76 to 100 of 533 API Design Jobs in England

Senior Application Architect (Java with AWS)

Hiring Organisation
London Stock Exchange Group
Location
Nottingham, Nottinghamshire, United Kingdom
Salary
£ 70 K
innovation within the LSEG ecosystem.WHAT YOU'LL BE DOING: Build Logical, Physical, Implementation and Process Solution Architecture designs where required.Be responsible for cloud infrastructure design and develop detailed architecture design for the application.Through understanding of cloud native architecture and principles.Optimise cost of cloud solutions by identifying waste … implementation for availability, recovery, reusability, performance, maintainability, security, capacity, and compatibility.Partner with Solution Architects to produce where required:Domain/business logic model designInteroperability design such as API and MessagingData model designPartner with the Infrastructure team to produce physical architecture designs.Pair design with other Application Architects ...

VP Platform - Engineering & Architecture

Location
Birmingham, England, United Kingdom
coherent, aligned and fit for purpose given the company strategy. 6x Delivery Performance: Architect application frameworks and patterns (e.g., modularity, high cohesion, spec-first API design) that enable a 6x improvement in product development cycles through agentic AI workflows. Commercial Delivery Support: Partner with product engineering to ensure … modernisation roadmap, using the "5Rs" framework (Rehost, Replatform, Refactor, Rewrite, Replace) to maximise EBITDA impact. Platform Services Delivery & Growth Acceleration Platform-as-a-Product: Design, build and deploy the engineering roadmap for the core platform fabric and the suite of self-service platform products that abstract complexity and allow ...

Core Simulation Engine Engineer

Location
Greater London, England, United Kingdom
community Comfort with physics and robotics and an understanding of how a simulator such as Genesis-World works and is used Opinions about API design Bonus: experience with Drake, MuJoCo, Newton, Isaac, RaiSim, Jiminy, or Brax Bonus: PyTorch, Triton, JAX, or Numba Bonus: 3D tooling and interactive editors … Highest-signal resume keywords Python Engineering JIT Compilation Developer Tooling Open-Source Experience Physics and Robotics Hard Skills Architecture Refactoring Typing Performance Profiling Debugging API Design Code Generation GPU Computing Simulation Serialization Soft Skills Community Communication Issue Triaging Industry Keywords Simulation Physics Solvers Robotics Interactive Editors 3D Tooling ...

Senior Software Engineer (Full Stack)

Location
Greater London, England, United Kingdom
when: technical approach, task breakdown, sequencing, capacity, andthe quality bar, and be accountable for delivery; Hold the line on backend design discipline, so that services stay maintainable as the teamand codebase grow; Collaborate with Product, Design, and QA to define, design, and ship features,distinguishing core engineering … experience as a Tech Lead or in a similar technical-leadership role, owning ateam's technical approach and delivery; Strong backend fundamentals: Clean Architecture, design patterns, and API design, with hands-on experience in C#/.NET or Node/TypeScript; Proven experience building single-page ...

Java API Developer, Assistant Vice President

Hiring Organisation
State Street Bank
Location
London, United Kingdom
Salary
£ 80 K
DescriptionRole Summary :We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands‐on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilities—spanning digital custody, tokenization enablement, digital transfer agency … will work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements.Role Description:Design, develop, and maintain Java backend services and REST APIs that support digital asset product flows (custody, tokenization, TA, digital cash/settlement) and integrate ...

Full Stack Engineer

Location
Greater London, England, United Kingdom
work alongside architects, product stakeholders and delivery partners to ship software that brokers and analysts use every day.**Key Responsibilities:*** **Build Across the Stack:** Design, build and ship features end to end, from APIs and services through to responsive, accessible user interfaces.* **Cloud Native Delivery:** Develop and run cloud … usable, performant ways for brokers and analysts.* **AI-Enabled Development:** Build AI-enabled product features using patterns such as retrieval-augmented generation, tool and API integration, evaluation and human-in-the-loop design.* **AI-Assisted Engineering:** Use AI-assisted engineering tools such as Claude Code or Claude Cowork ...

