Ask HN: Who is hiring? (December 2025)

Jam.dev | Staff Fullstack Engineer & AI Product Engineer | Typescript/React | Remote (+ in person in SF, Austin, NYC) | Full-time Dev tools company with 200,000+ users in 2 years. $10M in funding from Vercel CEO, GitHub CTO, Cloudflare CEO, etc. We’re building a flight recorder for web apps – so anyone can report issues to engineers in a way that's actually debuggable (w/ console, network, websockets debugger, etc). Small, senior team – several ex-engineering directors turned ICs (mostly ex-early Cloudflare). Looking for staff-level engineers with experience building highly performant front-end apps. Stack: React/Typescript and MobX (MST) on the frontend, and Node/GraphQL across our backend. The challenge ahead: Scaling. Usage 10x’ed last year, and our users are in 176 countries, on all sorts of devices, network conditions, etc. Our bar for quality is high. As a dev tool, developers at Jam are directly connected and involved with the product. Your usage of the product will directly inform the direction of Jam’s future. Apply here (we read and respond to every submission): https://jam.dev/careers

Renaissance Philanthropy | Research Engineer / MLE / Full-stack | Remote (worldwide) Renaissance Philanthropy's aim is to activate a virtuous circle of increasing ambition and impact between philanthropists and innovators: by identifying frontier experts both in science and in new ways of solving problems; by tapping into the growing number of emerging philanthropists; and by building multi-sector initiatives that can harness the power of philanthropy, markets, and governments. RenPhil's Engineering Hub supports mission-driven, grant-funded educational technology projects that seek to improve educational outcomes in fundamental skills like math and reading. The Engineering Hub consists of data scientists, machine learning engineers, and full-stack developers who collaborate with researchers and entrepreneurs to build scalable, measurably effective tools for teachers and students. We’re looking for folks who: - can speak the languages of both research and engineering - are creative problem solvers - are comfortable with navigating ambiguity - want to help create a world where all children receive a high-quality education. If this sounds like you, please apply! https://www.renaissancephilanthropy.org/careers

MaFi Games | Senior ASP.NET (full-stack) | Contract | Remote Hi, I'm the co-founder of MaFi Games, the indie studio behind Captain of Industry. We're looking for an experienced full-stack ASP.NET engineer to help us grow our community website, including features like a modding database, blog, and forum. Some reasons you'd enjoy working with us: - A multicultural, collaborative, and innovative work environment where your voice is heard. - Fully remote job with flexible working hours and vacation schedule. - High quality C# code base, code reviews, tests. - High work satisfaction, work with a talented team on a popular video game with a wonderful community. If interested, please see the detailed info, requirements, and application instructions at https://www.captain-of-industry.com/jobs-swe-hn, thanks! Note: We are also looking for Senior Game devs, 2D artists, and SFX artists.

Internet Archive | Senior Datacenter Network Infrastructure Engineer | On-site SF Preferred | https://archive.org The Internet Archive is looking for a datacenter & network engineering to help us with our physical datacenters (one is a converted church in SF!) and networking stack. We have a global site pushing 100s of gigabits out of on-prem and bare metal, adding 150TB a day of new data. More info and application at https://workforcenow.adp.com/mascsr/default/mdf/recruitment/... , but please email me at kevin.oconnor@archive.org for more info or a quick chat about the position!

PostHog | Full-Time | Product engineers, backend engineers, Technical AMs | REMOTE (all remote) | Hiring GMT-8 to GMT+2 PostHog equips developers to build successful products by combining product analytics, feature flags, session replay, a data warehouse, CDP and many more. * we have a public handbook (posthog.com/handbook) if you want to learn how we work, pay and more in complete detail. * we are growing through more autonomy and transparency not through process. * we have a ton of scale and a bunch of super interesting technical problems to solve * we're building 20 more products over the next couple of years, so you could end up building one of those * public compensation calculator! see immediately what you'd get paid * we're hiring: product engineers, clickhouse operations engineer, backend engineers, product managers, technical account managers and technical customer success managers. https://posthog.com/careers