Senior Web Application Developer jobs in Stevenage

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...

Senior Solution Architect – Digital (Web & App) Join a team that’s shaping the future of one of the UK’s most iconic digital brands. This is your chance to help redefine a major national platform — creating secure, scalable, and cutting-edge digital experiences used by millions every week. Role Overview - Location: Hybrid (Hertfordshire) - Package: £100,000 - £110,000 + Benefits - Industry:...

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...

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...

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...

You will have the opportunity to work on various modern web applications across a variety of platforms focusing on the backend. Should you choose, this role will allow you to expand your leadership capabilities as you progress in the company. The team tend to go into the Oxford office once a month.

🚀 About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‑first, often highly complex software. Our engineers pair forward‑thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‑standing third‑party clients, we’re scaling our own SaaS...

Senior Full-Stack Web Developer | Legal EdTech | Remote Join a leading EdTech provider delivering innovative online learning as they embark on a major transformation. As a Senior Full-Stack Web Developer, you’ll design, build, and modernise scalable web applications that power our learning management systems. You’ll work across ASP.NET Core, React, C#, JavaScript, and Azure. What you’ll do: -...

Senior Full Stack Developer – SaaS / Field Service Platform Salary: £60,000–£70,000 Location: Ireland or UK (preferably NI or Leeds area) Work pattern: Fully flexible hybrid (remote-friendly) Our client is a homegrown SaaS success story – a multi-award-winning software company developing a powerful field service management platform used by mobile workforces across the UK and Ireland. Their...

Senior Frontend Engineer – Up to 70k – Manchester/Remote – Automotive SaaS ECOM have teamed up with a tech company that build products for the automotive industry in a truly unique way, and they are looking for a Senior Frontend Engineer to craft stunning user experiences and bring a higher level of engineering practises to an already highly performing team. If you're passionate about...

Excellent opportunity for Front-End Developer looking to join a forward-thinking company producing award-winning software used by leading businesses across the globe. The successful Senior Frond Developer will need to have extensive commercial experience using ReactJS and should be comfortable working to their own initiative but also happy to mentor and offer guidance to the more junior members...

We’re looking for an Application Support Engineer to join a fast-paced tech environment where reliability, automation, and performance are everything. You’ll play a key role in maintaining and improving a complex application landscape that powers mission-critical services — ensuring uptime, scalability, and compliance at all times. This role suits someone who thrives in a mixed systems...

Senior Thingworx Developer Can be based anywhere in the UK - £54,000 + excellent benefits My client is growing their PLM development team and looking for an experienced Thingworx Developer to design and enhance digital tools that connect engineering, data, and manufacturing across their business. You’ll: - Develop dashboards, interfaces, and database integrations - Build and support RESTful /...

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...

Would you like to join a cyber security SaaS company at the forefront of vulnerability scanning and security research? Do you have experience in a software support role for a SaaS or digital product company, along with strong experience web app and infrastructure technologies? If so, please read on and apply. About AppCheck: AppCheck develops information security software for its end-user...

Job Description Your new company Join a purpose-driven organisation at the heart of a thriving community, where technology is being harnessed to transform lives. This values-led public sector organisation is embarking on a bold digital transformation journey, with a clear mission to deliver outstanding services to end-users through innovation and excellence. With a strong commitment to social...

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.