Senior Solutions Consultant

Location
Greater London, England, United Kingdom
with Account Executives, Customer Success Managers, and Service Delivery to solve complex identity challenges for enterprise customers, leading efforts from the discovery and solution design through to evaluation for prospects and existing customers. You’ll translate technical and business requirements into scalable solutions, lead technical engagements, and ensure customers … Advise on best practices across identity, compliance, fraud, risk and integrations, adapting your approach to different customer contexts and levels of technical depth Strong API expertise (REST, API design, OAuth, API keys, JSON/XML) with the ability to translate complexity into clear, actionable solutions Comfortable ...

SAP BTP Integration Architect

Hiring Organisation
VBeyond Corporation
Location
London Area, United Kingdom
govern the end-to-end integration strategy for the S/4HANA Bluefield migration, ensuring alignment with enterprise architecture principles. Architect BTP Solutions: Design and architect robust integration scenarios using the full suite of SAP BTP services, with a heavy focus on SAP Integration Suite (Cloud Integration/… API Management, and Event Mesh. Govern Technical Design: Lead design authority sessions to review and approve all integration patterns, ensuring they are standard, reusable, and fit for purpose. Bluefield Migration Expertise: Provide expert guidance on the unique integration challenges of a Bluefield (system conversion) migration, including ...

Technical & Solution Architect (Distributed Ledger / Regulated Financial Services)

Hiring Organisation
Delta Capita
Location
London, United Kingdom
Salary
£ 80 K
This is a hands-on technical leadership position in the making.You will work across product management, engineering, and client-facing discussions to evolve the design of a distributed ledger-based post-trade platform operating within regulated financial services. You will initially contribute as a senior engineer while progressively taking … ownership of system-level architecture, solution design, and technical direction.This role is ideal for someone who wants to: Move from senior engineer to architect; Work on real financial market infrastructure problems; Combine deep technical thinking with business context; Shape a product at an early stage.Why join ...

Mid-Level Full-Stack Software Engineer

Location
Greater London, England, United Kingdom
Full-Stack Software Engineer with strong experience in C#/.NET Core and modern front-end technologies (React, JavaScript/TypeScript, HTML, CSS) to design, develop, and maintain robust APIs and user interfaces for our enterprise applications. The ideal candidate will be passionate about clean code, scalable architecture … high quality products. Exposure to modern AI tools and services (such as GitHub Copilot or APIs from providers like Anthropic) is beneficial. You Will: Design, develop, and maintain RESTful APIs using .NET Core. Work with data from SQL (MS-SQL server) and NoSQL (MongoDb) databases and external APIs. Ensure ...

Enterprise Software Architect

Location
Bromley, England, United Kingdom
enterprise and partner ecosystems. The position also plays a key role in shaping industry best practices and representing the organisation externally. Enterprise & Ecosystem Architecture Design and oversee the implementation of enterprise‐wide software architecture, spanning internal platforms, cloud environments, and external partner ecosystems Develop “big picture” architectural frameworks … adherence to security, compliance, regulatory, and quality standards Identify and mitigate long‐term architectural risks (e.g., vendor lock‐in, scalability constraints, regulatory exposure) Technical Design & Solution Development Conduct research, analyse data, gather requirements, and define end‐to‐end solutions Create architectural artefacts representing system functions, integrations, and user interfaces ...

Technology support I

Hiring Organisation
JP Morgan Chase
Location
London, United Kingdom
Salary
£ 100 K
operational stability routines to identify recurring interruption patterns and support validated remediation actions aligned to resiliency and security expectations.Execute creative LLM-assisted software solutions; design, develop, and troubleshoot LLM-powered applications and services (e.g., retrieval augmented generation, agent workflows, structured extraction, classification) with a willingness to think beyond routine … implement LLM-assisted microservices, synchronous and asynchronous inference pipelines (streaming where appropriate), deterministic fallbacks, circuit breakers, and observability for reliability in production.Produce architecture and design artifacts, deliver model cards, system/data lineage, RAG/agent reference architectures, prompt libraries and versioning strategies, evaluation plans, and control evidence ensuring ...

