<div> <div><section><details><summary><h2 id="about-posthog"><strong>About PostHog</strong></h2></summary><p>We’re equipping every developer to build successful products by giving them a suite of products to analyze, test, observe, and deploy new features. We currently offer product and web analytics, session replay, feature flags, experiments, a CDP, SQL access, a data warehouse, and LLM observability… and <a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/roadmap"><u>there’s plenty more to come</u></a>.</p> <p>PostHog was created as an open-source project during Y Combinator's W20 cohort. We had the most successful B2B software launch on HackerNews since 2012 with a product that was just 4 weeks old. Since then, more than 100,000 companies have installed the platform. We've had huge success with our paid upgrades, raised bags of money from some of the world's top investors, and have extremely strong product-led growth – 97% driven by word of mouth. </p> <p>We're growing quickly, but sustainably. We're <a target="_blank" rel="noopener noreferrer nofollow" href="http://www.paulgraham.com/aord.html"><u>also default alive</u></a>, averaging 10% monthly revenue growth and with more than $20m ARR. We're staying focused on building an awesome product for end users, hiring a handful of exceptional team members, and seeing fantastic growth as a result.</p> <p></p> <h3><strong>What we value</strong></h3> <ul> <li><p>We are<a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/handbook/company/values#we-are-open-source"> <u>open source</u></a> - building a huge community around a free-for-life product is key to PostHog's strategy.</p></li> <li><p>We aim to become <em>the</em> most transparent company, ever. In order to enable teams to make great decisions, we share as much information as we can. In our<a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/handbook"> <u>public handbook</u></a> <em>everyone</em> can read about our roadmap, how we pay (or even let go of) people, what our strategy is, and who we have raised money from. We also have regular team-wide feedback sessions, where we share honest feedback with each other.</p></li> <li><p>Working autonomously and maximizing impact - we don’t tell anyone what to do. Everyone chooses what to work on next based on what is going to have the biggest impact on our customers.</p></li> </ul> <p>Solve big problems - <a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/handbook/company/values#we-havent-built-our-defining-feature-yet"><u>we haven't built our defining feature yet</u></a>. We are all about acting fast, innovating, and <a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/handbook/company/culture#iteration"><u>iterating</u></a>.</p> <p></p></details><details><summary><h2 id="who-we're-looking-for"><strong>Who we’re looking for</strong></h2></summary><p>We're seeking a high-performance API engineer who thrives on the challenge of building systems that need to respond in single-digit milliseconds at scale. You're the type of engineer who gets excited about shaving microseconds off response times and designing elegant, efficient systems that can handle millions of requests per minute without breaking a sweat.<br></p> <p>The ideal candidate has experience with high-throughput, low-latency services similar to:</p> <ul> <li><p>Real-time bidding platforms</p></li> <li><p>Payment processing systems</p></li> <li><p>Recommendation engines</p></li> <li><p>Authentication services</p></li> <li><p>Content delivery networks</p></li> </ul> <p><br>You're not just a performance optimizer - you care deeply about clean architecture, observability, and creating APIs that developers love to use. You understand that in the feature flags world, your code is in the critical path of every customer's user experience, and you take that responsibility seriously.</p> <p></p></details><details><summary><h2 id="what-makes-this-role-unique"><strong>What makes this role unique </strong></h2></summary><p>Unlike many high-scale API engineering roles where you're maintaining a small part of a massive system, at PostHog you'll:</p> <ul> <li><p><strong>Own the entire service from end-to-end</strong>: Design, build, deploy, and scale the complete feature flags evaluation engine.</p></li> <li><p><strong>Build in the hot path with real impact</strong>: Your code runs in the critical path of our customers' applications, making a direct impact on their user experience.</p></li> <li><p><strong>Start from first principles</strong>: Scale up new services from the ground up rather than just maintaining existing infrastructure.</p></li> <li><p><strong>Set your own performance targets</strong>: You won't be constrained by other teams' requirements - you'll define and own the latency goals that make our customers successful.</p></li> <li><p><strong>See immediate results</strong>: Deploy optimizations and see the impact on performance metrics in real-time.</p></li> <li><p><strong>Work with cutting-edge tech</strong>: Our evaluation engine is written in Rust for maximum performance, while our application layer uses Python/Django.