Senior Software Engineer, Experimentation

About Mixpanel

Mixpanel is the leading product intelligence and analytics platform trusted by more than 29000 companies to help understand how people use the products they build. By combining powerful analytics with AI that knows your business Mixpanel helps teams see whats working diagnose whats not and decide what to build next. Learn more at .

Our team owns the products that help teams test ship and observe what they build: Experiments Feature Flags Session Replay and Heatmaps. Our vision is to make Mixpanel the one place where product teams roll out a change measure its impact see how real users experience it and decide what to do next all on the same event data they already trust.

These products are one of Mixpanels most promising paths to growth. They extend Mixpanel from understanding what users do to acting on it and theyre a big part of how our customers grow with us. They also matter more in the AI era not less. Teams are shipping faster than ever and they need tools that tell them just as fast whether what they shipped is working.

What we own:

• Experiments: Controlled experiments that run on the same behavioral data customers already analyze in Mixpanel with results teams can trust when they decide what to ship
• Feature Flags: Safe gradual rollouts targeted by real user behavior powered by a high-throughput evaluation service that runs in the critical path of our customers products
• Session Replay and Heatmaps: A view of how real people experience a product across web and mobile so teams can see the why behind the numbers

As a Senior Software Engineer on the team youll own the technical design and delivery of features across Experiments Feature Flags Session Replay and Heatmaps. Youll work across the full stack from React frontend experiences to Python backend services to high-throughput systems like flag evaluation and replay ingestion. Youll partner directly with Product and Design to shape where these products go next and collaborate with teams like AI Engine and Product Platform on shared systems and the SDKs that power our products.

This is a high-impact role on a small senior team where youll have significant influence over the technical direction of products that are central to Mixpanels growth.

• Own technical design for complex features end to end from backend services and data models to frontend experiences
• Make well-reasoned technical decisions that balance speed quality cost and product considerations anticipating problems and developing contingency plans
• Drive reliability observability and operational excellence for services that customers depend on in production addressing tech debt before it becomes a long-term problem
• Partner with AI Engine to bring AI into how customers design run and understand experiments and replays
• Collaborate with Product Platform and other teams on SDKs shared infrastructure and architectural decisions that affect the broader platform
• Mentor engineers on the team through code reviews pairing and 1:1 support helping them grow technically
• Serve as an escalation point for complex bugs and on-call incidents in the teams domain
• Work with Support and Solutions Engineering on customer escalations and technical questions from prospects
• Partner with Product and Design to identify and lead areas of future work beyond the current roadmap

• Bachelors 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: you work effectively with other teams and organizational stakeholders with little guidance
• 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
• A desire to help teams build and decide faster in the AI era

• React / TypeScript experience
• Django / Python experience
• Experience with experimentation feature flagging or session replay products as a builder or a heavy user
• 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 (Claude Code Cursor etc.) in your daily work

Additional Resources

• Engineering Life Page
• Engineering Blog

Benefits and Perks

• 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

*please note that benefits and perks for contract positions will vary*

Culture Values

• Make Bold Bets: We choose courageous action over comfortable progress.
• Innovate with Insight: We tackle decisions with rigor and judgment - combining data experience and collective wisdom to drivepowerful outcomes.
• One Team: We collaborate across boundaries to achieve far greater impact than any of us could accomplish alone.
• Candor with Connection: We build meaningful relationships that enable honest feedback and direct conversations.
• Champion the Customer: We seek to deeply understand our customers needs ensuring their success is our north star.
• Powerful Simplicity: We find elegant solutions to complex problems making sophisticated things accessible.

Why choose Mixpanel

Were a leader in analytics with over 29000 customers and $277M invested from prominent investors: like Andreessen-Horowitz Sequoia YC and most recently Bain Capital. Mixpanels pioneering event-based data analytics platform offers a powerful yet simple solution for companies to understand user behaviors and easily track overarching company success metrics. Our accomplished teams continuously facilitate our expansion by tackling the ever-evolving challenges tied to scaling reliability design and service. Choosing to work at Mixpanel means youll be helping the worlds most innovative companies learn from their data so they can make better decisions.

Mixpanel is an equal opportunity employer supporting workforce diversity. At Mixpanel we are focused on things that really matterour people our customers our partnersout of a recognition that those relationships are the most valuable assets we have. We actively encourage women people with disabilities veterans underrepresented minorities and LGBTQ people to apply. We do not discriminate on the basis of race religion color national origin gender gender identity or expression sexual orientation age marital status veteran status or disability status. Pursuant to the San Francisco Fair Chance Ordinance or other similar laws that may be applicable we will consider for employment qualified applicants with arrest and conviction records. Weve immersed ourselves in our Culture and Values as our guiding principles for the impact we want to have and the future we are building.