Tech Lead/Senior Go Developer (Payments)

Location: Lisbon; Belgrade Workplace: OnSite Aghanim is an integrated commerce, liveops automation, community engagement, and payments platform for video games.   Mobile games have traditionally depended on app stores for distribution, payments, and player relationships. We believe there is a better way. Aghanim helps game studios build direct relationships with players, sell directly, and build their future on their own terms. Today, more than 100 games worldwide are already building this future with Aghanim.   Our team brings together people across Los Angeles, New York, Seoul, Beijing, London, Lisbon, Belgrade and other locations around the globe, with deep expertise in gaming, fintech and technology. We move quickly, keep communication direct, and focus on getting things done. We believe the best people thrive when they have autonomy, ownership, and a stake in the company's success. [https://app.ashbyhq.com/api/images/user-content/4f457f07-466b-477b-b552-fbbabd850111/2de3a7cd-8843-41a9-8bbe-ceb897a42c4a/Logo%20(horizontal).svg] We are looking for an experienced Tech Lead/Senior Go Developer to design and build reliable backend services for billing and payment processing systems. This role requires strong expertise in Go backend architecture and hands-on experience integrating with payment providers and financial infrastructure. You will work on systems responsible for payment processing, billing logic, provider integrations and transaction workflows, ensuring reliability, scalability and correctness of financial operations. KEY RESPONSIBILITIES - Design, build, and maintain backend services for billing, payments, and transaction processing - Integrate with external payment providers and financial APIs - Develop reliable transaction workflows, including retries, reconciliation, and failure handling - Ensure the scalability, reliability, and correctness of financial operations - Write maintainable, well-tested production code - Monitor, troubleshoot, and improve payment and transaction flows - Contribute to backend architecture and technical decision-making REQUIRED QUALIFICATIONS - 5+ years of backend development experience in Go, including concurrency and service architecture - Experience designing and operating high-availability production systems - Strong experience with billing, payments, or other transaction-heavy systems - Hands-on experience integrating payment providers or payment gateways - Experience with REST APIs, asynchronous processing, and event-driven architectures - Experience with PostgreSQL or similar relational databases - Strong understanding of transactional systems, consistency, and failure handling Important: Hands-on experience with payment or billing systems is required. PREFERRED QUALIFICATIONS - Experience with multiple payment providers and subscription billing systems - Experience operating high-load distributed systems - Experience with Kafka, RabbitMQ, or similar messaging platforms - Experience with observability tooling, including metrics, tracing, and logging WHY JOIN US - World-class team – work alongside experienced professionals from around the globe who have built products used by millions of players - High growth, high impact – be part of a fast-growing company where ideas turn into products and reach customers in days, not months - Autonomy and ownership – we trust people to make decisions, take initiative, and drive results - Modern tools and technology – use AI, automation, and modern tools as part of your everyday work - Equity – participate in the company's growth and long-term success