Description:

PostHog is seeking a Backend Engineer for their Feature Flags team, with a focus on building systems that respond in single-digit milliseconds at scale.
The position is fully remote, available to candidates in time zones between GMT-8 and GMT+2.
The engineer will own the entire service from end-to-end, including design, build, deployment, and scaling of the feature flags evaluation engine.
Responsibilities include building and maintaining the feature flags evaluation engine, making high-level architecture decisions, optimizing performance bottlenecks, and working directly with customers to implement complex targeting rules.
The team is passionate about building world-class developer tools and embraces remote work.
The evaluation engine is written in Rust for performance, while the application layer uses Python/Django.

Requirements:

Candidates must have experience with any systems programming language and/or backend web frameworks, with Python and Rust being preferred but not required.
Experience in building systems that handle high volumes of requests/data (millions+ per minute) is essential.
The ability to quickly choose a sensible architecture and ship it faster than others is required.
A strong understanding of performance optimization techniques, caching strategies, and distributed systems principles is necessary.
Nice to have: experience with feature flag systems or similar real-time decision engines, experience dealing with incidents, comfort with provisioning and deploying infrastructure, experience with benchmarking and profiling tools, and knowledge of observability systems and practices.

The position offers generous and transparent compensation along with employee-friendly equity in PostHog.
Employees enjoy unlimited time off with a minimum of 25 days, with an average of 32 days taken in 2021.
Private medical insurance, including dental and vision, is provided for US and UK employees.
A pension plan with 401k contributions (4% matching) is available.
Generous parental, bereavement, and child loss leave is offered.
A training budget and free books are provided for professional development.
Employees receive a $200/month budget for co-working or café working and $300/month for team socials.
Mental health support is available through Spill mental health chat.
A $100/month budget is allocated to support open-source projects.
PostHog will act as the first investor for employees' projects.
Regular team off-sites are organized, with carbon offsetting for work travel.