Lead Azure Engineer

Location
Sheffield, England, United Kingdom
Title: Azure Engineer This role leads the design and delivery of cloud-native, full stack products on Microsoft Azure, running on Azure Kubernetes Service (AKS). You will be hands‐on across the stack while setting technical direction, strengthening engineering standards, and ensuring solutions are secure, resilient, observable … full stack delivery across React (TypeScript) front-end applications and Java/Python back‐end services, including microservices and APIs. Own cloud‐native solution design for AKS‐based platforms, defining service boundaries, resilience patterns, scaling approaches, deployment strategies, and operational readiness. Design, build, and operate back‐end services ...

Senior Software Engineer

Location
Reading, England, United Kingdom
Engineering Lead, and fellow engineers to look after the shared in‐house components consumed by other development squads — including auth, audit, developer portal, and API gateway. You’ll be joining us at a pivotal moment! We're transitioning to a product‐driven culture where your voice and expertise will … networking) Focuses on usability, adoption, reliability, and long‐term evolution As a Senior Software Engineer, you will combine technical depth, product thinking, and systems design to ensure these shared services are robust, scalable and developer‐friendly. Product & Ownership Design, build and evolve shared application services used across multiple ...

Lead Azure Engineer

Hiring Organisation
Teksystems
Location
Sheffield, South Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £550/day
Title: Azure Engineer Job Description This role leads the design and delivery of cloud-native, full stack products on Microsoft Azure, running on Azure Kubernetes Service (AKS). You will be hands-on across the stack while setting technical direction, strengthening engineering standards, and ensuring solutions are secure, resilient … full stack delivery across React (TypeScript) front-end applications and Java/Python back-end services, including microservices and APIs. Own cloud-native solution design for AKS-based platforms, defining service boundaries, resilience patterns, scaling approaches, deployment strategies, and operational readiness. Design, build, and operate back-end services ...

VP, Full-Stack Software Engineer (Java)

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent
heart of this role both as embedded capabilities within the client facing product and as a core methodology in how we design, build, and ship software (AI-augmented development, AI-driven code generation, and AI-assisted quality assurance). About You You are an experienced software engineer … operational stability matter as much as delivery speed. You enjoy understanding how data flows through systems, how workflows interact across services, and how design decisions affect our clients. You can work autonomously in complex codebases, while collaborating closely with peers across engineering, product, and QA. You embrace ...

AWS Solution Architect

Location
Cambridge, England, United Kingdom
Summary Solution Architect AWS | Microservices & Event-Driven Architecture Cambridge - Hybrid - 2 days The Opportunity We're looking for an experienced Solution Architect to design and lead the implementation of scalable, cloud-native systems on AWS. You'll work across engineering, product and business stakeholders to define architecture for distributed … business goals, run architecture reviews and threat modelling sessions, and own the technical roadmap across multiple product domains. Lead service decomposition using Domain-Driven Design - defining bounded contexts, inter-service contracts, and REST/GraphQL/gRPC APIs - and set patterns for resilience (circuit breakers, retries, bulkheads) and observability ...

Python Technical Lead FinTech

Hiring Organisation
Run-Time Group Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent
major advantage. Key Responsibilities Technical Leadership Own the technical roadmap, guide architectural decisions, and ensure engineering excellence across backend services. Python Engineering Design and build robust, secure, and scalable microservices using Python (FastAPI, Django, Flask). System Architecture Lead the design of distributed systems, event-driven architectures … data intelligence. DevOps & Cloud Collaborate on CI/CD pipelines, containerisation (Docker, Kubernetes), and cloud deployments (AWS/GCP/Azure). Data & API Strategy Oversee API design, data modelling, and integration with internal and external financial systems. Security & Compliance Ensure systems meet regulatory, security, and audit ...

