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QA Engineer (Blockchain)




Paris, France

Full-time – Permanent – Paris or Remote from France  – 55/70k€ + equity

As a Blockchain QA Engineer at Kiln, you will join our EVM Development Team, composed of 6 engineers owning APIs and Smart Contracts products []. You will collaborate with our Tech Lead Engineers to design a global quality assurance strategy, aiming to increase test consistency and coverage at scale. You will also work as a multi-squad contributor to provide tooling, and best testing practices to the team.


  • Develop and maintain a comprehensive and scalable testing framework for our smart-contracts and backend services, ensuring efficient and reliable test execution.
  • Collaborate with Smart-Contract Engineers and the Product Manager to understand project requirements and identify areas that require enhanced testing coverage.
  • Document test plans, test cases, and test reports to ensure effective test coverage and traceability.
  • Define and implement with the development team testing practices, standards, and guidelines to ensure consistent and high-quality deliverables.
  • Define and implement data integrity testing practices, ensuring the accuracy, completeness, and consistency of data stored and processed by our applications.
  • Identify, analyze, and report defects, issues, and risks, and work closely with development teams to facilitate timely resolutions. 
  • Prepare, participate and follow through external audits with our partners (eg. Halborn, Quantstamp, Spearbit…) and certifications processes (eg. SOC, ISO…).


  • Smart-contract: Solidity, Foundry, OpenZeppelin.
  • Software: Golang, Node.js, TypeScript, PostgreSQL, Open API, Python.
  • Infrastructure: Docker/Kubernetes.


  • 3+ years of experience as a Quality Assurance Engineer, within a high-standard software engineering environment:
    • End-to-End testing frameworks (Cypress, Selenium, Puppeteer, Nightwatch...).
    • Software development best practices (BDD, CI/CD, DevOps...). 
    • API and microservice testing.
  • Programming skills in Solidity, Python, Go or TypeScript.
  • Familiar with Ethereum Virtual Machine (EVM), smart contracts development and/or audit. 
  • Excellent communicant, with analytical and problem-solving mindset.
  • Fluent in both French and English.


  • Experience working on API/microservice or smart contract based products
  • Curiosity in Web3 cyber-security topics
  • Genuine interest in blockchain and cryptocurrency - check our Tech Blog [] and Open-Source contribution [].

About Kiln:

Kiln is the leading enterprise-grade staking platform, enabling institutional customers to stake assets, and to whitelabel staking functionality into their offering. Our platform is API-first and enables fully automated validators, rewards, and data and commission management.

With over $7+ billion crypto assets being programmatically staked, Kiln has a particularly strong track record on Ethereum as we run over 4.3% of the network; this includes 40,000+ validators with 0 slashing events.

The team is made up of over 60 ecosystem enthusiasts formerly at Google, Circle, Ledger, Chainalysis, and other leading technology and cryptocurrency companies.

Join Kiln and help us make the web more secure, stable, decentralized, and fair!

How Kiln will support you:

  • A fast-paced, no bureaucratic work environment
  • Equity Share Options in the business: if Kiln succeeds, we all succeed!
  • Competitive Salary
  • Unlimited holiday
  • Flexible remote working
  • Choose your IT equipment
  • Internet connection paid up to  €50/month
  • Significant personal development and tech conf budget

**Your interview process: **

  1. Recruiter Interview (45 min)
  2. Take-home test (< 2 hours)
  3. Technical Interview (60 min)
  4. Core Values Interview (45 min)
  5. Founders Interview (30 min)
  6. Offer!

Please note that we are not sponsoring visas for persons without work authorization in France. This role is specifically for employees (no B2B or contractors) based in France. Thank you!