Remote Senior Software Engineer

Description:

• We are looking for a curious and collaborative Senior Software Engineer based in Europe or Latin America to join Rootstock Labs during an exciting time of growth.
• You will be part of the core development team behind the Rootstock (RSK) client.
• The team is evolving its compatibility with the EVM, contributing to consensus improvements, and designing secure, high-performance protocol features.
• You’ll work closely with experienced blockchain engineers in a fast-paced environment to push the boundaries of web3 infrastructure.
• This is a hands-on engineering role focused on Java-based development, with occasional Solidity scripting for testing purposes.
• All features will be developed using Java, the primary language of the Rootstock client.
• Analyze complex requirements to improve the Rootstock client, which may include Ethereum consensus changes, Bitcoin scripts, or internal research papers.
• Design and implement features using Java, adhering to secure, scalable, and performance-conscious best practices.
• Write clean, modular, and well-tested code using appropriate design patterns.
• Collaborate on peer reviews and team discussions; continuously improve development processes and code quality.
• Write simple Smart Contracts to validate the features developed in our client, assuring that it works as it is in EVM.
• Share research findings and technical insights with global peers across the company.
• Update and expand our Github actions scripts from our pipelines.

Requirements:

• 5+ years of professional experience in Java, or equivalent experience with JVM-based languages (Kotlin, Scala, Gradle) or C++.
• Solid experience working on core blockchain components (e.g., node/client development) — ideally in chains that support Ethereum or Bitcoin L2s.
• Understanding of Ethereum or Bitcoin architecture, smart contract execution, and consensus mechanisms.
• Ability to reason about security, performance, and edge cases in complex distributed systems.
• Proficiency in writing clean, maintainable code and applying object-oriented programming principles.
• Strong grasp of data structures (e.g., trees, graphs) and their practical use in system design.
• Experience with basic Solidity scripting and knowledge of how to interact with smart contracts.
• Familiarity with CI/CD pipelines and scripting automation (e.g., GitHub Actions).
• Excellent team player — you take ownership, communicate clearly, and enjoy collaboration.
• Proactive about quality, security, and documentation.
• Fluent in English (written and spoken).

Benefits:

• At Rootstock Labs, we don’t just offer a job—we offer a community.
• Competitive Salary.
• 100% Remote Work from Europe / Latin America, with access to global CoWorking spaces.
• Work-Life Balance: Up to 35 vacation days, 30 sick days, and parental leave.
• Continuous Learning: Access to training programs, language courses, and learning sponsorship annually.
• Health & Well-Being: Tools like OpenUp, an employee assistance program.
• Unique Projects: Work with cutting-edge blockchain technology in a global, diverse team.
• Monthly Allowance for Contractors to support your connectivity and well-being.