transforms large-scale … closely with senior technical leadership, platform engineers, security stakeholders, and mission-focused teams to deliver robust, scalable, production-grade software. What You’ll Do Design, build, and operate core platform components across the AI and data stack. Develop distributed systems that ingest, transform, and serve diverse multimodal datasets. Contribute ...

iOS Developer

Hiring Organisation
Expedia Group
Location
City of London, London, United Kingdom
architectural direction, influencing engineering standards, and shaping the evolution of AI-enabled capabilities across the mobile platform. In this role, you will: Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite. Architect and implement robust, scalable … system and API designs, including effective data modelling to support complex business requirements. Drive cross-functional collaboration to define, develop, and ship impactful features, ensuring alignment with organisational goals and technical strategy. Champion best practices in software engineering, testability, and maintainability through code reviews and mentoring. Safely integrate ...

Lead Python Developer

Hiring Organisation
Total Recruitment Group
Location
South East London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
stuck into some genuinely interesting engineering. Think computational complexity, mathematical optimisation, and performance challenges at scale - a long way from your average API job. Requirements: 7+ years experience developing and maintain scalable Python/FastAPI back-end services Ideally worked with high-performance APIs for complex hierarchical data queries … code Lead technical planning by breaking down roadmap items into scoped engineering work, driving ADRs and setting standards for code quality, testing, and API design Collaborate cross-functionally with front-end, data engineering, modelling and product teams to deliver reliable, impactful features Line-manage a team ...

Lead Python Developer

Hiring Organisation
trg.recruitment
Location
London, UK
stuck into some genuinely interesting engineering. Think computational complexity, mathematical optimisation, and performance challenges at scale - a long way from your average API job. ⚡ Requirements: 7+ years experience developing and maintain scalable Python/FastAPI back-end services Ideally worked with high-performance APIs for complex hierarchical data queries … code Lead technical planning by breaking down roadmap items into scoped engineering work, driving ADRs and setting standards for code quality, testing, and API design Collaborate cross-functionally with front-end, data engineering, modelling and product teams to deliver reliable, impactful features Line-manage a team ...

Software Engineering Manager

Hiring Organisation
KDR Talent Solutions
Location
London Area, United Kingdom
platform ⌈Azure, Databricks⌋, but this role is heavily focused on the software engineering and integration side of things. The journey starts by owning complex API layers and mentor growing engineers, whilst yourself growing into the responsibilities of a Head of Engineering. I learnt something new today → The events world … relies entirely on third-party connectivity, and you'll own the API layers to enable to Azure Data Platform. WHY THIS ROLE You get to stay close to the tech, leading code reviews and driving software standards. True mentorship focus—they have bright junior devs ready to learn from ...

Senior Product Engineer - End-to-End, AI-Driven Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
with LLM integration, and working across the stack with React/TypeScript. The ideal candidate will have strong experience in Python, product delivery, and API design. The role offers a competitive salary package, significant equity, full private healthcare, and wellness benefits. #J-18808-Ljbffr ...

Principal iOS Engineer - Search and Recommendations Experience

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Overview Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Introduction to Team: Our Technology Team partners … discovery experiences, setting architectural direction, influencing engineering standards, and shaping the evolution of AI-enabled capabilities across the mobile platform. Responsibilities Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite. Architect and implement robust, scalable system ...

Principal iOS Engineer - Search and Recommendations Experience

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Expedia Group brands power global travel for everyone, everywhere. We design cutting‐edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future … architectural direction, influencing engineering standards, and shaping the evolution of AI‐enabled capabilities across the mobile platform. In this role you will: Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite. Architect and implement robust, scalable ...

Principal iOS Engineer - Search and Recommendations Experience

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
discovery experiences, setting architectural direction, influencing engineering standards, and shaping the evolution of AI‐enabled capabilities across the mobile platform. Responsibilities Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite. Architect and implement robust, scalable system … API designs, including effective data modeling to support complex business requirements. Drive cross‐functional collaboration to define, develop, and ship impactful features, ensuring alignment with organizational goals and technical strategy. Champion best practices in software engineering, testability, and maintainability through code reviews and mentoring. Safely integrate and operate ...

