1 to 25 of 153 API Design Jobs

Solution Architect Open Banking API Channel Capabilities

Hiring Organisation
Capgemini
Location
london, south east england, united kingdom
Solution Architect Location: London About the Job you are considering: As a Solution Architect you will be at the forefront of this transformation shaping API channel capabilities embedded treasury integrations onboarding experiences and Open Banking remediation initiatives You will define secure scalable and partner ready architectures that enable seamless … Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time. Key Accountabilities: API Channel Architecture Leadership Lead the design of external API channel capabilities ensuring high performance secure and standards aligned connectivity for clients and ecosystem ...

Java Solution Architect - Lansing, MI

Hiring Organisation
Digital Technology Solutions
Location
Michigan, United States
Employment Type
Permanent
Salary
USD Annual
Kubernetes Proven experience with Kafka or other messaging platforms, including enterprise integration patterns Solid understanding and practical application of DDD, CQRS, Saga patterns, and API design best practices Role description: Job Summary: We are seeking an experienced Solution Architect to design and deliver scalable, cloud-native solutions … event-driven architectures. The role focuses on building resilient distributed systems, enabling enterprise modernization, and driving high-quality technical delivery across platforms. Job Responsibilities: Design end-to-end architecture for scalable microservices and distributed systems Drive monolith to microservices modernization using DDD and API-first principles Architect event ...

Senior Software Engineer

Hiring Organisation
Tiro Partners
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£80000 - £120000/annum
Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

Senior Software Engineer

Hiring Organisation
Tiro Partners Limited
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £120,000 per annum
Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

Java Engineer

Hiring Organisation
Tiro Partners Limited
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £120,000 per annum
Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Company: Financial Services Location: London - Hybrid 3 days per week CORE BANKING AND TRADING SYSTEMS EXPERIENCE ESSENTIAL Join a newly formed Service Modernisation & AI team driving AI-first software development in financial services. … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

Solution Architect Corporate Payments

Hiring Organisation
Capgemini
Location
london (city of london), south east england, united kingdom
contact the recruiter directly. Job Title: Solution Architect Location - London About the Job you are considering: As a Solution Architect you will lead the design of critical Identity Verification IDV capabilities across European markets ensuring corporate clients and administrators can initiate and manage IDV workflows seamlessly You will also … your home; noting that you will be unable to work at home 100% of the time. Key Accountabilities European IDV Architecture Lead the design and implementation of European Identity Verification IDV solutions incorporating regional regulatory expectations and cross jurisdictional onboarding requirements Define consistent IDV patterns APIs and service integrations ...

Backend Data Engineer -PHP, APIs & ETL

Hiring Organisation
HTC Global Services Inc
Location
Phoenix, Arizona, United States
Employment Type
Permanent
Salary
USD Annual
Data Engineer to build and support backend services, data pipelines, and database structures for the Public Health Data Portal. This role focuses on RESTful API development, ETL pipelines, synchronization processes, and multi-store database design to support both public-facing and administrative capabilities. You will collaborate with cross … functional teams to deliver a secure, scalable, and maintainable data foundation. Key Responsibilities Backend API & Service Development Design and develop RESTful API services for data retrieval, metadata management, content management, authentication, audit logging, export generation, and data synchronization Implement authentication filters, rate limiting, request logging, and standardized ...

Senior Web Application Developer ASP.NET MVC 5, C#, & React

Hiring Organisation
PCR Digital
Location
Hammersmith, London, United Kingdom
Employment Type
Contract
Contract Rate
£425 - £538/day Inside IR35 to Umbrella
years of Web application development experience consisting of strong C#, ASP.NET MVC 5, and React. Strong knowledge of Object-Oriented Programming, SOLID principles, common design patterns and RESTful API design and integration (experience with SOAP WebServices and XML/XPat) also required. We are looking … Server, Entity Framework, and React experience desirable to have HTML5, CSS3, JavaScript, jQuery. * Strong knowledge of Object-Oriented Programming, SOLID principles, and common design patterns. * Experienced in RESTful API design and integration; experience with SOAP WebServices and XML/XPath. * Skilled in using IoC containers (Autofac, Ninject ...

Technical Architect

Hiring Organisation
Beazley
Location
birmingham, midlands, united kingdom
driven principles. This role provides technical leadership across multiple teams, setting direction for .NET, front-end frameworks, and integration patterns. The Technical Architect will design and document architectural standards, guide teams toward our north star architecture, and champion best practices in automation, DevOps, and cost optimisation. Acting … ensures technology decisions support Beazley’s strategic objectives for innovation, operational excellence, and long-term sustainability with a strong focus on domain-driven design and event-driven architecture leveraging Kafka and related technologies. Key Responsibilities: Architecture & Design Design: Lead the design and implementation of solutions aligned ...