Backend Developer

Location
Oxford, England, United Kingdom
role and a brief description of some of the key tasks to be performed. This list is not totally exhaustive. Major Responsibilities Design, develop, and maintain scalable back-end services, APIs, integration platforms, databases, and Microsoft Azure cloud-native solutions to deliver defined requirements across regulated and non-regulated … modern development tooling to maintain code quality and consistency. Develop unit, integration, and automated tests and contribute to verification evidence, code quality, and design reviews. Participate in daily stand-ups, design reviews, and collaborative team activities with internal and external teams, supporting Product Owners and Business Analysts ...

Symfony Developer

Location
Greater London, England, United Kingdom
that challenge and inspire you. Here's what a typical day might look like: Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications … Optimize application performance and database queries Responsibilities Develop and maintain Symfony-based applications with clean, efficient code Design and implement RESTful APIs using API Platform or FOSRestBundle Build reusable bundles and Symfony components Integrate third-party services and APIs into applications Optimize application performance and database queries Write ...

Java API Developer, Officer

Hiring Organisation
State Street Bank
Location
London, United Kingdom
Salary
£ 80 K
Role Summary :We are seeking a Java API Developer to join our Digital Asset development team. This is a hands-on software engineering role responsible for designing, developing, testing, and supporting RESTful APIs and backend services in a financial services environment. The role contributes to building reliable, secure … will work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements.Role Description :Design, develop, and maintain Java-based backend services and REST APIs that support financial services workflows and data use cases.Implement APIs in line with internal ...

Software Engineer

Location
Milton Keynes, England, United Kingdom
building its Payment Facilitator (PayFac)/Acquiring platform and is looking for a hands-on, experienced Software Engineer to take full ownership across design, build, and delivery. This is not a traditional engineering role — there is no rigid separation between engineering and product. You will work directly alongside … product instinct to define scope and prioritise work independently. Payments or fintech exposure is required; what matters is your ability to design and build reliable, scalable systems and to move fast without sacrificing quality. A generalist mindset — able to deliver in key areas, learn others, outsource/work with ...

Java API Developer, Officer

Hiring Organisation
State Street Bank
Location
London, UK
Employment Type
Full-time
Role Summary :We are seeking a Java API Developer to join our Digital Asset development team. This is a hands-on software engineering role responsible for designing, developing, testing, and supporting RESTful APIs and backend services in a financial services environment. The role contributes to building reliable, secure … work closely with cross-functional teams to build robust, scalable, and secure digital asset products that meet our business and technical requirements. Role Description :Design, develop, and maintain Java-based backend services and REST APIs that support financial services workflows and data use cases. Implement APIs in line with ...

Senior Data Architect

Hiring Organisation
SIX Group
Location
London, United Kingdom
Salary
£ 80 K
across the firm to ensure our data products deliver value to our customers and they can be readily maintained and enhanced. This encompasses the design and architecture of logical and physical data models and schemas, data transport mechanisms, metadata management, lineage management, API schema design and enabling … financial information to be accessible to AI agents.What You Will Do • Design, develop and maintain the technology-agnostic, business-aligned canonical/conceptual data models for Financial Information, defining class definitions, standards and association semantics.• Provide data architecture expertise to all delivery teams to ensure we build data products ...

Senior Data Architect

Location
Greater London, England, United Kingdom
across the firm to ensure our data products deliver value to our customers and they can be readily maintained and enhanced. This encompasses the design and architecture of logical and physical data models and schemas, data transport mechanisms, metadata management, lineage management, API schema design and enabling … financial information to be accessible to AI agents. What You Will Do Design, develop and maintain the technology-agnostic, business-aligned canonical/conceptual data models for Financial Information, defining class definitions, standards and association semantics. Provide data architecture expertise to all delivery teams to ensure we build data ...