51 to 75 of 215 API Design Jobs in England

Lead C# Engineer - Agentic Workflows & AI Engineering, AWS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £800 to £900 per day OUTSIDE IR35
Looking For: SeniorStaff-level backend engineer with deep, current expertise in C# and .NET Core 8/9 , capable of architecting and leading the design of distributed REST API microservices at scale. Authority in AWS serverless architecture; Lambda-first, with strong working knowledge of API Gateway … agent orchestration, context management, custom commands/skills and scaling AI-assisted delivery across a team. Expertise across Aurora RDS MySQL and DynamoDB; schema design, access patterns, indexing, query tuning, single-table vs multi-table trade-offs, and pragmatic thinking around consistency, scaling and cost. Proven experience designing event ...

Solutions Architect POS

Hiring Organisation
AbsoluteLabs
Location
London, UK
seasoned Solution Architect with deep expertise in Point of Sale (POS) to drive architecture for next-generation retail systems. This role will lead the design of store systems within an omnichannel ecosystem, ensuring seamless integration across POS, eCommerce, CRM, ERP, and payment platforms. You will play a key role … secure POS solutions across global retail environments. Key Responsibilities : Lead end-to-end solution architecture for POS platforms across store and retail ecosystems. Design scalable architectures covering store systems, mPOS, self-checkout, and backend services. Define integration frameworks between POS, ERP, CRM, OMS, inventory, and payment gateways. Collaborate with ...

Solutions Architect POS

Hiring Organisation
AbsoluteLabs
Location
Greater London, England, United Kingdom
seasoned Solution Architect with deep expertise in Point of Sale (POS) to drive architecture for next-generation retail systems. This role will lead the design of store systems within an omnichannel ecosystem, ensuring seamless integration across POS, eCommerce, CRM, ERP, and payment platforms. You will play a key role … secure POS solutions across global retail environments. Key Responsibilities : Lead end-to-end solution architecture for POS platforms across store and retail ecosystems. Design scalable architectures covering store systems, mPOS, self-checkout, and backend services. Define integration frameworks between POS, ERP, CRM, OMS, inventory, and payment gateways. Collaborate with ...

Full Stack Developer

Hiring Organisation
HR GO Recruitment
Location
Liverpool, Merseyside, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £600/day
offered as a remote full-time contract with potential for extension depending on performance and project needs. Project Overview You will contribute to the design and development of a scalable CRM platform used to: Manage customer lifecycle and engagement Store and process customer and organisation data Automate workflows … Support internal operational tools for teams The platform is built using modern TypeScript-based full-stack technologies , microservices architecture, and cloud infrastructure. Key Responsibilities Design, develop, and maintain CRM platform features across the full stack Build scalable backend services using Node.js and TypeScript Develop modern user interfaces using React ...

Cloud Engineer

Hiring Organisation
Anson Mccade
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
maintaining services-while being fully supported by a broad engineering community dedicated to continuous learning and innovation. Key Responsibilities of the Cloud Engineer Design, build, deploy and maintain applications and services on AWS Contribute to technical decision-making and cloud architecture discussions Develop solutions using AWS best practice, cloud … eagerness to learn Experience working in Agile environments Desirable Skills of the Cloud Engineer AWS Associate certification (Solutions Architect, Developer, or DevOps) Microservices and API design experience Containerisation and orchestration (Docker, Kubernetes, ECS, EKS) Knowledge of AWS monitoring, observability, and FinOps principles CI/CD tooling experience (Jenkins ...

Senior Solutions Engineer

Hiring Organisation
Wise
Location
London, Greater London, United Kingdom
Employment Type
Full Time
Salary
87500-111000
team works with top tier global financial institutions and major tech companies to offer Wise products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves Wise Platform by increasing … improve turnaround times. Designing and developing innovative new features that expand the functionality of Wise's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of Wise's platform. Diagnosing and resolving complex technical issues ...