</p></li> </ul> <p></p></details><details><summary><h2 id="what-you'll-be-doing"><strong>What you'll be doing</strong></h2></summary><p>Our team is based in Seattle, but we embrace remote work and are open to candidates in PST through CET time zones. You'll collaborate with a distributed team that's passionate about building world-class developer tools.</p> <p><br>We're growing very quickly at PostHog, and our Feature Flags service is scaling rapidly. You'll be responsible for building and maintaining our feature flags evaluation engine that makes complex decisions based on person/group properties at high speed and scale.</p> <p><br>We recently rewrote the service in Rust and are working on adding new targeting features and continuing to improve the latency. You'll be working on a critical part of our infrastructure that customers rely on for real-time feature delivery. One day, you'll be making high-level architecture decisions, the next you'll be optimizing a performance bottleneck that slashes latency by 50%, and the day after you'll work directly with customers to implement complex targeting rules that meet their specific needs.</p> <p></p></details><details><summary><h2 id="requirements"><strong>Requirements</strong></h2></summary><ul> <li><p>Experience with any systems programming language and/or backend web frameworks. We use Python and Rust a lot–our app is written in Django, and the flags evaluation API is written in Rust–so experience in those languages is a plus, but not required</p></li> <li><p>You have experience building systems that handle high volumes of requests/data (millions+ per minute)</p></li> <li><p>You can choose a sensible architecture quickly, and then ship it faster than other people think is possible</p></li> <li><p>Strong understanding of performance optimization techniques, caching strategies, and distributed systems principles</p></li> </ul> <p><em>Nice to have</em></p> <ul> <li><p>Experience with feature flag systems or similar real-time decision engines</p></li> <li><p>You've carried a pager and have dealt with incidents</p></li> <li><p>You're comfortable with provisioning and deploying infrastructure</p></li> <li><p>Experience with benchmarking and profiling tools</p></li> <li><p>Knowledge of observability systems and practices</p></li> </ul> <p><em><br>We believe people from diverse backgrounds, with different identities and experiences, make our product and our company better. That’s why we dedicated a page in our handbook to</em><a target="_blank" rel="noopener noreferrer nofollow" href="https://posthog.com/handbook/company/diversity"><em><u> diversity and inclusion</u></em></a><em>. No matter your background, we'd love to hear from you! Alignment with our values is just as important as experience! 🙏</em></p> <p><em><br>Also, if you have a disability, please let us know if there's any way we can make the interview process better for you - we're happy to accommodate!</em></p> <p></p></details></section></div> <details><summary><h2 id="salary">Salary</h2></summary><p>We have a set system for compensation as part of being transparent. Salary varies based on location and level of experience.</p> <p><a href="#">Learn more about compensation</a></p> <div><div> <div> <div> <h3>Location</h3> <span>(based on market rates)</span><span><span></span></span> </div> <div> <div> <label id="headlessui-combobox-label-undefined">Country</label><div id="headlessui-combobox-button-undefined" tabindex="-1" aria-haspopup="listbox" aria-expanded="false"> <span></span> </div> </div> <div> <label id="headlessui-combobox-label-undefined">Region</label><div id="headlessui-combobox-button-undefined" tabindex="-1" aria-haspopup="listbox" aria-expanded="false"> <span></span> </div> </div> </div> </div> <div> <div><div> <div> <h3>Level</h3> <span><span></span></span> </div> <div><div id="headlessui-combobox-button-undefined" tabindex="-1" aria-haspopup="listbox" aria-expanded="false"> <span></span> </div></div> </div></div> <div><div> <div> <h3>Step</h3> <span><span></span></span> </div> <div><div id="headlessui-combobox-button-undefined" tabindex="-1" aria-haspopup="listbox" aria-expanded="false"> <span></span> </div></div> </div></div> </div> <div> <div><h3>Salary calculator</h3></div> <div> <ol> <li> <span>Benchmark (United States - San Francisco, California)</span> <span>$243,000</span> </li> <li> <span> Level modifier</span> <span>1</span> </li> <li> <span> Step modifier</span> <span>0.95 - 1.04</span> </li> </ol> <div id="compensation"> <span>Salary </span><span><span>$230,850 - $252,720</span><span>plus equity</span></span> </div> </div> </div> </div></div></details><details><summary><h2 id="benefits">Benefits</h2></summary><ul> <li> <span>Generous, transparent compensation &amp; equity</span> </li> <li> <span>Unlimited vacation (with a minimum!)</span> </li> <li> <span>Two meeting-free days per week</span> </li> <li> <span>Home office</span> </li> <li> <span>Coworking credit</span> </li> <li> <span>Private health, dental, and vision insurance.