Lead Fullstack Developer

Full time - Paris/IDF or London + equity_ **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. - 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 **$13+ billion in crypto assets** staked through our platform, Kiln has established a strong presence on Ethereum, managing over 4.3% 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. 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**: - Recruiter Interview (45 min) - Take-home test (< 2 hours) - 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_