Senior Developer/Tech lead (Java)

About the role

About the Role We’re looking for a Senior Developer/Tech Lead who thrives on solving complex technical problems and enjoys leading a team working on performance-critical systems. This is a fully remote position , offering flexibility while working on a product that processes massive real-time data streams and delivers high-end visual analytics. Please note that our team works in GMT+2/3 hours so your timezone should be compatible What You’ll Do Design and develop high-performance desktop applications Tackle complex challenges in algorithms, data structures, and concurrency Optimize systems for speed and efficiency under heavy data loads Lead and mentor a team of engineers Contribute to architectural decisions and technical direction What We’re Looking For 8+ years of experience in Java development Strong fundamentals in algorithms, data structures, and multithreading Experience with performance optimization Leadership mindset or experience leading teams Solid English communication skills Nice to Have Background in competitive programming (ACM, ICPC, Olympiads, etc.) What Makes This Role Unique Focus on desktop application development (no Spring, no off-the-shelf databases) Work on systems handling hundreds of thousands of events per second What We Offer 100% remote work with flexible setup Paid annual and sick leave Budget for equipment and software (scaled with tenure) Sponsored training and English lessons Collaborative, international team environment Hiring Process The first step to our process is a paid technical task : Takes ~90 minutes on average Please do not use AI Compensation: $100 (upon successful completion and interview participation) Focus on performance and correctness You’ll receive a pass/fail result, and successful candidates will move forward in the process. About Bookmap Bookmap is a leading high-performance visualization and trading platform that transforms how market data is understood. Our platform is widely used across major exchanges, including CME, Eurex, Nasdaq, and crypto markets.