Payments Engineer, Remote

Over99, We’re redefining what’s possible in crypto gaming. Our mission is simple: deliver a lightning-fast, seamless, and secure gaming experience powered by cutting-edge blockchain technologies. We're building the most advanced crypto casino platform in the world—and we’re just getting started.


What you'll be doing:

🌸Integrate fiat payment methods (cards, bank transfers, e-wallets, local payment rails) through payment service providers, gateways, and aggregators
🌸Build and operate core money-handling flows: deposits, withdrawals, refunds, payouts, chargebacks, and settlement
🌸Design and develop ledger and balance-tracking systems that keep money movement accurate and auditable
🌸Guarantee transactional integrity across distributed systems — idempotency, consistency, exactly-once processing, and safe retries
🌸Handle PSP webhooks, callbacks, and asynchronous status updates, including reconciliation against provider records
🌸Build and optimize scalable, low-latency Node.js services supporting high-throughput transactional workloads
🌸Ensure the performance, reliability, and security of payment APIs

Must-Haves:

💦5+ years of professional backend software engineering experience
💦Hands-on experience integrating fiat payments, either through internal systems or via PSP/gateway APIs
💦Strong understanding of transactional correctness: idempotency, consistency, concurrency, and handling money safely under failure conditions
💦Proficiency with Node.js and building scalable back-end services
💦Experience with relational databases, ideally PostgreSQL
💦Solid grasp of distributed systems and client-server architecture
💦Experience with CI/CD pipelines and modern development workflows
💦A security- and reliability-first mindset

Why Join us?

☘️Be part of a fast-growing and well-funded start-up at the intersection of gaming and blockchain
☘️Work with a world-class engineering team—collaborative, autonomous, and impact-driven
☘️Build next-generation systems with full ownership over architecture and implementation
☘️Remote-first culture with flexible hours, asynchronous communication, and no micromanagement
☘️A product and mission you’ll actually be excited about

Apply

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