Atomic Tessellator | Lead Front-end Engineer | Full time, remote (UTC+12) | https://atomictessellator.com

Atomic Tessellator is the computational infrastructure for advanced materials, enabling defence and aerospace organisations to rapidly model, test, and optimise materials under extreme constraints. Our mission is to remove the materials bottleneck so civilisation can advance at the speed of computation.

We're hiring for an experienced Lead Front-end engineer to take ownership of our platform. Ideally you should be within +- 4 hours of UTC+12, unless very senior. Apply here: https://atomictessellator.com/careers/front-end-engineer

Freeform (http://freeform.co) | Software Engineers | Full-time | Onsite | Hawthorne, CA (Los Angeles County)

Freeform builds AI-native manufacturing systems that unify software, hardware, and physics to produce industrial-scale parts at the speed of human ideation. By treating manufacturing as a single integrated system, we unlock a new era of innovation where complex hardware is designed, built, and scaled without limits. This isn’t just an improvement; it’s a leap forward in how complex metal parts are made, with the ability to revolutionize industries like aerospace, defense, automotive, energy, and beyond. We are backed by top VCs including NVIDIA’s NVentures, Founders Fund, Threshold Ventures, and Apandion.

It’s a small, tight-knit team and you’d have the opportunity to own significant and impactful greenfield projects throughout the entire development lifecycle and much more. Our software team comes from the likes of Google, SpaceX, and Apple, and believes in taking a first principles approach to solving hard problems.

A glimpse into our software landscape - https://www.youtube.com/watch?v=nFWQArUkd5I

Our feature in TechCrunch announcing our $67M Series B Raise! https://techcrunch.com/2026/02/19/freeform-raises-67m-series...

Reqs will vary depending on what the hiring needs are but should be formatted as:

+ Principal Software Engineer - https://grnh.se/27ajbj9k3us

+ Senior Software Engineer - https://grnh.se/m2l08z853us

+ Senior Software Engineer (Embedded) - https://grnh.se/hb838bth3us

+ Senior Software Engineer, Factory Intelligence (Skyfall) - https://grnh.se/lq96qci53us

+ Senior Software Engineer (Edge Data & Telemetry) - https://grnh.se/h9i6f5da3us

+ Software Engineer (Edge Data & Telemetry) - https://grnh.se/0zmdu30j3us

Antioch | Simulation Engineer | New York City | Full Time | https://antioch.com

Antioch is building the simulation platform for robotics and perception systems. Spin up full-stack digital twins, run scenarios to test and validate behavior, and deploy, entirely in software.

Role:

Build high-fidelity models of sensors and physical components:

— Design and implement simulation capabilities for sensors, actuators, and interactivity (contacts, dynamics, timing, noise, artifacts, etc.).

— Build and calibrate simulations for one or more sensing modalities (e.g. cameras, lidar, radar, infrared/thermal, UV), including realistic failure modes and edge cases.

- Model the full sensor pipeline where relevant: optics/RF + noise sources + signal processing (e.g. camera ISP behaviors, radar DSP stages).

Partner directly with customers to ingest their existing physical systems into Antioch (robots, sensors, actuators, environments):

— Translate incomplete specs + messy real-world data into working simulation models with clear assumptions and documented gaps.

— Drive the integration to completion: “runs in sim, matches reality within defined tolerances, and is usable by the customer.”

— Design and implement simulation capabilities for sensors, actuators, and interactivity (contacts, dynamics, timing, noise, artifacts, etc.).

— Build and calibrate simulations for one or more sensing modalities (e.g. cameras, lidar, radar, infrared/thermal, UV), including realistic failure modes and edge cases.

How to apply:

Submit an application to https://antioch.com/careers/38387

OR

Email Jackson at jackson@antioch.com with your resume and answers to the following:

- Please explain what robotics simulation experience you have had (i.e. Isaac Sim, MuJoCo, Pybullet, Gazebo, etc.)

- Please explain what sensor simulation experience you have had (Radar, Camera, LiDAR, Infrared, etc.)

- Please explain what excites you about this role!

[LiveKit](http://livekit.io/) | VoiceAI | webRTC | Remote | Full Time

LiveKit is building the infrastructure layer for the voice-driven era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe agents in production.

Hiring:

>> Forward Deployed Engineer:

https://jobs.ashbyhq.com/livekit/b889ef16-4d5d-4b71-b0a9-682...

>> Developer Success Engineer:

https://jobs.ashbyhq.com/livekit/fdff28df-2245-43c1-bb09-430...

