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
*not applicable for freelancers
What We Do
N-iX is a global software solutions and engineering services company that helps world’s leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology. Whether you need to build a custom solution, modernize your digital product or acquire extra tech expertise - we have the experience and capabilities to ensure your success. With over 2,000 professionals in 25 countries across Europe and the Americas, N-iX offers expert solutions in cloud, data analytics, embedded software, IoT, AI, machine learning, and other tech domains. Being in business for over two decades, we have worked with dozens of industry-leading enterprises and Fortune 500 companies creating value across a wide variety of sectors, including finance, manufacturing, supply chain, retail, e-commerce, healthcare, and more. Our unique combination of business domain expertise and technical know-how enables us to effectively collaborate with ISVs, tech companies, and enterprises of all sizes. Thanks to the strong tech ecosystem and partnerships with AWS, GCP, Microsoft, SAP, OpenText, Snowflake, and others, we bring extra speed, scale and efficiency to more than 160 organizations across the globe. N-iX is recognized by numerous industry awards, such as CRN Solution Provider 500, Global Outsourcing 100 by IAOP, ISG Provider Lens™, Modern Application Development services providers by Forrester, etc
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