Senior Software Engineer, Developer Experience

Coinme

About The Position

At Coinme, we’re redefining access to financial services in a digital world. By combining the cutting-edge power of blockchain technology with everyday simplicity, we make digital currencies accessible and usable for all. As the world's largest network of cryptocurrency kiosks with over 40,000 locations nationwide, we're breaking down barriers to crypto adoption through our seamless mobile app, secure digital wallet, and DeFi integrations. Beyond our consumer offerings, we're also the infrastructure powering the crypto revolution for businesses. Through our enterprise Crypto-as-a-Service (CaaS) platform, we enable businesses to launch crypto capabilities in weeks, not months. Our modular, API-first infrastructure provides everything from KYC and payment processing to liquidity and custody solutions—all fully licensed and compliant. We’re big enough to lead the charge in decentralized finance but small enough that your ideas will make waves. Every role at Coinme contributes to building a financial future where everyone has the tools to thrive. At Coinme, your growth fuels our mission. Together, we RISE. Role Overview As a Senior Fullstack Engineer on the Developer Experience team, you'll architect and build the tools that power Coinme's ecosystem—from internal platforms that enable our teams to move faster, to partner portals that extend our financial technology to external stakeholders. You'll work with cutting-edge technologies including React, TypeScript, and Node.js to create a comprehensive suite of reusable components, modular feature flows, and scalable applications that make complex financial operations seamless. This role blends technical leadership with hands-on development in a fast-paced environment where your architectural decisions will shape how we build and scale our products across web and native platforms. We move fast but thoughtfully. You'll have autonomy to contribute to and make technical decisions while collaborating with a team that values clean code, reusable patterns, and user-centric design. We're building for scale from day one, so your architectural choices matter.

Requirements

Bachelor's degree in Computer Science, Software Engineering, or equivalent experience
6+ years of hands-on experience in web development, including:
Strong JavaScript & TypeScript fundamentals—we're a TS-first team
5+ years with React experience
5+ years React (functional components, hooks, Redux/RTK) expertise
Proficiency in HTML/CSS and component-based UI development
Experience with styled-components, ThemeProvider, and design systems
CSS-in-JS experience for component styling and theming
Familiarity with micro-frontend architectures
Backend experience with Node.js/Express and API development
Strong understanding of web architecture, functional programming, and performance optimization
Self-starter who can take ownership of features from concept to deployment
Enjoys wearing multiple hats and tackling diverse technical challenges
Experience in fast-paced environments where shipping quickly matters
Comfortable working with CI/CD pipelines and deployment processes

Nice To Haves

React Native Experience
Experience with component library architecture and design systems
Background in fintech or complex data-driven applications
Experience with consumer-facing web applications
Knowledge of accessibility best practices (WCAG, ARIA)
i18n/localization implementation experience (i18next)
Experience creating and publishing NPM packages
Understanding of state machine concepts for modeling complex application flows
Familiarity with cryptocurrency, blockchain technologies, or highly regulated industries

Responsibilities

Frontend Development: Build high-performance React applications with TypeScript, Redux (RTK), and styled-components while ensuring a seamless user experience
Backend Development: Work with Node.js/NestJS to develop and optimize API services
Reusable component libraries with advanced theming capabilities using CSS-in-JS, styled-components, and ThemeProvider
Modular feature flows that can be orchestrated into complete app experiences
Internationalized experiences supporting multiple markets and languages
Collaboration: Work closely with Product and Design teams to translate business needs into technical solutions
Scalability & Performance: Design and deliver scalable, resilient, and secure web applications
CI/CD & Testing: Help create and maintain an efficient CI/CD pipeline, incorporating unit testing and static analysis tools (Jest, Testing Library, Storybook)
Monitoring & Analytics: Implement instrumentation and logging for performance tracking and data-driven improvements
Security & Compliance: Build secure solutions in compliance with industry best practices and regulatory requirements