9 senior api developer jobs found

Senior WordPress Developer needed for our FMCG client in Glasgow for an initial 6-Week contract . The right candidate must have extensive demonstrable experience in WordPress & PHP with deep knowledge of the WordPress core engine , strong API integration expertise , and a proven ability to deliver secure, scalable, and high-performance solutions. This role is Outside IR35 and the majority of the time can be worked remotely , though there is a requirement for an initial two days onsite in Glasgow for workshops. Responsibilities will include developing, maintaining & optimising custom themes, plugins & features using modern, scalable, secure WordPress practices and designing & implementing integrations between WordPress and external systems using REST APIs, webhooks, SDKs, and Middleware. The right candidate must be a self-starter who can independently run WordPress audits, optimise performance and work closely with business stakeholders to prioritise...

Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven We have a great opportunity for a Mid-Level .NET / Full Stack Developer to join a growing payments company. As a .NET Developer , you’ll be working as part of an experienced engineering team building and scaling a high-throughput payments platform. The business is entering its next phase of growth, launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be contributing to a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on development role where you’ll work closely with senior engineers to deliver reliable, scalable...

UI Developer (React) – Contract (Outside IR35) £450/day 3-month initial Hybrid (West Midlands) North Scout are recruiting a UI Developer for a large UK insurance organisation, working on a major internal digital platform used across multiple business units. This is a UI-led Front-End role focused on building robust, scalable user interfaces for complex, high-volume systems. It’s not a greenfield toy app – it’s proper enterprise engineering. You’ll be joining a small, senior product team and will have real ownership over front-end standards, component design, and UI quality across the platform. The Role This is a hands-on UI Developer position, working in a close-knit delivery team, while collaborating with multiple engineering, data, and product teams across the organisation. You’ll be responsible for building reusable UI components, improving front-end architecture, and ensuring the platform remains maintainable as it scales. This suits someone who’s...

About the Company A fintech company based in London is looking for a Senior Python Developer on an initial 3-month contract, with potential to extend. About the Role This is a sole-contributor role; you'll be the only developer on the project, so the ability to move fast and make good independent decisions is essential. The client is open to fully remote working, with monthly visits to the Hammersmith office when required. Responsibilities Building and delivering a Python based project end-to-end, working independently with minimal oversight. Integrating with exchange APIs and external data sources. Leveraging AI tooling, specifically Claude Code, to accelerate delivery and maintain quality as a team of one. Qualifications Must-haves Python 3.10+ with strong professional experience. Proven ability to work independently and deliver at pace, this is a sole-contributor engagement. Experience integrating with exchange or trading APIs....

React Developer Remote with very occasional client visits £400pd to £420pd - Outside IR35 3 - 6 month contract Our client, an established and successful Consultancy are looking for a number of mid-level Developers to join them on a contract basis With head offices in the north of the UK and branches spreading across the globe, they're a dynamic technology consultancy leader with a dedicated team of professionals, partnering with sector leaders After recently winning a large public sector project they are creating a whole new team and need people who are able to start no later than March 16th. This is a fully hands on role where you will work as part of an established successful team, primarily working with React and Typescript technologies We are looking for: Expert knowledge of React Strong proficiency in JavaScript (ES6+), HTML5, CSS3, and responsive UI engineering. Experience with Redux or other state management libraries. Strong understanding of Front End...

D365 Business Central Functional Consultant / Solution Architect (eCommerce & Retail) Location: Manchester (Hybrid) Contract: Short Term Start: ASAP IR35: Outside Overview Client in the eCommerce & Retail sector requires a D365 Business Central Functional Consultant / Solution Architect to lead functional design and produce a full functional specification for upcoming changes and integrations. Key Responsibilities Lead functional discovery across eCommerce, Retail Ops, Finance, Warehousing Review current BC setup and identify gaps Own the Functional Design Document (FDD) Produce a full Functional Specification for development Document integrations (eCommerce platform, payment gateways, WMS/3PL, Power Platform) Map end to end processes: order-to-cash, stock, fulfilment, returns, finance posting Create user stories, acceptance criteria, process maps, test scenarios Work with stakeholders to validate requirements Support handover...

Overview We are seeking a Senior Python Developer to support a large-scale digital transformation programme. The role focuses on building reliable Back End services, improving system performance, and contributing to a modern, scalable engineering environment. The client is open to strong EU-based talent. Role Detail: Contract Length: 3-6 months Rate: £250-400/day Outside IR35 (Depending on experience) Work Model: Fully Remote Key Skills and Experience Strong commercial experience with Python (Django) Solid understanding of REST APIs , microservices, and Back End architecture. Experience with cloud environments (AWS & Azure). Familiarity with CI/CD pipelines and modern DevOps practices. Strong understanding of relational and/or PostgreSQL. Ability to work in distributed teams and communicate clearly. Experience with Typescript and Svelte Good problem-solving skills and attention to detail. Nice to Have Experience with containerisation (Docker,...

Technical Lead - .NET / React (Azure) - Public Sector - Outside IR35 Contract Duration: 12 months Day Rate: Up to £475/day Location: Mostly remote (occasional office visit) Harvey Nash's Public Sector Client have a requirement for an experienced Technical Lead to support the development and evolution of a large-scale Azure-hosted platform built with .NET and React. The system is a business-critical application with a legacy MVC foundation, alongside modern cloud components including Azure Functions, APIs, and modern React frontends. This role requires someone comfortable operating in a brownfield environment, balancing feature delivery with gradual architectural improvement and reduction of technical debt. You will provide technical leadership to a team of 7 developers, while remaining hands-on with development (roughly 60/40 technical leadership vs coding). Key Tech .NET 8 ASP.NET MVC (legacy components) React + TypeScript Azure (App Services, Functions,...

Technical Lead - .NET/React (Azure) - Public Sector - Outside IR35 Contract Duration: 12 months Day Rate: Up to £475/day Location: Mostly remote (occasional office visit) Harvey Nash's Public Sector Client have a requirement for an experienced Technical Lead to support the development and evolution of a large-scale Azure-hosted platform built with .NET and React. The system is a business-critical application with a Legacy MVC foundation, alongside modern cloud components including Azure Functions, APIs, and modern React frontends. This role requires someone comfortable operating in a brownfield environment, balancing feature delivery with gradual architectural improvement and reduction of technical debt. You will provide technical leadership to a team of 7 developers, while remaining hands-on with development (roughly 60/40 technical leadership vs coding). Key Tech .NET 8 ASP.NET MVC (Legacy components) React + TypeScript Azure (App Services, Functions,...