Mid-Level Full-Stack Engineer

Location: Remote | Level: Mid-Level Join Over99 — Build the Future of Crypto Gaming Over99 is one of the top 10 crypto casinos in the world and one of the fastest-growing in the world. We operate at the intersection of crypto, gaming, payments, and high-performance technology, serving a rapidly growing global player base. As we continue to scale, we are looking for a Mid-Level Full Stack Engineer (Backend-Leaning) to join our Core team and help build the technology powering one of the world's fastest growing crypto casinos. You'll work across backend services, APIs, real-time systems, databases, and interactive web experiences. This is a great opportunity for an engineer who enjoys solving challenging problems, taking ownership of their work, and developing their skills while working on a product operating at significant global scale. You'll have the opportunity to make a real impact from day one, working on systems where performance, reliability, and user experience genuinely matter. This is a fully remote role. We value autonomy, trust, and flexibility and expect you to bring curiosity, ownership, and a strong engineering mindset wherever you work. What You’ll Be Doing Build and maintain scalable backend services supporting player accounts, wallets, games, leaderboards, and other core platform featuresDevelop and optimize Node.js microservices and APIsWork with distributed systems and event-driven architecturesBuild and maintain real-time functionality using WebSockets, Pub/Sub, and messaging systemsDevelop performant and interactive web experiences using ReactWork with PostgreSQL and Redis to build reliable, high-performance data systemsCollaborate with product managers, designers, front-end engineers, and DevOps to deliver features from concept through to productionMonitor and improve the performance, reliability, and scalability of the systems you work onWrite clean, maintainable, well-tested codeContribute to code reviews and engineering best practicesHelp improve our CI/CD, testing, monitoring, and development processesInvestigate production issues and contribute to effective, long-term solutionsTake ownership of projects and features while working closely with more senior engineers on technical direction Technologies You’ll Work With Core Infrastructure ReactPixiJSNode.jsTypeScriptPostgreSQLRedisKafka What We’re Looking For Must-Haves 3–5+ years of professional software engineering experienceStrong experience with Node.js and backend developmentExperience building and maintaining APIs and backend servicesGood understanding of databases, ideally PostgreSQLExperience with React and modern front-end developmentFamiliarity with real-time systems such as WebSocketsUnderstanding of asynchronous and event-driven architecturesExperience working with CI/CD and modern development workflowsStrong understanding of software engineering fundamentalsAbility to write clean, maintainable, and well-tested codeA proactive mindset and willingness to take ownership of your workComfortable working independently while collaborating closely with a remote team Nice-to-Haves Experience in crypto or iGamingBackground in gaming, gambling, or iGaming platformsExperience with Redis, RabbitMQ, or other messaging systemsFamiliarity with game networking, animations, or interactive applicationsExperience with AWS or other cloud platformsExperience with Docker, Kubernetes, or ECSExperience with PixiJS or similar rendering/game frameworksExperience working with high-traffic or high-throughput platforms Why Join Over99? Work on a Product That’s Already Winning Over99 is already a top 10 crypto casino globally and one of the fastest-growing in the world. You'll be joining at an exciting point in our growth — with an established product, a rapidly expanding player base, and plenty of interesting technical challenges ahead. Build Technology at Scale Our platform handles real users, real-time interactions, and high-volume transactions around the clock. The engineering challenges are real and the work you do will directly impact a product used by players around the world. Grow With The Company As a mid-level engineer, you'll have the opportunity to work alongside experienced engineers, take increasing ownership, and develop your technical skills in a fast moving environment. We want people who are ambitious and want to grow with us. Make an Impact We keep teams lean and give engineers meaningful ownership. Your work won't disappear into a massive organization, you'll be able to see the direct impact of what you build. Remote by Design We're a remote first company built around trust, autonomy, and flexibility. We care about what you achieve, not where you work or how long you are online. What You’ll Get Competitive Salary: We pay competitively for great engineering talent Remote-First Work Environment: Work remotely and collaborate with a global team Generous Holiday Allowance: Take the time you need to rest and recharge Flexible Time Off & Hours: We focus on output and impact, not clocking in Performance-Related Bonus: Make an impact and share in the upside Ready to Build with Over99? If you're a mid-level engineer looking for your next challenge, want to work with modern technology, and are excited by the opportunity to build products at global scale, we'd love to hear from you. Join Over99 and help us build the next generation of crypto gaming.