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

+ Program Manager

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

Pepr AI | pepr.ai | Onsite in San Francisco | Full-time | Multiple roles

Pepr is building the AI Operator for growth to replace the traditional ad agency with autonomous code. We apply the quant rigor of high-frequency trading to optimize ad spend, delivering a massive 20-50% upside in efficiency for our partners. We manage ad spend for category leaders like Cider and Cupshe with a clear path to managing billions of dollars. We are backed by Quiet Capital and are hiring for multiple engineering roles:

* Member of Technical Staff, Context - https://pepr.ai/careers?ashby_jid=593ab56b-185c-482d-b7bb-61...

* Member of Technical Staff, Full Stack - https://pepr.ai/careers?ashby_jid=6025c6f4-3b72-4dc6-8a2c-fa...

* Member of Technical Staff, Infra - https://pepr.ai/careers?ashby_jid=c4d307a4-321e-4e31-8b29-b7...

* Member of Technical Staff, ML & Optimization - https://pepr.ai/careers?ashby_jid=baf0e7ac-164f-4f1d-9938-de...

More at https://pepr.ai/careers

If you apply, please send a note to founders@pepr.ai. We will respond to each one

SportsRecruits | Senior and Midlevel Software Engineers working with PHP, Laravel, Vue and React Native | Remote (US) | sportsrecruits.com

SportsRecruits is the leading sports recruiting network, connecting athletes, clubs, events, and college coaches in the recruiting process. The company’s network and tools are trusted by sports organizations such as the IWLCA, IMLCA, NFHCA, and Junior Volleyball Association. Every year, millions of connections are made on the network, resulting in commitments to the best academic and athletic institutions.

SportsRecruits is part of IMG Academy, the world's leading sports education brand.

Looking for:

1. a senior engineer with strong OOP and DDD skills. https://sportsrecruitsllc.applytojob.com/apply/m7xDEkcmrX/Se...

2. a mid-level engineer with a background in PHP, laravel and Vue and a strong desire to learn and work on a great team https://sportsrecruitsllc.applytojob.com/apply/yEdtjhFkby/Fu...

Kato | Founding GTM Strategy & Operations | Onsite in San Francisco | katohq.com

Apply here: https://jobs.ashbyhq.com/pear/7ecc09db-8a34-43ec-8a18-f48eb4...

Kato is building an AI-powered servicing platform that automates critical workflows across every channel with full compliance and best-in-class recoveries. Human teams are then free to focus only on the judgment-driven work that truly needs them.

We are starting today with a compliance first Voice AI agent that handles outbound and inbound loan servicing calls, and are already in production with major names in the fintech lending space like Bilt Rewards and Parafin.

We’re looking for a Founding GTM Strategy & Operations hire to help build the operational machinery that turns our early traction into a repeatable, scalable revenue engine. This is one of the most critical hires at Kato - someone who will work directly with the CEO to build out our sales motion, strengthen our brand, and create leverage across the go-to-market function.

Looking for someone with

- 1–2 years of experience in consulting or startups

- Prior outbound sales (BDR/SDR) or sales operations experience strongly preferred

- Bachelor’s degree in Business or related field

Location: Nigeria (Remote)

Remote: Yes (preferred)

Willing to relocate: No

Technologies: Frontend: React, Next.js, TypeScript, JavaScript (ES6+), Tailwind CSS, Zustand, Redux Toolkit, React Query, HTML/CSS E-commerce & Platforms: Checkout flows, API-driven dashboards, auth systems, real-time updates Backend: Node.js (Basics), REST APIs Tooling: Git, Jira, Vite, Webpack, CI/CD basics

Portfolio: https://toyocodes.vercel.app

Email: toyjad@gmail.com

About me: Frontend engineer with 3 years of experience building production-grade web applications across EdTech, e-commerce, real estate, and social-impact platforms. I specialize in React + TypeScript + Next.js, creating fast, accessible, and scalable interfaces with clean architecture and API-driven workflows.

