Checkr | Software Engineer (multiple) | Hybrid | San Francisco, CA & Denver, CO & Santiago, CL| Full-time

Checkr (YC S14) is hiring across multiple roles, located in our San Francisco, Denver, and Santiago offices. Checkr builds people infrastructure for the future of work. We've designed a faster—and fairer—way to screen job seekers. Established in 2014, Checkr puts modern technology powered by machine learning in the hands of hiring teams, helping to hire great new people with an experience that’s fast, smooth, and safe. Checkr has over 100,000 customers including DoorDash, Coinbase, Lyft, Instacart, and Airtable.

A career at Checkr means collaborating with brilliant minds, disrupting an industry, and opening channels of employment to often overlooked candidates. Checkr is recognized on Forbes Cloud 100 2025 List and is a Y Combinator 2024 Breakthrough Company.

Here's a selection of roles:

Software Engineer (SF/Denver): https://grnh.se/qc3k3i6f1us

Senior Software Engineer (SF/Denver): https://grnh.se/l23t79if1us

Engineering Manager (SF/Denver): https://grnh.se/9m52v0151us

Staff Reliability Engineer (Chile): https://grnh.se/r7wj6h6x1us

Staff Product Manager (SF/Denver): https://grnh.se/besth6lw1us

Sr. Director, Product (SF/Denver): https://grnh.se/xexlcik21us

I'm a Sr. Staff product manager here in our SF office 2x/wk. Happy to answer questions you might have!

All jobs: https://grnh.se/f3c7e1c61us

Artificial Analysis | https://artificialanalysis.ai | Full Stack Engineer, ML Engineer, Member of Technical Staff | Onsite in San Francisco or in Australia/New Zealand | Competitive Salary + Equity

Artificial Analysis is an independent AI benchmarking and insights provider. We benchmark AI to help engineers and companies understand AI and make informed decisions regarding which AI technologies to use. We are fast growing with a team of 20 and have backing from investors including Nat Friedman, Daniel Gross & Andrew Ng.

We are hiring for four roles:

1. Full Stack Engineer: Full Stack Engineer to support our benchmarking of AI and with communicating these benchmarks to our users. Proficiency in Typescript & Python required. Familiarity with LLM APIs preferred. Tech stack: Javascript/Typescript, Node.js, React/Next.js, Python.

2. ML Engineer: ML Engineer to support our benchmarking and evaluation of AI software stack. You will design and run benchmarks and evaluations of different AI models. Strong analytical skills and proficiency in Python required.

3. Member of Technical Staff: You will design evaluations of different AI models and work to translate technical insights to analysis that helps companies navigate AI.

Apply at hiring (-at-) artificialanalysis.ai with your resume, github and dot points on relevant experience (including anything you've built). Add | HackerNews to email subject line.

Sphinx Defense | Engineering, DevOps, & Product | Remote (US Only), DC, Colorado Springs, LA | https://www.sphinxdefense.com

Sphinx Defense builds software to solve complex national security problems for America and its allies. Founded by engineers and technologists with deep experience across commercial and defense technology, we're building a vehicle-agnostic communication infrastructure to enable satellite operators to securely utilize antenna networks and maneuver satellites in real-time. We're bootstrapped, profitable, and growing aggressively.

To learn more about who we are, our engineering culture, and whether this is the right place for you, read our Key Values profile: https://www.keyvalues.com/sphinx-defense

Our current openings are: Sr. Backend Engineer - Colorado Springs : https://grnh.se/dx02hydm8us

Sr. Backend Engineer - Remote : https://grnh.se/dx02hydm8us

Product Manager - Colorado Springs - https://grnh.se/dx02hydm8us

Program Manager - Colorado Springs - https://grnh.se/dx02hydm8us

Sr. Program Manager - Colorado Springs - https://grnh.se/dx02hydm8us

Don’t see a role that aligns with your interests or don’t have the specific Space/ Command & Control experience? Apply to the general interest application and list what type of role you would be interested in : https://grnh.se/4ce199d68us

NeuroVRD | Quality Assurance Engineer | Remote | Contractor + Equity We're building the Sentinel AI-IONM system: an AI-driven system that monitors neurovascular integrity in real time during high-risk surgery. This role is for someone who wants genuine ownership of a hybrid hardware/software QMS and wants to be close to the regulatory and engineering core of an AI SaMD company.

