Senior Web Application Developer jobs in Windsor, Berkshire

Most “web developers” can’t do this job. Why? Because most have only ever built sites using templates WordPress themes, Shopify stores, Wix layouts. But Bounce? We didn’t touch any of that. Every single line of code was written from scratch. The backend, the frontend, the pages all bespoke. We’ve built a fully custom third-party ticketing platform to compete with Eventbrite, Dice, and...

You will play a crucial role in designing and implementing scalable, efficient integration solutions using a range of data formats and technologies, including XML, JSON, and CSV. As an expert in XML tooling, XSLT, and data transformation, you will be responsible for ensuring data accuracy, performing complex transformations, and supporting integration and migration processes.

Please note: applications via EasyApply will not be considered. To apply, email your CV & portfolio to careers@tefl.org Department: Technology Reports to: Head of IT / Managing Director Location: Remote (UK-based) Contract: Full-time, Permanent About Us The TEFL Org is the leading provider of accredited TEFL (Teaching English as a Foreign Language) certification courses. With a global...

Role’s Responsibilities - Design, develop, and maintain end-to-end web applications using Python, JavaScript (Node.js/React), and MongoDB. - Build and deploy microservice-based architectures aligned with 12-Factor App principles, ensuring scalability, maintainability, and resilience. - Collaborate with product managers, designers, and other engineers to translate business requirements into...

JOB DESCRIPTION Duration: 6 months Job Type: Hybrid Job Description - Work within our highly technically diverse multidisciplinary teams (application software, embedded, cloud platform, etc.) - Contribute to the core application software by developing enhancements for our existing intra-operative devices, taking ownership of the maintainability and reliability of the application software in...

Application Development Manager - MS dynamics 365, Power Platform Remote with occasional travel £65,000 - £74,000 + exceptional pension + package Fruition are recruiting an Applications Development Manager for a tech for good organisation who make a genuinely positive impact on people's lives. This role will play a key role at a crucial time for the organisation as they invest in their IT...

PowerApps Developer / Application Developer London (Hybrid) Our Client is a globally recognised, successful bank who provide world-class services to various institutions and individuals. Offering a comprehensive range of retail and corporate financial services/products, this thriving business boasts over 10 million active customers in over 700 business locations. Due to business requirements,...

The Senior Schneider Applications Engineer will take a lead role in the engineering, development, and delivery of Schneider BMS software and graphics, supporting multiple projects across the business. The successful candidate will also mentor and train our in-house applications team as they continue to develop their Schneider expertise. This hybrid role offers flexibility to work from home and...

About the Role We’re looking for a hands-on Application Support Engineer to join our tech team at a digital asset firm. You’ll support high-performance trading and data systems, troubleshoot issues, collaborate with developers, and improve operational processes. This is a hands-on role that allows you to dig deep, including at the code level. Key Responsibilities - Monitor and manage...

Ready for a challenge? Then Just Eat Takeaway might be the place for you. We’re a leading global online delivery platform, and our vision is to empower everyday convenience. Whether it’s a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery and convenience partners across...

Senior Full Stack Developer Contract type: Full time, permanent Salary: £DOE Reports to: Head of Product Engineering Direct reports: Yes (initially none, growing over time) Location: Remote-first with occasional travel to client sites or team meet-ups (typically quarterly) The successful candidate must hold British Citizenship, due to the requirement for Security Clearance. About...

We’re working with a leading global insurer seeking an experienced Lead Development Specialist to join their technology team. This role is ideal for a senior developer who thrives on building modern insurance technology solutions and providing hands-on technical leadership. As a Lead Development Specialist, you’ll be instrumental in designing, developing, and supporting core applications used...

We are seeking a senior, creative Front End Developer (UI/UX Developer) to join a client in The City of London. This role will focus primarily on UI/UX design and development (60%) while also contributing to backend and full-stack solutions (40%). The successful candidate will work closely with business stakeholders and developers in a small Agile team, contributing to both greenfield projects...

You will be responsible for the end-to-end design, development, and delivery of a critical, high-scale digital service. Leveraging your expertise across the full technology stack, you will build robust solutions that meet stringent standards for security, performance, and reliability.

Senior Java Developer - Hybrid (Outside IR35) We are looking to hire a hands-on Senior Java Developer to join our UK&I Technology team. In this role you will design, build, deploy software that is used at the forefront of the television broadcasting industry, that reaches millions of customers worldwide. As a Senior Java Developer you will: - Drive the development and maintenance of...

You will work with the UI/UX designer and bridge the gap between graphical design and technical implementation. You are expected to take an active role on both sides and define how the application looks and how it works.

Senior Software Developer – Python/Ruby Location: London (2/3 days per week on-site) Rate: Up to £650/day (Inside IR35 – 12-month Contract) A major UK government department is seeking an experienced Senior Software Developer to play a key role in the redevelopment of a critical national open data platform. This is a high-impact opportunity to work on services that directly improve access to...

A leading UK-based firm is seeking a proactive and commercially minded Senior Business Development Executive to join its dynamic and forward-thinking Business Development and Marketing Operations team. This is a fantastic opportunity to contribute to the strategic growth of one of the UK’s largest and most respected Real Estate divisions. Working closely with the Real Estate Business Development...

We’re looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. In this role, you’ll be responsible for: - Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis - Proactively maintaining and...

Job Description My client is looking for a Senior Schneider Applications Engineer. Engineer Schneider BMS software packages, ensuring quality, consistency, and compliance with project specifications. Develop Schneider BMS graphics packages, creating intuitive, user-friendly interfaces aligned with client requirements. Support and mentor other members of the applications team as they learn and...