Senior Software Engineer

Hiring Organisation
Expedia Group
Location
City of London, London, United Kingdom
across Expedia’s white-label and partner platforms. We’re building the next generation of video ad infrastructure, AI-powered tooling, and Rapid API integrations to deliver smarter, more engaging ad experiences. In this role, you will: Design, implement, and evolve high-quality software services and components, including … system design, low-level design, API design, and data modeling to support scalable, reliable products. Lead end-to-end delivery of complex technical features across services or domains, including requirements clarification, solution design, development, testing, deployment, and ongoing operational support. Collaborate closely with product, architecture ...

Solution Architect Digital Client Self Service Enterprise API Journeys

Hiring Organisation
Capgemini
Location
london, south east england, united kingdom
largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Job Title: Solution Architect Digital Client Self Service Enterprise API Journeys Location: Northampton About the Job you are considering: The Capgemini Financial Services Open Banking Centre of Excellence COE partners with leading banks … transform their Digital Client Self Service capabilities through API first cloud native solutions As a Solution Architect you will drive the design and delivery of end to end digital journeys many of which require extensive collaboration across groups and functions beyond Corporate Banking You will play a central ...

Lead Backend Engineer - Assistance

Hiring Organisation
N26 GmbH
Location
Berlin, Germany
Employment Type
Permanent
Salary
EUR Annual
well as working with a high degree of autonomy. Who we are N26 has reimagined banking for today's digital world. Technology and design empower everything we do and it's how we are building the global banking platform the world loves to use. We've eliminated physical branches … tech scope: work hand in hand with PM and EM to manage product technical roadmaps and dependencies to minimise technical debt. Architect & Build: Design, develop, and maintain high-availability, high-performance web applications that serve as the backbone of our internal operations. Foster tech-solid delivery: Drive the team ...

Lead Backend Engineer - Assistance

Hiring Organisation
N26 GmbH
Location
Potsdam, Brandenburg, Germany
Employment Type
Permanent
Salary
EUR Annual
well as working with a high degree of autonomy. Who we are N26 has reimagined banking for today's digital world. Technology and design empower everything we do and it's how we are building the global banking platform the world loves to use. We've eliminated physical branches … tech scope: work hand in hand with PM and EM to manage product technical roadmaps and dependencies to minimise technical debt. Architect & Build: Design, develop, and maintain high-availability, high-performance web applications that serve as the backbone of our internal operations. Foster tech-solid delivery: Drive the team ...

Senior Software Developer

Hiring Organisation
Birketts LLP
Location
Sevenoaks, Kent, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
This is a hands-on software engineering role, ideal for someone who thrives on solving complex problems in a collaborative, agile environment. You will: Design, develop and test Azure cloud native software using C# and .Net technologies, in line with an agreed schedule Ensure code is testable, safe, functional … secure, performant and reliable, all proven through testing Apply software development, microservices and API design best practices, and participate in code reviews Produce relevant and high standard documentation, developer-level tests, and deployment procedures Give accurate task estimates, and provide progress status to management Collaborate with cross-functional ...

Lead Full Stack Developer

Hiring Organisation
Goodman Masson
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £100,000 per annum
shaping Meteor's digital future. Key Responsibilities Lead, mentor, and inspire a team of developers, fostering a culture of technical excellence and continuous improvement Design, develop, and maintain high-quality software solutions across the full stack Architect and implement systems using .NET, JavaScript, SQL, and modern frontend frameworks Oversee … API design and integrations, ensuring secure and efficient data exchange Translate business and stakeholder requirements into clear technical solutions Conduct code reviews and ensure adherence to coding, security, and quality standards Drive continuous improvement in development workflows, testing, and deployment practices Support the professional development of team members ...

Staff Engineer

Hiring Organisation
Tata Consultancy Services
Location
London Area, United Kingdom
matters, through challenging projects which demand ambitious innovation and thought leadership. The Role As a Staff Engineer (Backend – Java), you will be lead the design and development of highly scalable, resilient, and performant backend systems. This role is suited for a hands-on technical leader who can set engineering … drive complex solutions across multiple teams. Your responsibilities: Technical Leadership Evolve the technical strategy and architectural direction for backend services and distributed systems. Design scalable, fault-tolerant, event-driven, and cloud-native backend architectures. Lead complex engineering initiatives spanning multiple teams, domains, or platforms. Provide deep hands-on expertise ...

