Payments Engineer

🕒 June 4

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over99

WebsiteLinkedInAll Job Openings

11 - 50 employees

💼 Consulting

📣 Marketing

🎮 Gaming

Consulting • Marketing • Gaming

over99 is a Berlin-based iGaming company that builds next-generation casino products, games, and player experiences. They develop innovative casino games, run marketing and affiliate programs, scale brands, and provide world-class player support and operations. With a focus on bold design, data-driven growth, and owning platforms, over99 aims to shape the future of digital entertainment in the iGaming space.

📋 Description

• 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 • Collaborate cross-functionally with product, risk/fraud, finance, and other engineers to ship end-to-end payment features • Contribute to best practices across code quality, testing, CI/CD, and deployment, and share payments domain knowledge with the team

🎯 Requirements

• 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

🏖️ Benefits

• Competitive Salary – We pay top-of-market for top-tier talent • Remote-First Work Environment – Work from anywhere, collaborate globally • Generous Holiday Allowance – Take the time you need to rest and recharge • Flexible Time Off & Hours – We focus on output, not clocking in • Performance-Related Bonus – We reward real impact. Hit goals, share the upside