Full Stack Engineer II

About Avici

Avici is a fintech startup changing the way people use stablecoins. Our platform enables easy spending, saving of stablecoins through an integrated solution featuring a DEFI wallet & Visa credit card.

Our purpose is to decrease the influence of central banks by building distributed internet banking infrastructure

Role Overview

Full Stack Developer

You'll be working closely with the founders to build secure APIs, scalable backend systems, and intuitive front-end interfaces for wallets, transactions, and dashboards.

Key Responsibilities

• Develop, optimize, and maintain backend APIs using

  Node.js

  and

  Express

  .
• Design scalable database schemas and queries using

  MySQL

  and

  MongoDB

  .
• Build front-end interfaces and dashboards using

  Next.js

  and

  React

  .
• Integrate smart contract interactions via

  Web3.js

  or

  Viem

  for ERC-20 tokens and on-chain activities.
• Work with authentication layers, middleware, and session management (JWT, Web3Auth, etc.).
• Collaborate with product and design teams to deliver smooth UX across mobile and web.
• Write clean, maintainable, and testable code (TypeScript preferred).
• Implement caching, queues, and performance optimization for API endpoints.
• Participate in code reviews, architecture discussions, and deployment automation (Docker, Nginx).

Requirements

• Strong proficiency in

  JavaScript/TypeScript

  and

  Node.js

  ecosystem.
• Hands-on experience with

  MySQL

  (joins, indexing, stored procedures) and

  MongoDB

  (aggregation pipelines).
• Practical knowledge of

  Next.js

  ,

  React

  , and front-end state management (Redux/Zustand).
• Understanding of RESTful APIs, WebSockets, and real-time data flows.
• Familiarity with

  Web3.js

  ,

  Ethers.js

  , or

  Viem

  and

  ERC-20

  token standards.
• Good understanding of authentication, security best practices, and error handling.
• Experience using Git, Postman, and Docker for development workflows.
• Ability to work independently, manage priorities, and communicate clearly.

Good to Have

• Experience with

  Supabase

  ,

  Redis

  , or

  GraphQL

  .
• Exposure to

  Solana

  or

  EVM

  smart contracts.
• Familiarity with wallet integrations (Web3Auth, ZeroDev, or Safe).
• Knowledge of cloud deployment on

  DigitalOcean

  ,

  AWS

  , or

  Vercel

  .
• Interest in fintech, blockchain, and digital asset ecosystems.

Perks

• Work directly with the founding team and shape product direction.
• Exposure to cutting-edge Web3 technologies and cross-chain architecture.
• Competitive compensation and token/ESOP opportunities.