AWS Solution Architect

Hiring Organisation
Anson Mccade
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
could be the role for you! What You'll Have the Opportunity to Do: • Develop and execute AWS workloads using cutting-edge cloud patterns • Design expandable application solutions in sync with best practice for performance, resilience and cost • Set up and manage CI/CD pipelines and apply cloud … security principles • Work alongside different clients and multi-functional teams to deliver solutions • Produce premium design documentation • Build and tune system architectures to ensure reliable, scalable and maintainable solutions About The Candidate The right candidate for the role of AWS Architect will have/gain the following experience: • Appropriate ...

Cloud SRE

Hiring Organisation
Deep Sea Electronics Ltd
Location
Hunmanby, North Yorkshire, UK
have hands-on experience building monitoring solutions, CI/CD pipelines, and cloud infrastructure, along with the ability to communicate effectively across requirements, design, development, and testing. You’ll primarily contribute to DSE’s IoT platform (DSE WebNet), alongside developing supporting tools and business systems. Our products operate … systems, and cloud-native practices. Key Responsibilities: Capture software and infrastructure requirements from project inception Ensure platform reliability, security, safety, and compliance standards Design and maintain monitoring, alerting, and dashboards (Grafana, OpenTelemetry) Own SLOs, SLIs, and error budgets for the DSE WebNet IoT platform Provision and manage cloud infrastructure ...

Cloud SRE

Hiring Organisation
Deep Sea Electronics Ltd
Location
Hunmanby, England, United Kingdom
have hands-on experience building monitoring solutions, CI/CD pipelines, and cloud infrastructure, along with the ability to communicate effectively across requirements, design, development, and testing. You’ll primarily contribute to DSE’s IoT platform (DSE WebNet), alongside developing supporting tools and business systems. Our products operate … systems, and cloud-native practices. Key Responsibilities: Capture software and infrastructure requirements from project inception Ensure platform reliability, security, safety, and compliance standards Design and maintain monitoring, alerting, and dashboards (Grafana, OpenTelemetry) Own SLOs, SLIs, and error budgets for the DSE WebNet IoT platform Provision and manage cloud infrastructure ...

Cloud SRE

Hiring Organisation
Deep Sea Electronics Ltd
Location
Mansfield, England, United Kingdom
have hands-on experience building monitoring solutions, CI/CD pipelines, and cloud infrastructure, along with the ability to communicate effectively across requirements, design, development, and testing. You’ll primarily contribute to DSE’s IoT platform (DSE WebNet), alongside developing supporting tools and business systems. Our products operate … systems, and cloud-native practices. Key Responsibilities: Capture software and infrastructure requirements from project inception Ensure platform reliability, security, safety, and compliance standards Design and maintain monitoring, alerting, and dashboards (Grafana, OpenTelemetry) Own SLOs, SLIs, and error budgets for the DSE WebNet IoT platform Provision and manage cloud infrastructure ...

Lead Software Engineer

Hiring Organisation
Immersum
Location
London Area, United Kingdom
with an award-winning digital product studio known for building beautifully crafted, human-centred digital products for global clients. With a strong reputation across design, product and engineering, they deliver impactful work across the full product lifecycle — from early discovery through to large-scale builds. They’re now looking … Role This is a hands-on technical leadership position , combining full-stack development with ownership of technical direction across projects. You’ll: Lead the design, development and delivery of scalable digital products (frontend, backend & infrastructure) Drive technical direction , ensuring solutions are robust, secure and performant Stay close ...

Cloud DevOps Engineer

Hiring Organisation
Anson Mccade
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
where you'll engineer cloud-native solutions that directly support mission-critical capabilities. In this role, you will work within empowered DevOps teams to design, build, deploy and maintain applications and services on AWS. You'll collaborate closely with end-users, experiment with new technologies, and influence architectural decisions. … solving skills Experience working within agile delivery environments Desirable Experience of the Cloud DevOps Engineer AWS Associate-level certification (Architect, Developer, DevOps) Microservices and API design knowledge Experience with Docker, Kubernetes, ECS, EKS Understanding of monitoring, observability and FinOps in cloud environments CI/CD experience (Jenkins, Bamboo ...

