EnsoData | Sales | Remote US | Full-Time | $83k-$220k + equity

Sleep is vital to recharging mentally, restoring our bodies physically, and fighting off disease. Sleep is so core to our health that it's the activity we all spend most of our life doing.

* Yet sleep disorders are some of the most underdiagnosed health conditions on the planet, with an estimated 80% of obstructive sleep apnea patients undiagnosed and untreated

* EnsoData uses pulse oximeters paired with machine learning and mobile apps with a clinician portal to automate sleep study scoring and give sleep clinicians tools to find and help patients with sleep disorders.

* We're hiring 12 regional sales executives around the USA to build relationships with sleep clinicians and figure out which of our product can help solve their problems. Base comp is $83-90k based on experience, plus commission with TC of $220k

https://apply.workable.com/ensodata/j/f1ff1aab27/

HomeVision | Engineering | Hybrid SF | Full-Time | $10k-$220k + equity

I'm looking for an junior-to-senior software engineer to work with me (CTO) directly. Our systems process millions of pages of documents a month for the mortgage industry. We work with some of the largest lenders in the country and are at the forefront of applying LLMs and other multi-modal models in this industry.

New-grad and junior engineers particularly encouraged to apply. Looking for people who are motivated to write good code with a good mix of practicality and aesthetics.

Please apply here:

https://jobs.ashbyhq.com/homevision/a3f79d43-5d9e-46bf-a43f-...

Connie Health | https://www.conniehealth.com/ | Multiple engineering roles | Hybrid (Boston, MA) | Full-time

Connie Health is a fast-growing healthtech startup on a mission to empower older Americans to make confident, worry-free Medicare plan decisions. We offer a tech-enabled Medicare navigation platform that combines an AI-driven technology with local Medicare experts to help people select optimal healthcare plans and navigate their benefits. Our culture is mission-driven, collaborative, and innovative, as we strive to transform healthcare through data-driven insights and personalized guidance.

We are building a two-sided marketplace, connecting older Americans looking for health insurance with local Medicare agents.

We are looking to fill multiple positions on our rapidly growing engineering team, based out of Boston, MA:

Senior Backend Engineer (Call Infrastructure) | $130,000 - $156,000 + Equity

Responsibilities: Lead the development of our Twilio-based calling + messaging infrastructure, enabling seamless communications between Medicare agents and customers. You must have significant experience with Twilio. Tech Stack: TypeScript + NestJS, Twilio / Five9 / Zoom, Postgres, AWS, Docker + Kubernetes

Lead AI/ML Engineer | $152,000 - $182,000 + equity

Responsibilities: Player-coach role, leading a small team of AI/ML and software engineers to build our top-of-funnel systems. Tech Stack: Python, "traditional" AI/ML model building tools (scikit-learn, PyTorch, XGBoost), open source LLMs, AWS, Aurora/Postgres, Redshift

Senior Backend Engineer | $130,000 - $156,000 + equity

Responsibilities: Build the core backend systems that power our top-of-funnel, such as tracking leads through various channels, integrating with affiliate partner marketplaces, working with AI/ML engineers to build our lead bidding models, dynamically mapping leads to agents, and AI-based lead pre-qualification. Tech Stack: TypeScript + NestJS, Postgres, AWS, Docker + Kubernetes

I am Huan, CTO at Connie Health. If you are interested, please feel free reach out to me directly at with your resume: Email is hidden !

Notable Health | Staff Fullstack Engineer/Engineering Manager | San Mateo, CA | Hybrid

Join us at Notable Health! We're building intelligent automation to transform how healthcare works—freeing up clinicians and staff to focus on what matters most: patient care. Our platform uses AI to eliminate manual workflows, streamline operations, and improve outcomes across leading health systems. If you're passionate about meaningful impact and cutting-edge technology, we’d love to hear from you.

Apply here: https://jobs.ashbyhq.com/notable More at: https://www.notablehealth.com

Deepline (fmr. Aero) | NYC (ONSITE) | Founding Full-stack Engineers | $160k-$220k + meaningful equity

SaaS is dead. We're building the generative platform that enables enterprises create perfectly personalized software on-demand instead of struggling with expensive tools and months of failed onboardings. Imagine Lovable for Operators -with perfect internal context - every datapoint, every system, every process.

Just raised $3.3M from Lerer Hippeau + Looker founding team. Technical founding team from Uber, Lyft, Capchase, MIT Lincoln Lab.

https://www.getaero.io/careers#open-roles

Swayable | https://www.swayable.com/ | SF, NY, Remote | Full-Time

Swayable measures how content changes people's opinions. We apply a variety of sophisticated machine learning classification, regression, causal AI, and GenAI-based analyses to survey-based data we collect. Customers receive high-level, actionable data about different group's responses through an ever-expanding portfolio of web-based visualizations, reports, and natural language interfaces.

All positions support remote US work or SF/NY office.

- Senior Engineer: AI Applications. AI Applications Engineer that blends full stack software development expertise with agentic/multi-node workflow architectures. You will be responsible for creating and building our portfolio of LLM-based classification, reporting, and analysis applications. Stack: Python (langgraph, pandas, celery, flask, MCP), JavaScript (Vue.js, Node.js), MongoDB, GraphQL, and a variety of LLM providers.

- Senior Engineer: Full-stack Web. Full-stack web to build and enhance our core browser-based applications for building surveys, collecting responses, and visualizing results generated by our suite of sophisticated numerical and qualitative analyses. Stack: Vue 3 (Nuxt), Tailwind CSS, Node (Express), GraphQL, Mongoose, MongoDB, Cypress.

