edenity.
Senior Full Stack Engineer
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Interim Senior Fullstack Engineer (Lead) | Global EdTech Business
📍 London (hybrid, ~3 days on-site, West London) | 6-month contract with a genuine path to permanent | Reporting into the Director of Engineering & Technology
About the opportunity
A large, global EdTech business (25+ years in the space, operating internationally) is bringing in a senior fullstack engineer to steady and modernise the platform behind its e-commerce and learning products.
The honest version: there's a small, capable team of largely junior engineers shipping fast, a mix of legacy code and modern AWS deployments, and nobody senior with the bandwidth to own architecture. This role exists to fix that - to bring structure, take things past MVP, and be the person the team can bring problems to.
It's starting as an interim engagement so both sides can move quickly, with a clear intent to convert to permanent for the right person.
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What you'll actually be doing
- Acting as the senior technical voice across the stack - architecture decisions, code review, and untangling the things that keep breaking
- Hardening a complex back end: multiple generations of e-commerce and payment integrations (Adyen plus regional providers), Salesforce orchestration, and a layered Cloudflare/AWS setup
- Bringing engineering discipline to testing - QA is currently manual and a bottleneck, so you'll help shift towards automated and integrated testing
- Mentoring and unblocking junior developers day to day, raising the bar on how the team builds
- Working alongside Product and commercial stakeholders to sequence stability work against a busy roadmap, including AI-powered e-commerce projects
What we're looking for
- Senior fullstack engineer with genuine backend and DevOps depth - comfortable in AWS, CI/CD, and infrastructure, not just application code
- Experience inheriting legacy systems and improving them incrementally, without a two-year rewrite
- Track record of being the technical anchor for a junior team: reviewing, mentoring, setting standards
- Pragmatic about testing and reliability, and able to introduce automation where it earns its keep
- Comfortable with a flat, informal, low-ego, highly international culture; confidence without ego is a hard requirement
- London-based
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Why this role
You'd be the first senior engineer to properly own the technical foundations here, with a clear mandate from the top to stabilise and modernise rather than just keep shipping. Real autonomy, visible impact, and a permanent seat on the table if it's a fit both ways.
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