About CoinList

CoinList is a leading crypto financial platform supporting the full lifecycle of crypto investment. We offer a comprehensive suite of services, including token sales, trading, lending, staking, and access to DeFi opportunities. CoinList has helped raise over $1.1 billion for groundbreaking projects, establishing itself as the go-to platform for innovative blockchain companies. Our platform is trusted by validators, miners, founders, crypto funds, and a broad array of crypto enthusiasts globally.

The Opportunity

We're looking for a Senior Software Engineer (Full Stack, Backend-leaning) to join our Core Team. You'll play a key role in building and scaling the core financial infrastructure that powers CoinList's money movement, wallet, and custody solutions, while also owning and improving our web application experience. This is a high-impact role where you'll ship production systems, shape product direction, and help set technical standards for the team. This role is ideal for a full stack engineer (backend-leaning) who thrives in product-focused environments, cares deeply about UX and frontend polish, and is excited to own both backend infrastructure and web product experiences in a fast-paced fintech startup.

What You'll Do:

Design, build, and scale robust financial software systems and backend services that power money movement, custody, and payment flows
Develop and maintain web frontends (React, LiveView) with a focus on UX, collaborating closely with designers to deliver polished, user-friendly products
Architect and optimize wallet and custody solutions for a variety of cryptocurrencies, ensuring security, reliability, and scalability
Own projects end-to-end: From concept and design through implementation, testing, deployment, and monitoring
Collaborate cross-functionally with product, compliance, and other engineering teams to deliver secure and delightful financial products
Participate in code reviews, share knowledge, and help upskill junior engineers
Identify and address performance bottlenecks, reliability gaps, and opportunities for automation
Influence product and technical direction, working closely with leadership and crypto founders

Requirements

5+ years of professional engineering experience shipping high-quality code in production environments
Strong coding fundamentals
Proven experience scaling financial systems (fintech, payments, trading, or crypto/DeFi platforms)
Security-first mindset and deep understanding of best practices in financial software development
Experience with, or open to learning and working with, Elixir and LiveView (backend and frontend)
Demonstrated experience building and maintaining production web frontends (React, LiveView, or similar)
Track record of product ownership, attention to detail, and working collaboratively with designers

Bonus Skills:

Experience with distributed systems or microservices architecture
Prior Elixir experience is a plus but not required-willingness and ability to learn is key
Familiarity with blockchain protocols, crypto custody, or staking systems
Experience integrating with payment rails, ledgers, or compliance systems
Contributions to open-source projects or crypto communities
Backend engineering fundamentals with experience in modern languages (Elixir, Ruby, Go, TypeScript, Python, etc.)

Tech stack:

Elixir (primary), LiveView (frontend), Ruby. Most new development is in Elixir and LiveView
Legacy systems in Ruby on Rails and React

Benefits

$128,000 - $179,000 USD base + significant equity (depending on experience/location)

CoinList

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