>> Data Engineer:

https://jobs.ashbyhq.com/livekit/10c672df-37aa-412e-8011-340...

>> Staff Security Engineer:

https://jobs.ashbyhq.com/livekit/efc06ff8-37c4-473e-8de8-bbb...

>> Software Engineer, Data: https://jobs.ashbyhq.com/livekit/7b93996d-3492-489a-a6e4-8a8...

Co-founders:

[Russ d'Sa](https://www.notion.so/YCombinator-Posting-2ea3c4901a4280ba9d...) (CEO/Cofounder) & [David Zhao](https://www.linkedin.com/in/davidzhao/) (CTO/Cofounder)

Check out our [blog page](https://livekit.com/blog)

Matterworks.ai | ML Scientist & Engineering | Remote or Hybrid (Boston/Somerville MA)

At Matterworks we are building AI tools to extract insights from the ever-growing corpora of biological data and to unlock opportunities in therapeutic discovery, development, and manufacturing. We are building large-scale deep learning models of biological data to predict the phenotype and behavior of biological systems.

Senior ML Scientist - https://jobs.ashbyhq.com/matterworks/41be74b6-c7cf-4ad3-a908...

Data Manager - https://jobs.ashbyhq.com/matterworks/5a5f7cd3-bf06-4238-b3e6...

Mighty Acorn Digital | Remote (Continental US) | Full Time | https://www.mightyacorn.com/

At Mighty Acorn, we make it easier for governments to deliver world-class digital services. From renewing a fishing license to applying for unemployment benefits, we build digital services that enhance public trust and satisfaction.

Our vision is a world where “good enough for government work” returns to its pedestal: fast, reliable, and frustration-free. We achieve this by empowering people, increasing transparency, breaking down silos, and moving together toward a shared goal.

Specializing in modern software development, DevSecOps, and scalable infrastructure, we focus on leveraging automation to manage complexity, accelerate transformation, shorten feedback loops, and reduce risk to build a world where government programs run reliably, smoothly, and efficiently.

We are hiring for the following roles:

- Software Engineer V - Infra/SRE (AWS/Terraform/Typescript) - Software Engineer IV - Full Stack (Typescript/Java)

https://www.mightyacorn.com/careers?utm_source=hackernews

Eagle | Remote (US), New York, SF | Member of Technical Staff | eagleeng.com

Eagle is building Pixar for the built environment.

Backed by Lightspeed Venture Partners, we acquire and transform civil, structural, and MEP engineering firms with applied AI.

We believe that the world needs more engineers to work on problems in the physical world, and that's why we're going on this journey. We exist so that our people can express creativity and joy in serving the built world.

In 10 years, our ambition is to be the most valuable, talent-dense engineering firm in the U.S.

Apply here: https://jobs.ashbyhq.com/eagle/ef7cb145-536a-4ace-b6de-c8928...

Data Analyst | Redistricting Data Hub | Remote (US)

The Redistricting Data Hub provides individuals, good government organizations, and community groups the data, resources, and knowledge to participate effectively in the redistricting process. In service of this mission, we host thousands of datasets in all 50 states, and continue to add new data that is useful for map drawing and analysis.

We are currently hiring a full-time data analyst to join our team. In this role, you will work with geospatial data, election results, and other key datasets. We're seeking candidates who are comfortable working remotely on a small team, skilled in data processing and analysis, and experienced with Python.

Applications will be accepted through Friday, May 1, 2026. Visit our website for the full job description, including responsibilities and application instructions: https://redistrictingdatahub.org/join-us/work-with-us/

SPADE Agriculture| Full Stack Engineer | https://spade.ag | Remote (US Timezones) | Full Time

Spade is a Series A startup building a wide range of products for the dairy industry.

Think apps for farm data, machine vision for cows and next generation embedded microchips for animal health data (its not evil I promise).

We are building tools with data and AI to create Superhuman Management for both the supply chain ( we have a enterprise suite for the companies that buy and process milk ) and farms.

Our customers are the biggest food companies and biggest dairy farms on the planet.

We are looking for people who love agentic coding, are willing to own whole applications, and want to work with an application that works with real-world data from real-world farms.

Never heard of a Ralph loop? NGMI...

Our best developers have < 2 hrs of meetings a week, we aim to make that 1 hr.

We want to push the limits of what what low bureaucracy, high autonomy building can look like.

We have up to quarterly in person meetups depending on your location.

Good pay and benefits obviously.

