Lead Full Stack Engineer - Spring/React.js

About the Role :

As a Lead Full Stack Engineer, you will own meaningful parts of the Rocketlane product from design through production.

Responsibilities :

• Design and build features end-to-end across our React frontend and Java backend.

• Work closely with Product and Design to turn customer problems into simple, thoughtful product experiences.

• Build polished, performant user experiences for complex SaaS workflows.

• Design clean APIs, data models, and backend services that can scale as our customers and usage grow.

• Solve challenging product problems involving real-time collaboration, rich interactive experiences, workflow automation, large datasets, and highly configurable enterprise use cases.

• Make thoughtful architectural decisions across frontend, backend, database, caching, and asynchronous processing.

• Own the performance and reliability of what you build from browser performance through API latency and database queries.

• Debug complex issues across the entire stack rather than stopping at service boundaries.

• Write maintainable, well-tested code and raise the quality bar through thoughtful code reviews.

• Identify technical debt and proactively improve architecture, developer experience, observability, and engineering productivity.

• Mentor engineers and help the team make better technical decisions.

• Take ownership of features in production and work with the team to diagnose and resolve issues quickly.

• Participate actively in engineering design discussions and influence how Rocketlane's technology evolves.

Requirements:

• We're looking for an engineer who has strong depth in at least one part of the stack, solid engineering fundamentals across the others, and the ability to independently take a customer problem from problem design, architecture, backend, frontend, and production.

Frontend Stack :

• React, modern JavaScript/TypeScript, SPA architecture, component design, HTML/CSS, state management, browser fundamentals, frontend performance profiling.

Backend Stack :

• Java, Spring, HTTP/REST API design, PostgreSQL, Redis, asynchronous processing, message brokers, distributed systems fundamentals.

You'll thrive here if :

• You enjoy owning problems rather than just completing tickets.

• You care about both how a product works and how it feels to use.

• You can move quickly without compromising engineering fundamentals.

• You are comfortable working through ambiguity and breaking large problems into smaller ones.

• You enjoy collaborating directly with product and design.

• You are willing to dive into unfamiliar parts of the stack when the problem requires it.

• You care about performance, reliability, and maintainability.

• You enjoy mentoring other engineers while remaining deeply hands-on.

• You like learning, experimenting, and continuously improving the way software is built.

Nice to have :

• Experience building B2B SaaS products, startup/high-growth company experience, AWS, Docker, CI/CD, real-time collaborative applications, WebSockets, high-volume APIs, Playwright/Cypress, enterprise-grade integrations, and AI-assisted product development.