</span> </li> <li> <span>Training budget</span> </li> <li> <span>Access to our Hedge House</span> </li> <li> <span>Carbon offsetting</span> </li> <li> <span>Pension &amp; 401k contributions</span> </li> <li> <span>We hire and pay locally</span> </li> <li> <span>Company offsites</span> </li> </ul> <p>Get more details about all our benefits on the <a href="#">Careers page</a>.</p></details><details><summary><h2 id="mission-objectives">Your team's mission and objectives</h2></summary><div> <h2 id="q2-2025-objectives">Q2 2025 Objectives</h2> <h3 id="flag-stability-consistency-and-resiliency">Flag Stability, Consistency, and Resiliency</h3> <p><em>Goal: Create a highly stable, consistent, and resilient feature flag system capable of supporting 10x growth</em></p> <ul> <li> <p>Scale <code>/flags</code> service</p> <ul> <li>Complete 100% worldwide rollout of <code>/flags</code> endpoint to all customers</li> <li>Measure and validate improved query performance metrics</li> <li>Document infrastructure cost savings achieved</li> <li>Stretch: Investigate feasibility of decoupling flag evaluation from Postgres entirely</li> </ul> </li> <li> <p>Standardize SDK Error Handling and UX</p> <ul> <li>Move more SDK functionality to the server wherever possible (<a href="https://github.com/PostHog/posthog/issues/30466">reference</a>)</li> <li>Implement unified error handling framework across all SDKs</li> <li>Create consistent fallback and default behaviors across platforms</li> <li>Ensure all SDKs utilize the latest (v2) flags response format</li> </ul> </li> <li> <p>Enhance System Resilience</p> <ul> <li>Decouple flag service from writer database</li> <li>Deploy flags on differentiated infrastructure aligned with varying scale needs</li> <li>Implement circuit breakers for graceful degradation during upstream failures</li> <li>Establish reliability SLAs and monitoring for flag delivery</li> </ul> </li> </ul> <h3 id="behavioral-cohort-targeting">Behavioral Cohort Targeting</h3> <p><em>Goal: Enable customers to target feature flags based on user behaviors</em></p> <ul> <li> <p>Ship Beta Release</p> <ul> <li>Develop core behavioral targeting functionality</li> <li>Create intuitive UI for defining behavioral cohorts</li> <li>Implement backend services to process and apply cohort rules</li> </ul> </li> <li> <p>Customer Adoption</p> <ul> <li>Identify and onboard 5-10 key customers for beta testing</li> <li>Establish success metrics and collect usage data</li> <li>Document use cases and implementation patterns</li> <li>Create support resources for customer implementation</li> </ul> </li> </ul> <h2 id="ai-ide-integration">AI IDE Integration</h2> <p><em>Goal: Streamline developer workflow with AI-powered flag implementation</em></p> <ul> <li> <p>Create Intelligent Code Snippets</p> <ul> <li>Develop context-aware SDK snippet generation system for feature flags</li> <li>Ensure generated code follows best practices for each language/framework</li> </ul> </li> <li> <p>IDE Integration</p> <ul> <li>Build plugins/extensions for AI IDEs (Cursor, Windsurf, potentially our own)</li> <li>Create seamless workflow from flag creation to code implementation</li> <li>Implement AI-assisted troubleshooting for flag implementation issues</li> </ul> </li> <li> <p>Developer Experience</p> <ul> <li>Measure time-to-implementation improvements</li> <li>Collect developer feedback on integration experience</li> <li>Iterate based on usage patterns and pain points</li> </ul> </li> </ul> </div></details><details><summary><h2 id="interview-process">Interview process</h2></summary><div> <p>We do 2-3 short interviews, then pay you to do some real-life (or close to real-life) work.</p> <ul> <li> <div><span>1</span></div> <div> <h5>Application<span> (You are here)</span> </h5> <strong>Our talent team will review your application</strong><p>We're looking to see how your skills and experience align with our needs.</p> </div> </li> <li> <div><span>2</span></div> <div> <h5>Culture interview</h5> <strong>30-min video call</strong><p>Our goal is to explore your motivations to join our team, learn why you’d be a great fit, and answer questions about us.</p> </div> </li> <li> <div><span>3</span></div> <div> <h5>Technical interview</h5> <strong>45 minutes, varies by role</strong><p>You'll meet the hiring team who will evaluate skills needed to be successful in your role. No live coding.</p> </div> </li> <li> <div><span>4</span></div> <div> <h5>Founder interview</h5> <strong>30 minutes</strong><p>You have reached the final boss. It's time to chat with James or Tim.</p> </div> </li> <li> <div><span>5</span></div> <div> <h5>PostHog SuperDay</h5> <strong>Paid day of work</strong><p>You’ll meet a few more members of the team and work on an independent project. It's challenging, but most people say it's fun!</p> </div> </li> <li> <div><span>6</span></div> <div> <h5>Offer</h5> <strong>Pop the champagne (after you sign)</strong><p>If everyone is happy, we’ll make you an offer to join us - YAY!</p> </div> </li> </ul> </div></details><details><summary><h2 id="apply">Apply</h2></summary><div><div> <h4>(Now for the fun part...)</h4> <p>Just fill out this painless form and we'll get back to you within a few days. Thanks in advance!</p> <p><span>Bolded fields</span> are required</p> </div></div></details> </div>