# Senior Software Engineer, Experimentation

**Company**: Mixpanel
**Location**: San Francisco, US
**Work arrangement**: hybrid
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology

**Apply**: https://job-boards.greenhouse.io/mixpanel/jobs/8124704?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_a1066466-d2a

## Description

As a Senior Software Engineer on the team, you'll own the technical design and delivery of features across Experiments, Feature Flags, Session Replay, and Heatmaps.

You'll work across the full stack, from React frontend experiences to Python backend services to high-throughput systems like flag evaluation and replay ingestion.

Your responsibilities will include:

- Owning technical design for complex features end to end

- Making well-reasoned technical decisions that balance speed, quality, cost, and product considerations

- Driving reliability, observability, and operational excellence for services that customers depend on in production

- Partnering with AI Engine to bring AI into how customers design, run, and understand experiments and replays

- Collaborating with Product Platform and other teams on SDKs, shared infrastructure, and architectural decisions that affect the broader platform

- Mentoring engineers on the team through code reviews, pairing, and 1:1 support

- Serving as an escalation point for complex bugs and on-call incidents in the team's domain

- Working with Support and Solutions Engineering on customer escalations and technical questions from prospects

- Partnering with Product and Design to identify and lead areas of future work beyond the current roadmap

We're looking for someone with:

- A Bachelor's degree in Computer Science, Mathematics, a related field, or equivalent practical experience

- 5+ years of professional software engineering experience with a proven track record of delivering quality solutions with speed

- Experience building and operating production systems end to end, with real ownership of reliability and correctness in a product customers depend on

- Expert-level depth in at least one area (systems, web, or data infrastructure) with broad understanding of full-stack architecture

- Experience owning technical design for complex projects and managing multiple concurrent workstreams

- Strong cross-functional collaboration skills

- Sound judgment in setting priorities, selecting technologies, and making tradeoffs that factor in technical, product, and business considerations

- A track record of mentoring other engineers and contributing to team growth

- Strong technical communication, ideally with experience collaborating in an asynchronous remote environment

Bonus points for:

- React / TypeScript experience

- Django / Python experience

- Experience with experimentation, feature flagging, or session replay products

- Experience building high-throughput, low-latency services

- Familiarity with analytics or observability platforms

- Experience building with LLMs, AI agents, or tool-use frameworks

- Comfort using AI coding tools in your daily work

Benefits and perks include:

- Comprehensive Medical, Vision, and Dental Care

- Mental Wellness Benefit

- Generous Vacation Policy & Additional Company Holidays

- Enhanced Parental Leave

- Volunteer Time Off

- Additional US Benefits: Pre-Tax Benefits including 401(K), Wellness Benefit, Holiday Break

## Skills

### Required
- Python
- React
- TypeScript
- Django
- full-stack architecture
- systems
- web
- data infrastructure

### Nice to have
- LLMs
- AI agents
- tool-use frameworks
- analytics platforms
- observability platforms

---

Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/mixpanel/jobs/8124704?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)