<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: willempienaar</title><link>https://news.ycombinator.com/user?id=willempienaar</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Sun, 12 Apr 2026 11:04:50 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=willempienaar" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by willempienaar in "Native Instant Space Switching on macOS"]]></title><description><![CDATA[
<p>Yes. Alt-tab makes MacOS actually usable</p>
]]></description><pubDate>Thu, 09 Apr 2026 23:38:37 +0000</pubDate><link>https://news.ycombinator.com/item?id=47711719</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=47711719</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47711719</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (February 2026)"]]></title><description><![CDATA[
<p>Cleric | <a href="https://cleric.ai" rel="nofollow">https://cleric.ai</a> | Staff SWE, AI | Staff SWE, Product | Founding Marketer | Staff Designer | SWE, Backend | SF Onsite (Designer Remote)<p>Engineers can't keep up with their production environments: dozens of services, dashboards everywhere, alerts firing constantly. The information to diagnose most issues already exists, but finding it takes longer than fixing the problem. And the more AI-generated code ships, the more services get deployed by people who won't be around to debug them.<p>Cleric connects to your existing observability stack, autonomously investigates production incidents, and tells engineers what's wrong. We're well funded with years of runway, a small team of AI and infrastructure veterans in SF, growing quickly. Stack: Python, Go, LLMs, Kubernetes.<p>Some of the problems we work on:<p>There's no test suite in production. When the AI says "the root cause is X," how do you verify that? You can't A/B test diagnoses. Ground truth labels don't exist. We build evaluation systems that track resolution outcomes over weeks and correlate fixes with diagnoses to build statistical confidence.<p>When something breaks, everything looks broken. Database latency spikes, five services throw errors, CPU goes up, logs explode. When an agent sees 47 anomalies at once, it needs to figure out which one is the root cause and which are symptoms, across systems with feedback loops, hidden dependencies, and non-obvious temporal relationships.<p>A single investigation might need six hours of metrics across 50 services, 10GB of logs, 10,000 distributed traces, the last 30 deployments, and the relevant runbooks. LLMs have finite context windows. What's relevant isn't known until you investigate. Getting retrieval wrong means wrong conclusions or exploding costs.<p>We're hiring:<p>- Staff Software Engineer, AI: You build the core agent. Reasoning, evals, self-improving feedback loops. You debug agent behavior by tracing reasoning and tool choices to understand why the agent made a specific decision. You build the systems that make a non-deterministic agent reliable, and push it to handle increasingly complex incidents.<p>- Staff Software Engineer, Product: You define what an AI SRE should actually be. When AI handles the reasoning, how do engineers stay sharp for cases it can't handle? How do you build trust when someone needs to verify agent conclusions at 2AM? You answer these by embedding with customers during real incidents, running experiments, and making the technical calls to ship what works.<p>- Software Engineer, Backend: You build and scale the investigation platform alongside our senior engineers. Integrations with Datadog, PagerDuty, and dozens of observability tools. Agent reasoning pipelines. Runtime systems that handle real-time data streaming at scale. You'll ship customer-facing functionality across the stack.<p>- Founding Marketer: Software engineers are allergic to AI hype. Our users already love the product. The challenge is reaching the next thousand teams without setting off their BS detectors. You build the marketing function from scratch: programs, pipeline, infrastructure. You need a technical foundation and the ability to hold a 30-minute conversation with a platform engineering lead without getting lost.<p>- Staff Designer (Remote): The interfaces for AI agents don't exist yet. How do you make autonomous reasoning legible without overwhelming? You own design across brand, product, and marketing, defining the visual language for a new category.<p>Apply: <a href="https://jobs.ashbyhq.com/cleric" rel="nofollow">https://jobs.ashbyhq.com/cleric</a> | Email: willem-hn@cleric.ai<p>Willem, Co-founder & CTO</p>
]]></description><pubDate>Mon, 02 Feb 2026 18:30:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=46859424</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=46859424</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46859424</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (January 2026)"]]></title><description><![CDATA[
