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

Freeform is deploying metal 3D printing factories at global scale and setting a new frontier in manufacturing. With AI, GPUs, and FPGAs working in tandem, our system monitors and corrects every microsecond of the process, delivering a level of precision, speed, and quality that’s never been possible—until now. 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, and Threshold Ventures.

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 believe in taking a first principles approach to solving hard problems.

A glimpse into our software landscape - https://youtu.be/nFWQArUkd5I?si=mP17qdKbxvf8qpZN

Our feature in TechCrunch! https://techcrunch.com/2024/10/22/ex-spacex-engineers-land-1...

+ Senior Software Engineer, Factory Software C++ (Skyfall) - https://grnh.se/ddgoq9yh3us

+ Senior Software Engineer (Embedded) - https://grnh.se/5eerse413us

+ Senior Software Engineer (Edge Data & Telemetry) - https://grnh.se/j8jyvaj03us

+ Software Engineer (Edge Data & Telemetry) - https://grnh.se/9z8omwl13us

Knowlix — ONSITE (Munich, DE) — Full-time

About us: We’re building AI agents that automate complex back-office workflows for SMEs. Backed by European VCs; fast-moving, product-obsessed team

Hiring: Multiple roles in engineerin, product & growth (onsite Munich only).

Why join: Real users, real autonomy, ship fast with a small senior team.

Contact: Please apply via the Ashby page (https://jobs.ashbyhq.com/knowlix)

Runway | ML Research Tooling & Data Platform Engineer | Remote US/EU/UK + hubs in NYC, SF, Seattle, London | Full-time | runwayml.com

Runway is building AI to simulate the world through merging art and science.

We're looking for an engineer to own Runway's internal exploratory data analysis (EDA) and evaluation platform used daily by our ML research, design, product, and creative teams.

Apply here: https://grnh.se/iey0qx9m5us All roles: https://runwayml.com/careers

daydream | San Francisco (Onsite) | Full-Time

daydream is an AI-native growth marketing company helping some of the fastest-growing teams use AI to drive sustainable, measurable growth. We’re building systems that sit at the intersection of applied AI, SEO/GEO, experimentation, and revenue; with real production impact, not demos.

We’re growing our technical and growth leadership team and are currently hiring for the following roles:

Applied AI Engineer

Work hands-on with LLMs, retrieval systems, and applied ML to ship production AI features. You’ll collaborate closely with engineering, growth, and product to design systems that move real business metrics; not just model benchmarks.

Staff Engineer

A senior IC role focused on technical leadership, architecture, and setting a high bar for engineering quality. You’ll partner with founders and senior leaders, own critical systems, and help scale both our platform and our team.

Growth Lead

Own growth strategy end-to-end, from experimentation and SEO/GEO to AI-driven insights and execution. This is a hands-on leadership role for someone who can think strategically, execute tactically, and partner deeply with product and engineering.

Careers: https://jobs.ashbyhq.com/withdaydream

Contact: kathleen <at> withdaydream <dot> com

If you’re excited about building at the intersection of AI, engineering, and growth, and want to work on problems that actually ship, I’d love to hear from you.

Category Labs | https://www.category.xyz/ | Remote and NYC | Full Time | $200K USD+

Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team.

Technical Program Manager: https://jobs.ashbyhq.com/category-labs/bdfe89a6-83f6-4ab3-b6...

Senior SWE, Compiler: https://jobs.ashbyhq.com/category-labs/e5c34899-cea1-4d25-be...

Smart Contract Engineer (Solidity): https://jobs.ashbyhq.com/category-labs/776ce314-aa12-471b-92...

Senior SWE (Rust, C/C++): https://jobs.ashbyhq.com/category-labs/45f674b2-d904-482e-a5...

Senior Researcher, Systems: https://jobs.ashbyhq.com/category-labs/015934c5-66e5-4042-94...

Wolf Games is looking for a U.S.-based, fully remote Software Engineer (3+ yrs experience) to help turn creative game prototypes into polished, production-ready web games. You’ll work hands-on in TypeScript and modern web game frameworks (Phaser, Pixi.js, Three.js), building gameplay systems, improving performance, and helping ship new experiences to players. This role is ideal for an engineer who enjoys moving from experimentation to execution and wants to see their work go live.

You’ll collaborate closely with engineering, design, and creative teammates to refine features, refactor early code, and contribute to shared systems that support multiple games. We’re a small, fast-moving team, so you’ll have real ownership, practical mentorship, and the chance to grow your skills while building interactive games in a creative, AI-forward environment.

$45-55/hour, 40 hours per week, contract-to-hire (benefits and equity at conversion) To apply: https://wolf-games.breezy.hr/p/009edf1b1963-software-enginee...

