1 to 25 of 84 API Design Jobs in London

12+mths contract, 2 days onsite/3 days remote, PAYE/Umbrella options. Open Stack/Salesforce & ReactNative - Salesforce, ReactNative (Web), Java, TDD, RESTful API design & build, OAS/YAML, Unit Testing, GitLab, CI/CD Pipelines, SonarQube, Veracode, Jira, Confluence Open Stack BA - Salesforce, ReactNative (Web), Java … RESTful API design & build, OAS/YAML, Unit Testing, GitLab, CI/CD Pipelines, Jira, Confluence API Developer - Java, TDD, RESTful API design & build, OAS/YAML, GitLab, CI/CD Pipelines, Java Database-Hibernate/JPA, SonarQube, Veracode, Jira, Confluence Click Apply ...

seeking an experienced Solution Architect with strong expertise in Apache Kafka and real-time payment systems within the banking domain. The ideal candidate will design scalable, event-driven architectures that power high-volume, mission-critical payment processing platforms. This role requires deep knowledge of distributed systems, financial transaction processing … regulatory-compliant banking solutions. Key Responsibilities Architecture & Design Design and implement event-driven, microservices-based architectures using Apache Kafka Architect scalable and resilient real-time payment processing systems Define canonical data models for financial transactions and reconciliation Ensure high availability, fault tolerance, and disaster recovery strategies Lead architecture ...

site Due to the urgency and sensitivity of the work, active SC Clearance is mandatory . Responsibilities As an Application Architect, you will: Design and lead delivery of scalable, high-performance application architectures Define and apply modern application architecture patterns , including microservices, event-driven architectures, and SOA Support monolith … microservices transformation initiatives where required Architect cloud-native applications across AWS, Azure, and/or GCP Design API strategies , integration patterns, and messaging-based solutions Ensure strong alignment with application lifecycle management , CI/CD pipelines, and DevOps practices Work closely with platform and engineering teams to align ...

pressure; make frame-time and latency predictable across device classes Define and monitor SDK health metrics at scale (crashes, ANRs, error rates, perf envelopes) API design and developer experience Design clear, stable, Kotlin-first public APIs (versioned, well-documented, testable) Implement best practices for networking, auth … fixes and verify via dashboards Provide concise developer-facing change notes/migration snippets to the Solutions Engineer for release notes Roadmap contribution Co-design the next generation of the Android Captur SDK for release at the end of Q2 Champion performance budgets and device-class targets during planning ...

Overview: We are seeking a technically proficient Data Analyst to join our IT Department. This role will focus on API design and systems integrations , playing a vital part in enabling data-driven decision-making and ensuring seamless data exchange across internal and external platforms. Key Responsibilities: Design … . Ensure data quality, compliance, and governance across all integrations. Support automation efforts by embedding APIs into existing workflows. Work closely with vendors to design solutions aligned with architectural standards and best practices. Key Skills & Experience: Proven experience in a Data Analyst or similar technical role. Strong hands ...

Role We’re hiring a Backend Engineer to build the core infrastructure behind Revax’s AI-native platform for professional services. You’ll design, optimise, and scale the systems that power multi-agent drafting, knowledge graphs, and auditable AI workflows used by accountants, tax advisors, and consultants at leading … graphs, and real-world enterprise workflows. What You’ll Do Build & own core backend systems · Build and optimise databases for complex, real-world data · Design and implement APIs using FastAPI for AI workflows and product features · Build and scale LangGraph-based multi-agent systems with checkpointing, retries, and observability ...

transformation and ensuring data is protected and used ethically. Talan UK & Ireland provides a range of consultancy and outsourcing capabilities including programme management, market design and governance. We also have extensive and award-winning capabilities across cyber security, data privacy and digital transformation. We are IIP Gold accredited … recruiting an ambitious and technically accomplished Solutions Architect to join our Digital business unit as a Principal Consultant. You will lead the design and delivery of scalable, secure, and cloud-native platforms across Energy (including Low Carbon and UK regulatory systems), Financial Services, Public Sector, and Healthcare domains. This ...

