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Salary: USD 195,821 - 279,825 / annual
EarnIn is a fintech pioneer in earned wage access, enabling users to access their earnings in real-time without mandatory fees, interest rates, or credit checks. The company is backed by top-tier investors including A16Z, Matrix Partners, DST, and Ribbit Capital, and is experiencing rapid growth with a healthy core business.
We are seeking an experienced Senior Full-Stack Engineer to join our Early Bets initiatives team. This role focuses on building 0-to-1 products end-to-end, working in ambiguous environments where you'll define technical solutions collaboratively with Product and Design teams. You'll thrive in uncertainty and excel at designing scalable architectures that support rapid product evolution.
Key responsibilities include:
- Partner with Product and Design to define, build, and evolve user experiences across the full stack using modern frontend and backend technologies
- Own and evolve both frontend and backend architecture to ensure scalability, performance, accessibility, and long-term maintainability
- Lead the design and implementation of complex frontend systems using React, TypeScript, and Next.js, including SSR, routing, data fetching, and performance optimization
- Design and build robust backend services and APIs using Python and Django, with a focus on reliability, security, and scale
- Establish and uphold full-stack engineering standards, including patterns, tooling, testing strategies, and CI/CD best practices
- Drive cross-team technical initiatives, aligning frontend and backend architecture with platform capabilities and product strategy
- Proactively identify technical risks and opportunities across the stack, providing clear technical direction and tradeoff analysis
- Mentor and guide engineers across frontend and backend disciplines, raising the bar on code quality, architectural thinking, and delivery practices
- Design and implement robust unit, integration, and end-to-end automation tests across the full stack
- Define and monitor full-stack metrics (performance, reliability, user behavior) to inform product and technical decisions
Requirements:
- Bachelor's degree (or higher: MS, PhD) in Computer Science or related technical field involving coding, or equivalent technical experience
- Strong proficiency in modern frontend development: HTML, CSS, JavaScript, TypeScript, React, and Next.js
- Proficiency in backend development using Python and Django, including RESTful API design, data modeling, and service architecture
- Strong experience with frontend architecture, including state management, component design, design systems, and performance optimization
- Experience designing and operating backend systems at scale, including databases, caching, queuing, and API integrations
- Experience building and operating production applications using both server-side and client-side rendering
- Deep understanding of software engineering best practices across the SDLC, including testing, code reviews, observability, and operational excellence
- 4+ years of industry experience with meaningful depth across both frontend and backend development
- Experience working in cloud-based environments (AWS, GCP, or Azure), particularly as it relates to full-stack delivery and integration
- Experience using AI-assisted development tools (e.g., Copilot, Cursor, LLMs)