You'll own and operate our Quality Management System across multiple devices (SaMD + hardware) and be directly responsible for FDA/ISO-aligned documentation, design controls, supplier quality, clinical-quality support, and software validation oversight. You'll work directly with the COO/CPO (me), CTO, and our Director of Clinical Research.

Please email Joan at Email is hidden with a resume & cover letter about why this work matters to you.

Onlook (https://www.onlook.com/) | Founding Engineer (Fullstack / AI) | San Francisco or REMOTE (US) | Full-time

Onlook is an AI-native visual editor that lets designers, PMS, and engineers collaborate directly in the browser. We launched earlier this year, hit #1 on Hacker News, became the #1 trending repo on GitHub (above DeepSeek + Anthropic), and have grown to 22,000+ stars. We’re now hiring our first Founding Engineer.

We’re a design-led, product-obsessed team backed by YC, and we’re building a next-generation visual IDE used by tens of thousands of designers and engineers.

What we’re looking for:

• Full-stack engineer comfortable owning large, ambiguous problems

• Strong bias toward building fast and shipping often

• High craft, strong opinions, and willingness to defend them

• Desire to build an open-source product in public

• Someone who wants to help shape the culture, architecture, and direction from day one

Tech: Next.js, Tailwind, tRPC, Supabase, Drizzle, Bun, Docker, Anthropic, AI SDK.

What you’ll do: You’ll work across the stack, contribute to one of the fastest-growing OSS projects ever backed by YC, design and ship core parts of the visual editor, work with 100+ contributors, and help define the product with real users. If you’re in SF, we have a beautiful office near South Park.

How to stand out: Share something you’ve built. A project, repo, or portfolio tells us more than a resume.

Email me directly Email is hidden or apply at https://www.ycombinator.com/companies/onlook/jobs/e4ghv1n-fo...

Hiring: MouseMux | Remote (EU-friendly) | Part-time (8-16h/week) | Community + Outreach + Content

I’m the solo developer behind MouseMux (mousemux.com) - a Windows tool that enables multiple users / multiple cursors on one desktop (local + remote). It’s used in trading / multi-monitor setups, simulator & control-room (SCADA-ish) environments, classrooms, and other collaborative workflows. MouseMux is at a turning point: a wave of major new functionality is landing, especially around remote multi-user collaboration. The product is becoming significantly more capable, and I need someone who can translate that to the world - clearly and genuinely, in the niches where it shines. You’ll be the “spider in the web”:

* Talk to existing customers, capture use cases, keep relationships warm * Create simple content (short screen-recorded videos, posts, case snippets) * Find look-alike companies/institutions and do human, non-spammy outreach * Coordinate with relevant creators (YouTube/bloggers) for deep-dives * Occasionally post in relevant communities (Reddit/Discord/forums) transparently and helpfully No coding required, but you should be comfortable with technical users and Windows tooling. I’m optimizing for someone autonomous who can run with outreach + content.

Comp: contract, €60–€120/hour depending on fit, 8–16h/week. Start with a small paid test project. Bonus possible for meaningful outcomes (pilots/case studies/revenue growth).

Email: Email is hidden with (1) short intro, (2) 1–2 examples of content/outreach, (3) why MouseMux.

Stargazr | Lead Integration Engineer (Path to Solutions Architect) | Fully remote | https://stargazr.ai

We are a small startup (<10 employees, 3 developers, recently post-revenue) in the analytics and simulation space. We sit on top of ERPs and production systems to provide financial and operational analysis for project-based manufacturing (aircraft, robotics, automotive).

