Senior Software Engineer (C# / JavaScript)

Full-time · Manchester (on-site onboarding, then hybrid) · £85,000/year Hi — I'm the founder of A1 Tech Deals. We're a UK tech retailer taking on Amazon on their own turf: better prices on the tech people actually want, a proper UK storefront, real cashback, and a curated set of suppliers behind the scenes instead of a faceless everything-store. Most of your week will be building. Your job is to get those problems straight from the people living them, work out what's actually worth building, and then build it end to end. If you like turning a vague "this is painful" into a shipped feature, it very much is. You're the first senior hire, so you'll also set the engineering bar — how we test, how we ship, what "good" looks like — and help me grow a team behind you. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ js / TypeScript) • Seller dashboard — where our sellers manage listings, orders and payouts (React + FastAPI) • Support dashboard — the tools our support team runs the business on (React + FastAPI) • Services — payment sync (Stripe, PayPal), fulfilment and tracking, search, the financial ledger, and whatever we need next It runs on PostgreSQL (Supabase) and deploys to Railway and Vercel. You're full-stack and mean it — equally at home in a FastAPI/Python backend and a React/TypeScript frontend. ✓ You're strong with SQL and Postgres — you can design a schema, write a safe migration, and reason about what a query (or a lock) does under load. ✓ We build with AI in the loop — Claude Code and tools like it are part of how we ship at the pace we do, and fluency with AI-assisted development is a real requirement here, not a nice-to-have. 85,000/year, full-time. • For the first few weeks you'll be in the office with me every day — that's how I'll get you properly up to speed on the platform and the business. After that it settles into 2 days a week in the Manchester office, 3 days remote. • It works on my machine" is where your responsibility ends. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ hiring #softwareengineer #fullstack #manchesterjobs #techjobs #startupjobs