Weave · 4 hours ago
Senior Software Development Engineer in Test (SDET)
San Francisco, CA
Full-time
Hybrid
Senior Level
$175K/yr - $215K/yr
5+ years expWeave Bio is dedicated to transforming drug development through innovative AI solutions. They are seeking a Senior Software Development Engineer in Test (SDET) to own the quality infrastructure across all products, designing and maintaining an end-to-end test suite that ensures reliability and speed in the deployment process.
BiotechnologyArtificial Intelligence (AI)Life Science
Responsibilities
Design and build the end-to-end test architecture across all of Weave's products
Own the full test pyramid strategy, determine what gets tested at which layer and why
Build shared utilities, fixtures, and abstractions that make writing reliable tests easy for every engineer
Architect test data management, environment provisioning, and isolation strategies that eliminate flakiness at the source
Maintain a high-signal, flake-free suite, own flake detection, root cause analysis, and systematic elimination
Optimize execution time so tests remain a fast feedback loop, not a bottleneck
Build and maintain CI/CD integration so the suite runs on every PR and blocks merges when it should
Monitor suite health with dashboards and alerting; treat reliability as a metric, not a feeling
Partner with product engineering teams to ensure new features ship with comprehensive, maintainable coverage
Define testing standards and best practices across the organization
Identify gaps in coverage and prioritize them based on risk and customer impact
Qualification
Required
5+ years of professional software engineering experience with a focus on quality, test infrastructure, or a combination of product engineering and test automation
Proficient in TypeScript. You should be as comfortable in it as any frontend engineer on the team
Proficient in at least one server-side language (Python preferred) for tooling, scripting, data seeding, and API-level testing
You understand how web applications work end-to-end: browsers, networks, APIs, databases, auth flows, and you know where each layer can break
Expert-level Playwright knowledge; not just usage, but internals, quirks, and best patterns at scale
Deep experience with auto-waiting, selector strategies, network interception, multi-context testing, and trace debugging
You've built custom fixtures, reporters, and integrations and have strong opinions on how to structure a large Playwright suite for maintainability
You actively use AI-powered development tools (Cursor, Claude, etc.) to accelerate test creation, maintenance, and debugging
Ideal candidates have direct experience using AI to generate E2E tests from specs or user flows and have developed workflows to keep AI-generated tests at a high quality bar
You have the fundamentals to know when a generated test is actually testing what it claims to, and when it's just green by coincidence
You're pragmatic about coverage; you optimize for confidence-per-minute-of-CI-time, not a vanity percentage
You've worked in a fast-moving startup environment where you had to build testing culture, not just inherit it
You communicate clearly with product engineers about quality tradeoffs without being a gatekeeper
Preferred
Experience testing real-time collaborative features (WebSockets, CRDTs, multiplayer UIs)
Experience in regulated domains where test traceability and compliance documentation matter
Contributions to open-source testing tools or Playwright ecosystem plugins
Benefits
Comprehensive health, dental and vision insurance
Generous PTO, parental leave, OneMedical, TalkSpace, Teladoc
Career development opportunities within a company entering a growth phase.
Company
Weave
Weave Bio is an AI-native platform transforming regulatory workflows and accelerating how novel therapies reach patients faster.
11-50 employees
H1B Sponsorship
Weave has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
Funding
Current Stage
Early StageTotal Funding
$43MKey Investors
U.S. Venture PartnersInnovation Endeavors,Magnetic Ventures
2025-10-16Series A· $20M
2024-05-30Seed· $10M
2023-12-22Seed· $11.4M
Leadership Team
Ari Caroline
CEO, Co-founder
Umut Eser
CTO and Cofounder
Recent News
thesaasnews.com
2025-10-18
2025-10-18
2025-10-18
Company data provided by crunchbase