Senior Java Engineer

About us N-iX is a software development service company that helps businesses across the globe develop successful software products. Founded in 2002 in Lviv, N-iX has come a long way and increased its presence in eight countries Poland, Ukraine, Sweden, Bulgaria, Malta, the UK, the US, and Colombia. Today, we are a strong community of 2,000+ professionals and a reliable partner for global industry leaders and Fortune 500 companies. About our client Our customer is a leading, fully regulated US-based digital asset trading platform. They provide secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem. About The Role Our Senior Backend Software Engineer will be responsible for architecting, developing, and maintaining the high-performance backend services that power the core platform. Leveraging deep expertise in Java and distributed systems, you will collaborate with cross-functional teams to deliver secure, scalable solutions while exploring and integrating cutting-edge blockchain technologies. Key Responsibilities • Design, build, and maintain high-throughput backend services and APIs in Java. • Drive architecture discussions to enhance system scalability, resiliency, and performance. • Prioritize security and compliance as core aspects of service design and delivery. • Collaborate with product, security, DevOps, and compliance teams on cross-functional initiatives. • Mentor engineers and lead by example with high engineering standards and best practices. • Research and prototype blockchain integration opportunities (e.g., node syncing, client tooling). • Advocate for maintainable, modern infrastructure informed by industry best practices. Required Qualifications • Bachelor’s or Master’s degree in Computer Science or related field. • At least 8 years of professional software engineering experience without a degree in Computer Science-related field , or at least 6 with an advanced degree in a different field. • Strong communication skill and collaboration skills, motivation, problem solving mind set.  • Strong proficiency in Java and experience with modern frameworks and distributed systems. • Experience with performance optimization (e.g., low-latency systems, microservices). • Knowledge of security and compliance best practices in financial or regulated contexts. • Interest or hands-on experience in blockchain, crypto infrastructure, or decentralized systems. • Strong collaboration and mentorship skills in a fast-moving, cross-functional environment. • Hands-on experience with BDs, async messaging (Kafka, RabbitMQ, etc.), CI/CD stack NB: This role requires working hours that overlap with the West Coast (PST) time zone. Candidates are expected to follow the schedules below (Monday–Friday), based on their location:LATAM: 11:00 – 20:00 Colombia: 09:00 – 18:00 Europe (EET): 12:00 – 21:00 Europe (CET): 11:00 – 20:00 Please note that alignment with these working hours is an essential requirement of the role. We offer*: • Flexible working format - remote, office-based or flexible • A competitive salary and good compensation package • Personalized career growth • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) • Active tech communities with regular knowledge sharing • Education reimbursement • Memorable anniversary presents • Corporate events and team buildings • Other location-specific benefits *not applicable for freelancers