Lead FullStack Developer

Full time - Paris/IDF or London + equity

As a Lead Fullstack Engineer at Kiln, you will join our Software Development Team, composed of 15 engineers split into 4 squads, to build the future of our SaaS/API-first products [https://docs.kiln.fi/v1/]. You will report to our Lead Software Engineer, and collaborate with the Product, Infrastructure and Smart-Contract teams to work on the various products that Kiln offers.

Responsibilities:

• Contribute to architectural decisions and technical strategy.
• Be an active contributor within the Fullstack squad owning Kiln user-facing products (Dashboard, dApp, Widget).
• Design, develop and implement new features :
• 70% frontend (e.g. using our design system to build new features or adding new components to it…).
• 30% backend (e.g. implement the transaction crafting part for a new protocol…).
• Participate in code review, test and CI/CD processes, bug fixing, and code maintenance.
• Interact with customers for debugging purposes and product discovery.
• Make sure we respect any software security norms (Kiln is a SOC 2 Type 1 and Type 2 company).
• Actively suggest continuous improvement of Kiln's platform and engineering practices.
• Communicate with other Kiln teams to help them understand the Software roadmap and technical challenges.
  
  

Stack: TypeScript, React, PHP, Laravel, REST API

Other engineering stacks: Software (Golang); Smart contract (Solidity); Infrastructure (Kubernetes)

Requirements:

• +6 years of experience as a Software Engineer (Backend, Frontend, or Fullstack), designing, building, and deploying user-facing and API-based products.
• +2 years managing a full-stack team (at least 3 developers)
• Proven TypeScript and Vue or React programming skills — professional experience in a production environment.
• PHP/Laravel programming skills.
• Familiar with software development best practices (Test, CI/CD, DevOps, Security…).
• Previous experience collaborating in a team-based development environment is required (sprints, code reviews, standups, problem-solving sessions).
• Curiosity and ability to dig into a topic and follow through.
• Ability to balance between impact and thoroughness in a fast-paced environment.
• Interest in blockchain and cryptocurrency - check our Tech Blog [https://www.kiln.fi/blog] and Open-Source contribution [https://www.kiln.fi/open-source].
• Fluent in both French and English.
  
  

Nice-to-have:

• Familiar with blockchain ecosystem, Ethereum Virtual Machine and smart contracts.
• Experience in a fast-growing, early-stage startup.
• Living close to Paris or London
• Sensitivity to Product Design
  
  

About Kiln:

Kiln is the leading enterprise-grade rewards platform that enables institutional customers to stake assets and integrate staking & DeFi functionality into their offerings. Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.

With $12+ billion in crypto assets staked through our platform, Kiln has established a strong presence on Ethereum, managing over 4.9% of the network through 45,000+ validators — all with zero slashing events.

Kiln serves more than 140 leading customers, including Binance, BitPanda, Bitgo, Fireblocks, VanEck, and TrustWallet.

Our team of 90+ ecosystem enthusiasts brings experience from industry leaders like Google, Circle, Ledger, Chainalysis, and other prominent technology and cryptocurrency companies.

We've raised $30M in total funding from prominent investors including 1kx, Crypto.com, Illuminate Financial, Consensys, Wintermute, Kraken Ventures...

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 £50/month
• Significant personal development and tech conf budget
  
  

Your interview process:

Recruiter Interview (45 min)

Take-home test (

Technical Interview (90 min)

Core Values Interview (45 min)

Founders Interview (30 min)

Offer!

Please note that we are not sponsoring visas for persons without work authorization in the UK or the EU. This role is specifically for employees (no B2B or contractors) based in France, the UK, Italy, Spain, Portugal, Germany & Netherlands. Thank you!