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.
You'll be developing systems that move real money. This role is focused on integrating fiat payment methods through service providers, building reliable deposit/withdrawal and payout flows, and making sure every transaction is correct, traceable, and secure.
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

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

Technologies You'll Work With
Core Infrastructure:
Node.js

TypeScript

PostgreSQL

Kafka

Redis

Bonus Skills (Nice to Have):
AWS

Cloudflare

Datadog

React

What We're Looking For
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

Nice-to-Have:
Background in crypto, fintech, or iGaming/gambling platforms

Experience with specific PSPs/gateways

Familiarity with reconciliation, settlement, and double-entry ledger design

Knowledge of PCI-DSS or other payments/financial compliance requirements

Exposure to open banking, multi-currency handling, or FX

Knowledge of cloud deployment (AWS) and containerized environments (Docker, ECS)

💥 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

Why join us?
💸 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

Ready to Build with Us?
We’re creating something bold and different—and we want the best minds to help us do it. If you're passionate about infrastructure, performance, and pushing tech boundaries, apply now and let’s build the future of crypto gaming together.