Development Write production‐grade code for full‐stack applications using Python and modern frontend frameworks Build and maintain scalable REST APIs and microservices architectures Design application architectures and implement technical solutions Develop user interfaces and data visualization components Write comprehensive tests and ensure code quality Debug and optimize application … performance Cloud Architecture & Services Design and architect cloud‐native applications and solutions on Azure Leverage Azure services including App Services, Azure Functions, AKS, Storage, Data Factory, Cosmos DB Implement scalable, resilient, and cost‐effective cloud architectures Optimize cloud resource utilization and performance Design for high availability, disaster recovery ...

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 ...

data-powered applications. We are seeking an experienced Senior Product Manager who will be accountable for designing and delivering the road map for molecule design products to support GSK Research and Development. This role will be pivotal in ensuring a cohesive enterprise level strategy towards molecule design solutions … medicines for our patients. In this role you will: Own and lead the product roadmap, product development, launch and adoption of novel molecule design solutions to benefit the scientific community at GSK across multiple departments Play a key role in defining the strategic direction for molecule design tools ...

will be a hands-on technical leader who defines direction, raises engineering standards, and delivers measurable product outcomes, all while remaining deeply involved in design and development. This is not a traditional people-management or delivery-management role—here, you will write code, architect solutions, lead complex projects … role is perfect for leaders seeking high-growth, product-driven environments, who are passionate about distributed systems, and who want to directly influence the design of secure, scalable, and resilient infrastructure while cultivating top engineering talent.What You'll Do:Architect and design scalable, resilient, high-performance backend systems ...

will be a hands‐on technical leader who defines direction, raises engineering standards, and delivers measurable product outcomes, all while remaining deeply involved in design and development. This is not a traditional people‐management or delivery‐management role—here, you will write code, architect solutions, lead complex projects … role is perfect for leaders seeking high‐growth, product‐driven environments, who are passionate about distributed systems, and who want to directly influence the design of secure, scalable, and resilient infrastructure while cultivating top engineering talent. What You'll Do: Architect and design scalable, resilient, high‐performance backend ...

Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … 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 (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

create solutions that are both technically robust and aligned with business ambition. You will help us modernise our trading platform by applying contemporary design patterns, cloud-native engineering principles, and architectural thinking that supports performance, scalability, and future growth. Throughout the delivery lifecycle, you will provide guidance, ensure alignment … front-, middle-, and back-office workflows, ensuring that every componentfrom deal capture to optimisation and reportingworks seamlessly together. Key areas of focus include: Architecture & Design You will lead architectural direction for our trading systems, documenting key decisions, making thoughtful trade-offs, and ensuring that every design reflects both ...

create solutions that are both technically robust and aligned with business ambition. You will help us modernise our trading platform by applying contemporary design patterns, cloud-native engineering principles, and architectural thinking that supports performance, scalability, and future growth. Throughout the delivery lifecycle, you will provide guidance, ensure alignment … front-, middle-, and back-office workflows, ensuring that every componentfrom deal capture to optimisation and reportingworks seamlessly together. Key areas of focus include: Architecture & Design You will lead architectural direction for our trading systems, documenting key decisions, making thoughtful trade-offs, and ensuring that every design reflects both ...

looking for an experienced 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 a key role … 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 the SDK is easy ...

Months London Onboarding after BGV completion We are looking for an experienced Infrastructure Engineer with deep Google Cloud Platform (GCP) networking expertise to design, build, automate, and operate cloud network services at scale. The role includes DNS as a Service offering, IP Address Management (IPAM), integrations with ServiceNow, FinOps … compliance. Youll partner with Operations, Security, FinOps, and Platform Engineering to deliver reliable, compliant, and cost-optimized cloud networking services. Key Responsibilities Network Design & Operations (GCP) Design, implement, and operate GCP networking: VPCs, subnets, routing (Cloud Router/BGP), VPC peering, Private Service Connect, Cloud NAT, Cloud Firewall ...

