About The Role:

The Software Engineering team at Shardeum is responsible for delivering the Shardeum Mainnet, and developing the smart contract platform, the consensus layer and the protocol layer. We focus on building scalable, performant, secure and reliable software that can be downloaded by thousands of node operators to actualize the Shardeum network. We are in search of a highly talented, innovative Principal Blockchain Engineer that can take on a technical leadership role on highly complex, blockchain projects.

If you enjoy solving complex computer science problems, are passionate about what you work on, are a perfectionist who wants to build things the right way, and are persistent about finishing what you started, then you're the kind of person we are looking for. You will be working with equally talented and innovative individuals with the goal of building incredible software with the potential to change the world.

What You'll Be Doing:

• Provide technical structure to teams and work closely with management and stakeholders to define strategic road maps for complex, Layer-1 blockchain projects.
• Manage individual projects, priorities, deadlines and deliverables with your technical expertise.
• Mentor and train other team members on design techniques, coding standards and best blockchain basics.
• Contribute to the architecture and implementation of complex software components on the blockchain.
• Take on end-to-end ownership of critical software components related to our L1.
• Design and develop innovative new consensus and protocol software.
• Ensure performance optimization, and making scalability / reliability improvements to the software.
• Resolve issues, debugging errors and fixing code to improve the reliability and security of Shardeum software components.
• The tech stack you will be using is: Nodejs, TypeScript, SQLite, Postgres, React and Vuejs.
• The development environment will be: Linux, Git, AWS, Docker and VS Code.

What We're Looking

• Extensive experience designing, implementing and maintaining complex blockchain components.
• You know what high quality code looks like and know how to foster an environment that creates it.
• Fluency with algorithms and data structures.
• The ability to quickly learn new languages and technologies.
• The ability to write clean yet efficient code.
• The Creativity to come up with proof of concept from high level design, even in an often ambiguous environment.
• Hands-on knowledge and experience with AI tools (Cursor, Github Copilot, Windsurf, Cline, etc...), and the ability to demonstrate how you utilize them in your day to day.
• Self motivated to set priorities and methodically make progress toward goals.
• The ability to communicate effectively and convey your ideas when discussing technical topics with team members.
• Bachelor's Degree in Computer Science or a related field.

We'd Love If You Have:

• Experience working on all levels of a Layer 1 blockchain.
• Experience with concurrency, parallelism and distributed systems.
• Experience with consensus protocols and other blockchains.
• Experience with Node.js and TypeScript, or languages like C, C++, Rust or GO.
• Experience writing a smart contract on a blockchain.
• Experience running a node in a blockchain network.
• Read the Bitcoin and Ethereum white papers.

About The Role:

The Engineering team at Shardeum is responsible for delivering the Shardeum Mainnet and developing critical components such as the smart contract platform, consensus layer, and protocol layer. As part of this team, the Senior Software Engineer - Testing Tools & Strategy will play a key role in ensuring the quality, reliability, and performance of Shardeum’s decentralized platform through robust test automation, debugging, and validation processes.

This role is ideal for engineers who have a passion for test automation, load testing, and identifying root causes of bugs to enhance blockchain performance and scalability. If you’re excited about solving unique challenges in the Web3 space and driving innovation in blockchain testing methodologies, we want to hear from you!

What You'll Be Doing:

• Analyze bug tickets, debug code, and identify the root cause of errors across the Shardeum platform.
• Design, develop, and maintain test automation frameworks and reusable test scripts to validate core functionality, including nodes, consensus mechanisms, smart contracts, and blockchain transactions.
• Utilize cutting edge AI tools to make testing faster and more efficient (Cursor, Github Copilot, Windsurf, Cline, etc..)
• Develop and execute load testing scripts to validate system performance under high transaction loads and varying node configurations.
• Create comprehensive test coverage through functional, integration, system, and regression testing while optimizing test suites and identifying performance bottlenecks.
• Develop end-to-end (E2E) test cases for complex workflows, ensuring reliability of consensus protocols and smart contract execution.
• Collaborate closely with development teams to integrate testing into CI/CD pipelines, improve testing workflows, and troubleshoot dependency failures.
• Build and maintain internal tools to improve developer experience, productivity, and test efficiency.
• Troubleshoot highly complex automated testing failures using industry-standard frameworks and custom tools, working with developers and backend partners to triage issues and improve E2E reliability.
• Develop monitoring tools and utilities to track blockchain-specific performance metrics and test results.
• Participate actively in agile ceremonies, including sprint planning, stand-ups, and retrospectives, to drive testing best practices.
• Continuously research and adopt innovative tools, frameworks, and testing methodologies to improve quality, scalability, and efficiency of testing processes.

What We're Looking For:

• 5+ years of experience in Software Engineering experience with a focus on testing.
• Proficiency in programming languages like TypeScript/JavaScript and Node.js, with the ability to develop robust and reusable test scripts.
• Ability/desire to write Unit Tests in TypeScript/JavaScript and Node.js
• Proven ability to analyze and debug complex codebases, troubleshoot multi-tier web architecture issues, and identify root causes of failures.
• Experience integrating automated tests into CI/CD workflows (e.g., GitHub Actions, Jenkins).
• Expertise in defining and implementing release, regression, and smoke testing strategies for large, multi-team applications.
• Experience with white-box testing methodologies to ensure deep validation of internal components.
• Strong problem-solving and critical-thinking skills, particularly in analyzing blockchain-specific issues.
• You have a tester mindset, are curious, and excel at designing innovative and interesting test scenarios.
• You are creative in applying proven tools/test frameworks as well as crafting new solutions to challenging problems.
• Knowledge of Agile/Scrum methodologies and the software development lifecycle.
• Excellent verbal and written communication skills for clear bug reporting and collaboration across teams.

We'd Love If You Have:

• Experience with testing decentralized applications (dApps), consensus protocols, or blockchain platforms.
• Experience in running nodes within blockchain networks and monitoring performance metrics.
• Familiarity with blockchain tools and frameworks (e.g., Web3.js, Hardhat, Truffle).
• Hands-on knowledge and experience with AI tools (Cursor, Github Copilot, Windsurf, Cline, etc...), and the ability to demonstrate how you utilize them in your day to day.
• Contributions to open-source projects related to testing, automation, or blockchain.
• A passion for emerging technologies, including Web3, AI, and distributed systems.
• Experience using or contributing to the Shardeum open-source repos.
• Familiarity with blockchain performance benchmarks and profiling tools.
• Knowledge of the Bitcoin and Ethereum whitepapers.