Senior Java Engineer – Trading Systems & Crypto Platforms - Remote We’re looking for a Senior Java Engineer with strong experience in trading systems, financial technology, or cryptocurrency platforms. This role is ideal for professionals who combine deep technical expertise with a strong understanding of digital markets, prediction mechanisms, and decentralized platforms such as Polymarket or Parlay-style systems. You’ll be part of a cross‑functional team working closely with engineers, quantitative researchers, and blockchain developers to build next‑generation trading infrastructure. What you’ll do Design, develop, and maintain high‑performance Java services for trading, liquidity management, and market data processing. Integrate with crypto exchanges, DeFi protocols, and prediction market APIs, ensuring low latency and reliability. Build components for pricing engines, risk management, and transaction validation. Drive system scalability, security, and fault tolerance across all backend services. Collaborate with quant researchers and blockchain engineers to align backend systems with business and product goals. Apply best practices in testing, CI/CD, and secure software delivery. What we’re looking for 6+ years of professional experience in Java development (version 17 or higher). Strong expertise in multithreading, concurrency, and performance optimization. Hands‑on experience in trading, fintech, or crypto platforms. Solid understanding of microservices and event‑driven architecture. Familiarity with Polymarket, prediction markets, or decentralized trading systems (a strong plus). Excellent command of English (C1–C2), with the ability to navigate both technical and business discussions. Bachelor’s degree in Computer Science, Engineering, or related field. This is a senior‑level opportunity to build systems that power real‑time, decentralized decision‑making in high‑stakes environments. If you're ready to take ownership of critical trading infrastructure in a fast‑evolving space — we’d love to hear from you. Seniority level Mid‑Senior level Employment type Full‑time Job function Engineering and Information Technology #J-18808-Ljbffr