- Senior AI/ML Engineer: Scientific Computing. Blending Python software development expertise with scientific computing, machine learning, and AI experience to advance the state of the art analytics engine that powers our core product. Stack: Python (Numpy, Pandas, scikit-learn, Celery, Flask), machine learning (linear regression, casual AI, text classification), MongoDB, and GraphQL.

Postings are available at https://www.swayable.com/careers/ or free free to contact me (the hiring manager) at Email is hidden

Coop (https://smart.coop.farm)| 2nd Founding Engineer | Remote or Onsite | Austin, TX | Full-time, Part-time, Internship if you’re scrappy

My name is AJ Forsythe and I'm the Founder / Chief Chicken Tender at Coop! We're an Austin TX based company on a mission to build the world’s largest decentralized food production network, starting with AI powered chicken Coops. We’ve been in the market for about 18 months and our customers are in 48 states and will generate about >5M eggs this year. It's insanely fun to work on and we have a shot at building a huge business in the connected urban farming space. If you’re big into computer vision, consumer products that are fun, and an awesome team we would love to chat. The Coop has an automatic door + cameras doing computer vision work (predator detection, egg alerts, remote health monitoring, etc). It's a super exciting time and are seeing directional product market fit which I'm thrilled about. Seriously go check out our website, it's a super fun + amazing product.

We’re a tight-knit team of 6 people with 15+ years of experience working together. We’ve been through YC, started and scaled multinational million-dollar businesses together, taking them from idea to acquisition by a Fortune 50 company. We’re gritty and passionate without taking ourselves too seriously - and we’re here to build something really exciting that helps people reconnect with their food and the planet. We're VC backed (call it $5M) by some of the world's best investors but we are a scrappy small team that moves fast.

We have an absolutely fantastic CTO Ryan that I'm looking for his / our right hand person to work alongside with. I think the term full stack is overused but that's closest to what we're looking for. Also this really isn’t a traditional Eng role, I look at it as we’re a small growing team and you would be one of us working on a ton a cool projects on day 1. Also, we LOVE working with founders so if you've started a company before that's epic.

You can also reach out to me directly at: Email is hidden - Just email me your LinkedIn / GitHub / portfolio + why you think you'll be an awesome fit and I'll respond. This is my 3rd company (2 have exited) and I want to build the super solid core team and you might be the perfect fit for us and vice versa.

Bwok Bwok!

AJ

Promptfoo | Senior/Staff Engineers, Security Researchers, GTM & Founding Operators | REMOTE (North America) / Hybrid San Mateo CA | Full-time | https://promptfoo.dev

Promptfoo is the MIT-licensed open-source toolkit 125 000+ developers use to evaluate and secure LLM apps. We just closed an $18.4 M Series A led by Insight Partners with participation from a16z and are scaling a small, senior team of high-agency builders.

Open roles

- Senior / Staff Full-stack Product Engineer (TypeScript + Python)

- Senior / Staff AI Security & Red-Team Engineer

- Solutions Architect / SE (multiple)

- Product Marketing Manager (cyber focus)

- Enterprise Account Executive (Bay Area, multiple)

- Technical Writer

- Developer Advocate

Why join

- Build the definitive AI security stack already used at 30+ Fortune 500s.

- Work in open source.

- Competitive salary, meaningful equity, async-friendly culture of ownership.

How to apply

1. Skim https://github.com/promptfoo/promptfoo then run:

npx promptfoo@latest init --example getting-started 2. Email Email is hidden with subject “HN – July 2025”, a short intro, and a GitHub / LinkedIn link.

3. I reply to every thoughtful application and send swag to anyone who tries or contributes to Promptfoo.

Careers page: https://www.promptfoo.dev/careers/

Stellar Science | Hybrid (USA) Albuquerque NM, Washington DC (Tysons VA), Dayton OH | Full time, interns/co-ops | U.S. citizenship required | https://www.stellarscience.com

Company: We're a small scientific software development company that develops custom scientific and engineering analysis applications in domains including: space situational awareness (monitoring the locations, health and status of on-orbit satellites), image simulation, high power microwave systems, modeling and simulation, laser systems modeling, AI/ML including physics-informed neural networks (PINN), human body thermoregulation, computer vision and image processing, high performance computing (HPC), computer aided design (CAD), and more. All exciting applications and no CRUD. We emphasize high quality code and lightweight processes that free software engineers to be productive.

Experience: Other than interns, we currently require a Bachelors degree in physics, engineering, math, computer science, or a related field, plus preferably 3+ years of work experience or a Masters or PhD in lieu of work experience. (Roughly 30% of our staff have PhDs.)

Technologies: Mostly C++23, Qt 6.9, CMake, git, OpenGL, CUDA, Boost, Jenkins. Windows and Linux, msvc/gcc/clang/clangcl. AI/ML and other projects use Python, some use Java or Javascript/Typescript/React.

Apply online at https://www.stellarscience.com/careers/.

Column (https://column.com/) | San Francisco, CA (ONSITE) | Full Time | Software Eng (Infrastructure), Software Eng (Backend), Software Eng (Product)

Column is building the infrastructure that powers the US dollar globally. We own a nationally chartered bank that we've built from the ground up. We're currently processing trillions of dollars annually, supporting some of the largest and most sophisticated companies out there like Wise, Bilt, Brex, Ramp, Mercury and dozens of others.

Previous to this I started Plaid (plaid.com), and at Column I'm focused on keeping an extremely lean and experienced team. We're currently 10 experienced engineers that all report to me. We are looking for an ambitious infrastructure, product, and backend engineer (one of each) that wants to build incredible software from first principles.

Apply here: https://column.com/careers

Feel free to email me with any questions: william@