Quality Assurance (QA) Blockchain Developer for ZIGCHAIN

We seek a meticulous and proactive Quality Assurance (QA) Developer to join our core development team.

You will work side by side with blockchain engineers to ensure every release meets the highest standards of reliability, performance, and security.

This role is pivotal in defining and executing our Quality-First culture, building automated test frameworks, validating protocol logic, and helping shape our QA strategy across the ZIGChain ecosystem.

If you're passionate about blockchain, detail-oriented, and thrive in fast-paced environments where precision matters, we'd love to hear from you.

At ZIGChain, we're designing the next generation of blockchain infrastructure, leveraging decentralized technologies for enhanced security, scalability, and interoperability. Our mission is to empower people everywhere through transparent, decentralized systems that drive financial freedom. ZIGChain is a Layer 1 blockchain focused on unlocking financial opportunities for everyone, regardless of their income, location, or level of knowledge.

What You'll Be Testing:

• Core blockchain protocol and Tendermint consensus layer
• Custom Cosmos SDK modules and transaction types
• Multi-node network configurations and chain upgrade procedures
• IBC (Inter-Blockchain Communication) integrations and cross-chain functionality
• Validator operations, staking mechanisms, and governance proposals

Key Responsibilities

Blockchain & Protocol Testing:

• Conduct thorough functional, integration, and regression testing of ZIGChain's core blockchain modules.
• Test chain upgrades, governance proposals, IBC protocols, and network partition scenarios
  
  

Automated Testing Infrastructure

• Design and maintain comprehensive automated test suites (unit, integration, end-to-end)
• Build reusable test utilities, fixtures, and mock services for blockchain scenarios
• Integrate tests into CI/CD pipelines and ensure robust coverage (>80% for critical components)

Security & Performance

• Perform security testing for blockchain vulnerabilities (replay attacks, double-spending, front-running)
• Execute load/stress testing to validate network performance, TPS, block times, and resource utilization
• Implement fuzzing strategies to discover edge cases

QA Process & Standards

• Define and evolve QA standards, test planning, and bug lifecycle management
• Maintain QA metrics, dashboards, and provide release quality assessments
• Promote testing best practices and continuous improvement culture
  
  

Bug Management & Collaboration

• Triage bugs by severity, create reproducible test cases, and track resolution
• Partner with developers and DevOps on parallel testing, code reviews, and issue resolution
• Set up and maintain test environments (devnets, testnets, staging)

Required Skills & Experience

• 2+ years as a QA Engineer or Developer in Test.
• Strong Go (Golang) programming and testing (Go testing package, testify, etc.)
• Programming experience in Python for test automation, scripting, and tooling
• Familiarity with blockchain fundamentals and distributed systems.
• Experience with GitHub-based workflows (issues, actions, PRs).
• Strong analytical and problem-solving skills; ability to identify root causes quickly.
• Experience integrating automated tests into CI/CD pipelines (e.g., GitHub Actions, Jenkins).
• Solid grasp of test automation frameworks (e.g., Go testing, PyTest...).

Nice to Have

• Hands-on experience with the Cosmos SDK or Tendermint.
• Familiarity with Rust (for interchain modules or smart contracts).
• Understanding of IBC (Inter-Blockchain Communication) testing.
• Knowledge of security testing or fuzzing frameworks.
• Experience with performance/load testing of blockchain nodes.
• Familiarity with Chain Upgrades, Testing migration paths, backward compatibility, governance proposals

Soft Skills

• Detail-oriented with a "break-it-to-make-it-better" mindset.
• Excellent communication skills and ability to collaborate in distributed teams.
• Passion for automation, continuous improvement, and clean code.
• Collaborative team player with strong ownership mentality
• Self-directed and comfortable working autonomously in remote environments

What We Offer:

• Competitive annual salary ranging from $80.000,00 to 110.000,00( USD).
• 15% extra to the salary in ZIGs tokens as part of the compensation package.
• Fully remote work environment.
• Opportunity to work in a cutting-edge industry.
• Collaborative and inclusive work culture.
• Professional growth and development opportunities.

Why Join ZIGChain?

• Impact, build the core infrastructure that powers a decentralised, interoperable financial future,
• Innovation, work with a cutting-edge tech stack in a space that rewards experimentation and creativity,
• Ownership, take end-to-end responsibility for modules and systems that shape real blockchain adoption,
• Growth, join a team that values learning, autonomy and technical excellence at every level.

Our Core Values

At ZIGChain we don't just build blockchain technology, we build a culture rooted in Trust, Excellence, Accountability and Mastermind.

• We Foster Trust, we collaborate transparently and act with integrity,
• We Pursue Excellence, we challenge ourselves to innovate and deliver outstanding results,
• We Own Accountability, we take responsibility and follow through with precision and purpose,
• We Cultivate a Mastermind, we think collectively, share ideas and celebrate together.

These values drive how we work, grow and make an impact, and we're inviting you to be part of it. Apply now!