101 to 125 of 453 API Design Jobs

Senior Fullstack Developer — Java or Kotlin, React and TypeScript

Location
Manchester, England, United Kingdom
maintain high standards of engineering quality.**How you will make an impact*** Build and maintain reliable JVM-based services using Kotlin or modern Java.* Design and develop well-structured APIs and integrations.* Build reusable services, APIs and components that enable other teams to deliver consistently and reduce duplication.* Contribute … API design standards, documentation and versioning across services.* Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.* Use appropriate test-first and test-informed practices to create effective automated tests.* Experiment with AI-assisted engineering tools where they provide clear ...

Senior Fullstack Developer — Java or Kotlin, React and TypeScript

Location
Greater London, England, United Kingdom
maintain high standards of engineering quality.**How you will make an impact*** Build and maintain reliable JVM-based services using Kotlin or modern Java.* Design and develop well-structured APIs and integrations.* Build reusable services, APIs and components that enable other teams to deliver consistently and reduce duplication.* Contribute … API design standards, documentation and versioning across services.* Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.* Use appropriate test-first and test-informed practices to create effective automated tests.* Experiment with AI-assisted engineering tools where they provide clear ...

Software Engineer III - Full Stack React/Java - Risk Frameworks

Location
Glasgow, Scotland, United Kingdom
engineers, influence technical direction, and make a meaningful impact at one of the world's leading financial institutions. Job responsibilities Execute software solutions across design, development, and technical troubleshooting, thinking beyond conventional approaches to break down complex problems and build scalable solutions Create secure, high-quality production code … maintain algorithms that run synchronously with appropriate systems Produce architecture and design artifacts for complex applications, ensuring design constraints are met throughout the software development lifecycle Build and maintain full-stack features in close partnership with product and design teams to deliver high-quality, accessible user experiences ...

Senior Software Engineer - (Java, NodeJS, AWS, Python)

Location
Leeds, England, United Kingdom
taking pride in delivering software that makes a real business impact. What You'll Do As a Senior Backend Java Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem. Lead technical design and architectural discussions, ensuring solutions … Lambdas and Optional Spring Boot and the wider Spring ecosystem Python NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Senior Software Engineer - (Java, NodeJS, AWS, Python)

Location
City of Edinburgh, Scotland, United Kingdom
taking pride in delivering software that makes a real business impact. What You'll Do As a Senior Backend Java Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem. Lead technical design and architectural discussions, ensuring solutions … Lambdas and Optional Spring Boot and the wider Spring ecosystem Python NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Senior Software Engineer - Java, Node.js & AWS

Location
Leeds, England, United Kingdom
pride in delivering software that makes a real business impact. What You'll Do As a Senior Software Engineer - Java, Node.js & AWS, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java, Node.js and the Spring ecosystem. Lead technical design and architectural discussions … Streams, Lambdas and Optional Spring Boot and the wider Spring ecosystem NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Senior Software Engineer - Java, Node.js & AWS

Location
Manchester, England, United Kingdom
pride in delivering software that makes a real business impact. What You'll Do As a Senior Software Engineer - Java, Node.js & AWS, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java, Node.js and the Spring ecosystem. Lead technical design and architectural discussions … Streams, Lambdas and Optional Spring Boot and the wider Spring ecosystem NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Senior Software Engineer - Java, Node.js & AWS

Location
Greater London, England, United Kingdom
pride in delivering software that makes a real business impact. What You'll Do As a Senior Software Engineer - Java, Node.js & AWS, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java, Node.js and the Spring ecosystem. Lead technical design and architectural discussions … Streams, Lambdas and Optional Spring Boot and the wider Spring ecosystem NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Senior Software Engineer - Java, Node.js & AWS

Location
City of Edinburgh, Scotland, United Kingdom
pride in delivering software that makes a real business impact. What You'll Do As a Senior Software Engineer - Java, Node.js & AWS, you will: Design, build and maintain scalable, secure and resilient backend systems using modern Java, Node.js and the Spring ecosystem. Lead technical design and architectural discussions … Streams, Lambdas and Optional Spring Boot and the wider Spring ecosystem NodeJS Spring Data JPA/Hibernate Spring Security including OAuth2 and JWT REST API design and implementation Microservices and distributed system design SQL databases with strong query optimisation skills NoSQL databases Messaging technologies such as Kafka ...

