176 to 200 of 509 Permanent API Design Jobs

Senior Full-Stack Engineer

Location
Greater London, England, United Kingdom
engineering hires. You will report directly to the CTO and work alongside a small group of senior engineers. The work as it is today Design, build and ship features end to end, from data model and API design through to frontend implementation. Design and build robust … ideally in TypeScript, Node.js and React. We are open to adjacent stacks where the fundamentals are strong. Substantial experience of system design and architecture, including systems that have been in production long enough to show their weaknesses. We will ask you to talk us through something you have designed ...

Product Manager

Hiring Organisation
Randstad Technologies
Location
Manchester, Lancashire, United Kingdom
Employment Type
Full-Time
Salary
£70.00 - £75.00 per hour
Lead Product Manager - API & Platforms Location: Manchester, UK, Only 1 or 2 days to office Role Overview We are looking for a Lead Product Manager to own and scale our core API platforms, backend microservices, and data tools. You will lead cross-functional engineering teams to build high … performance systems, improve developer experience, and integrate AI/data solutions across our global platform. Key Responsibilities Platform & API Strategy: Own the roadmap and backlog for core APIs and microservices, ensuring high availability, speed, and scalability. Technical & AI Execution: Work with engineers and data teams to design data ...

Back-end Engineer (Senior)

Location
Bracknell, England, United Kingdom
This Role We're hiring a senior back-end engineer who owns real problems end-to-end and shapes how the team builds, from API design and data modeling through to service implementation, production reliability, and launch. You already use AI as part of how you think, build … test, and ship. You'll write code that moves money in production, design and modernize the backend services the platform runs on, and lead delivery of new capability as Xe rebuilds its platform layer. You'll work in a small team with direct access to product, compliance, and operations ...

Software Engineering Manager

Location
Bristol, England, United Kingdom
flow metrics, communicating timelines, dependencies, and risks early and transparently. Establish engineering guardrails across scope, quality, and non-functional requirements, enabling teams to design optimal solutions within them. Champion observability and operational excellence, ensuring system health, SLOs, and alerting are visible and actively managed. Partner with Tech Leads … Architects on system design and evolution, bringing structured thinking to complex, distributed environments. Foster a culture of ownership, collaboration, and continuous improvement, helping teams navigate technical and product challenges with clarity and purpose. Grow and develop engineers through coaching, feedback, hiring, and creating an environment that supports autonomy, mastery ...

Senior Technical Architect

Location
City of Edinburgh, Scotland, United Kingdom
digital, data and AI. We believe in tailored solutions, assembling expert teams to address each client's unique needs. Our services span strategy, design, technology and data & AI, ensuring seamless end-to-end delivery of platforms, products and services with real-world impact. Role Overview Storm ID has delivered … architecture, and the underpinning service model and technical approach required to enable future phases. That architecture is documented in both a PoC High Level Design and Full-Service High-Level Design, supported by Architecture Decision Records. The next phase requires: one or more iterations of the Full Service ...

Software Engineer

Hiring Organisation
Hackajob Ltd
Location
Knutsford, Cheshire, North West, United Kingdom
Employment Type
Permanent
enterprise adoption. Contributing to event standards, patterns, and best practices, enabling teams across the organisation to build confidently on the platform. Making considered design choices that balance scalability, resilience, security, and developer experience. Close collaboration with product, architecture, and engineering teams to align platform capabilities with business and regulatory … deployment pipelines. Some other highly valued skills may include: Hands-on Java engineering experience, building high-quality, maintainable, and well-tested systems, including the design and delivery of distributed systems using event-driven and asynchronous communication patterns. Practical experience with microservices and API design, with a clear ...

Senior Kotlin Developer

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
using Kotlin and Javaon the AWS Cloud platform, following best practice. In addition to Kotlin, this project utilises Typescript/Node.js using the GOV.UK Design System.Kubernetes and Docker to schedule and run services hosted on AWS Cloud. You'll join a Scrum Team of cross-functional skills working … including microservices and message-driven architectures NFR/Non-Functional requirement understanding and experience developing applications with this in mind Application/Digital Services Design experience Experience in software engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role ...

