Senior Software Engineer (Contract)
A three-month backend engagement at a UK home-services marketplace — a new contacts and leads service built from its first commit, and an AI voice receptionist extended to a second calling path.
Read moreA direct contract on InstaXchange, a platform for onboarding customers and managing crypto payments. The app was built in Next.js 14 with the App Router and React Server Components, on Prisma and Auth.js.
Key Contributions
- Payment flows — built the purchase flow, pay-with-balance and receipts
- Embeddable checkout — built an iframe version of the purchase flow with its own sign-in, so partners could embed it in their sites
- Identity verification — integrated Sumsub KYC through its web SDK and webhooks, with proof-of-income document upload during onboarding
Technical Stack
- Frontend: Next.js, React, TypeScript, TanStack Query, Tailwind CSS
- Backend: Next.js server components and route handlers, Prisma, Auth.js
- Integrations: Sumsub, Sentry
- Infrastructure: Docker, Dokku
Written by
Alinus Dumitrana
Other Jobs
Learn more about my experience.
Software Engineer (Contract)
Led the frontend of a public-sector risk-analysis platform — set it up from an empty repository and stayed its main contributor as the team grew to four.
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