Join Mojito as a Founding Full-Stack Engineer on our core product team to own the architecture and implementation of a platform at the intersection of Web3 and consumer experiences, working across the stack from frontend to backend to infrastructure, defining the technical culture and trajectory of the company.
Job listings
As part of the Product team, you will work with leaders in the blockchain space solving novel technical, economic, and social challenges. You’ll work directly with leading application teams to improve their experience using Arbitrum technology and accelerate their growth through direct contribution. You’ll also serve as an advocate and educator, interacting with the developer ecosystem online and in-person.
In this role, you will play an essential part in building new components, communicating with our users to gather feedback, and working collaboratively with the rest of the team to make sure we solve important problems and provide a great user experience. You will lead critical projects end-to-end, build sequencer-adjacent services, deep dive on performance, ensure security, strive for operational excellence, mentor teammates, and track ecosystem changes.
As a Backend Engineer at Kiln, you will join our Software Team, composed of 14 engineers (Backend, Frontend, QA) split into squads, to build the future of our SaaS/API-first products. You will report to our Head of Software, and collaborate with the Product, Infrastructure and Smart-Contract teams to work on the various products that Kiln's offers.
Seeking a Full-Stack API Developer to build and maintain merchant integration APIs, client portals, and SDKs for our crypto wallet app’s merchant payment system. You will develop backend services to support crypto-only payments via QR/NFC and POS, contributing to the January 2026 rollout. This role requires expertise in API development, merchant systems, and blockchain technology.
Design, engineer, and audit Gensyn's solidity smart contracts, writing smart contracts which orchestrate ML workflows and the arbitration/settlement of our verification systems. Conduct security audits of contracts and integration points with the rest of the Gensyn codebase. Test and debug to ensure that the code is production ready.
North America
4w PTO
As a Principal Crypto Software Developer, you'll be a leading force in building Wealthsimple's non-custodial crypto infrastructure from the ground up. You'll operate at the intersection of traditional fintech and decentralized protocols, setting the technical direction and bridging the gap between complex blockchain technology and intuitive user experiences. This role offers the unique opportunity to define how over a million crypto clients interact with decentralized finance.
As a Blockchain Engineer at Immutable, you’ll work at the cutting edge of Ethereum scaling and rollup technology. You’ll take ownership of protocol-level features, designing and shipping core blockchain infrastructure that supports high transaction volumes while keeping costs low and latency minimal. You’ll collaborate with world-class engineers to push the boundaries of Layer 2 scalability, interoperability, and performance contributing directly to Immutable’s mission of powering the next generation of Web3 games.
Join the Solutions team at Aragon and design and build custom integrations for clients on top of the Aragon OSx protocol, transforming client needs into technical designs and production-ready code. You will lead projects from inception to live maintenance, with expertise in Solidity and an understanding of Decentralized Finance (DeFi). Collaborate with product and engineering squads to deepen knowledge of web3 technologies and solve teammate’s challenges.
As an engineer joining the Engineering team, you will be key in launching the unified platform for all Chainlink products. Your focus will be on scalability, automation, and security to support seamless product onboarding. Collaboration across teams will be essential to ensure smooth cross-product integration with minimal disruption.