Chroma | ONSITE - San Francisco | Full-time | https://trychroma.com

Chroma is the open-source search and retrieval database for AI applications. It's an open-source database with vector, regex, and full-text search. We support local, single-node, and cloud hosting. Help build the future of context engineering!

We're a team of 17, all engineers today. We work in Rust, Python, Typescript, and Go.

We're hiring for these areas:

- Head of operations

- Product design

- Production engineering

- Platform engineer (Rust)

Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...

More details at: https://careers.trychroma.com

Checkly | Multiple Roles | REMOTE (UTC +3 to UTC -3) | Full time | https://www.checklyhq.com/

Checkly helps engineers build reliable products by unifying testing, monitoring and observability. OpenTelemetry, Playwright, and Monitoring as Code are our foundation for unifying performance and reliability. In 2024, we raised $20M in Series B funding from Balderton, CRV, and Accel to take things to the next level.

-Senior/Staff UX Designer -Senior Backend Engineer -Staff Product Manager

See the full descriptions and apply here (and mention HN): https://jobs.ashbyhq.com/checkly?utm_source=hn

i’ve seen this role come up a few times over the past couple months, i applied a while back but didn’t hear back. Just curious, are you still reviewing applications, building a database for later, or do you usually just dismiss candidates without replying?

Harmony Intelligence | Mid-Senior Full-Stack Software Engineer | Remote (UTC 10pm-3am crossover) | $150k-250k + benefits + equity

I'm Alex, CTO & Co-Founder. We've just raised $3M to build a defensive AI AppSec agent to protect mission-critical software from AI cyberattacks.

You'll enjoy this role if you thrive on:

- Variety: building across the stack (mainly with Python), shaping product direction, prototyping new ideas

- Moving fast: we focus on impact, no micromanagement or politics

- Meaningful impact: on AI safety x cybersecurity

- Remote working: collab hours are best suited to APAC and North America + 2 destination offsites a year to connect

Compensation is quoted for US and AU respectively; local adjustments for other countries USA: $150k USD to $250k USD + comprehensive benefits package including health, dental, and vision insurance + equity Australia: $150k AUD to $250k AUD + superannuation + equity

Apply here https://www.harmonyintelligence.com/careers Read more here https://www.harmonyintelligence.com/harmony-raises-usd-3m-to...

Chestnut | Hiring multiple roles (across engineering) | San Francisco + Seattle hubs (hybrid) | https://jobs.ashbyhq.com/chestnut

Massive opp. Chestnut is the first AI-native operating system for insurance distribution management, tackling a $100B+ spend pool in the largest industry in the U.S. Legacy software and manual processes dominate this space; Chestnut is the only modern platform enabling real-time data, automation, and agentic AI workflows that directly grow carrier revenue.

Our stack: Go, TypeScript/React, Postgres, Temporal, K8s, Dagster, LLMs.

******

We’re hiring:

** Forward Deployed Engineer – Work directly with customers to ship AI-powered workflows and integrations. https://jobs.ashbyhq.com/chestnut/5d4fd1ec-60f3-4669-a2d2-31...

** Senior Software Engineer – Build core services, event-driven systems, and automation layers that scale. https://jobs.ashbyhq.com/chestnut/fbbb7601-3d31-48b4-8639-75...

** Staff Software Engineer – Lead architecture and technical direction as we scale past enterprise workloads. https://jobs.ashbyhq.com/chestnut/f28c5ee5-12aa-4e7b-b0ea-f5...

** Engineer [Agent Orchestration] – Focus on applied systems: multi-agent coordination, workflow automation, retrieval, and tool use. Bridge research to production and design orchestration layers for enterprise reliability. https://jobs.ashbyhq.com/chestnut/075a0010-bfa5-489e-8808-e9...

** Engineer [ML + Agent Design] – Experiment with prompting, fine-tuning, and novel LLM techniques. Prototype new agent behaviors and push the boundaries of how models reason, interact, and automate in data-heavy domains. https://jobs.ashbyhq.com/chestnut/0b6e2b45-fab9-47f2-8f10-30...

We’re also hiring for Product & Commercial Lead and Data + Infra roles (details on the site).

******

You'll work on the bleeding edge - embedding enterprise-grade agentic AI at scale. We're looking for engineers who thrive in fast-paced environments and want to make a meaningful impact.

More info + apply: https://jobs.ashbyhq.com/chestnut

Myndstream | Hybrid London, UK | Full time | https://myndstream.com

Music for health and wellbeing - we're working with leading scientists at MIT, NYU and UPenn alongside a roster of composers to create validated music to improve health and wellbeing.

We are on course to enhance the effectiveness & efficacy of our music through the use of ML.

We've started with hospitality as a launchpad and are now moving into healthcare markets.

Core Stack: TypeScript, Rust (for low-level audio work), React, PostgreSQL, WebSockets, GCP

If you are enjoy ownership, autonomy, design patterns and are a pragmatic generalist then you will enjoy it here.