Head of Forward Deployment Engineering

Hiring Organisation
Triple
Location
United Kingdom
agents to connect with any core banking system, card processor, or dispute platform Own the technical quality of every client integration, from secure API design and data pipeline reliability to compliance with bank-grade security requirements Create scalable deployment tooling, integration templates, and automation that reduce time … Deep experience integrating with enterprise systems in financial services, payments, or similarly regulated industries Strong proficiency in Python and SQL. Hands-on experience with API design, data pipelines, and infrastructure automation Track record of building engineering teams or functions from early stage, including hiring, process design ...

C# / .Net Software Engineer (Freelance / contractor)

Hiring Organisation
Qim info
Location
London Area, United Kingdom
collaborate with international clients and are looking for skilled contractors to support project-based engagements. 📄 Your responsibilities: The objective of this role is to design, build, and govern an API integration layer connecting multiple internal and external systems within a complex energy trading environment. 💼 Required technical skills: API … Integration Architecture: Strong expertise in API integration, REST API design and exposure, interface-driven architectures, integration-heavy environments, abstraction layers, system decoupling Backend Development: .NET Core, C#, API services, integration services Architeture & Platforms: Design of scalable and reusable integration layers, interoperability with multiple systems (internal ...

Associate Data Architect

Hiring Organisation
Elsevier
Location
london (city of london), south east england, united kingdom
contact the recruiter directly. Data Architect - Submissions Technology Elsevier | Technology | Platform Architecture About the Role We are looking for a Data Architect to help design and evolve the data architecture that powers Elsevier's next-generation publishing and peer-review platforms . You will play a key role … enable collaboration between authors, reviewers, and editors across the global research community . Responsibilities: Define and evolve the data architecture for the Submissions platform Design and maintain the core manuscript and submission domain data models Establish domain-driven data boundaries across platform capabilities Define scalable data access patterns ...

Software Engineer Mid-level (Java Full Stack)

Hiring Organisation
USAA Careers
Location
Phoenix, Arizona, United States
Employment Type
Permanent
Salary
USD Annual
within the Investment Experience Technology organization at USAA, part of the Technology group. As an engineer on our new investment services platform, you will design and implement high-impact solutions. Collaborate with a strong team to deliver scalable, high-quality software. This is your opportunity to be part … following locations: San Antonio, TX, Plano, TX, Phoenix, AZ, or Charlotte, NC. Relocation assistance is not available for this position. Tasks: Design, develop, code, and test complex technical solutions Investigates and resolves complex application and system technical problems and production issues through troubleshooting techniques. Continually improves operations by conducting ...

Software Engineer Mid-level (Java Full Stack)

Hiring Organisation
USAA Careers
Location
San Antonio, Texas, United States
Employment Type
Permanent
Salary
USD Annual
within the Investment Experience Technology organization at USAA, part of the Technology group. As an engineer on our new investment services platform, you will design and implement high-impact solutions. Collaborate with a strong team to deliver scalable, high-quality software. This is your opportunity to be part … following locations: San Antonio, TX, Plano, TX, Phoenix, AZ, or Charlotte, NC. Relocation assistance is not available for this position. Tasks: Design, develop, code, and test complex technical solutions Investigates and resolves complex application and system technical problems and production issues through troubleshooting techniques. Continually improves operations by conducting ...

Principal Software Engineer (Payments)

Hiring Organisation
X4 Technology
Location
City of London, London, United Kingdom
their latest platform, provide technical expertise at both the architectural and hands-on development levels, and mentor junior team members. What You’ll Do: Design and build scalable payment applications and APIs Develop modern frontend interfaces and backend services Integrate with payment providers and financial systems Optimise database performance …/Angular), HTML5, CSS3 Backend: Python REST APIs Data: MySQL, PostgreSQL, Redis Cloud & DevOps: AWS, Docker, CI/CD, Kubernetes (nice to have) Architecture: API design, OAuth/JWT authentication, queues, webhooks, payment integrations Previous experience in Financial Services What We’re Looking For: Strong system design ...

Senior Full Stack Developer (React & C#.NET)

Hiring Organisation
Adecco
Location
London, United Kingdom
Employment Type
Contract
Python (pyspark): Experience with data pipelines and analytics is a plus. Power BI: Familiarity with developing dashboards and data models. Architecture: Knowledge of microservices, API design, and event-driven architectures. DevOps/CI/CD: Experience with Azure DevOps, GitLab, GitHub Actions, or similar tools. Cloud Platforms: Proficient … Azure preferred). Databases: Strong skills in SQL Server, PostgreSQL, or other relational databases. containerisation: Experience with Docker and Kubernetes. Key Responsibilities Design & Develop: Create and maintain full stack applications using React JS and C#.NET Core. Build Services: Develop high-performance backend services and RESTful APIs with a focus ...

Solution Architect (Principal Consultant)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
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 ...

Senior Developer

Hiring Organisation
Reed.co.uk
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 per annum
venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with … Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast ...