N-iX is looking for a Senior Blockchain Software Engineer to join our team!
Our client 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.
Role Objective:
The Senior Blockchain Software Engineer will architect, develop, and maintain the high-throughput backend systems that power a core fintech platform. Utilizing deep expertise in Java and distributed systems, you will take ownership of advanced blockchain integrations, decentralized infrastructure, and crypto-native solutions within a highly secure and regulated environment. This role places a strong emphasis on blockchain technologies, offering opportunities to work on blockchain-based integrations, decentralized systems, and crypto infrastructure, making it ideal for engineers passionate about advancing blockchain innovation.
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. * Lead research, prototyping, and implementation of blockchain integration opportunities (e.g., node syncing, client tooling, smart contract interactions). * Advocate for maintainable, modern infrastructure informed by industry best practices. * Maintain up-to-date documentation of test results and report test coverage and defect trends
Required Qualifications * Bachelor’s or Master’s degree in Computer Science or related field. * Ideally ~8 years of professional software engineering experience * 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. * Deep interest and/or hands-on experience in blockchain, crypto infrastructure, or decentralized technologies (e.g., EVM-based networks, consensus protocols). * Strong collaboration and mentorship skills in a fast-moving, cross-functional environment. * Previous background in the FinTech, Crypto, or Web3 sectors * Strong collaboration and mentorship skills in a fast-moving, cross-functional environment. * Upper-intermediate English proficiency is required, along with native proficiency in Spanish or Portuguese.
Preferred Qualifications * Exposure to test automation frameworks and tools (Selenium, Cypress, Postman, or Maestro). * Experience with API testing and integrating QA processes into CI/CD pipelines..
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 * ot applicable for freelancers