Formal Job Post https://drive.google.com/file/d/1nOLxCZJuKNJAOvopil4dxUTppuR...

Apply Here From Hacker News ( not the email in formal post ): https://airtable.com/appgtIW1XInxyXKvn/pagtPpYqGVai0d0lZ/for...

Ria Money Transfer | https://www.riamoneytransfer.com/en-us/ | Hybrid Denver, CO | Full-time

Currently looking for a AI-first full time product engineer to help us on a transform our digital product! Looking for someone with backend experience that is interested in having more product ownership. This is a super exciting time to join and you will have a ton of ownership over what you build!

Feel free to reach out directly, send me some cool projects you've built!: https://www.linkedin.com/in/chbigelow

* Product Engineer, Backend: https://www.linkedin.com/jobs/view/4383274196/?trackingId=mz...

Founding (AI/Software) Engineer + Founding Research Scientist | NYC | https://www.l2labs.ai/

L2 Labs is a brand new applied AI lab advancing database systems, data mapping, and data integration. We're fast growing: we closed a pre-seed funding round, established partnerships with Cornell and NYU, and secured a large enterprise customer in less than 3 months. We are a team of hard-working researchers and engineers who are obsessive about intricate, greenfield data problems - we love whiteboarding, spinning up experiments, ordering pizza, and suddenly it’s 2am and we've actually solved something. We build impactful products + publish in A* research venues.

We are currently seeking Founding Research Scientists + SWEs, with very meaningful upside in the form of a generous equity package. To learn more/reach out, email hiring@l2labs.ai.

Pinwheel | Full-Time | Hybrid (NYC) | Series B | https://www.pinwheelapi.com/company/careers

Pinwheel is the Plaid for payroll — APIs and SDKs that give banks, fintechs, and lenders real-time, consumer-permissioned access to payroll data across 1,800 platforms covering 80% of US workers.

- Fullstack Engineer (backend-leaning) - https://grnh.se/j2bgmdl83us (Python / Django, Go)

- Fullstack Engineer (frontend-leaning) - https://grnh.se/v237ybv83us (React, Next.js)

Hybrid 3x/wk in NYC (Union Square)

Visa sponsorship not available.

Northstar Security | Software Engineer | SF Bay Area | Onsite | Full-time Northstar is a seed-stage cybersecurity startup building an agentic platform to help security teams understand and defend the complex environments they're responsible for. Our semantic layer integrates data from the fragmented security and IT tools that teams have to deal with and allows for an AI-native approach to reasoning over a company's security posture. We're looking for someone with hands on experience building modern AI systems who wants to join an early startup (<5 engineers) and everything that comes with it: working closely with design partners, solving hard technical problems, working in a fast-paced environment and figuring out how to apply agentic AI in practical, novel ways.

Contact me if you're interested - alex@northstar.security

Weave Bio | Full time | https://weave.bio/careers | Series A

Weave Bio has developed an AI-native platform to help research and discovery scientists get through the FDA regulatory submission process faster.

- Senior Backend Engineer (python/django)

- Senior Frontend Engineer (react.js)

- Staff Backend Engineer (python/django)

- Staff Frontend Engineer (react.js)

- Senior Product Designer (storybook, figma)

- Senior Technical Product Manager (biotech, B2B SaaS)

- Operations Specialist, Customer Experience (CX)

Please apply here: https://job-boards.greenhouse.io/weave

San Francisco (SF), Hybrid/Onsite 3 days/week (Tues/Wed/Thurs)

AREO | Remote (EU) | Full-Time | Equity | Roles: [Engineering Manager (Ruby on Rails), Lead Product Engineer (Ruby on Rails)]

My name is Marius and I am the CTO at AREO (https://goareo.com/).

AREO, founded in January 2023 by a team with 20+ years of combined experience in retail and startups, is a young startup specializing in developing innovative solutions for supermarkets and grocery retail stores.

Our cutting-edge B2B SaaS platform optimizes workflows for employees by providing real-time access to inventory, product information, and customer inquiries. We serve large supermarket chains in Germany and across the EU.

About a year ago we brought a backend developer on board through "HN - Who is hiring" and are now seeking a Lead Product Engineer / Engineering Manager with a minimum of 8 years of experience (preferably in startups) as we just closed another large contract with a major retail chain and are growing quickly.

For both the Product Engineer and the Engineering Manager role professional knowledge of German is highly preferred.

If you're passionate about building innovative retail products from scratch, these roles are for you.