Senior Software Engineer

Hiring Organisation
Clini-Hub
Location
Newcastle Upon Tyne, England, United Kingdom
will bring validated analytical workflows into robust production applications and help shape software used across testing and production settings. What you will do Design, build and operate production Python services and modern web applications on AWS. Take analytical workflows into production while preserving expected behaviour through disciplined testing. Build … data science to translate scientific and clinical requirements into software. Partner with cloud engineering on security, observability, performance and operational readiness. Produce clear requirements, design documentation and verification evidence for regulated development. Contribute to technical direction, code quality and product development engagement across the team. What you will bring ...

Hybrid API & Java Microservices Engineer - Spring Boot

Location
Leeds, England, United Kingdom
Yorkshire Building Society Group is seeking a Software Development Engineer for API & Microservices to design, develop and test Java Spring Boot microservices that support digital platforms in a hybrid Leeds/Bradford environment. You will work with API design, pipelines, and monitoring while collaborating with tech ...

Full-Stack Data Engineer

Location
Glasgow, Scotland, United Kingdom
seeking someone to join our Data Obfuscation team as a Full Stack Developer – Data Engineering to design and deliver scalable, secure, and reusable data platforms and services that support enterprise data protection and obfuscation initiatives. In the Technology division, we leverage innovation to build the connections and capabilities that … innovating to better serve our clients and our communities in more than 40 countries around the world. What you'll do in the role Design and develop resilient on-prem and multi-cloud database solutions with Java, Spring Boot, Angular, and Python Develop high-performance solutions that efficiently handle ...

Senior Product Engineer

Hiring Organisation
Zapp
Location
London, UK
Employment Type
Full-time
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 ...

Senior Software Engineer, Core AI Services

Location
Cambridge, England, United Kingdom
passionate Senior Software Engineer to join our Core AI Services team at the forefront of industrial AI Innovation. In this role, you will help design, develop, and scale AI-enabling platform services, agentic workflows, and public APIs that are secure, reliable, and cloud-native. These services will … passion for keeping up with the latest AI engineering patterns and practices, eager to translate emerging tech into reliable, enterprise-ready software. Key Responsibilities: Design, build, and maintain scalable, fault-tolerant cloud-native services on Microsoft Azure. Develop secure, well-documented public APIs and SDKs for consumption by internal ...

Software Engineer - Sr. Consultant level

Hiring Organisation
Visa
Location
Bellevue, Washington, United States
Employment Type
Permanent
Salary
USD Annual
wide risk platform that empowers employes to drive organizational and product improvements through collaborative idea sharing and the entire lifecycle from ideation to delivery. Design, implement, and enhance systems and shared technologies end-2-end that enable and improve Visa offerings which touch 40% of the world population while … building, deploying, and operating large scale, highly available, fault-tolerant, and elastic microservices in cloud-native environments. Proficiency in REST/GraphQL/gRPC API design, event-driven architectures, and message queues Familiarity with front-end development with React or Angular Experience building AI-powered product capabilities ...

Cloud Engineer

Hiring Organisation
Hackajob Ltd
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Part Time
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 ...

Java Developer

Hiring Organisation
Venkat Inc
Location
Atlanta, Georgia, United States
Employment Type
Permanent
Salary
USD Annual
designers, and other developers to deliver scalable and efficient software solutions. Your expertise will contribute to the full software development lifecycle, from concept and design to testing and deployment. You will be responsible for writing clean, maintainable code and ensuring the performance, quality, and responsiveness of applications. Ultimately, your … field. Proven experience as a Java Developer or similar role with a strong portfolio of completed projects. Solid understanding of object-oriented programming and design patterns. Proficiency in core Java technologies including Java SE and Java EE. Experience with relational databases and SQL. Familiarity with version control systems such ...

Principal Software Developer (Web)

Location
City Of London, England, United Kingdom
from an MVP to a comprehensive companion to the desktop application, as well as continuing the evolution of our Mobile app. Responsibilities Design & Build: Deliver robust, maintainable features across the stack (Scala/Play backend, React/AG-Grid frontend) Mobile Migration: Define the path from Codename … preferred, but not required)experience with Scala/Java preferred, but not required) Mobile Capability: Experience building or maintaining cross-platform Mobile Apps Architecture & Design: Solid grasp of API design, web & mobile architecture, as well as good UX design. Communication: Clear, pragmatic communicator who collaborates well with ...