Our stack is Python (Flask and Pandas), Vue 3, PostgreSQL and Clickhouse. Our infra is simple self-contained EC2 machines. We operate with high ownership, letting you impact both technical and strategic decisions.

We are looking for a senior engineer (5-10+ years) to own our integration process. You must have hands-on experience building data ingestion pipelines and ideally a background in technical pre-sales. You will start by shipping these integrations and evolve into a Solutions Architect role as the system and team mature.

To apply, please send your CV and a short background to Email is hidden

StorPool | Senior Software Engineer - Storage Core (C/Linux) | Remote (UTC-1 to UTC+5) | Full-time | Multiple roles

StorPool is building the future of data storage. Our software runs at the heart of modern clouds, delivering <100µs latency, 113M+ IOPS per cluster, and 99.999% availability. We're profitable, self-funded, and our customers love us (NPS off the charts).

We're looking for a Senior Software Engineer to join our Core Storage team. You'll tackle genuinely hard problems: writing custom Linux drivers, optimizing lock-free data structures at nanosecond scale, building fault-tolerant distributed algorithms, and debugging issues that go all the way down to kernel internals. This isn't CRUD work - it's systems programming at its most challenging.

Competitive salary, fully remote, meaningful time off, and a yearly education budget to keep learning.

If you get excited about shaving microseconds off I/O paths and building infrastructure that simply doesn't break, we should talk.

Apply here: https://storpool.com/force/senior-software-engineer-storage-...

Pinetree | Remote (North America, GMT-8–GMT-5) | Full-time | Salary + Equity

We’re hiring our third team member, a full-stack engineer, to work directly with the founders across the Pinetree codebase. If you were here today, you’d be shipping notifications, building out the creator studio with analytics and video management tooling, and improving our Farcaster mini app experience and onchain features like direct payments to creators.

Pinetree is building the best onchain platform for video creators: a crypto-native alternative to ad-driven video platforms that gives creators real ownership over distribution, monetization, and their content. We’re looking for someone highly autonomous who brings solutions to complex problems and wants meaningful product and company ownership.

You should have experience writing and deploying production software in TypeScript, ideally on a small (<50 person) team or other startup environment, and be comfortable working across the stack (React / React Native / Next.js, Node, Postgres). Crypto or social product experience is a plus.

Stack: TypeScript, React, React Native, Next.js, Node, Postgres

Comp: $120–200k base, 1–4% equity, health/dental/vision, unlimited PTO, remote-first, $2,500 home office budget.

Reach out to Email is hidden with a resume or links to work you’re proud of.

FUTO | Austin, TX | On-site / Remote | Full Time

FUTO is an organization dedicated to developing, both through in-house engineering and investment, technologies that frustrate centralization and industry consolidation. Our work consists of a combination of in-house engineering projects, targeted investments, generous grants, and multi-media public education efforts. Our principles are here: https://futo.org/about/what-is-futo/

Machine Learning Engineer - FUTO Keyboard

FUTO Keyboard is a privacy-first software keyboard for Android. Every prediction inference routine runs entirely on-device; no user data can ever leave the device. We support over 150 keyboard layouts and languages, and over 700 layout + language combinations (not all of them include dictionary or predictions)

Swipe typing is an important part of the mobile typing experience for many. Applying machine learning here poses a unique challenge due to the requirement of needing to support so many layouts and languages, as well as user-added personal dictionary words (or even layout customizations!), with limited data. We have previously collected and publicly released a US English QWERTY dataset: https://huggingface.co/datasets/futo-org/swipe.futo.org/

We are looking for a machine-learning researcher or engineer to work through these challenges and help us improve the swipe typing experience in FUTO Keyboard.

More info here: https://futo.org/jobs/machine-learning/

To apply, send your resume and cover letter to jobs at futo dot org with the subject of the position you're interested in.