<p>Cleric | Staff SWE, AI | Staff SWE, Product | Head of Marketing | SF Onsite | $160K-$240K + Equity<p>Engineers can't keep up with their production environments: dozens of services, dashboards everywhere, alerts firing. The information to diagnose most issues exists, but finding it takes longer than fixing the problem. AI generated code is making this worse.<p>Cleric is an AI SRE that autonomously investigates production issues and surfaces findings to engineers. It connects to your existing tools, reasons through the evidence, and tells you what's wrong. We believe engineers should ultimately be accountable in production, and our goal is to help them go much faster.<p>The hard part is making agents reliable when there's no single right answer. We've built evals, memory systems, and feedback loops that improve with every incident. Gartner just named us a Cool Vendor, we are well funded with years of runway, and most importantly the engineers that use our product find it very sticky.<p>We're hiring the following roles:<p>- Staff SWE, AI: Build the reasoning engine. Design evals, debug agent behavior (not just code), expand what it can handle. You've built agents and operated distributed systems at scale.<p>- Staff SWE, Product: Define what AI SRE should be. Spend time with engineers during incidents, find gaps, decide what to build. You've owned products and know production pain.<p>- Head of Marketing: Engineers love the product but we need to reach more of them. Software engineers are allergic to AI hype, and you'll need to cut through it. Technical background required.<p>Apply: <a href="https://jobs.ashbyhq.com/cleric" rel="nofollow">https://jobs.ashbyhq.com/cleric</a>
Or email me: willem-hn@cleric.ai<p>Willem, Co-founder & CTO</p>
]]></description><pubDate>Sat, 03 Jan 2026 02:49:14 +0000</pubDate><link>https://news.ycombinator.com/item?id=46472301</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=46472301</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46472301</guid></item><item><title><![CDATA[New comment by willempienaar in "Logging sucks"]]></title><description><![CDATA[
<p>I kind of agree, but the message in this particular post does border on <a href="https://simonwillison.net/2024/Jul/13/give-people-something-to-link-to/" rel="nofollow">https://simonwillison.net/2024/Jul/13/give-people-something-...</a></p>
]]></description><pubDate>Sun, 21 Dec 2025 22:36:13 +0000</pubDate><link>https://news.ycombinator.com/item?id=46349305</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=46349305</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=46349305</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (June 2025)"]]></title><description><![CDATA[
<p>Cleric | <a href="https://cleric.ai" rel="nofollow">https://cleric.ai</a> | Staff Software Engineer | Full-Time | $160K–$220K | Onsite (San Francisco)<p>Cleric is an AI Site Reliability Engineer (SRE) that autonomously root causes production issues for engineering teams. Our AI agent frees engineers from time consuming investigations and context switching by reliably diagnosing and fixing problems in production environments.<p>We’re hiring a Staff Software Engineer to help us build a future where AI handles on-call support. You’ll join a small team of AI and infrastructure veterans in our sunny San Francisco office, working closely with the founding team to meet fast growing customer demand. Cleric is live in production with multiple customers and backed by top tier AI and infrastructure investors.<p>What is an AI SRE? → <a href="https://cleric.ai/blog/what-is-an-ai-sre" rel="nofollow">https://cleric.ai/blog/what-is-an-ai-sre</a><p>Role → <a href="https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5cc85e39e" rel="nofollow">https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5...</a><p>Email →  willem-hn@cleric.io<p>— Willem (Co-founder and CTO)</p>
]]></description><pubDate>Mon, 02 Jun 2025 20:39:46 +0000</pubDate><link>https://news.ycombinator.com/item?id=44162795</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=44162795</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44162795</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (December 2024)"]]></title><description><![CDATA[
<p>Cleric | <a href="https://cleric.io" rel="nofollow">https://cleric.io</a> | Staff Software Engineer | Full-Time | Onsite (San Francisco)<p>Cleric is an AI Site Reliability Engineer (SRE) that root causes production issues at machine speed, using the same tools engineers use today. We help engineers quickly locate and fix problems in production environments.<p>We're looking for builders who want to create a future where AI handles on-call and they can get back to building software. You'll work closely with a team of veteran AI and infrastructure builders in our San Francisco offices. We're live in production at multiple enterprises and backed by leading AI and infrastructure investors.<p>Staff Software Engineer: <a href="https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5cc85e39e">https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5...</a><p>Email: willem-hn@cleric.io<p>— Willem (Co-founder and CTO)</p>
