Polymath | Founding MTS, Full-Stack | San Francisco | ONSITE (5 days) | $160K–$220K + 0.75%–1.5% equity | https://polymathmade.com

Polymath builds AI agents that read engineering drawings, generate CAD models, and rebuild parts across CAD systems. We're VC-backed, Harvard- and Stanford-founded, in production with our first product, and running pilots with Fortune 100 manufacturers in aerospace and consumer hardware.

We're hiring our first dedicated full-stack engineer to own the product stack end to end: the chat UIs inside CAD (TypeScript/React over MCP and REST), the Python/FastAPI services behind them (auth, job orchestration, metered billing with Auth0 and Stripe), and the pipeline that packages and deploys it all. You report to the CEO, join customer calls, and set the standards for the next ten hires.

Looking for: 5+ years running production web apps with ownership across front end, API, and deployment; prior early-stage experience (first 50 engineers somewhere); TypeScript and Python; shipped on AWS or GCP with Terraform/CloudFormation and Kubernetes/ECS/Cloud Run. Nice to have: LLM product ops, enterprise SSO, C#/C++ desktop packaging, any CAD or mech-eng curiosity.

Must be authorized to work in the U.S. Immediate start.

Apply: email careers@polymathmade.com with a resume, a GitHub or portfolio link if you have one, and a few sentences on a system you built and ran in production. I read every application and reply within a week. Full JD: https://polymath-ai.notion.site/careers-1

Location: Bangalore, India (IST / UTC+5:30) Remote: Yes (Worldwide) Willing to relocate: Yes (Worldwide, visa sponsorship required) Technologies: TypeScript, Node.js, Go, Python, React, PostgreSQL, MongoDB, Redis, RabbitMQ, BullMQ, AWS, Docker, WebSockets, WebRTC, GraphQL, OpenAI, RAG, Vector DBs, ONNX Runtime, Grafana/Loki Résumé/CV: https://drive.google.com/file/d/1kHPNmquEQniZlqC8bJYhCKPTztC... Email: shubhankars361@gmail.com

Senior Software Engineer (~5 YoE) building real-time AI systems, event-driven backends, and distributed infrastructure in Node.js/TypeScript, Python, and Go. Available immediately.

Experience:

- Playhouse Media (Senior SDE): Re-architected real-time voice AI for sub-300ms latency (streaming LLMs, STT/TTS), Redis/BullMQ queues, Stripe billing, and Grafana/Loki observability (-80% MTTR) powering https://secretdesires.ai

- Troopr Labs (SDE): Built enterprise AI Agent Assist & RAG pipelines (Jira/Salesforce), vector search, and WebSockets; optimized Node.js concurrency to boost AI throughput by 40%.

- Zeeve (Software Engineer): Built distributed notification and async event infrastructure using RabbitMQ, Node.js, TypeScript, and PostgreSQL.

Shipped & Open Source:

- ServerPulse (https://serverpulse.strangr.space): VPS monitoring platform with a lightweight Go telemetry agent and React dashboard.

- EmbedServe-ORT (https://github.com/shubhankar-mern/EmbedServe-ORT): CPU-optimized ONNX embeddings server with an OpenAI-compatible REST API.

- redis-lua-rate-limiter (https://www.npmjs.com/package/redis-lua-rate-limiter): Atomic Redis Lua token-bucket rate limiter for Node.js.

Portfolio: https://shubhankar-devv-portfolio.pages.dev GitHub: https://github.com/shubhankar-mern LinkedIn: https://www.linkedin.com/in/shubhankar27

RedSeal | Sales Engineer | REMOTE | Full-time | https://www.redseal.net

RedSeal is an exposure management platform. We integrate agentlessly with 2,000+ security and infrastructure systems and devices to model the full hybrid environment (on-prem, cloud, OT, IoT) and show which attack paths and vulnerabilities actually matter. Used by hundreds of Fortune 1000 companies and 75+ U.S. government agencies, including every branch of the U.S. military.

Looking for 4+ years of security presales or consulting, plus deep networking: L2-L4, routing, and multi-vendor firewall/load balancer config. Comfortable with REST APIs and scripting. Bonus: BGP/MPLS/SD-WAN, cloud networking, OT/ICS, CCIE/CCNP/CISSP.

Apply: https://redseal.applytojob.com/apply/GOBu1zg3ZL/Sales-Engine...

UNICEF - REMOTE backend dev - Digital Inclusion Division, Connectivity Credits

We're building a marketplace where local ISPs connect schools and health centers to the internet, prove it via telemetry, and get access to discounted backhaul, IP transit and compute from large infracos.

Currently in pilots in Mexico, Kenya, South Africa, Malawi.

Looking for 1 dev to join a small tech team (3 people) working on this protocol and marketplace, which sits on top of a larger tech team of 30 people at UNICEF Digital Inclusion. Not your typical UN job or culture.

https://jobs.unicef.org/en-us/job/596538/consultancy-connect...

