Senior Backend Engineer

San Francisco Bay Areasenior

EngineeringOtherBackend EngineeringSenior Backend Engineer

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Overview

Why Weave Exists At Weave, our mission is to evolve how therapeutic knowledge is captured, transformed, and communicated throughout drug development.

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EngineeringOtherBackend EngineeringSenior Backend Engineer

At Weave, our mission is to evolve how therapeutic knowledge is captured, transformed, and communicated throughout drug development. We do this by equipping human experts with AI instruments to enable drugs to be brought to patients as rapidly, safely, and inexpensively as possible.

The Weave Platform streamlines regulatory workflows from start to finish by intelligently, creatively, and effectively infusing every step with AI. Together with our customers, Weave is designing and building the AI workbench for the entire therapeutic lifecycle.

We’re looking for a Senior Backend Engineer, reporting directly to the Backend Engineering Manager, that can navigate between data, AI, and backend systems. Stability, performance, and reliability of the AI system are the core responsibilities. You will be asked to develop novel solutions to customer problems, characterize the results, and deliver the solutions into production. You’ll be successful in this role if you can go from idea, to experiment, to testing, to production without getting lost or stuck at one of the steps. We care more about solving problems than using the latest buzz. We prefer simple, well-tested, stable solutions that are dependable, yet impressive.

Understanding customer problems and translating that into simple solutions
Working with Product and Design to quickly find solutions
Writing performant, simple code. We run Django + Python + Postgres + Redis.
Managing ongoing conceptual and technical complexity while delivering value on Product projects
Integrating and optimizing LLM APIs (OpenAI, Anthropic) for document processing and AI features

5+ years of Django in production with strong fundamentals in database optimization, caching, and system design
Hands-on LLM experience — you've integrated OpenAI/Anthropic APIs directly, understand prompt engineering, and can debug model behavior
SAAS product experience on highly scalable products
Strong knowledge and experience with AWS deployment practices and concepts
Product-focused mindset — you balance speed and quality, make pragmatic trade-offs, and ship solutions that solve customer problems
Production ownership — comfortable with on-call, debugging live issues, and taking responsibility for the systems you build
Low ego, high output — collaborative, adaptable, and focused on team success over individual heroics
Bonus: Early-stage startup experience, regulated domain experience (healthcare/pharma), or real-time collaborative systems

What We Offer

~1 min read

🎯 The opportunity to work at a modern, cutting-edge healthcare technology company devoted to meaningful positive impact on human life. Collaboration, velocity, and customer obsession are our baseline, demonstrations of craftsmanship and ROI are celebrated.

🏆 Competitive salary ($175,000 - $225,000) and equity packages.

🧬 Comprehensive health, dental and vision insurance

🏝️ Take care of you and yours: generous PTO, parental leave, OneMedical, TalkSpace, Teladoc.

🚀 Career development opportunities within a company entering a growth phase.

🌎 Hybrid in San Francisco with in-office days Tues/Wed/Thurs and flexibility to work remote Mon/Fri.

Equal Opportunity Employer: We are committed to creating a diverse environment and are proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

This organization participates in e-Verify:

Notice of E-Verify Participation

Notice of Right to Work