Backend Stack: Ruby / Rails (8.x), StimulusJS / Hotwire / Turbo, AlpineJS, Postgres, Docker, DigitalOcean, OpenAPI, LLMs

Perks: Fully remote roles (Europe), work where you are most productive, sizeable equity in a rapidly growing company, flat hierarchies, no-ego work environment, work in a lean but highly experienced team

Apply here: marius[at]goareo.com and mention “HN - Who is hiring?” and the role you are applying for in the subject.

Formical | Software Engineer | ONSITE (Hybrid - Delft, Netherlands) | Full-time | https://careers.formical.bio

At Formical, we believe we can become the first sustainable generation on Earth. Biotechnology plays a key role in this future - benefiting all people, animals, and our planet by making industrial production more sustainable. But bioprocessing still runs on fragmented data and tacit knowledge. The infrastructure to turn data into the intelligence that teams need to scale doesn't exist yet, hindering the sector’s progress. Our product accelerates bioprocessing by connecting fragmented data, enabling predictive modeling, and ultimately closing the loop between measurement and action.

We're not looking for specific skills, just willingness to learn. I joined a couple months ago with little React/TypeScript full-stack experience, but with CC I managed quite well coming from a Python backend background. Nothing's enforced though! We're a small team, have some customers, and are looking to build out the platform and the client-base significantly this year.

Apply via the link above!

Redbook Software | Staff Software Engineer | REMOTE (U.S.) | $200k-$250k

Redbook is the new software of reference for cattle feed yards. We're digitizing the $90B cattle industry, the largest in agriculture. We have built the only cloud-based product in the industry that connects field operations and financials.

Upcoming projects include integration with other #agtech software, tooling to streamline customer onboarding, integrations with hardware, integration with futures market, and much more!

We are a senior team of 5 people, we value autonomy, keep meetings low, and we're fully remote. Our engineers backgrounds include Stack Overflow, Microsoft, Atlassian, Elastic, and ngrok.

https://app.dover.com/apply/redbook-software/fa6c1d33-5de6-4...

Perry Street Software | Remote (EU/LatAM/NA) | Full time | https://www.perrystreet.com/careers

Perry Street Software publishes Jack'd and SCRUFF, two of the world's largest LGBTQ+ dating apps on iOS and Android, is hiring a Senior Ruby Developer

Our brands reach more than 30 million members worldwide, so members can connect, meet and express themselves on a platform that prioritizes privacy, security, and community. As a Senior Ruby Developer, you will help build our Ruby API powering our family of LGBTQ+ mobile dating apps. We are looking for engineers who are passionate about architecture and monads! Ok just kidding about the last part -- but you can see more about our approach to API development in our Medium blog series at https://medium.com/perry-street-software-engineering/clean-a.... The position is 40 hours per week and ongoing/full-time.

Please mention Hacker news in your cover letter.

Denta | CTO | Full-time | Remote| https://trydenta.com

We've already built a dental analytics tool to aggregate and analyze data across the dental industry. We now are looking to build AI Agents on top of our infrastructure to automate away the administrative tasks associated with running a small healthcare company.

We are looking for a A+ player to take charge on this effort. The infrastructure and network is there to sell to existing clients and scale fast.

Open Positions:

- CTO

- Full Stack Engineer

- AI Engineer

- Data Analyst

No experience is required. I'm open to anyone who can demonstrate they are capable.

Pay will be equity, incentive, or salary based depending on your goals.

Email me directly:

jack@trydenta.com jack.r.beecher.27@dartmouth.edu

We're building a system that represents domain knowledge as modular probabilistic models — making analysis rigorous and transparent. Users can connect these models flexibly into larger structures. The system enforces consistency across them, and propagates uncertainty through each step. Our first applications are in finance and scientific research, with use cases ranging from equity valuation and distress monitoring, to particle physics.

This is an opportunity for builders and practitioners to help shape a deep-tech product from its earliest stage.

Current openings:

* Product Software Engineering (Quantitative Modeling)

* Program Synthesis Engineering

* Applied Category Theory Research

* Bayesian Software Engineering

We're also looking for Domain Experts to collaborate on high-value use cases -- identifying and validating opportunities, shaping them into working solutions with our engineers, and taking them from pilot to production with real users. Practitioners with expertise in Valuation Models, Quantitative Default-Probability Models, or Interest Rate Prediction Models are particularly relevant right now.

Find out more, and apply at: https://planting.space/joinus/

Questions? Get in touch: talent@planting.space