Principal Data Architect

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800 per day
Data platforms - Fabric, Snowflake, CosmoDB, DataBricks, MongoDB, RDBMS Data replication/CDC - Qlik Replicate, Oracle Golden Gate Data modeling - ERStudio Message-oriented data movement API design and access Data Analytics and AL/ML - AzureML Data virtualization Streaming data Data integration and ETL/ELT Tools - Matillion, Alteryx … NoSQL data stores, methods, and approaches (star and snowflake, dimensional modelling and third normal form) Experience with data security and data access controls and design Deep understanding of SoX, GDPR and Regulatory/CNI control environments In-depth experience in providing resolution to an extensive range of complicated data ...

Senior Consultant - Hybrid (Product / Transformation / Architecture), TC, FS

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Requisition ID: 1686605 Role highlights Early‐career hybrid who connects product, delivery and architecture. Shape stories, scenarios and NFRs with traceability to design/build. Support domain modelling and interface specifications for core programmes. Your key responsibilities Backlog shaping: user stories, scenarios, acceptance criteria and NFRs; maintain definition … ready/done. Architecture support: contribute to domain models, interface specs and API/event definitions; maintain requirements‐to‐build traceability. Delivery hygiene: reporting, risks/decisions, demos and release readiness; contribute to playbooks and templates. Continuous learning across domain, product and technical skills (DDD, data flows, integration basics ...

IT Solutions Architect (Integration / Azure)

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
that supports business critical functions across the business. My client have migrated significant services to the cloud and now requires a lead architect to design and build the next generation of solutions including core finance and HR technology landscape, automating data flows, integrating systems, supporting in the delivery … real-time reporting and analysis, whilst driving a more mature awareness to data architecture and governance across the business. Responsibilities: - Lead the design and delivery of integrations across technology platforms and solutions. - Produce architectural documentation (HLDs, LLDs, diagrams, support guides). - Ownership of integration and application architecture in alignment ...

Software Engineer

Hiring Organisation
Platform Recruitment
Location
City of London, Greater London, United Kingdom
Employment Type
Permanent
Salary
£90000 - £160000/annum
heavily backend-biased position but given the size of the team you will be working across the stack when needed Build scalable, performant systems Design and deliver end-to-end features with direct impact on customer value Work with product and ML teams to help translate abstract and complex … software function About you: Strong ability across scalable and performant systems You have a product mindset Statically typed language expertise Experience with API design Low ego and love of engineering Full details are available. Please don't hesitate to reach out for more information. ...

Lead AI Engineer

Hiring Organisation
Aturiya AI
Location
City of London, London, United Kingdom
Next.js. You've worked with LLMs in production - prompt engineering, evals, handling non-determinism. Not just tutorials. You have taste. You care about UX, API design, code structure - not because someone told you to, but because sloppy work bothers you. You default to action. When something's unclear ...

Principal Android Architect — AI-Driven Travel Search

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
experiences. The ideal candidate should have over 12 years of experience in Android application development and must possess a strong command of Kotlin and API design. This position offers an opportunity to work within a vibrant team focused on innovative solutions in the travel industry. #J-18808-Ljbffr ...

AWS Technical Architect

Hiring Organisation
Opus Recruitment Solutions
Location
Remote work, South Bank, Greater London, United Kingdom
Employment Type
Contract
Contract Rate
£0 - £600/day
/Public Sector client on a long-term contract. Key Details: You'll be working within a large-scale public sector environment, helping to design and shape modern, scalable architectures that support critical government services. Experience Cloud & architecture expertise - strong AWS architecture experience, including event-driven systems (e.g. Kafka … RESTful API design. Data & public sector experience - experience with document-based databases (e.g. MongoDB) and a solid understanding of public sector governance and assurance processes. Strong technical architecture background - experience designing secure, scalable systems using modern technologies (cloud, open source, and languages like Java, Python, JavaScript or Ruby). ...

