Senior Backend Developer (PHP)

Senior Backend Developer (PHP) at Playkot. Remote/full-time. High-load game backend (~100k DAU): PHP, MongoDB, Redis, AWS, jRPC, JSON Schema. Salary based on interview.

Backend Development: - Develop and maintain backend services using PHP. - Work with a high-load production system (~100k DAU). - Extend and support a monolithic backend architecture, improving stability and scalability. Architecture & APIs: - Design, implement, and maintain APIs and internal service interactions. - Work with API contracts based on JSON Schema. - Use jRPC for internal communication between system components. Infrastructure & Data: - Work with MongoDB, Redis, AWS, and Centrifugo. - Optimize data storage, caching strategies, and background processes. - Ensure system reliability under real production load. Performance & Monitoring: - Analyze system performance using Grafana and other monitoring tools. - Identify bottlenecks, degradation points, and inefficiencies. - Optimize queries, caching layers, and heavy backend flows.

Required Qualifications: - Strong commercial experience with PHP backend development (5+ years). - Experience in GameDev or other high-load backend systems. - Solid understanding of OOP and software design principles. - Hands-on experience with MongoDB and Redis. - Experience working with AWS. - Ability to analyze metrics and work with monitoring tools such as Grafana. - Understanding of API contracts and JSON Schema. - Experience with jRPC or similar RPC/API approaches. - Strong understanding of high-load system challenges. - Comfortable working with monolithic architectures and evolving them without disruptive rewrites. Nice to Have: - Experience with real-time systems like Centrifugo. - Experience supporting live game servers, live-ops, and event-driven logic. - Experience profiling and optimizing PHP applications. - Understanding of CI/CD, observability, and production workflows. - Experience with evolutionary development of legacy systems.

Work in a stable international company. Competitive salary, reviewed every 6 months based on market trends and your performance. Flexible work setup: office, remote, or hybrid. Flexible benefits: annual $1000 for perks, including health insurance, sports, therapy, education, and language classes. Full pay during sick leaves and personal leaves, plus 20 working days of vacation annually. Open statistics, including earnings from our games. An epic team ready to share experience and knowledge.