Dynasty | https://www.getdynasty.com | San Francisco, CA (in-person) | Full-Time

Building the next generation of trust & estate planning software

About Us

Dynasty is a fast-growing financial tech startup that makes powerful trust strategies (including QSBS stacking trusts and living trusts) accessible, simple, and affordable. We’re on a mission to help founders and families protect wealth, reduce taxes, and create lasting legacies — all through intuitive digital tools and expert trust workflows.

Why Join Dynasty?

   * Work on products that make a real impact on people’s  financial futures.
   * Be part of a small, passionate team based in San Francisco.
   * Build meaningful expertise in fintech, legal tech, and estate planning.

1. Sales (Full-Time — In-Person)

   * Drive new customer acquisition and revenue growth.
   * Engage with founders, advisors, and high-value clients.
   * Build pipeline and close deals that matter.

   * Guide new customers through our trust creation platform.
   * Ensure successful setup and hand-off to ongoing support teams.
   * Help users understand the value of our solutions and maximize their experience.

   * Strong communication and interpersonal skills
   * Self-starter mentality and ability to thrive in a startup environment
   * Passion for helping customers and learning new domains

Innolitics | US-Based | Remote | Full-time

Innolitics is a remote-only professional services firm. We help medical device companies—from startups to large corporations—develop software and AI for medical devices, validate safety and security, and navigate FDA regulations.

At Innolitics, we are at the forefront of a rapidly evolving industry that increasingly relies on software and AI. As part of our team, you’ll work on projects that improve patient care and safety. From developing AI-driven diagnostics to ensuring cybersecurity, you’ll push the boundaries of what's possible.

In this dynamic field, both regulations and technology are constantly changing. Success requires continuous learning and growth. We foster a collaborative and flexible environment that encourages this.

$120k - $130k + 10% bonus + 3% 401k + benefits

To apply, see https://innolitics.com/join/medical-device-software-engineer...

40GRID - Full-time Remote | Program Manager

Our mission is to empower field-service companies to grow by modernizing and automating their business operations. Every company we work with has unrealized potentials — our task is to build the platform that empowers growth and helps them unlock opportunities.

Email: jobs [at] 40grid.com (no recruiters or agencies, please put HN in subject line, thanks).

Estuary | US-Based / Remote | Full-time – https://estuary.dev/ Estuary is a VC-backed, post–Series A startup powering right-time data replication and transform — from sub-second CDC replication to terabyte-scale OLAP data flows.

We’re open-source, developer-first, and focused on making data movement radically simpler across both our Platform and Applications layers.

We’re hiring for:

Senior & Staff Backend Engineers (Integrations)

5+ years backend experience; Go required, Rust a plus. Own core systems powering real-time data pipelines. Build complex API/database integrations, improve connector frameworks, and tackle deep challenges in performance, reliability, and developer experience.

Backend Engineer (Integrations) – 2–4 years of backend experience. Help expand and maintain our catalog of real-time data connectors to SaaS tools using Python. You’ll work closely with experienced engineers to build and optimize integrations with third-party systems, while deepening your skills in infrastructure and stream processing.

Solutions Engineer - Work with the founding team to help customers use Estuary effectively. Collaborate closely with engineering and product, shape how users integrate real-time data, and feed insights back into product development.

What we’re looking for: Engineers who care about building reliable, maintainable systems and enjoy working with complex APIs and data flows. We value curiosity, clear communication, and a willingness to learn.

Bonus points for experience with CDC tools, open source contributions, or fast-paced startups.

To apply: Email your resume to careers@estuary.dev

Quidient | Software, Mobile, QA, IT, TPM | HYBRID (Columbia, MD) | Full-time | https://quidient.com/careers

About us:

The physical world is still largely unstructured. Quidient is building a new foundational category: Generalized (5D) Scene Reconstruction (GSR). Our API-first platform turns real-world environments into measurable, queryable digital assets—powering applications across defense, infrastructure, and spatial AI.

We work at the intersection of AI, physics-informed models, large scene/world models, and real-time 3D systems.

Open Roles: - Software Engineer, Full Stack (Product / Web) • Build polished web + desktop interfaces on top of our 5D reconstruction engine, including interactive 3D workflows and API-driven experiences.

- iOS Engineer (Opening Next Week) (Mobile / 3D / AR) • Build high-performance iOS applications for real-world capture and reconstruction using Swift, Metal, ARKit, and CoreML in compute-heavy, low-latency environments.

- Senior SDET (iOS / Performance / Automation) • Own quality and release readiness for iOS edge applications, leading automation, CI/CD, and deep performance profiling across CPU/GPU/memory/thermal constraints.

- IT Systems Administrator • Build and scale internal IT for a deep-tech company, supporting cloud identity, MDM, security posture, GPU-heavy engineering systems, and compliance-driven environments.