Senior Software Engineer - ETL Pipeline Orchestration Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
edit time as well as runtime Better support and capability for creation of DAG in orchestration Programmatic recipe creation, modification and interaction to be API first LLM integration to assist in authoring ETL tasks We’ll trust you to: Work with us to design the user-friendly, fault … Java Strong problem solving skills We’d love to see: Knowledge of Database Systems and trade offs in the distributed systems Familiarity with API Designs Familiarity with Orchestration Frameworks such as Apache Airflow, Argo Workflows, Dagster etc. Experience working with and designing systems utilizing AWS Bloomberg is an equal ...

Senior Backend Engineer

Hiring Organisation
WireMock
Location
City Of London, England, United Kingdom
Company Description WireMock is the industry standard for API environment simulation. With a massive global open-source footprint and deep adoption across the Fortune 500, we provide the critical infrastructure that engineering teams use to de-couple development from fragile dependencies. As AI agents and LLM-integrated apps redefine … They’ll also have the desire to gain a deep understanding of the product and its customers, and the ability to contribute to product design decisions. They’ll also want to write and speak to our community about the product, API mocking and related topics. Design, build ...

Software Engineer | Canvas | SVG | High-Performance Charting

Hiring Organisation
techstack Recruitment
Location
London Area, United Kingdom
widely-used charting library used by thousands of developers building data-intensive applications. This is core product engineering — focused on rendering, performance, correctness, and API design. This is not a typical frontend role. You’ll be working closer to a graphics engine than an application layer. What … APIs Solving performance-critical problems in Canvas and SVG Working on correctness and precision in data visualisation Taking features end-to-end — from design through to release Collaborating with senior engineers on a highly integrated visual system Optionally contributing to technical content, demos, or talks What they’re looking ...

Client Solution Consultant, Data Foundation and MuleSoft

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
ability to influence key decision-makers throughout the sales process.* Hands-on experience with middleware, one or more of: integration architecture patterns, API technologies, enterprise messaging patterns, BPM, Data Integration, MDM, etc.* Proficient in hands-on development, coding, and API design.* Familiarity with cloud technologies, including iPaaS, SaaS ...

Client Solution Consultant, Data Foundation and MuleSoft

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Success Prior enterprise software pre‐sales experience. Proficiency building trust with clients and influencing decision‐makers. Hands‐on experience with middleware and integration architecture, API technologies, enterprise messaging, BPM, data integration, MDM, etc. Proficient in development, coding and API design. Familiarity with cloud technologies, including iPaaS, SaaS ...

Android Developer

Hiring Organisation
Expedia Group
Location
City of London, London, United Kingdom
setting architectural direction, influencing engineering standards, and shaping the evolution of AI-enabled capabilities across the mobile platform. In this role, you will: Architect, design, and deliver advanced Android mobile solutions, ensuring scalability, performance, and maintainability across Expedia Group’s travel platforms. Lead technical direction for multi-service … quality, and knowledge sharing. Safely integrate and operate AI/ML-enabled solutions that improve mobile user experiences and business outcomes. Collaborate with product, design, and engineering stakeholders to deliver innovative mobile features and drive technical strategy across the organisation. Minimum Qualifications: Bachelor’s degree in Computer Science ...

Principal Android Engineer - Search and Recommendations Experience

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Principal Android Engineer – Search and Recommendations Experience We design and build innovative mobile experiences across Expedia Group’s travel platforms. This role leads native Android search and discovery efforts for the Search and Recommendations Experience team. Responsibilities Architect, design, and deliver advanced Android mobile solutions, ensuring scalability, performance … quality, and knowledge sharing. Safely integrate and operate AI/ML‐enabled solutions that improve mobile user experiences and business outcomes. Collaborate with product, design, and engineering stakeholders to deliver innovative mobile features and drive technical strategy across the organization. Minimum Qualifications Bachelor’s degree in Computer Science ...