Fullstack Engineer (Backend-Heavy)
Why join us?
Handoff is the AI agent that runs a construction company. We help remodelers automate estimating, streamline operations, and win more work — backed by real-time cost data, intuitive design, and workflows that "speak contractor." With over 10,000 monthly active users and $6B in annualized project volume already flowing through our platform, we're becoming the trusted partner for the people who build our homes.
We are backed by $25M+ raised from Y Combinator, Initialized, and Greycroft. Our team is distributed across hubs in Austin, São Paulo, and Buenos Aires, and we are deeply focused on building intuitive, high-impact solutions that make a real difference for our users.
What you'll do
- Own end-to-end technical delivery for 2-3 enterprise accounts, from pilot success criteria through production rollout and ongoing support.
- Customize our core deliverables: estimates, takeoff drawings, and summary reports - to each client's templates, naming conventions, units, materials preferences, and branding.
- Stand up and automate intake and delivery workflows (file transfer, custom CSV exports, API payloads) into and out of client systems.
- Expose and document Handoff's API for clients to consume, and build SKU matching that maps our estimate line items to a supplier's catalog - maintaining mappings as catalogs evolve.
- Assess each client's tech stack (POS/ERP systems such as Oracle), recommend a realistic integration path, and assist with connections to legacy systems, scoping what's feasible and never over-promising.
- Lead weekly calibration reviews with the client's estimating team, incorporate correction notes, and drive accuracy against agreed error-rate targets, treating measurement as a core requirement, not an afterthought.
- Meet delivery SLAs and provide first-line technical support and maintenance throughout the engagement.
- Document account-specific configurations, assumptions, and preferences for continuity and clean handover.
About You
- 5+ years of software engineering experience, with a track record of shipping and operating production systems.
- Full-stack comfort: proficient in Node.js, Python, and SQL, able to customize outputs, build integrations, and automate exports across the stack.
- Hands-on API experience: designing, exposing, and documenting APIs, mapping data to a client's schema, and working with legacy or non-REST systems.
- Strong client-facing skills: professional, responsive, and comfortable working directly in a client's channels (email, calls, Microsoft Teams) with both engineers and non-technical estimating staff.
- Metrics-driven: you define quality metrics, track accuracy trends across iterations, and make progress quantifiable and defensible.
- Self-contained and autonomous: you can own technical delivery for multiple accounts and navigate ambiguity, shifting requirements, and staggered timelines.
- B2+ English, ensuring effective communication and documentation with US clients.
- Bonus: exposure to LLM/AI applications, or familiarity with residential construction (framing, foundation, roofing, siding, interior scope) and estimating workflows.
What we offer
- 💸 Competitive salary in USD
- 💰 Attractive stock options
- 🌴 Unlimited PTO
- 🚛 Relocation allowance
- 👨💻 Top-notch equipment
- 🧳 Team offsites around the world!
JOIN US
Come Build With Us
At Handoff, we move fast, run experiments, and hold a high bar for excellence. If you're excited to solve hard problems and do some of the best work of your life, we'd love to hear from you.
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