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: will [at] myndstream.com

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

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 d+hn@krea.ai (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 hello@zetier.com

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 sam@graphite.dev 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.

Andesite AI | Senior Full Stack Software Engineer | Remote (US) | Full-time

Andesite AI is a company founded by industry and govt veterans to build security products that transform how humans and AI collaborate to defend against increasingly sophisticated cyber threats.

We are looking for an experienced software engineer who not only loves the craft of building great software but also building and leading great teams. Since we are navigating the noisy space of AI to deliver a real, valuable tool to cyber analysts, traits like technical expertise, conviction, creativity and leadership go a long way.

Please apply here and reference this post in your application! https://job-boards.greenhouse.io/andesite/jobs/4773650007

There are also a few other roles open on our career page as well (threat hunter, customer support engineer): * https://job-boards.greenhouse.io/andesite

VersaFeed.com | SENIOR SOFTWARE ENGINEER (Python/Django) | REMOTE (USA/EU) | Full-time

About us: Fancy ETL pipeline which processes products from huge ecommerce companies. Data extraction and massage, delivery to destinations like Google/Meta/TikTok/etc. Profitable, 15+ yrs stable, 100% employee-owned. No VC, no pointless meetings, just serious coding.

Stack: Python/Django, JavaScript, VueJS, PostgreSQL, Snowflake, Docker, Git, AWS, AI/LLM integrations (OpenAI & Gemini).

Compensation: $150K–$250K USD/year DOE.

You: Senior dev who's seen (and fixed) enough dumpster-fire code to last a lifetime. Python/Django deeply internalized; ideally strong Vue (or React) skills. Git/Docker/REST are second nature. You’re the coder other devs come to when their stuff breaks: an architect-level thinker who’s rewritten ‘clever’ code into something that actually works. You play well with others and write code that’s easy to live with. Bonus: AI integrations, Py2→Py3 migrations, Snowflake (or Databricks) experience.

Timezones: VersaFeed's "core" time zone is PST and we have M/W/F standups at 9AM PST. Otherwise, we are async-friendly and welcome US and EU applicants.

Benefits: 401K match (USA), healthcare, equity, fully remote. Stable company with no time-wasters.

Apply: email jobs+hn253 [the-at-mark-thing] versafeed [the-period-thing] com

Saildrone | Multiple Roles | Onsite/Hybrid (US Only) | SF Bay Area (Alameda) | Full-Time | https://www.saildrone.com/

Saildrone is the world's leading collector of ocean related in situ data via uncrewed vehicle, above and below the sea surface. We work with governments, civic agencies, foundations, universities, and private companies around the globe to derive better information about our oceans and seas - be it sailing drones into the eye of hurricanes to obtain new scientific storm data, mapping out the ocean floor, collecting new CO2 data in hard-to-reach areas, counting biomass to establish fishing quotas, or detecting and stopping illegal fishing and drug trafficking.

Maybe you saw that we've repeatedly hucked drones into category 4 hurricanes[1]. Or maybe that we recently completed a transoceanic cable survey for Meta[2]. And maybe you saw that we just wrapped up a big demonstration for our partners in NATO[3]. Or maybe you didn't see any of that, but you're still intrigued by the idea of autonomous, long endurance sailboats that help us better understand our planet.

Whatever the case, we're hiring for a breadth of different positions across our organization. In software, we're hiring for folks in our Perception, Platform, Frontend, and Vehicle teams. Stacks vary from team to team, but we're looking primarily for folks with backgrounds in C++, Python, and/or JavaScript (Node, TypeScript, React). All software positions are hybrid roles based out of Alameda, just a quick ferry ride across the Bay from San Francisco.

In addition to software engineers, we're also hiring for a bunch of other positions across the company in production/manufacturing, technical operations, and more.

You can see a list of open positions on our career page: https://www.saildrone.com/careers

Please apply through our career page; be sure to select "Other" and specify this HN post when asked how you heard about us!

[1]: https://news.ycombinator.com/item?id=28715110

[2]: https://www.saildrone.com/news/revolutionizing-deep-water-ca...

[3]: https://www.saildrone.com/news/unmanned-unmatched-saildrone-...

Breezy | Product Engineer (Fullstack) | Remote (US) | Full-time | $175k–200k + Equity | https://www.getbreezyapp.com

Breezy is modern field service software purpose-built for residential HVAC companies. We combine thoughtful product design, tight customer feedback loops, and best-in-class technology, including LLMs when they’re the right tool for the job, to help contractors grow, streamline operations, and run world-class businesses. We’re already replacing legacy systems like ServiceTitan and Housecall Pro.

We’re a small, senior team with experience scaling successful startups. We ship quickly, stay close to our customers, and take pride in building products that actually move the needle for our customers.

We’re hiring a senior Product Engineer to help define and build the product. This role goes beyond writing code. You’ll weigh in on product strategy, shape user experience, and explore how emerging tools like LLMs can create real customer value. You’ll work across the stack (TypeScript, React, Node.js, PostgreSQL) and own features from idea to production in a high-velocity environment.

We’re looking for someone T-shaped: broad technical range, depth in a few areas, strong product instincts, and a sharp eye for delivering customer value. You should be genuinely excited about AI engineering and not just comfortable with LLMs and modern dev tooling, but actively raising the bar for how your team uses them.