- Technical Project Manager (Product Development) • Keep complex, cross-disciplinary engineering work moving—owning sprint operations, roadmap hygiene, stakeholder alignment, and execution clarity alongside engineering leadership.

Team & Setup: Small, senior team. Real customers. Real physics. Hybrid roles based out of our Columbia, MD technology center. Company is profitable and doubling this year.

Layer Health | https://www.layerhealth.com/ Amazing (and no ego) engineering team: https://www.linkedin.com/company/layerhealth/people/ Location: BOSTON (Boston Common) or NYC (downtown) - hybrid in both locations; <<NO REMOTE>> Headcount: ~37 and growing Stack:React / Typescript / Python / GCP

Open Roles (all roles require a MINIMUM of 6 years of work experience): ML Infrastructure (Staff+) * Data Infrastructure Lead * ML Engineer * ML/Research Scientist (PhD's) * 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 ML researchers from MIT and Harvard Medical School. We've built (and are live with multiple large health systems/hospitals) an ML product that scalably synthesizes patient medical records. Our LLM-powered platform is solving patient chart review - it 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

Folio | Backend / Product Engineers | REMOTE (US) | Full-time | https://folio.co

Hotel procurement's a $400B industry still running on spreadsheets and phone calls (and faxes!). We're bringing world-class AI search, web automations, and payment infra to this massive space. Folio is a first-of-its-kind marketplace connecting hotels + restaurants with their hundreds of suppliers using our AI-driven concierge-buying, invoice processing, and agentic payments.

Open Roles:

Our 16-person team hails from Plaid, Square, Persona, Slack, and Cruise. We're fully-remote with a hub in San Francisco, NYC, and Durham, and we meet up quarterly at one of our 300+ hotel partners.

- Software Engineer, Product (Full Stack) • Build the marketplace and payments experience that hotel buyers and suppliers love: https://folio.co/jobs/software-engineer-fullstack

- Software Engineer, Backend • Scale our marketplace infrastructure, search, and payment systems: https://folio.co/jobs/software-engineer-backend

Tech Stack: Rails, React, TypeScript, PostgreSQL, AWS, Elasticsearch, DBT, Snowflake

We're at your service: https://folio.co/careers

Sentinel Defense Technologies | Remote (Global) | Full-time | Equity + Deferred Cash

We are building the world's first AI-powered civilian protection platform. Our mission is to provide military-grade threat intelligence directly to non-combatants in conflict zones (e.g., Ukraine, Middle East), enabling life-saving decisions during the critical first 72 hours of a crisis.

We are a Unfunded->Pre-Seed team looking for mission-driven builders who want to solve hard technical problems (GenAI multi-model verification, geospatial analytics, offline-first mobile apps) with immediate real-world impact.

*Open Roles (Founder-Level Commitment):* * *Full Stack Developer (System Core):* Python/Django + Frontend. Ship features weekly. * *Backend / DevOps:* CI/CD, secrets management, high-availability architecture. * *AI / ML Systems Engineer:* Multi-model synthesis (Gemini), refusal logic, drift evaluation. * *OSINT / Intelligence Lead:* Define trust tiers, escalation taxonomy. * *Security & Risk Officer:* Threat modeling, audit logging, incident response.

*Compensation (Transparent):* * *Phase 1 (Now):* Sweat Equity only. * *Phase 2 (Pre-Funding):* Equity + Deferred Cash (Contractually tracked, paid on funding). * *Phase 3 (Post-Funding):* Competitive Salary + Equity. * Note: Strategy & QA roles are Equity Only.

*Tech Stack:* Python, Django, Flutter, MongoDB, Vertex AI (Gemini 1.5/Pro).

*To Apply:* Email PeterJFrancoIII@gmail.com with your resume/GitHub and a brief note on what you'd ship in week 1. Learn more: https://sentinelcivilianriskanalysis.netlify.app/#join-us

AppFolio | Staff Software Engineer, Platform Communications | REMOTE (US), Santa Barbara, San Diego, Dallas, Denver, Atlanta, Chicago | Full-time

Interested in real estate and proptech? The Platform Communications team at AppFolio (NASDAQ: APPF) is looking for a Staff Software Engineer who will be in charge of scaling up our SMS, email, in-app chat and voice offerings. Learn more and apply here: https://www.appfolio.com/open-roles?p=job/olWAxfw8

Stack: Ruby on Rails, TypeScript, JavaScript, React All roles: https://www.appfolio.com/open-roles

Upway | Software Engineers (All levels), Senior Product Designer, Senior Product Managers | Full-time | Paris (ONSITE)

We’re building the biggest second-hand bike shop in the world.

Upway is the leading marketplace for refurbished e-bikes across Europe and the United States.

