26 to 50 of 120 API Design Jobs in London

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

delivery methodology to ensure timely and high-quality delivery of software applications. Technical Ownership: Take technical ownership of a product or software solution, covering design, estimation, shaping, and user story/requirement creation. Solution Documentation: Document solutions, including architecture, configuration, release, and support handover. Stakeholder Collaboration: Collaborate and liaise … practices and modern architectural patterns, including microservices and message-driven architectures. Non-Functional Requirements: Experience developing applications with non-functional requirements in mind. Application Design: Experience in application/digital services design. Software Engineering Practices: Proficiency in software engineering practices like code reviews, CI/CD pipelines, and SOLID ...

SPONSORED Location: London Our client is looking for an experienced Java Developer with active SC clearance . You'll join their team to design, build and maintain RESTful and SOAP microservices using Spring Boot in an Agile environment. As a Java Developer, you will be responsible for designing, developing … preferably should have SC/DV clearance or must be eligible and willing to go through SC/DV clearance. What you'll do Design, develop and deploy RESTful and SOAP microservices using Spring Boot Work with cross-functional teams to analyse requirements and deliver features Write clean, well ...

sector clients, helping to deliver our client services to the highest standard. The role will involve working with multiple business stakeholders, helping them to design business solutions which will then be implemented by the delivery teams. As a Junior Solution Architect, you will undertake structured analysis of technical issues … translating this analysis into designs that describe a solution. You will be consulted on design and can provide design patterns. You will identify the deeper issues that need fixing and look for opportunities to collaborate and reuse components, communicating with both technical and non-technical stakeholders. You will ...

/CD, security etc).Working within a project management/agile delivery methodologyExperience in technical ownership for a product or software solution, covering design, estimation, shaping and user story/requirement creationDocumentation of solutions (e.g., architecture, configuration, release, support-handoverCollaborate and liaise with other Version 1 and customer stakeholders … practices and modern architectural patterns, including microservices and message-driven architectures. Non-Functional Requirements: Experience developing applications with non-functional requirements in mind. Application Design: Experience in application/digital services design. Software Engineering Practices: Proficiency in software engineering practices like code reviews, CI/CD pipelines, and SOLID ...

Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. Key ResponsibilitiesDrive the design and delivery of enterprise-scale applications supporting critical business functions and large user populations. Remain hands-on with software architecture, system design, code … containers, microservices and event-driven architectures. Strong understanding of distributed systems, resiliency patterns, scalability and performance engineering. Strong knowledge of SQL and NoSQL technologies, API design and integration patterns. Excellent communication and stakeholder management skills with the ability to influence technology decisions across numerous teams and organisations. Growth ...

services and automation that connect complex infrastructure environments. The wider goal is to remove manual infrastructure processes and replace them with reliable, self-service, API-driven services. You will design and develop integrations across areas including bare-metal compute, networking, storage, cloud and workload platforms. A major part … role will involve building API services around a central CMDB, creating a reliable source of truth that can drive automated provisioning, configuration and infrastructure lifecycle management. Responsibilities will include: Building production-grade services and automation primarily in Python Designing REST APIs and integration layers across infrastructure platforms Developing CMDB ...

cloud-native adoption, and AI-assisted development practices. Position As Lead Application Architect, you'll take ownership of application-level architecture and low-level design, helping to establish development standards and modern engineering practices across the organisation. Key responsibilities include: Producing component-level and code-level designs and detailed … Level Design (LLD) documentation Translating high-level architectural designs into clear implementation plans for development teams Creating and maintaining Architecture Decision Records (ADRs) and facilitating design reviews Defining and embedding engineering standards, coding principles, and security best practices Driving adoption of AI-assisted development tools across the software ...

native adoption, and AI-assisted development practices. The Role As Lead Application Architect, you'll take ownership of application-level architecture and low-level design, helping to establish development standards and modern engineering practices across the organisation. Key responsibilities include: Producing component-level and code-level designs and detailed … Level Design (LLD) documentation Translating high-level architectural designs into clear implementation plans for development teams Creating and maintaining Architecture Decision Records (ADRs) and facilitating design reviews Defining and embedding engineering standards, coding principles, and security best practices Driving adoption of AI-assisted development tools across the software ...

engineering and delivery, shaping how apps, services, and systems come together. It’s a varied role that mixes hands-on coding with architectural design and technical leadership. You’ll design and build modern environments, integrate multiple SaaS platforms, and help set the standards for how things are done … code using Terraform and CloudFormation• Docker and Kubernetes• Automation and CI/CD pipelines• GitHub and GitHub ActionsSoftware and Frameworks• React, Node, Next.js, Python• API design and integration• RESTful services and automationData and Platforms• Salesforce• Google Workspace• Atlassian tools such as Jira and Confluence• Databases including DynamoDB, MongoDB ...

foundations: pipelines and lakehouse patterns (Microsoft Fabric/OneLake, Databricks, or equivalents), streaming and event-driven integration where the problem demands it Enterprise integration: API design and consumption at scale, including REST, OData, GraphQL, and webhook/event patterns into ERP-class systems What sets candidates apart Classical … delivery on the CTO Office's highest-priority technical projects, end to end Write and review code daily; the role never becomes slideware Design and ship agentic and LLM-based systems to production standard: retrieval at scale, evals, guardrails, security and identity, monitoring and auditability Drop into unfamiliar codebases ...