Hiring Founding Software Engineers in London, UK, - contact me via email: Email is hidden

krea.ai | Distributed Systems Eng. & Data Engineers | San Francisco (on-site), CA | $200K-$400K

I'm the cofounder of Krea (https://www.krea.ai), a startup in San Francisco building browser-based AI creative tools to improve the workflows of artists, designers, and creatives. Small team (~15); millions of active users; and we've raised over $83M from top silicon valley firms.

We're looking for talented engineers who want to tackle hard technical challenges with smart people while building a creative platform that big companies and startups will rely on.

The job:

- Build distributed systems to process massive (billions of files, petabytes), amounts of image, video, and 3D data, solving scaling bottlenecks as you go.

- Work with our research team to build ML pipelines and deploy models to make sense of raw data (example - find clean scenes within videos).

- Learn ML engineering from world-class researchers on a small tight-knit team. As you’re building data pipelines, you’ll contribute to foundation image, video, and world models from 0 → production, and see them used by millions of Krea users.

- Play with massive amounts of compute on huge Kubernetes GPU clusters; our main GPU cluster takes up an entire datacenter from our provider.

Our tech stack: python, pytorch, k8s, a rotating cast of data tools (e.g. DuckDB, massive relational dbs, PyArrow, etc.)

You should apply if you are an excellent generalist engineer with strong backend experience and an intuition for systems design. Bonus points for deep experience with distributed systems, kubernetes, and existing ML or data experience (though not required!). Cool side projects are a green flag.

A few links about us:

- Technical report for FLUX.1 Krea, our latest text-to-image model → https://krea.ai/blog/flux-krea-open-source-release

- HN discussion around FLUX.1 Krea → https://news.ycombinator.com/item?id=44745555

- A cool demo by one of our users → https://x.com/syntonikka/status/1941198480820797921

You can contact me at Email is hidden (the +hn will bump your email in my inbox).

GoodParty.org | Multiple Roles | REMOTE (US) | Full-time & Contract | https://goodparty.org

We're on a mission to disrupt the corrupt two-party system by building tools that change the rules—and we need your help. GoodParty.org is not a political party; we're a fully remote, US-based team united around making democracy more accessible, transparent, and fair. If creatively disrupting politics for good sounds like a challenge you're up for, check out the roles we're looking to fill right now:

- Chief Technical Officer • Engineering • Full-time

- Content and Communications Director • Growth • Full-time

- Data Engineer • Engineering • Full-time

- Director of Engineering • Engineering • Full-time

- Growth Marketer • Growth • Full-time

- Political Associate • Politics • Contract

- Product Design Manager • Design • Full-time

- Product Marketing Manager • Growth • Full-time

- Senior Full Stack Engineer • Engineering • Full-time

- Senior Product Manager • Product • Full-time

- Social Media Content Manager • Growth • Full-time

- Staff Full Stack Engineer • Engineering • Full-time

- User Success Manager • Operations • Full-time

Work with us: https://goodparty.org/work-with-us/

Zetier | Multiple US locations (VA, PA, FL, TX, CA, NY) | ONSITE | Full-Time

Zetier develops real-world tools and capabilities to secure our nation in the short- and long-term. If you’re excited to delve deep into low-level systems, exploit dev, and more alongside a group of passionate hackers, then we’d love to hear from you.

Open-sourcing our work as much as possible is integral to Zetier and what we stand for. As folks who learned to hack on platforms like Linux, we aim to give back to the OSS community. Not only do we encourage our engineers to contribute, but we go a step further, adding monetary incentives to do so.

We’re looking to find the right people for a range of roles, including:

+ Vulnerability Researcher

+ Android Security Engineer

+ CNO Embedded Engineer

+ CNO Software Engineer

+ IT Security Engineer

+ Senior Technical Lead

+ Business Developer

All open positions: https://zetier.breezy.hr/

Our approach and benefits: https://zetier.com/careers/

Different skill set? Drop us a line at Email is hidden

Graphite | Mid-level & Senior Software Engineers| New York, NY in our Soho Headquarters | https://graphite.dev

We’re building Graphite to help high-performing engineering teams run faster, cleaner code reviews. Our product is already used by some of the world’s best developers, and we’re just getting started! We're hiring experienced engineers across the stack, are are looking for people who:

-Care deeply about code quality, system design, and scaling software responsibly

-Have a strong product sense and enjoy collaborating closely with design & product teams

-Have experience with AI-driven workflows, prompt engineering, or interest in developer tooling is a plus

-Are product-driven and quality-obsessed; we ship thoughtfully and often

We've recently raised a $52m Series B by Accel, A16z, & others, and have big goals this year.

The hiring process: quick intro call, 2 technical interviews, & an onsite interview, followed by offer!

If you are someone who wants to work on meaningful problems, values clean code and thoughtful systems, & loves building tools for other engineers, we'd love to chat with you!

You can apply directly on our careers page(https://graphite.dev/careers#positions) or email Email is hidden with the subject title: "Thank you for stacking with us) with a copy of your CV.

Recruiters: appreciate your hustle, but we’re only hiring through direct applications.