]]></description><pubDate>Tue, 03 Dec 2024 06:01:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=42303379</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=42303379</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42303379</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (November 2024)"]]></title><description><![CDATA[
<p>Cleric | <a href="https://cleric.io" rel="nofollow">https://cleric.io</a> | Software Engineers, Platform & Product | Full-Time | Onsite (San Francisco)<p>Cleric is an AI Site Reliability Engineer (SRE) that diagnoses production issues at machine speed, using the same tools engineers use today. We're live in production at major enterprises and backed by leading AI infrastructure investors.<p>Our vision is to free engineers from operational toil entirely. Production systems have become too complex and fast-moving for human operators - we're building Cleric to handle this complexity autonomously, letting engineers focus on building products.<p>Roles:<p>- Software Engineer, Product: <a href="https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5cc85e39e">https://jobs.ashbyhq.com/Cleric/131dd323-6d76-4d79-9cc5-f3b5...</a><p>- Software Engineer, Platform: <a href="https://jobs.ashbyhq.com/Cleric/bf48c037-56dc-4237-bfe3-fe0c779bd66d">https://jobs.ashbyhq.com/Cleric/bf48c037-56dc-4237-bfe3-fe0c...</a><p>We're looking for builders who want to create a future where AI handles operations and engineers can get back to building. You'll join a team of veteran AI and infrastructure builders working closely out of our San Francisco office.<p>Email: willem-hn@cleric.io<p>— Willem (CTO, Cleric)</p>
]]></description><pubDate>Fri, 01 Nov 2024 17:08:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=42019163</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=42019163</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42019163</guid></item><item><title><![CDATA[New comment by willempienaar in "Ask HN: Who is hiring? (July 2024)"]]></title><description><![CDATA[
<p>Cleric | Multiple Roles | San Francisco | Full-time | $160K-$200K + 0.5%-1.5% equity | Visa Sponsorship<p>At Cleric we're building an AI-powered agent that helps engineers quickly diagnose and resolve production issues, freeing them up from operational toil. We've raised a $4.3m seed from a leading AI VC and Silicon Valley angels.<p>The ideal candidate loves building tools for engineers, and is obsessed with generative AI. You'll join a team of AI, software, and infrastructure veterans working in-person from San Francisco.<p>Email me (CTO) at willem@cleric.io or apply at <a href="https://jobs.ashbyhq.com/cleric">https://jobs.ashbyhq.com/cleric</a></p>
]]></description><pubDate>Mon, 01 Jul 2024 19:34:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=40849679</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=40849679</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=40849679</guid></item><item><title><![CDATA[New comment by willempienaar in "Writing a Custom Input Connector"]]></title><description><![CDATA[
<p>While everyone is focusing on LLMs, the folks at Bytewax are quietly shipping tech that is both accessible and robust. Great to see.</p>
]]></description><pubDate>Fri, 21 Apr 2023 03:26:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=35649513</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=35649513</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=35649513</guid></item><item><title><![CDATA[New comment by willempienaar in "Show HN: Bytewax – Python Stateful Stream Processing on Timely Dataflow"]]></title><description><![CDATA[
<p>Been following this project for a while. There's a reason why it's making waves in developer circles - You get a simple to use Python developer experience with a powerful distributed data processing framework that scales to enormous workloads. Plus its battle tested since it relies on Timely Dataflow under the hood.</p>
]]></description><pubDate>Fri, 15 Jul 2022 23:23:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=32113796</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=32113796</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=32113796</guid></item><item><title><![CDATA[New comment by willempienaar in "Empowering data scientists with a feature store"]]></title><description><![CDATA[
<p>It may be worth reading this article to get an idea of what feature stores are and how they are used <a href="https://feast.dev/blog/what-is-a-feature-store/" rel="nofollow">https://feast.dev/blog/what-is-a-feature-store/</a></p>
]]></description><pubDate>Sun, 10 Oct 2021 16:48:58 +0000</pubDate><link>https://news.ycombinator.com/item?id=28819851</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=28819851</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28819851</guid></item><item><title><![CDATA[Feast 0.10]]></title><description><![CDATA[
