Commitment: Full-time Location: Madrid, Spain Work type: Hybrid

We are a team to design, develop, maintain, and improve software for various ventures projects, i.e., projects that are adjacent to our core businesses and are bootstrapped fast with a lean team. You will be actively involved in the design of various components behind scalable applications, from frontend UI to backend infrastructure.

Job Responsibilities:

• Development activities include development, proposing architectural decisions, participating in designs, design review, code review, and implementation.
• Identify issues and implement solutions to complex problems in the blockchain protocol.
• Analyze and solve difficult problems across the blockchain protocol.
• Work closely with operations and infrastructure to build high-scale backend services.
• Management of documentation of all code and functionalities implemented.
• Work closely with DevOps and ecosystem engineers to improve tech stack for long-term engineering initiatives.

Job Requirements:

• Interested in building first-class products to solve real-world problems.
• Experienced with various technologies, a fast learner, and have a "get things done" mentality.
• Strong organizational skills, interpersonal skills, and the ability to juggle conflicting requirements from many different stakeholders.
• Humble to embrace better ideas from others, eager to make things better, open to challenges and possibilities.
• Self-starter who can define and execute tasks with minimal guidance.
• Open to learning, collaborative, willing to give and receive feedback.
• 5+ years of engineering experience, preferably strong backend development experience (e.g., Go, Rust, Java, Erlang).
• Hands-on experience in using basic cryptographic primitives (e.g., BouncyCastle in Java): digital signatures, key exchange, symmetric and asymmetric encryption.
• Basic knowledge of distributed systems and understanding of consensus algorithms, such as Raft or PBFT.
• Experience with or interest in Go or Rust.
• Hands-on experience with any existing blockchain system internals is welcomed but not required.