Cloud DevOps Engineer

Hiring Organisation
Anson Mccade
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent, Work From Home
where you'll engineer cloud-native solutions that directly support mission-critical capabilities. In this role, you will work within empowered DevOps teams to design, build, deploy and maintain applications and services on AWS. You'll collaborate closely with end-users, experiment with new technologies, and influence architectural decisions. … solving skills Experience working within agile delivery environments Desirable Experience of the Cloud DevOps Engineer AWS Associate-level certification (Architect, Developer, DevOps) Microservices and API design knowledge Experience with Docker, Kubernetes, ECS, EKS Understanding of monitoring, observability and FinOps in cloud environments CI/CD experience (Jenkins, Bamboo ...

Lead Fullstack Engineer

Hiring Organisation
Immersum
Location
London, UK
with an award-winning digital product studio known for building beautifully crafted, human centred digital products for global clients. With a strong reputation across design, product and engineering, they deliver impactful work across the full product lifecycle — from early discovery through to large-scale builds. They’re now looking … Role This is a hands-on technical leadership position, combining full-stack development with ownership of technical direction across projects. You’ll: Lead the design, development and delivery of scalable digital products (frontend, backend & infrastructure) Drive technical direction, ensuring solutions are robust, secure and performant Stay close ...

Lead Fullstack Engineer

Hiring Organisation
Immersum
Location
City of London, London, United Kingdom
with an award-winning digital product studio known for building beautifully crafted, human centred digital products for global clients. With a strong reputation across design, product and engineering, they deliver impactful work across the full product lifecycle — from early discovery through to large-scale builds. They’re now looking … Role This is a hands-on technical leadership position, combining full-stack development with ownership of technical direction across projects. You’ll: Lead the design, development and delivery of scalable digital products (frontend, backend & infrastructure) Drive technical direction, ensuring solutions are robust, secure and performant Stay close ...

Senior C# Developer

Hiring Organisation
Adria Solutions
Location
Warrington, Cheshire, North West, United Kingdom
Employment Type
Permanent
Salary
£85,000
exciting opportunity to work on challenging projects, influence architecture decisions, and help shape the future of our software solutions. What Youll Do Design, develop, and maintain high-quality C# applications across our platform Work on AI-enabled solutions and integrate machine learning capabilities where relevant Ensure applications are secure … design and adhere to best practices in cybersecurity Collaborate with cross-functional teams including product, QA, and DevOps Participate in code reviews, mentoring junior developers, and promoting best practices Solve complex technical problems and contribute to the overall architecture strategy What Were Looking For Essential: Strong experience with C# ...

Full Stack Engineer

Hiring Organisation
SR2 | Socially Responsible Recruitment | Certified B Corporation™
Location
City of London, London, United Kingdom
build. The team is small, collaborative, and deliberately high calibre. Engineers are trusted to take ownership, contribute to product direction, and work closely with design and commercial teams to shape what gets built. What you will be doing Building end to end features across backend and frontend, from APIdesign through to UI Working closely with product and design to turn ideas into well thought through functionality Improving performance, usability, and reliability of a live product used by real customers Contributing to technical decisions as the platform evolves and scales Owning meaningful parts of the product rather ...

Principal Fullstack Engineer

Hiring Organisation
RE Partners
Location
England, United Kingdom
with strong LLM experience ( Claude preferred). Key Responsibilities: Develop and maintain backend services using Java, with a strong focus on server-side engineering Design and implement scalable, secure, and high-performance APIs Lead backend development initiatives and enforce best coding practices Contribute to the React frontend, ensuring seamless … code reviews, architecture discussions, and performance optimization Requirements : Strong backend development experience with Java (preferably Spring Boot) Deep expertise in server-side architecture and API design/development Proficiency in React for frontend development Hands-on experience with LLM/AI tools (e.g., Claude or similar) and integrating ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Birmingham, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Southampton, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Leicester, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
London, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Nottingham, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Swindon, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

Senior Technical Architect

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
Sheffield, UK
role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...