The rest of the team are in Barcelona/Geneva, but this role is remote. 6 month contract to start, with the aim to continue long term.

Hatch | Staff Backend Engineer | REMOTE (US/Canada, Pacific Time hours) | Full-time | https://hatch.co

Hatch makes smart sleep devices and science-backed content to help people build healthy sleep habits, from newborns to adults. Our lineup includes the Hatch Sleep Clock, a contactless sleep tracker with no wearable, Restore 3, a smart sleep clock for adults, and Hatch Baby, plus a library of original sleep audio. Our products are in 1 in 3 US nurseries and we have over 5 million sleepers. We're fully remote with a small engineering team.

We're hiring a Staff Backend Engineer to own the backend behind our mobile apps and IoT devices: Java/Spring Boot and Python REST APIs, AWS IoT and Lambda, MySQL, plus the monitoring and automation (Ansible, Jenkins, ELK, Graphite, Docker) that keep millions of devices running in real homes. It's an end-to-end role, with cloud APIs on one side and physical devices on the other, and you'll work directly with the Mobile, Embedded, and Product teams.

We're looking for 8+ years of backend experience, deep Java 11+/Spring Boot, some Python and Groovy, a track record building scalable REST APIs, and a bias toward the simplest thing that works. Bonus points for MQTT, connected hardware, or Ansible automation.

Apply: https://grnh.se/2fzj9un76us

SadServers | Software Engineer | REMOTE (Canada) | Part-time or Contract | $55 - $75/hr | https://sadservers.com

I'm the founder of SadServers, a SaaS that provides hands-on challenges for Linux & DevOps/SRE engineers and assessments for hiring teams. It was launched (and quickly broken) here on HN four years ago and we've been growing steadily since then (about to pass 1M VMs served).

Besides training and interviewing, companies use our platform to evaluate and/or train their SRE AI agents. I'm looking for a software engineer who can develop this offering, collaborating with customers and working on projects like our own benchmarking, see https://srebattle.com/ (WIP) for example. Our stack is Django REST (backend), Python (runners), Node/React/Vite (website).

Please email jobs@sadservers.com with subject "SRE AI Developer". The hiring process for selected applicants is two steps: one video call and one paid mini-project.

Paramark | Software Engineer (L4) | San Francisco HYBRID (3 days/wk) or REMOTE (US) | Full-time | $199K–$249K + equity

Paramark helps Marketing teams optimize spend across all of their channels and programs. There are proven scientific ways to do this, but they are poorly understood and practiced by only a tiny fraction of teams. Our product ingests data from all of our customers' marketing channels and uses it to train open-source ML models for both measurement and experimentation. This makes it possible for any marketer to use these methods.

In this domain, it's hard to figure out what to build, and it's even harder to be both accurate and simple. You'll be joining a small team -- we have four product engineers. That means owning systems end to end and having real influence over what gets built. Your typical project will start with a high level goal, and you will figure out the rest.

Founded 2023, ~16 people, $8M from Greylock, cash-flow positive. Reasonable working hours: when the Mercury News covered the return of 996 culture, we were the counterexample. "We don't think early stage startup life requires 18-hour days, or even 12-hour days." https://www.mercurynews.com/2025/08/25/silicon-valley-startu.... 4 weeks PTO plus federal holidays, medical/dental/vision (100% of employee premiums, 50% for family).

Looking for 8+ years, full-stack. Some exposure to statistics, experimentation, or A/B testing helps.

Stack: TypeScript, React, Python, Postgres. Google Cloud, Kubernetes, FastAPI, taskiq.

Process: intro call; technical phone screen; one-day onsite in SF (travel covered for remote candidates)

In-person: https://paramark.com/careers/software-engineer-l4

Remote: https://paramark.com/careers/software-engineer-l4-remote

I'm the CTO and I read every application myself. Happy to answer questions in this thread.

Open Education Applications / Neon | Senior Frontend Engineer | Utrecht, The Netherlands | HYBRID | DUTCH REQUIRED

Please note: working proficiency in Dutch is strictly required for these roles, and we kindly ask for no automated applications. The rest of this post will continue in Dutch.

Wij zijn een non-profit die zich inzet om lesmateriaal voor scholen beter, betaalbaarder en flexibeler te maken, in zowel digitale als gedrukte vorm.

Werktijden en kantoordagen zijn flexibel en worden in overleg bepaald op basis van de rol. Wij bieden een competitief salaris.

Openstaande rol:

- Senior Frontend Engineer Ervaring met Yjs of vergelijkbare CRDT frameworks/algoritmen vereist.

E-mail jobs[at]openeducation.foundation met (HN) + de functienaam in het onderwerp, samen met een korte introductie en een link naar je LinkedIn-profiel en/of GitHub. Als er van beide kanten een goede match lijkt te zijn, plan ik graag een kennismakingsgesprek in.

https://openeducation.foundation | https://www.neon.nl