Hybrid Fullstack Engineer, Web3

at Kiln

• Job title: Fullstack Engineer, Web3
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Laravel, PHP, React, TypeScript, Web3
• Location requirements: Hybrid, Paris, France

About the role

• Fullstack Engineer developing API-first user-facing products for Kiln with a focus on Web3 technologies. Collaborating with cross-functional teams to enhance SaaS offerings and platform stability.

Responsibilities

• Contribute to architectural decisions and technical strategy.
• Be an active contributor within the Fullstack squad owning Kiln user-facing products (Dashboard, 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.

Requirements

• +3 years of experience as Fullstack Engineer, designing, building, and deploying user-facing API-based products.
• Proven TypeScript and React programming skills — professional experience in a production environment.
• +1 year of Web3 experience, building dApps using libraries such as Wagmi and Viem.
• Familiar with software development best practices (Test, CI/CD, DevOps, Security…).
• Previous experience collaborating in a team-based development environment (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.
• Proven interest in Web3, blockchain, cryptocurrency - with solid understanding of protocols, staking, and DeFi.
• Fluent in English.
• Nice-to-have:
• Familiar with Ethereum Virtual Machine and smart contracts.
• Knowledge on how to craft raw blockchain transactions.
• Backend PHP/Laravel programming skills.
• Experience in a fast-growing, early-stage startup.

Benefits

• A fast-paced, no bureaucratic work environment
• Equity share options in the business: if Kiln succeeds, we all succeed!
• Competitive salary
• Flexible holiday
• Flexible remote working
• Internet connection paid up to €50/month
• Significant personal development and tech conf budget