alignment between technical and business leaders, balancing strategic direction with delivery needs. Represent architecture in governance forums, supporting prioritization, risk discussions, and assurance reviews. Design, Analysis & Governance Create high-quality architectural artefacts including diagrams, data flows, integrations, future-state designs, and migration pathways. Evaluate technology options and assess impacts … digital or enterprise environments. Strong software engineering foundation, with practical knowledge of modern application architectures (e.g., microservices, APIs, distributed systems). Proven ability to design and document architectures using visual modelling techniques such as C4, UML, and data flow diagrams. Hands-on experience with at least one major cloud ...

Senior Java Developer (Chinese Speaking) role at EezeEeze is a fast-growing iGaming provider looking to expand its operations in the European market. We design, develop, and deliver immersive live casino games tailored to your brand and its audience.Job Summary:As a Senior Java Developer within Core Team … reliable individual with a solid understanding of Java and Spring alongside being passionate for new technology trends!Key Responsibilities:API Development: architect and code integration APIs to support seamless communication between systemsFeature Implementation: collaborate with the product team to maintain existing features and implement new enhancementsNew Services: design ...

Onsera's core product platforms, from wearables integration and health data pipelines to member payments and AI workflows. As a player-coach, you'll design and implement full-stack solutions while setting engineering standards and help build and mentor our engineering team as we scale. This role offers … opportunity to shape API-first architectures, lead complex integrations with healthcare partners and SaaS platforms, and transition into engineering leadership as the organization scales. What You'll Do Own technical delivery of multiple Onsera products from design through production and iteration Design and implement full-stack solutions ...

core stack includes: The Engine: Expert-level C# and .NET Core mastery. Architecture: Deep understanding of SOA (Service Oriented Architecture) and complex Object-Oriented design patterns. System Dynamics: Specialized knowledge of concurrency, asynchrony, and parallelism —essential for real-time transactional processing. Data & Web: High proficiency in SQL Server … API design, and modern front-end fundamentals (HTML/CSS/JS). Reliability: A strict practitioner of TDD (Test Driven Development) and robust CI/CD processes. Desired Innovations Our client is actively modernizing. Exposure to the following is highly valued: Cloud & Orchestration: Azure ecosystems, Docker ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

Full timeposted on: Posted Todayjob requisition id: R-100439**Job Description:****About the Role**We are seeking a **Manager, Software Engineering** to guide the design, development, and delivery of the Odyssey product – a multi-tenant SAAS application for international container shipping companies while mentoring a team of senior … technical vision, architecture, and standards for the Odyssey product* Provide hands-on guidance and code reviews to ensure scalability, reliability, and maintainability.* Drive design discussions and decision-making that align with long-term business and technology goals.* Lead technical discovery, proof-of-concepts, and architectural spikes for new initiatives. ...

deep technical expertise in Python, LangChain, and OpenAI services, particularly within Azure environments. You will lead the technical delivery of the client’s Chat API, ensuring it is robust, scalable, and continuously improving. Responsibilities Lead the development and enhancement of the Chat API using Python, LangChain, and OpenAI … services on Azure Function Apps Monitor and resolve API bugs and performance issues to ensure high availability and reliability Oversee and troubleshoot data ingestion processes supporting the chatbot’s functionality Collaborate with solution architects, product teams, and the cloud team to deliver a reliable and scalable solution Champion best ...

building the new evolution of the financial infrastructure globally and you will be in the center of it. Your Primary Responsibilities Architect Blockchain Solutions: Design end-to-end blockchain architectures for applications in digital assets, payments, settlement, identity, and smart contracts. Technology Strategy: Define blockchain adoption strategies aligned with … organizational goals, compliance standards, and market trends. Solution Design & Integration: Develop solution blueprints integrating blockchain with existing banking systems, APIs, cloud services, and fintech platforms. Technical Leadership: Collaborate with development teams to ensure architectural consistency, performance, and security across blockchain-based applications. Stakeholder Collaboration: Work closely with business leaders ...