Senior Full Stack Engineer

Haus

Senior Full Stack Engineer developing on a Python/Flask API and a React frontend for marketing optimization platform. Collaborating with a team to improve architecture and deliver impactful features.

Posted 6/24/2026full-timeSeattle • Washington • 🇺🇸 United StatesSenior💰 $200,000 - $220,000 per yearWebsite

Tech Stack

Tools & technologies

CloudFlaskGoogle Cloud PlatformMySQLPostgresPythonReact

About the role

Key responsibilities & impact

Own features end-to-end: from API design and database migrations through React UI and data visualization, all the way to monitoring and on-call support
Build and harden integrations with third-party ad platforms (Meta, Google, TikTok) — design for reliability across APIs you don’t control
Evolve and modernize a production Flask + React application that serves hundreds of customers — improve architecture incrementally while shipping continuously
Design and build data-rich UIs: charts, dashboards, and interactive tools that help marketers understand complex experimental results
Collaborate closely with scientists and data engineers to translate statistical outputs into product experiences customers can act on
Use AI development tools as part of your daily workflow to accelerate delivery, explore solutions, and raise the ceiling on what you can ship
Participate in on-call rotation and own the operational health of the systems you build
Review code across the team and help set the bar for quality, clarity, and maintainability

Requirements

What you’ll need

5–10+ years of experience building and shipping production web applications and APIs
Strong across the full stack: you can build a well-structured API endpoint, write a database migration, and implement the frontend that consumes it
Proficiency in Python and React (or strong equivalents with willingness to ramp); experience with Flask, SQLAlchemy, or similar frameworks is a plus
Experience working in and improving large, established codebases — you’ve navigated legacy systems, made pragmatic tradeoffs between refactoring and shipping, and left things better than you found them
Comfort with cloud-native environments (GCP preferred): you understand how to deploy, monitor, and operate services in production
Experience with relational databases (MySQL/PostgreSQL) and data-heavy applications
Track record of working effectively with AI development tools (Claude, Cursor, Copilot, or similar) — you’ve integrated them into your workflow and can articulate how they change the way you build software
Strong product sense: you think about what customers need, not just what the ticket says
Excellent communication skills — you can explain technical tradeoffs clearly and work effectively with scientists, product managers, and other engineers.

Benefits

Comp & perks

Flexible PTO - take time when you need it!
Equity – Startup environment with part-ownership in our successes
Top of the line health, dental, and vision insurance - multiple plan options so you can pick what fits you best
WFH stipend to support the set up you need to be productive
Events & Offsites – opportunities to connect and celebrate in real life!
Free Lunch – Grab a bite on us when you choose to work from the office (hub locations include SF, NYC and Seattle)
New Parent Leave – take time to welcome your newest Hausmate

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

API designdatabase migrationsReactdata visualizationFlaskSQLAlchemyPythonrelational databasesMySQLPostgreSQL

Soft Skills

communication skillsproduct sensecollaborationproblem-solvingcode reviewoperational health ownershipadaptabilitycustomer focusteamworktechnical tradeoff explanation