I think like both a developer and a product owner, I take full ownership, care deeply about user experience, and move products from Figma to production with clarity and speed. Looking for roles where I can ship meaningful features, collaborate closely with product/design, and help improve performance, maintainability, and overall UX.

Rockbot | Senior Engineers (Fullstack & Ads) | Remote (US) | rockbot.com

Media platform for businesses. Music, TV, digital signage, ads. Runs in restaurants, bars, retail chains across the country. ~20 engineers, real ownership, backed by Google and UMG.

Stack: Go, Vue, GCP, Kubernetes, NATS (future) for device comms.

Fullstack: Own features end to end. 5+ yrs backend, 2+ yrs frontend, cloud infra. https://grnh.se/kf32f5fk4us

Ads: Ad serving, targeting, measurement, data pipelines. Ad tech background helpful (VAST, IMA SDK, SSAI). Distributed systems, SQL. https://grnh.se/f8msf4aw4us

$150K-$210K + equity + benefits.

Questions welcome, or email ryan dot sheppard at rockbot dot com

Lore helps individuals improve their health through conversations and rewards powered by our app. In addition to improving their health, we help people become more engaged in their work, life, and family.

Series A start up that has raised $100M. Fully remote.

Full descriptions and apply here: https://careers.lore.co

- Staff Software Engineer

- Staff Data Engineer

- Staff DataOps Engineer

- Staff Machine Learning Ops Engineer

- Staff Machine Learning Engineer

Checkly | Multiple Roles | REMOTE | 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 Backend Engineer (Remote, UTC-3 to UTC+3)

-Enterprise Account Executive (Remote, USA - ET, CT, MT)

-Senior Product Marketing Manager (Remote, UTC-4 to UTC+2)

-Senior Customer Solutions Engineer (Remote, USA - ET, CT, MT)

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

Senior Python Engineer — Rebuild AI LLM Reasoning/Governance Layer (Contract, Remote) We built a working pipeline: • metadata extraction • structured AI reasoning • governance logic • multi-parameter hardware output (BLE) It works now, but it needs to be rebuilt cleanly and professionally. Your workflow: • You generate logic • We test internally • You get structured “better/worse/why” feedback • You refine • Repeat until convergence ________________________________________ You’ll Work On • multi-step reasoning → deterministic guardrails → parameter mapping • async/latency optimization • preference/override capture logic • stable FastAPI backend ________________________________________ You Should Have • Deep Python • FastAPI • LLM structured-output experience • A systems/recursive logic mindset

Send portfolio + availability.

Candid | Founding Engineer | Cambridge/Boston | Onsite/Hybrid

We're building a photo-sharing app that uses CV to automate the annoying parts of sharing photos with friends.

Stack: FastAPI, Postgres, Supabase, AWS. We have a mobile app in progress and an ML pipeline—need someone to own the backend, wire it all together, and ship.

Looking for someone who's: - Done real backend work (Python, FastAPI, whatever) - Deployed ML/CV to prod, not just notebooks - Knows their way around embeddings and similarity search - Cares about privacy/security (we're handling sensitive data) - Has shipped something real, ideally end-to-end

This is a founding engineer role. You'd work directly with me (CEO) and our mobile engineer. High ownership, fast pace, significant equity.

Bonus if you've done mobile integrations or been an early engineer before.

Cambridge/Boston based. Prefer onsite but hybrid works if you can hit the ground running.

nlm280@gmail.com | Subject: "Founding Engineer – Candid"

Drop your GitHub and a quick note about something you've built from scratch.

Redpanda Data | REMOTE | Full-time | https://www.redpanda.com/careers

Redpanda is pioneering the Agentic Data Plane (ADP) - a new category in AI infrastructure that makes it simple and secure to connect AI agents with enterprise data and systems. Built on a multi-modal data streaming engine, Redpanda empowers agentic applications that reason and act in real-time with speed, autonomy, and precision. Global leaders including Activision Blizzard, Cisco, Moody's, Texas Instruments, Vodafone and 2 of the top 5 banks in the U.S. rely on Redpanda to process hundreds of terabytes of data a day. Backed by premier venture investors Lightspeed, GV and Haystack VC, Redpanda is a diverse, people-first organization with teams distributed around the globe.