<p>Article URL: <a href="https://feast.dev/blog/feast-0-10-announcement/">https://feast.dev/blog/feast-0-10-announcement/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=26824476">https://news.ycombinator.com/item?id=26824476</a></p>
<p>Points: 1</p>
<p># Comments: 0</p>
]]></description><pubDate>Thu, 15 Apr 2021 18:36:52 +0000</pubDate><link>https://feast.dev/blog/feast-0-10-announcement/</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=26824476</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=26824476</guid></item><item><title><![CDATA[A State of Feast]]></title><description><![CDATA[
<p>Article URL: <a href="https://blog.feast.dev/post/a-state-of-feast">https://blog.feast.dev/post/a-state-of-feast</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=24931596">https://news.ycombinator.com/item?id=24931596</a></p>
<p>Points: 2</p>
<p># Comments: 0</p>
]]></description><pubDate>Thu, 29 Oct 2020 15:33:04 +0000</pubDate><link>https://blog.feast.dev/post/a-state-of-feast</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=24931596</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=24931596</guid></item><item><title><![CDATA[New comment by willempienaar in "What Is a Feature Store?"]]></title><description><![CDATA[
<p>Co-author here. Happy to answer any questions!</p>
]]></description><pubDate>Wed, 21 Oct 2020 14:46:59 +0000</pubDate><link>https://news.ycombinator.com/item?id=24848387</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=24848387</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=24848387</guid></item><item><title><![CDATA[What Is a Feature Store?]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.tecton.ai/blog/what-is-a-feature-store/">https://www.tecton.ai/blog/what-is-a-feature-store/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=24847994">https://news.ycombinator.com/item?id=24847994</a></p>
<p>Points: 50</p>
<p># Comments: 6</p>
]]></description><pubDate>Wed, 21 Oct 2020 14:06:00 +0000</pubDate><link>https://www.tecton.ai/blog/what-is-a-feature-store/</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=24847994</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=24847994</guid></item><item><title><![CDATA[Feast: Bridging ML Models and Data]]></title><description><![CDATA[
<p>Article URL: <a href="https://blog.gojekengineering.com/feast-bridging-ml-models-and-data-efd06b7d1644">https://blog.gojekengineering.com/feast-bridging-ml-models-and-data-efd06b7d1644</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=22296572">https://news.ycombinator.com/item?id=22296572</a></p>
<p>Points: 6</p>
<p># Comments: 0</p>
]]></description><pubDate>Tue, 11 Feb 2020 06:41:47 +0000</pubDate><link>https://blog.gojekengineering.com/feast-bridging-ml-models-and-data-efd06b7d1644</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=22296572</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=22296572</guid></item><item><title><![CDATA[New comment by willempienaar in "Jenkins X: a CI/CD solution for cloud applications on Kubernetes"]]></title><description><![CDATA[
<p>I agree.<p>To add to that, GitOps as defined by Weaveworks and Kelsey Hightower is a technology agnostic approach.</p>
]]></description><pubDate>Tue, 24 Apr 2018 15:07:09 +0000</pubDate><link>https://news.ycombinator.com/item?id=16913179</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=16913179</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=16913179</guid></item><item><title><![CDATA[New comment by willempienaar in "Why I left Google to join Grab"]]></title><description><![CDATA[
<p>Best bet to learn about our ML systems is at (and after) talks we do in Singapore.</p>
]]></description><pubDate>Fri, 26 Jan 2018 15:52:57 +0000</pubDate><link>https://news.ycombinator.com/item?id=16240066</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=16240066</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=16240066</guid></item><item><title><![CDATA[New comment by willempienaar in "Why I left Google to join Grab"]]></title><description><![CDATA[
<p>Good point. I work on the Data Science team, but I will pass along your comment and suggestion to  the relevant product team.</p>
]]></description><pubDate>Wed, 24 Jan 2018 14:58:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=16223133</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=16223133</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=16223133</guid></item><item><title><![CDATA[New comment by willempienaar in "Show HN: Ctxt.io – share context of whatever you see with others in seconds"]]></title><description><![CDATA[
<p>A side project of mine requires similar functionality in terms of copying and pasting text. I would like to see how you implemented it.</p>
]]></description><pubDate>Fri, 24 Mar 2017 04:07:39 +0000</pubDate><link>https://news.ycombinator.com/item?id=13946532</link><dc:creator>willempienaar</dc:creator><comments>https://news.ycombinator.com/item?id=13946532</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=13946532</guid></item></channel></rss>