51 to 75 of 557 API Design Jobs in England

pace. Key Responsibilities Backend Engineering Build and maintain APIs, microservices, and data pipelines using Python, Django, Django REST Framework, FastAPI, and related platform tooling. Design service boundaries, API contracts, relational data models, and integration flows for complex property operations. Produce ERDs and other technical diagrams where they make … traces, and alerts that make production behaviour and failures easy to understand. Diagnose and resolve production incidents across services, databases, queues, integrations, and infrastructure. Design for security, resilience, performance, and data integrity across business-critical workflows. Agentic and Spec-Driven Development Partner with product managers, frontend engineers, and quality ...

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 … 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 ...

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 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 ...

digital platforms with Fullstack capabilities**. The lead engineer will set architectural standards for enterprise-grade web applications, drive UI component libraries and design system adherence, establish best practices for API integration and backend services, and mentor development teams across the software delivery lifecycle.# Key Responsibilities## Technical Leadership … Core Applications Development* **Architectural Alignment & System Design:** Provide expertise in frontend/fullstack applications programming and ensure application design strictly adheres to the overall enterprise architecture blueprint, security standards, and technology roadmap.* **Standards & Engineering Governance:** Utilize advanced knowledge of system flow to develop and enforce robust standards ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

expect most people to move between programmes as engagements start and complete. Several of these are hands-on architect roles: you will own design decisions and also write production code The kind of work The following are representative of current and upcoming engagements. Individual roles will draw on some … over days. The work includes target-state architecture and decision records, change-data-capture ingest pipelines from upstream data services, ontology and mapping-layer design across suppliers with competing data models, separation of system, reference and insight data classes including time-series, and deployment topologies spanning cloud-hosted services ...

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 ...

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 ...

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery. We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical … expertise with people-centred design, we create solutions that deliver meaningful, lasting impact. Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors. Past ...

Defence delivery team. This is a versatile, high-impact role designed for funded client delivery: you will build mission-critical web applications and API backends for central MoD programmes, while contributing to low-level system integrations (Kotlin, Android ART, IPC/AIDL) on tactical edge and Situational Awareness … platforms. You will sit at the intersection of modern enterprise software engineering and tactical edge integration, ensuring all code meets MoD Secure by Design (SbD) principles and Def Stan 00-056 safety boundaries. Requirements Full-Stack Application Development: Design and build resilient, secure web applications, microservices, and APIs ...

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 ...