* Software Engineer, Core Replication - https://job-boards.greenhouse.io/redpandadata/jobs/457731100...

* Software Engineer, Connect - https://job-boards.greenhouse.io/redpandadata/jobs/457974900...

* Software Engineer, Kubernetes - https://job-boards.greenhouse.io/redpandadata/jobs/462890600...

* Senior Design Engineer - https://job-boards.greenhouse.io/redpandadata/jobs/454906500...

Proven Software | Senior Fullstack SWE | REMOTE (US) Full-Time | $140k-$170k

Proven is a start-up software company delivering a modern electronic medical record (EMR) to Behavioral Health & Physical Therapy. Proven’s Founders and Executive team have decades of experience successfully growing and scaling companies in healthcare.

Stack: .NET/C#, SQL Server, Blazor with Telerik controls.

We're looking for a senior full-stack engineer with .NET experience. Experience working in Azure and/or with Blazor is a major plus but not required.

We primarily work ET hours but are flexible Excellent PTO and employer-sponsored healthcare benefits

Email us at: hiring AT provensoftware DOT com

GrayMatter Robotics | Robotics Engineers, Architecture, IT/Automation | LA, USA ONSITE | https://graymatter-robotics.com/ –

GrayMatter Robotics deploys robotic systems for tackling tough jobs in surface finishing. We're a fast-growing company that solves some of the most challenging and rewarding tasks in manufacturing. We're deployed in production all over the US.

–

Robotics Engineer (all types) | $100K - $200K + Equity

We're looking for a few types:

  - product engineers and generalists who can design and build features from concept to production
  - experienced ML for robotics specialists
  - perception robotics engineers, motion planning engineers

Lead Robotics Architect | $200k - $240k + Equity

If you're passionate and super skilled at architecture and c++ for large robotic systems, this is for you! We're building a software stack that is flexible and needs to handle a large variety of surface finishing applications (sanding, polishing, spray painting, sand blasting, grinding, ...).

-

two dozen more roles on our jobs page - not all roles are mentioned are on here: https://jobs.ashbyhq.com/graymatter-robotics

I'm the hiring manager - mentioned HN in your email: achille.verheye@graymatter-robotics.com

Magnetic | https://magnetictax.com | Multiple roles | San Francisco (ONSITE) | Full-time

Magnetic (YC S25) is building the AI tax preparer for accounting firms. We use vision models to extract and structure data from tax documents and automatically populate legacy tax software, saving CPA firms hours of tedious data entry per tax return. Firms are coming to us faster than we can build - our next tax season is already 10x the size of October's, and we have a waitlist for several X more.

We just raised a $5.1M seed round and are building a small, senior, in-person team. We believe in everyone talking directly to customers, and getting into the workflow themselves (i.e. learning how to do tax returns). We like to work together all day, whiteboard new ideas, get lunch together in person, and get drinks after work.

Open roles: [1] Founding Engineer – https://www.ycombinator.com/companies/magnetic/jobs/77FvOwO-... [2] Founding Tax Expert – https://www.ycombinator.com/companies/magnetic/jobs/eReV8hh-...

Rocketable (YC W25) | Founding Engineer - Automation Platform | Onsite (San Francisco or Marin County) | $200K-$250K | 1-4%

Rocketable acquires profitable SaaS companies and transforms them into fully autonomous systems. No human operators. No engineering team shipping features. No support staff answering tickets. Just AI running the entire business.

This sounds crazy to most people, but we think the trajectory is obvious. If we're right, you'll have built the infrastructure that runs a new kind of company.

Interested? More info & application here: https://www.ycombinator.com/companies/rocketable/jobs/CArgzm...