Sr Partner Agent Architect (UK)

Location
Greater London, England, United Kingdom
Architect at Parloa, you will operate at the intersection of enterprise solution architecture, conversational AI, and partner enablement, helping strategic partners and enterprise customers design, implement, and scale AI-driven customer experiences.This is a highly consultative, customer-facing role where you will guide partners and clients through solution discovery … solution architecture, enterprise integration design, conversational architecture, and implementation strategy for enterprise AI Agents. You will design how Parloa’s platform integrates into complex enterprise environments, solve multi-system integration challenges, and apply systems thinking to build reliable, scalable AI solutions.While you bring strong technical depth ...

Senior Python Developer

Hiring Organisation
Tech 4
Location
City of London, London, United Kingdom
Employment Type
Permanent
play a key part in driving the adoption of AI across engineering, leveraging emerging technologies and embedding AI-native workflows to improve how they design, build, and deliver software. This role is predominantly hands-on, with around 2030% of time on technical leadership: architecture, mentoring, and shaping … generated code to our standards for security, reliability, and cost-efficiency (FinOps). These are first-class concerns in agentic pipelines, not afterthoughts. Design, build, and operate software across our platform, applying the same rigour to AI-augmented work as to anything else you ship. Embed deeply with Product ...

Technical Architect

Location
Greater London, England, United Kingdom
Spring Boot background to support customer‐specific delivery workstreams and wider digital transformation projects. The role requires hands‐on architecture experience across modern service design, integration, cloud‐hosted platforms and delivery governance. The successful candidate will help shape robust, maintainable and scalable services, working closely with engineering teams, delivery … Boot services and supporting platform components. Produce high‐quality architecture artefacts including HLDs, LLDs, roadmaps, integration patterns, sequence diagrams and data models. Lead technical design governance, ensuring alignment with enterprise architecture principles, GDS Service Standard and delivery best practice. Provide technical assurance across delivery teams, suppliers and stakeholders. ...

Senior Fullstack Engineer (Java/React/Python)

Location
Leeds, England, United Kingdom
enjoy solving complex problems, challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact. What You'll Do Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem, alongside rich, responsive frontends built with React. Lead … technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned with best practices across the stack. Develop and evolve RESTful APIs with a focus on security, versioning, performance and reliability. Build intuitive, high-performance user interfaces in React that integrate seamlessly with backend services. Champion engineering excellence ...

Senior Fullstack Engineer (Java/React/Python)

Location
Manchester, England, United Kingdom
enjoy solving complex problems, challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact. What You'll Do Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem, alongside rich, responsive frontends built with React. Lead … technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned with best practices across the stack. Develop and evolve RESTful APIs with a focus on security, versioning, performance and reliability. Build intuitive, high-performance user interfaces in React that integrate seamlessly with backend services. Champion engineering excellence ...

Senior Fullstack Engineer (Java/React/Python)

Location
Greater London, England, United Kingdom
enjoy solving complex problems, challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact. What You'll Do Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem, alongside rich, responsive frontends built with React. Lead … technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned with best practices across the stack. Develop and evolve RESTful APIs with a focus on security, versioning, performance and reliability. Build intuitive, high-performance user interfaces in React that integrate seamlessly with backend services. Champion engineering excellence ...

Senior Fullstack Engineer (Java/React/Python)

Location
City of Edinburgh, Scotland, United Kingdom
enjoy solving complex problems, challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact. What You'll Do Design, build and maintain scalable, secure and resilient backend systems using modern Java and the Spring ecosystem, alongside rich, responsive frontends built with React. Lead … technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned with best practices across the stack. Develop and evolve RESTful APIs with a focus on security, versioning, performance and reliability. Build intuitive, high-performance user interfaces in React that integrate seamlessly with backend services. Champion engineering excellence ...

Senior Full Stack Developer

Location
Leeds, England, United Kingdom
Overview Senior Full Stack Developer role in Leeds. Hybrid work arrangement with two days in the office each week. You will design, build, and deliver high-quality solutions across the full technology stack in a cloud-native environment, collaborating with Product, Delivery, and Platform teams to enable secure, scalable … user-focused applications. Responsibilities Design, develop, and maintain scalable full-stack applications across the front end, back end, APIs, and data integrations. Lead the end-to-end delivery of features from technical design and architecture through development, testing, and deployment. Produce clean, maintainable, and well-tested code following ...

