Senior Backend Engineer
- Company
- Seed stage B2B SaaS, 18 employees, 7 engineers
- Reports to
- CTO / Cofounder
- Location
- Hybrid, San Francisco (2 days in office)
- Comp range
- $185K to $215K base plus equity
The mission
Own the core API and data layer so the product can scale from 50 customers to 500 without a rewrite.
What success looks like
| Timeframe | Outcome |
|---|---|
| 30 days | Ships first production feature, fully onboarded to the codebase and deploy process |
| 90 days | Owns the API layer end to end, leads one architecture decision with a written design doc |
| 6 months | Cuts p95 API latency in half, mentors 1 to 2 mid-level engineers |
Must haves
- 5+ years backend experience, with at least 2 at a startup under 100 people
- Production experience with Python or Go and PostgreSQL
- Has designed and scaled APIs serving real customer traffic
- Comfortable with ambiguity and shipping without a dedicated PM
Nice to haves
- Event driven architecture (Kafka, SQS)
- Prior early engineer or founding team experience
- B2B SaaS or fintech domain experience
Dealbreakers
- Only worked inside large company infrastructure with dedicated platform teams
- Needs a fully defined roadmap to be productive
- Comp expectations above $230K base
Competencies and who evaluates them
| Competency | What we're looking for | Interview stage |
|---|---|---|
| Technical depth | Designs systems that hold up under growth | Technical screen, system design |
| Ownership | Takes problems end to end without being asked | Hiring manager interview |
| Communication | Explains tradeoffs clearly to non engineers | Cofounder interview |
| Startup fit | Thrives with speed, ambiguity, and small teams | Recruiter screen, all stages |
| Coaching | Makes the engineers around them better | Team panel |
Rating scale
- 1Strong no: clear gaps on must haves
- 2Lean no: some strengths, meaningful concerns
- 3Lean yes: meets the bar, minor questions remain
- 4Strong yes: exceeds the bar, a great hire
Decision rule: We move forward only if no interviewer scores a 1 and the average across competencies is 3 or higher. Every interviewer submits written feedback within 24 hours.
Every scorecard is built from scratch with you during calibration. This is a sample, not a template.