Ask HN: Who is hiring? (October 2025)

Mozilla | Remote (US) | Principal Eng

My team is hiring for a really exciting position at Mozilla! We’re looking for a founding technical lead on a browser-automation effort for AI systems. This role is in the New Products division and has a lot of agency and autonomy.

This role will shape the long-term architecture and roadmap, write production-grade code across multiple languages, and build the core distributed systems and tooling. This is a rare and unique opportunity to set the direction and guide a high-leverage team, all while helping shape the future of interaction on the web.

Full job post here: https://mozilla.org/en-US/careers/position/gh/7230082/

Email jervin [@] mozilla.com and mention that you saw this on Ask HN: Who is hiring.

Jäntra Biosystems | Multiple Roles | San Francisco or Remote | Full-time | Salary + Equity

Jäntra Biosystems is revolutionizing protein structure prediction. We’re building AI models at the intersection of biology and computation. Join us as we unlock life’s molecular machinery.

Open Roles:

- AI Systems Engineer (C++ / CUDA / HPC)

- Structural Biologist / Bioinformatics Scientist (Cryo-EM / AlphaFold / Data Analysis)

What we’re looking for:

Engineers & scientists passionate about AI and biology. C++/CUDA expertise (AI Systems Engineer) or structural biology experience (Bioinformatics Scientist). Familiarity with HPC, GPU clusters, or structural prediction tools (AlphaFold, cryo-EM, etc.).

Why Jäntra: Competitive salary + equity San Francisco or remote Small, fast-moving team Work that matters: advance our understanding of life’s building blocks

Apply: https://jantra.ai/jobs.html email: hello@jantra.ai

Datadog | Software Engineers | ONSITE (Boston, Lisbon, Madrid, NYC, Paris, Tel Aviv) | Full-time

Datadog is a monitoring, tracing, logs system, and more, for your infrastructure and services. We build our own tsdb, event store [1][2], distributed tracing tools, cutting edge visualizations, and more. We love shipping great experiences for customers just like us and are growing fast! We write a lot of Go, Java, Python, Typescript (with React), and a bit of other languages. We run on k8s, and are multi-region and multi-cloud.

We're looking for people who can build systems at scale as we process trillions of events per day. Let us know if that's you!

https://dtdg.co/hnwhoshiring

[1] https://www.datadoghq.com/blog/engineering/introducing-husky

[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive

VIVA Finance | Atlanta, GA (In Person)| Front-End Developer

VIVA is a Fintech Startup based in Atlanta, GA with the mission to build a more inclusive financial system. VIVA offers unsecured personal loans to customers who have traditionally been excluded and taken advantage of by the legacy financial institutions. The VIVA difference is to underwrite heavily on employment history and set up repayments through voluntary direct deposit payments from the borrower's paycheck. Our interest rates are less than 1/3 of the rates our customers are able to get from other financing options.

We are a VC backed company and have been in business for 6 years. We have been profitable for the past year are a half. We are hiring an additional frontend engineer to support our increasing customer volume, as well as to support new products we plan to launch to diversify our revenue stream. You will join our engineering team of 10 and work in a dynamic environment where you are frequently writing net new code to support business objectives.

Our tech stack for the front-end is fully hosted on AWS. The web app is in React and we are building a mobile app with React Native, but experience with this specific stack is not necessary for talented candidates. Our preference is candidates who can come in office 4 days a week to our office on the Atlanta Beltline (next to Krog Street Market). VIVA does not provide visa sponsorship, so please have authorization to work in the USA.

Send an introduction to our hiring manger (alexa@viva-finance.com) with a resume and we will be in touch!

I also have this question, ads for remote should include either timezone requirements or geographical requirements, otherwise everyone wastes their time