Tech Stack: TypeScript, React, Node.js, PostgreSQL, AWS Comp: $175–200k + equity, full health benefits, 401(k), remote-first with periodic team offsites To apply: Email jobs+august25@getbreezyapp.com with your resume, links to your work (GitHub, LinkedIn, personal site, etc.), and a short note on why this role and Breezy are a fit for you

Read the Job Description here (https://drive.google.com/file/d/1sD0tlF1f9RG0hF2bjCGMW0LFCR6...)

Relativity Space | Long Beach, CA / Stennis, MS | Full-time

Multiple software teams hiring to help build the next great orbital launch company. Our Terran-R vehicle will be a strong competitor to Falcon (and bigger) and will launch late next year.

Software roles include full-stack web devs, embedded, low level performance, data pipeline engineering, and more. Teams work on projects like our in-house systems powering the factory, our ground control system, telemetry ingestion, data analysis tools and flight software.

If you're interested in learning about hardware manufacturing, excited about space, and want to build high quality software for engineers across all disciplines... come work with us! No prior aerospace experience required at all.

Search for "Terrestrial Software" and "Vehicle Software" on our careers page for roles including more details and our pay ranges: https://www.relativityspace.com/jobs

Earlier this year Eric Schmidt joined as CEO and invested in a big way -- his involvement is doubling down on our commitment to building high quality software teams in-house, and we're hiring across the board.

CoVar | Durham, NC | https://covar.com/ | Full-time | ONSITE/HYBRID

CoVar is a small R&D company specializing in machine learning and software development for defense, healthcare, and manufacturing applications.

We're looking for a jack-of-all-trades who can: prototype computer vision algorithms, build Python web services, develop Javascript visualization tools for time-series data, ... any or all, with the only hard requirement being eagerness to learn.

Contact careers@covar.com for more information!

everybody but nobody somehow

Reckon Digital | Full-Stack Software Dev | London, UK or remote (UTC) | Full-time | https://reckondigital.com/careers/ We are looking for an experienced Senior Full-Stack Software Engineer to work with us on a full-time basis. Required: Python, React. The place of work is London or remote. Reckon Digital is a London-based software company creating state-of-the-art business software solutions and providing consultancy in the areas of Artificial Intelligence, Optimisation, and Cyber Security. A large part of our work is for international non-profit organisations and NGOs. - More info on Reckon Digital: https://reckondigital.com/ - Full job description, including requirements, our technology stack, etc: https://reckondigital.com/careers/ Interested? Email us at jobs@reckondigital.com! Make sure you include an updated copy of your CV.

yeet | Chicago, IL / Remote | Full-Time

Building a dynamic runtime on top of the Linux BPF sub-system. Looking for extremely talented / passionate Rust developers / Product Managers with a deep interest in Linux internals, Dev Tools, Great Developer Experiences and Systems programming. Experience writing highly-concurrent, performant multi-threaded Rust is a must. Feel free to tell us all about your favorite GNU core utilities / Linux system calls / kernel sub-systems at:

work [at] yeet.cx

You can visit us at https://yeet.cx/

Or try our interactive sandbox at https://yeet.cx/play

foam | Fullstack Engineer & Backend Engineer | Onsite (SF) | Full-time | $140k-$190k + Equity (0.25%-2%)

About us: foam is an AI tool that identifies production code errors, explains them, and notifies engineers via Slack.

What we're looking for: Strong product focused senior engineers with experience (or deep interest) in AI.

Please find full details here at foam.ai/careers and email careers@foam.ai with interest and resume or LinkedIn profile.

Brilliant.org | Software Engineers & Designers | Remote (North America), SF, NYC | Full-time | $170k — $235k | https://brilliant.org

Brilliant is building world-class interactive learning experiences that combine challenging problems, compelling narratives, and delightful visual storytelling.

We're hiring engineers and designers to help craft the next generation of interactive learning and change how the world learns.

Engineers at Brilliant think about both "building the right thing" AND "building the thing right" while pursuing high standards of excellence for ourselves, our product, and our codebase.

Our designers craft interaction patterns that make hard math, science, and computer science concepts feel approachable, delightful, and addictively learnable.

If you're energized by the prospect of doing the best work of your career and changing how the world learns alongside the most talented peers you've ever worked with, you can learn more and apply here: https://brilliant.org/careers.

Radar Labs | Software Engineers (ML, AI, SRE, data platform, full-stack, mobile, security) | ONSITE in New York City | Full Time | https://radar.com - Radar Labs is the geo-location dev tool. - Doing 1B+ API calls per day

- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).

- We're based in NYC with our HQ in Union Square and remote friendly.

Interesting things we're working on:

- HorizonDB, our Geospatial database written in Rust

- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband and other sensors and ML.

- Extracting raw map data from satellite maps and the web leveraging ML and AI

- Anomaly detection to identify spoofed locations

- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time

- Multi-Region AWS K8s deployment, 99.99%+ availability

- Frontend tools to visualize and debug location data at scale

Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com

Gentrace | TypeScript + React | Hybrid (Williamsburg, Brooklyn & San Francisco)

Gentrace helps the most impactful companies in the world like Quizlet systematically test and evaluate their AI applications. We recently raised an $8M Series A from Matrix Partners.

Ideal candidate profile: - We use TypeScript and React heavily. We prefer candidates with strong experience with modern web technologies. - 4+ years experience working in a full stack capacity.

Role info: https://gentrace.ai/eng Email: jobs@gentrace.ai