Senior Fullstack Software Engineer Jobs in Massachusetts

About us

Cyvl is a Physical AI company on a mission to bring Infrastructure Intelligence to every city, town, and community on the planet. We help governments plan, build, and maintain the physical infrastructure that people depend on every day, roads, sidewalks, bridges, utilities, and more, better than ever before. We pioneered an end-to-end approach that combines purpose-built hardware, computer vision, cloud data pipelines, and AI to transform raw LiDAR and imagery into a living, structured understanding of the built world. Our platform turns what used to take months of manual inspection into actionable intelligence that's easy for any agency to use, saving cities time, money, and resources across hundreds of communities nationwide. At Cyvl, we're building toward a future where every piece of public infrastructure on Earth is captured, understood, and continuously monitored, so the agencies responsible for it and the residents who rely on it can make better decisions, faster. That's the power of Physical AI applied to the real world. We're a fast-moving, high-growth team based in Boston, MA that believes in solving real-world problems with authenticity, simplicity, and boldness. Every member of our team is empowered to take ownership, deliver results, and leave a lasting impact on the communities we serve.

About You

As a Senior Full-Stack Engineer at Cyvl, you will play a leading role in delivering intuitive, performant, and scalable applications for our customers. You'll be responsible for designing and building across the stack, from elegant, component-driven React interfaces to APIs and services in containerized and serverless environments, backed by relational databases. You'll work in close partnership with product to define and ship features end-to-end, and take real ownership of what you build. The differentiators for us will be a strong technical foundation, a good eye for product, and a genuine enthusiasm for leveraging agents to develop across the stack.

Key Responsibilities

- Build across the stack, from component-driven React interfaces to APIs, services, and data layers.
- Design, document, and maintain scalable APIs, and own features end-to-end from conception to deployment.
- Work with containerized and serverless environments and contribute to cloud infrastructure.
- Collaborate with design and product teams to deliver smooth, accessible, and responsive interfaces, and partner with QA and DevOps to ensure robust, testable, and observable systems.
- Contribute to architectural decisions and code reviews across the engineering organization.
- Mentor junior engineers and elevate the overall engineering bar.

Qualifications

Required:

- 5+ years of professional experience in a full-stack engineering role.
- Proficiency in React and a modern front-end toolchain (e.g., TanStack Router, Vite, pnpm/Turborepo), with a focus on clean, reusable components and highly interactive, data-driven user experiences.
- Strong command of JavaScript/TypeScript and modern front-end development practices (hooks, context, etc.).
- Experience building backend services in Python (e.g., FastAPI) and TypeScript (e.g., Cloudflare Workers, Hono), including designing and consuming RESTful and GraphQL APIs.
- Strong experience with a Postgres-based data layer (e.g., Supabase).
- Strong Git workflow knowledge and experience with CI/CD pipelines (Github Actions), and experience with cloud infrastructure (AWS, Kubernetes, Cloudflare).
- Ability to work cross-functionally in a fast-paced, collaborative team environment.

Nice to Have:

- Experience using real user monitoring and analytics tools (e.g., PostHog, Grafana) to make data-driven development decisions.
- Expertise in modern Python development (uv, static type checking, Pydantic, asyncio, pytest).
- Familiarity with event-driven backend architectures using NATS Jetstream.
- Familiarity with geospatial data and tools (e.g., Mapbox, MapillaryJS, PostGIS, map vector tiles, cloud optimized point clouds), and 3D visualization libraries (e.g., Deck.gl).
- Background in data visualization and performance profiling.
- Prior work in early-stage startups or fast-scaling environments.
- Experience writing tests with Vitest, or comparable tools like Jest or Cypress.
- Experience integrating LLM agents or agentic workflows into production web applications.

What we offer

- Comprehensive health, dental, and vision coverage
- 401(k) with immediate vesting
- Generous PTO, paid parental leave, and flexible work options
- Annual professional development stipend
- Team events, referral bonuses, and a collaborative, growth-focused culture

Our Values

At Cyvl, the technology we build directly impacts the roads people drive on, the sidewalks their kids walk to school on, and the infrastructure that keeps communities running. We move fast, we care deeply, about the work, about our customers, and about each other. This is a team where trust isn't a talking point, it's how we operate. Our values guide how we operate and shape a team that is genuinely RAARE:
- Real - authentic, transparent, focused on solving real problems with simple, effective solutions.
- All Out - bold, driven, and committed to delivering results that matter.
- Accelerating - always learning, growing, and moving with intention.
- Reliable - we follow through and deliver at a consistently high bar.
- Empowering - we lift each other up and help governments build infrastructure they can be proud of.

If you want to grow, make an impact that truly matters, and be part of a team that's shaping the future of public infrastructure, you'll feel right at home at Cyvl.

At Cyvl, we welcome diversity in all forms. We do not discriminate based on race, color, religion, sex, gender, sexual orientation, age, national origin, disability, veteran status, or any other protected characteristic.

Compensation Range: $130K - $160K