In 3 years, we grew from 0 to $200M GMV. The tech team grew from a small senior core to ~12 engineers in 2025, and we plan to grow to ~30 engineers in 2026. We also raised a $60M Series C at the end of last year to support the next phase of the company.

This is not a SaaS. We operate warehouses, handle real inventory, and build software that connects logistics, product, and marketplace dynamics at scale.

We’re looking for engineers and product people who like tech as much as business, people who want ownership, enjoy making product and business trade-offs, and care about outcomes, not just systems.

We work with a Shape Up–inspired methodology that gives teams real ownership: shaping problems, building solutions, shipping, and learning from real-world impact.

Stack: TypeScript | NestJS | React | Shopify | PostgreSQL | GCP

Why it’s a great time to join:

- The organization is switching gears: bigger ambitions, broader scope, more responsibility.

- The challenges are growing with the team: product, marketplace, and operational complexity.

- High ownership environment where engineers influence technical and business decisions.

- Paris on purpose: at our current pace, working in person is a real advantage.

Learn more:

- Tech & Product subjects we’re working on: https://like-piper-15f.notion.site/tech

- Open roles: https://careers.upway.shop/

- Contact our tech recruiter: https://www.linkedin.com/in/maeg-horeau-28445b72/

Sequent Tech | Senior Fullstack Engineer, Senior DevOps Engineer | REMOTE (Global) | Full-time | sequentech.io

Sequent builds cryptographically secure online voting infrastructure used in 200+ real elections across multiple countries. We're a fully remote team working on an open-source platform combining Rust, TypeScript, and modern DevOps. We handle End-to-end encrypted voting, cryptographic mixnets, and tamper-evident logging.

Tech Stack: Rust, TypeScript/React, WebAssembly, GraphQL, PostgreSQL, Kubernetes, Keycloak, ImmuDB

Open Roles:

Senior Fullstack Engineer (Rust + TypeScript/React) Senior DevOps Engineer (Kubernetes, Infrastructure as Code)

Reach out: team@sequentech.io

Kyber | Low-level Developers and Sales | Paris area (hybrid) and Remote in Europe | Full-time | kyber.media Kyber is an open-source SDK and platform to control remote machines, from Remote Desktop to Robots Teleoperation/Teleobservation. Kyber is a multi-stream and multi-actuator transport in extremely-low latency, over Quic; it encloses the server, the client and the protocol. One could use Kyber to control robots, drones, desktop, servers in the cloud or just remote rendering of interactive 3D programs. Kyber is done for Remote RealTime, where every millisecond matters. Kyber is developed by engineers from the VLC and FFmpeg community, and we code in Rust, in C and in assembly. We have some development in Go too. We're a quite technical team, but cool to work with. Contact: jobs -- at -- kyber.media (subject: “HN job”)

AI safety spaces!

Evercred (Pre-A stage) | Remote (US) | Technical Co-Founder - AI Agent Infrastructure | $20K/mo + up to 20% equity We're building AI agents that reduce physician credentialing from 90 days to 14 days. $50B market, healthcare orgs desperate for this solution.

THE ROLE: You'd own agent orchestration, monitoring, and ML operations as founding technical leader. We have agents built by external agency launching in 2-4 weeks. You'd evaluate their implementation, build operational infrastructure, and own the technical strategy as we scale from 0 → thousands of verifications monthly.

THE OPPORTUNITY: - 20% equity (founding team level, 4-year vest) - $20K/month cash (adjustable based on equity preference) - Clear path to Series A: $1M ARR by summer 2025 - Own agent infrastructure for industry-disrupting product - Work directly with CEO/CPO, high autonomy

THE REALITY: - 3-4 month runway (aggressive growth targets) - Remote/async-first, US-based for timezone overlap - Paid trial week ($1,400) - mutual evaluation for partnership - Need production ML/agent experience - Must move fast intelligently (AI-assisted development expected)

THE TRIAL: Week 1: Evaluate third-party agent code, build monitoring infrastructure, or pivot to corrective strategy if code needs work. Testing judgment + execution + communication.

LOOKING FOR: - Production experience with LLM agents or ML systems - Can leverage AI tools (Claude/Cursor) to accelerate safely - Comfortable with ambiguity, short runway, high ownership - Wants equity upside, sees potential in healthcare transformation - CTO-level strategic thinking

NOT A FIT IF: - Need structured W2 role with benefits - Want low-risk established company - Optimizing for maximum cash vs. equity potential - Need multiple approval layers for decisions

TO APPLY: Email mark@evercred.com with: 1. Your approach to the trial problem (3-5 sentences) 2. Why 20% equity interests you vs. full cash 3. How you'd use AI tools to accelerate the week

We respond within 24 hours. Strong candidates start immediately.

Healthcare credentialing is broken. Help us fix it.