Junior Fullstack Engineer

Were looking for a Junior Fullstack Engineer who is building their foundation and wants to grow quickly alongside experienced teammates. Youll work in one of two engineering squads, Gateway or Connect, shipping real features across our React web app and Node backend that small businesses rely on every day. Youll have a dedicated mentor, well-scoped work, and plenty of room to learn how a world-class production SaaS platform is built, run, and scaled.

Gateway owns the front door to Quo: how businesses sign up, choose a plan, pay, verify their business for compliance, and bring their existing phone numbers with them. Youll work on everything from the sign-up, plan, and checkout experiences customers see to the systems behind them, like billing and subscriptions, pricing and trials, taxes, account and trust verification, and number porting.

Connect makes Quo part of the rest of a small businesss tech stack. Youll help build and maintain integrations with tools like HubSpot and Salesforce, including the in-app experiences customers use to connect and manage them, and contribute to Quos public API and webhooks, which let customers send messages, sync contacts, and log calls and messages in the other apps they use every day.

Some of the things you’ll do:

• Spend most of your time writing, testing, and shipping code in TypeScript, across our React frontend and Node backend.
• Build user-facing features in our web app, working from designs in Figma and our shared component library.
• Own well-scoped tasks end to end: understand the customer problem behind a ticket, build and test the change, and confirm it works once its live.
• Investigate and fix bugs reported by customers and our support team.
• Review your teammates code and learn from their reviews of yours.
• Write tests and documentation alongside your code, so the next person can pick up where you left off.
• Use AI coding tools to move faster while maintaining personal growth.
• Work closely with your mentor and squads, ask questions early, and grow toward owning larger pieces of work.

Technical stack and tools:

• Our web app is built with React and TypeScript, using GraphQL and Relay for data fetching.
• We build UI with Vite, Vanilla Extract, and React Aria, and develop components in Storybook.
• We test with Vitest and React Testing Library.
• Our backend is built on Node using TypeScript.
• Our architecture is event-driven microservices with RabbitMQ at the center, with a federated GraphQL layer.
• We use a variety of databases for different purposes: Postgres, Elasticsearch, and Redis.
• Observability and delivery tools.
• Other tools: Claude Code and other AI coding tools, Linear, Notion, Slack, and Figma.

Small Business, Artificial Intelligence (AI), Customer Satisfaction, React.js, Internet Application, Mentoring, Software as a Service (SaaS), Software Porting, Pricing, Billing, * You have at least 2 years of software engineering experience in formal, full-time work environments

• Youve built web interfaces with React and TypeScript
• Youve written backend code, such as APIs or services, using Node and TypeScript
• You enjoy working across the stack, from building interfaces people use to the APIs and data behind them.
• You have a solid grasp of programming fundamentals, including HTML and CSS, data structures, APIs, databases, and writing tests, and youre eager to deepen them.
• You display a strong sense of ownership of your work by monitoring performance, usage, and errors after it ships.
• Youre curious. You seek to understand the “why” behind things so you can better plan and build the “how.”
• You use AI tools in your work and think critically about what they produce.
• You care about the people who use what you build. You practice empathy and thoughtfulness as you weigh trade-offs.
• You strive for code thats readable, testable, and maintainable, and you leave things better than you found them.

Nice to have:

• Experience with SQL databases such as Postgres.
• Exposure to REST or GraphQL APIs, GraphQL clients like Relay or Apollo, or building against third-party APIs.
• Familiarity with web accessibility or component-driven development.
• Familiarity with message queues or event-driven systems.
• Interest in payments, billing, or SaaS integrations.

The annual base salary range for this position is as follows, plus equity and benefits:

• SF Bay Area, Los Angeles, Seattle, Portland, Boston, New York, and Washington, DC Metro: $141,000 - $166,000 USD
• All other US Locations: $127,000 - $150,000 USD
• Canada: $130,000 - $153,000 CAD

The ranges displayed reflect the target for new hire salaries, and within each range, individual pay is determined by your skills and experience, as well as relevant education. Your recruiter can share more and answer questions about the specific salary range during the hiring process.

Salary is just one component of Quo’s total compensation package. Your total rewards package will include equity, extensive medical coverage, a monthly lifestyle stipend, and a flexible PTO policy.

Small businesses represent 99.9% of all companies, yet theyre still forced to choose between clunky, outdated enterprise phone systems or their personal phones. This multi-billion dollar market has been overlooked for decades, left to cobble together solutions that slow them down instead of helping them grow.

Quo is changing that. We bring calls, texts, and customer information together into one easy-to-use, AI-powered platform. Were not just building a phone system. Were setting a new standard for how businesses connect with their customers.

Driven by our values, we move fast, build with determination, and obsess over delivering value to the businesses that have been underserved for far too long.

Today, Quo is trusted by more than 120,000 companies and rated #1 in customer satisfaction on G2. Were backed by Y Combinator, Tiger Global, Craft Ventures, Slow Ventures, and other top-tier investors. Its safe to say were onto something big., Were a remote-first company with a culture of trust, autonomy, and action. As we rapidly grow, were intentionally building communities in a handful of hub cities while continuing to hire great talent wherever they happen to live. If youre looking for a place to do your best work, wed love to hear from you.