Senior Backend Engineer (Core Team)

About the Role Playson is a globally recognised iGaming supplier delivering a high-performance, microservices-based platform designed to process billions of financial transactions every day. Built across multiple regions, our infrastructure is focused on one clear ambition - driving latency as close to zero as possible. We’re looking for a Senior Backend Developer who thrives in a deeply hands-on environment and enjoys being close to the code on a daily basis. This role is heavily focused on building, optimising, and scaling backend services in a high-load system where performance and reliability are critical. You’ll be working on complex, real-time challenges at the core of our platform - improving latency, ensuring high availability, and making systems more efficient at scale. This is not a coordination-heavy role; it’s for someone who enjoys writing production code, solving tough engineering problems, and seeing the direct impact of their work. If you’re product-driven, take ownership, and prefer a “build first, improve fast” approach while working on systems where every millisecond matters - this role will feel like home. Key Responsibilities Work as part of a cross-functional team owning a core product within the platform Design, build, and deliver new backend features end-to-end in a distributed environment Write high-quality, production-level code daily, contributing directly to a high-load, scalable system Take ownership of services handling financial transactions at scale, with a strong focus on reliability and accuracy Proactively suggest and implement improvements in architecture, processes, and development practices Participate in code and architectural reviews to maintain high engineering standards Solve complex business and technical challenges with pragmatic, efficient solutions Participating in on-call rotations within the squad to ensure the reliability and availability of our systems Play an active role in ongoing tech transformation initiatives across the platform Collaborate closely with engineers, product, and other stakeholders to deliver impactful solutions used by millions globally Requirements Solid experience with Node.js/TypeScript is ideal, but we also welcome experts in other OOP languages such as Java, Python, C++, C#, or Go. Strong understanding of asynchronous programming techniques Experience with distributed systems and messaging systems (Apache Kafka, gRPC) Knowledge of relational databases (MySQL, PostgreSQL), columnar databases (ClickHouse), and NoSQL technologies (DynamoDB, MongoDB) Skilled in developing and maintaining end-to-end and unit tests Proven track record of developing production-ready solutions Degree in Computer Science or related field Nice to Have Experience with large-scale microservices architecture. Good ground knowledge of Kubernetes Familiarity with cloud providers (especially AWS) Understanding of application security and industry best practices Understanding of enterprise development patterns Active performance observation Gambling domain experience What We Offer Competitive Salary: We offer a competitive salary, subject to annual performance reviews Quarterly Bonuses: Benefit from a transparent and systematic quarterly bonus system Unlimited Paid Vacation: Enjoy unlimited paid vacation leave, including Ukrainian bank holidays Unlimited Paid Sick Leave: Take unlimited paid sick leave whenever necessary Flexible Schedule: We offer a flexible work schedule to accommodate your needs Remote Work: Choose to work remotely, providing greater flexibility and comfort Medical Insurance: Receive comprehensive medical insurance for both you and a significant other Financial Support for Life Events: We provide financial support during special life events Professional Development: Get reimbursement for professional development courses and training International exposure : Attend industry expos, team gatherings & global meet-ups B2B contracts Recruitment process 1. HR interview (30-45mins) 2. Interview with a Product Owner (60mins) 3. Technical interview with live coding (90mins) 4. Final Interview with C-level (60 mins)