Backend Software Engineer

About Prograd

Prograd is a rewards app with over 1m users across the UK and the US. We connect users with game and app offers, track every conversion, reward users fairly for engaging with our product. Tracking accuracy and fraud prevention are what make the business work, so backend engineering sits at the centre of the company.

What you will work on

• Postback infrastructure: server-to-server (S2S) postbacks at high volume, with deduplication, idempotency, and signature verification so every conversion counts once.

• Attribution: integrating mobile measurement partners (AppsFlyer and similar), reconciling attribution data, and handling iOS constraints like SKAdNetwork.

• Reward ledger: accurate, auditable user crediting, reconciliation against advertiser revenue, and reversal and clawback handling.

• Fraud and anti-abuse at the network level: this is a major part of the role. IP intelligence at sign-up, VPN, proxy, and residential-proxy detection at the session level, device fingerprinting, and geo and timezone validation, combined into the server-side rules that decide whether a reward is eligible. Protecting payouts from spoofed geo, multi-accounting, and manipulated postbacks.

• Integrations: offerwalls, ad networks, and affiliate platforms, plus Clerk, Resend, Onfido, and HubSpot.

• APIs and systems: GraphQL and REST APIs and the backend services behind them.

Stack

Node.js, TypeScript, JavaScript, with React and Next.js. PostgreSQL and Prisma over SQL. AWS. Event-driven architecture with Inngest. Microservices and monorepos with Turborepo. OAuth and SSO. Automated testing and CI/CD throughout.

How we work

We build with AI tooling every day and move at the speed it makes possible. Speed is the priority right now. We need engineers who use AI to multiply their output, ship fast, and hold quality high while they do it.

Background we want

Strong preference for engineers from adtech, performance or affiliate marketing, iGaming or rewards and get-paid-to (GPT) platforms. If you have worked with CPA, CPI, or CPL models and tracking-driven revenue, you will fit fast.

What you get

• Fully remote from day one.

• Equity that builds over time.

• A fast-growing company with real room to grow, including title and salary increases as you scale with us.

• High ownership and direct impact on the P&L from the start.

Who you are

You ship independently, learn quickly, think commercially about how your work affects margin, and explain technical concepts clearly to non-technical teammates. High standards and strong attention to detail.