Senior Java Developer (6 month contract)

Location
Belfast City District, Northern Ireland, United Kingdom
Greenfield build – no legacy codebase Cloud-native tech stack (Java, Spring Boot, AWS, GitHub Actions, Jenkins) Regulatory focus (MiFID II, EMIR, SFTR, etc.) Responsibilities Design and implement scalable, cloud-native backend components using Java and Spring Boot Collaborate with cross-functional teams to deliver features supporting transaction reporting … post-trade transparency, and venue/instrument data flows Translate regulatory requirements into robust, auditable technical solutions Participate in Agile ceremonies and contribute to design, development, testing, and documentation Write unit, integration, and functional tests; support automated test pipelines Deploy services in AWS and contribute to CI/ ...

Lead Software Engineer - Solution & Data Architecture - B2B SaaS Fintech

Location
Greater London, England, United Kingdom
well before any code gets written, with clear communication about the outcomes to be delivered, followed by planning, prototyping when it helps, and a design the team agrees on. As technical lead of an R&D team, you'll work closely with a Product Manager on initiatives, improvements … time. You plan, size and hand out the work, and keep the team unblocked while it ships. Security, scalability, availability and performance are design inputs on every initiative, not a hardening phase at the end. You cover tenant isolation, auth, data protection and auditability, because our clients' data ...

Mobile Security Engineer — RASP

Location
United Kingdom
binary hardening across Swift, C, C++ and Objective‐C. Own secure local storage, app/device attestation, and the applied cryptography that underpins them. Design, build and operate the Python backend services and APIs that turn on‐device threat signals into operational visibility. Work alongside DevOps … security teams. Translate product gaps and requirements into epics and user stories in Jira that the team can build. Use AI coding tools to design, prototype, build, test and document at high speed. Own the capabilities you build throughout their lifecycle, including security research, vendor upgrades and ongoing maintenance. ...

Context Plane Python Engineer

Location
Glasgow, Scotland, United Kingdom
hands‐on senior role with real architectural scope, active cross‐functional collaboration, and strong support for internal mobility and upskilling. Job responsibilities Design, build, and maintain backend services and data pipelines in Python that load firm knowledge into a knowledge graph and vector store Build and evolve the serving … firm, including enterprise AI and large language model gateways Own quality across your components: automated testing, code reviews, observability, and resilient, secure service design Partner with Corporate Technology AI, product, and data science colleagues to translate concrete use cases into working, measurable capabilities Contribute to design discussions ...

Senior Full Stack Robotics SWE

Location
Boston, England, United Kingdom
seamless user experience in demanding real-world environments. What You'll Be Doing Lead the architecture, development and deployment of a greenfield mobile application Design and build scalable cloud services to collect, process and manage structured and unstructured data Develop and maintain RESTful APIs and integrations across distributed systems … Build intuitive, high-performance user interfaces across mobile and web platforms Design data storage solutions, messaging infrastructure and backend services supporting real‐time and asynchronous workflows Establish best practices around software architecture, testing, CI/CD and system observability Mentor engineers through technical leadership, code reviews and collaborative development ...

Infrastructure Developer

Location
City Of London, England, United Kingdom
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 ...

Infrastructure Developer

Hiring Organisation
Ncounter
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£110,000 - £130,000 per annum
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 ...

Engineering Lead, Scale

Hiring Organisation
Airwallex
Location
London, UK
Employment Type
Full-time
foundational systems that power our embedded finance platform at global scale. The team owns multi-tenant infrastructure, drives cross-domain product capabilities, and helps design technical solutions for enterprise customers. Key areas of ownership include: Embedded Finance Platform: Build and maintain the infrastructure powering customers like Rippling, Navan, Qantas … career development. Set technical direction for scalable, reliable backend systems and partner with senior engineers on architecture and design. Ensure high standards for system design, code quality, testing, and operational excellence. Drive improvements across reliability, observability, security, and developer productivity. Work cross-functionally with product, design, compliance, sales ...

Principal Product Engineer

Location
Greater London, England, United Kingdom
SDLC towards a more agentic one, you will use AI-assisted tools to increase technical leverage, improve engineering workflows and raise the quality of design, code review, testing and documentation - always with rigorous human judgement. Key Responsibilities Technical Direction : Lead the backend technical effort, establish architectural direction, and guide … team through complex design choices, refactoring priorities and engineering trade-offs. NestJS Architecture : Design and evolve a clean, modular NestJS architecture with clear module boundaries, dependency management, testability and maintainable conventions. Typed APIs and Contracts : Design well-typed, version-aware APIs and integration contracts that are clear ...