Senior Software Engineer | API Enterprise

Location
Greater London, England, United Kingdom
NVIDIA DGX SuperPODs to delivering real-time Language AI to over 300 million users and 200,000+ businesses globally. You will join the API Enterprise team. We sit at the intersection of DeepL's API platform and our Enterprise ecosystem. Whereas the Core team obsesses over the self … that enterprise IT and security teams depend on. We work hand-in-hand with a wide set of stakeholder teams to make DeepL's API the obvious and safe choice for global enterprises. We are shifting gears. We are moving from "Software-First" to "Product-First. ...

Lead Software Engineer

Location
Manchester, England, United Kingdom
scalable and future-proof Designing and developing secure, high-performance APIs and integrating third-party tools and services Producing and reviewing detailed Solution Design documentation, ensuring consideration of security, performance, and system-wide impact Driving high standards through code reviews, mentoring engineers, and contributing to CI/… some of the following skills: Strong experience with TypeScript, Node.js, and modern frontend frameworks such as React or Angular Deep understanding of software architecture, design patterns, and API design principles Experience working with CI/CD pipelines, automated testing frameworks (e.g. Jest, Playwright), and version control Proven ...

Ui Full Stack Developer

Hiring Organisation
Knackhook
Location
Santa Clara, California, United States
Employment Type
Any
Salary
USD Annual
Full Stack Developer to our Direct Client in Santa Clara, CA. The ideal candidate will have strong expertise in Node.js, React, Microservices architecture, and API development. Job Requirements Design, develop, test, and maintain full-stack applications using React and Node.js. Build and enhance scalable microservices and RESTful APIs … following modern engineering standards. Design and implement secure, well-documented APIs for internal and external consumers. Develop cloud-native, event-driven architectures supporting high-scale applications. Collaborate with product management and UX teams to translate business requirements into technical solutions. Participate in architecture reviews, code reviews, and engineering best ...

PHP/SQL Web Developer

Location
Cambridge, England, United Kingdom
MYSQL and large datasets (100GB+). Working knowledge of at least one modern backend language (php8, nodejs, Python, etc.). Understanding of OOP design, Microservice, API design and the necessity of constant refactoring and testing. Experience of a modern web framework e.g. symfony, laravel, Django etc. Knowledge ...

Senior Engineer - Payments

Location
Greater London, England, United Kingdom
development of our next-generation platform channels. Partner on the delivery of new products while continuously maintaining and improving existing ones. Architecture & Design: Collaborate with team members and engineering leaders to design new services and components utilizing our internal Request for Comments (RFC) process. End-to-End Ownership … Micro Frontends (MFEs) is a major plus. DevOps & Cloud: Hands-on experience with Docker, Kubernetes, Terraform, and AWS. Foundations: Strong understanding of system architecture, API design, scalable service integration, Linux systems, and Git version control. Core Soft Skills: Strong knowledge of basic algorithms, object-oriented/functional design ...

Senior Backend Engineer - UK

Location
Greater London, England, United Kingdom
startup with experience building SaaS products. You will also have a deep understanding of the key challenges engineers face and a firm grasp on design principles in prioritizing key features and capabilities. Your superpower is how to bridge the gap between technical specifics and business needs effortlessly and turn … engineering mastermind behind Heidi developing AI products which will change the face of healthcare Autonomously deliver beautiful & robust code with considerations on code structure design and scalability. Implement and optimize data storage solutions. Design, build, and maintain high-performance backend systems using Python. Architect and manage cloud infrastructure ...

Senior Software Engineer (Cloud)

Location
Greater London, England, United Kingdom
will develop our suite of security-focused cloud services and infrastructure. You’ll have the opportunity to learn, grow, and directly contribute to the design and implementation of scalable, reliable, and secure systems. You’ll collaborate closely with the rest of our engineering team to design APIs, build … with our embedded platform. This position is ideal for a mid-level or senior engineer who is looking for an opportunity to own the design and execution of new products. Key Responsibilities Design, build, and maintain cloud infrastructure and cloud-based services and APIs to support the functionality ...

Senior Software Engineer

Location
Greater London, England, United Kingdom
React Native and Expo application, the Python and FastAPI backend service, the Terraform infrastructure, and the Argo CD and Helm deployment configuration. You'll design, build, deploy, and operate the next generation of Cloudbeds' point-of-sale experience for hospitality properties, covering staff and device access, floor and table … ownership, thoughtful architecture, direct customer impact, and engineers who are comfortable working across multiple layers of the stack. What You Bring to the Team Design, build, and operate customer‐facing POS experiences across React Native, Expo, TypeScript, and Python services, with a strong focus on usability and reliability Develop ...