Paperless Post |NYC/Hybrid or REMOTE(US ONLY)|

Hi! We’re Paperless Post, and we help people celebrate moments that matter with our customizable, design-forward digital invitations. The PP Engineering team, a highly collaborative group of developers and technologists, is charged with building and refining a consumer-facing product that millions of people interact with each month. Our individual feature teams each focus on a unique piece of the user experience and are made up of engineers, product managers, QA, and product designers. Our open roles are below:

1. Senior Fullstack Software Engineer, Revenue Growth| Full-Time| React, GraphQL, Golang

2. Software Development Engineer in Test| Full-time| Javascript/Typescript, Playwright, Cypress, Jest, React Testing Library

3. Senior Analytics Engineer| Full-time| SQL & Python

4. Software Engineer, Front End| Full-time| React Native

We offer: competitive compensation + equity + generous PTO/Sick leave + medical benefits + remote-friendly + more!

If you are interested, please apply here: https://www.paperlesspost.com/about/careers/ and shoot me (Briana, Sr talent acquisition lead) an email at: recruiting@paperlesspost.com

Hudson River Trading (HRT) | Experienced Software Engineer — Systems | Hybrid (NYC / US offices, London, Singapore) | $150k–$250k + bonus

We’re hiring an experienced engineer to help build and evolve the platform that powers HRT’s global infrastructure.

You’ll work in Python on automation, provisioning, monitoring, and network tooling across thousands of Linux machines. Strong Python and Linux/UNIX fundamentals are required; experience with Debian, networking, or CI/CD is a plus.

Share your info here: https://www.gem.com/form?formID=65d1b5ca-e5d1-4f4c-a782-ba0f...

Layer Health | https://www.layerhealth.com/ Our engineering team: https://www.linkedin.com/company/layerhealth/people/ Location: BOSTON (Boston Common) or NYC (downtown) - hybrid in both locations; <<NO REMOTE>> Headcount: ~34, hiring ~2 per month

Stack:React / Typescript / Python / GCP

Open Roles (all roles require a MINIMUM of 6 years of work experience): Fullsack Engineer (Senior) Python/React/Typescript * ML Infrastructure (Staff+) * Data Infra Lead/Engineer * ML/Research Scientist (PhD's) * MLE's (looking for CS/engineering background ideally) * Security Engineer

We Offer: * competitive base salary + equity + great health/medical benefits * unlimited PTO * collaborative engineering-first culture

Layer Health was founded in 2023 by leading machine learning researchers from MIT and Harvard Medical School. We are building an AI layer that can accurately and scalably synthesize information from medical records, with the mission to reduce friction everywhere in healthcare. Our LLM-powered platform is solving chart review once and for all, across use cases. For health systems, our first product dramatically accelerates clinical registry abstraction in areas ranging from surgery and cardiology, to oncology. Our long term vision is for our AI layer to safely transform patient care and minimize unnecessary heartbreak. Layer Health’s diverse founding team brings expertise across machine learning, UI/UX, large language models, and medicine.

Email me at mike.hauschild@layerhealth.com for more info!

Saypien | Berlin, Germany | REMOTE (Europe) | Full-time

We're building an AI-native SaaS platform that helps companies extracting actionable insights from data in real-time. Think of it as an architectural intelligence layer that ingests heterogeneous data, learns your business context, and delivers decision-ready guidance.

Tech stack: Next.js, React, TypeScript, PostgreSQL, Redis.

–

Hiring for two roles:

Software Engineer (Full Stack) - €60-157k (incl. Bonus) | Equity

You'll build and optimize our web platform end-to-end, work closely with AI, Product, and Design. Strong Node.js, PostgreSQL, React/Next.js. Experience with LLM integrations is a plus.

AI Product Engineer (Full Stack) - €70-169k (incl. Bonus) | Equity

More senior role bridging product and engineering. End-to-end feature ownership, customer feedback integration, shaping product direction while shipping production code.

–

Small team, real customers, fast iteration cycles, shipping.

Apply: https://work-at-saypien.jobs.personio.com

Elide: It’s like node but reimagined on top of GraalVM.

High performance, polyglot, AI-native runtime. We are in San Francisco, but work remote. Kotlin and Rust.

https://elide.dev