that meet our clients' needs. You will collaborate with cross-functional teams to deliver innovative products that drive business success. Core Responsibilities: Software Development: Design, develop, test and deploy software applications and features using industry best practices and coding standards. Write clean, efficient, and maintainable code that meets functional … performance requirements. Technical Design: Collaborate with product managers, designers, and fellow engineers to translate business requirements into technical designs and architecture. Participate in architectural discussions, propose solutions, and make recommendations for system improvements. Problem Solving: Analyze complex technical problems and propose creative solutions. Troubleshoot issues, debug code, and implement ...

works with top tier global financial institutions and major tech companies to offer our client 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 our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client'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 our client's platform. Diagnosing and resolving complex technical ...

works with top tier global financial institutions and major tech companies to offer our client 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 our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client'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 our client's platform. Diagnosing and resolving complex technical ...

their core mission capabilities. Youll work as part of empowered, autonomous DevOps teams with regular contact with end-users to flexibly and efficiently understand, design, develop, deploy and maintain applications and services on AWS. Youll be encouraged to identify new ways of solving problems and get to work … these, but if not well help you with them AWS Certification at Associate level eg Solution Architect, Developer or DevOps Expertise in microservices and API design Docker, and container runtime platforms such as Kubernetes, EKS, ECS etc Strong understand of operational concepts on AWS, particularly monitoring and observability ...

solution designs, including key non-functional requirements such as security, performance, resilience and maintainability. You'll possess a strong understanding of REST APIs and API design best practices. You'll have working knowledge of event-driven architecture and related design principles. You'll be able to communicate ...

real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design ...

technical outcome of the project team. What you will doTechnical direction and qualitySet the team's technical direction and own architecture and design decisions across the composable stack. Select and justify the right headless CMS, front-end framework and hosting approach for each property, weighing editorial experience, performance, cost … lock-in. Design content models and component libraries that scale across multiple brands, sites, regions and locales. Uphold coding standards and best practices through consistent code review. Ensure developers test their own work before it reaches QA, with automated testing and CI/CD in place. Hold the team ...

private markets. We are at an early stage of the build and looking for Senior Software Engineers to partner closely with Principal Engineers to design and deliver foundational capabilities. This is a hands-on role for someone who wants to help shape the architecture, standards, and engineering culture … platform while leveraging modern coding practices to deliver high-quality code and infrastructure. What you'll do Design and build backend services for the platform, primarily in Go, running on AWS with Postgres as a core data store. Own features and services end-to-end: from shaping requirements ...

within a multidisciplinary or agile delivery team, including coaching, mentoring, pairing, coordinating technical work and helping teams apply good engineering practices consistently. Ability to design, review and deliver systems with medium to high levels of technical or business complexity, ensuring appropriate technology choices, secure design, maintainability, performance, integration … adherence to modern standards Automated testing, CI/CD, reusable components, observability, secure development, API design, systems integration and continuous improvement of developer experience. The role is likely to suit someone who can operate confidently as the bridge between strategic technical direction and practical delivery within a squad. ...

customer moments where AI can create magic, prototype them, and bring them to life. Own delivery end-to-end. Pick up a problem, design the solution, ship the work wherever the feature lives, and see it through to production. Own on-call. Be on the rotation, and stand behind … just code. You measure your work by what changed for the customer, not the lines of code shipped. Production minded. Solid grasp of API design, observability, scaling, reliability, and security. Care about craft. Clean APIs, attention to detail, and how the system feels to work in. Comfortable ...

works with top tier global financial institutions and major tech companies to offer our client 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 our client by increasing … turnaround times. Designing and developing innovative new features that expand the functionality of our client'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 our client's platform. Diagnosing and resolving complex technical ...

Consultant) to join our Technology Delivery team. In this role, you'll combine deep expertise in AI/ML engineering and software development to design, build, and deploy advanced generative AI and agentic systems for leading financial services clients. You'll work hands-on across the full AI engineering … experience deploying LLMs and multi-modal AI models within enterprise or large-scale production environmentsStrong software engineering expertise in Python, including backend development, API design, and distributed systemsSolid understanding of scalable MLOps, observability, CI/CD practices, and cloud-native AI deployment architecturesExcellent communication, stakeholder management, and problem ...

financial services environment (e.g., asset management, hedge funds, investment banks)Strong working knowledge of Amazon Web Services (AWS) and cloud-native developmentExperience with RESTful API design and frameworks such as FastAPI, Flask, or DjangoProficient in working with relational databases (PostgreSQL, MySQL) and ORMs (e.g., SQLAlchemy)Familiarity with Docker ...

Java preferred, but not required)experience with Scala/Java preferred, but not required)Mobile Capability: Experience building or maintaining cross-platform Mobile AppsArchitecture & Design: Solid grasp of API design, web & mobile architecture, as well as good UX design. Communication: Clear, pragmatic communicator who collaborates well with ...