RepSpark | Engineering & Product | REMOTE (US) | Full-Time | https://www.repspark.com

RepSpark is the top SaaS B2B wholesale e-commerce platform for brands in apparel, footwear, and accessories. For example, we're how golf courses across North America and Europe purchase brands like Titleist, Peter Millar, Kjus, etc.

Stack: C#/.NET (Rider on macOS), GraphQL, React, TypeScript, PostgreSQL, AWS (CDK).

We're actively hiring:

* Senior Product Engineer (Full-Stack): Own outcomes across React/TS + C#/.NET + Postgres; help modernize legacy .NET Framework to .NET 8; build/scale ERP ETL & integrations. https://www.repspark.com/senior-product-engineer-full-stack

* Product Manager - Integrations: Own the integrations roadmap; prioritize ERP connectors (NetSuite, SAP, etc.); partner closely with engineering. https://www.repspark.com/product-manager

Email careers@repspark.com with your resume and optionally GitHub/portfolio.

CoPlane (https://coplane.com/) | Design Engineer | NYC or Remote (North America) | Full Time

The world doesn't need another ERP. CoPlane is building the Agentic Orchestration platform that enables enterprises to orchestrate intelligent processes across their existing systems. Founded by ex-Stripe/Segment product and tech leads, we're changing how businesses operate their backoffice - helping them scale intelligence not headcount.

We're looking for an exceptional design engineer to grow our small team of engineers that include ex-founders, open source contributors (authors of neovim and neverthrow), and architects of petabyte-scale data platforms. You'll work with billion-dollar enterprises solving their hardest, most mission-critical automation problems.

If you're excited about working at the nexus of data, automation and AI, and want to make a significant impact in an early, well-capitalized startup with large enterprise design partners, we'd love to hear from you.

Roles: Product/Design Engineer.

For more info and to apply: https://coplane.com/careers

Chroma | ONSITE - San Francisco | Full-time | https://trychroma.com

Chroma is the open-source search and retrieval database for AI applications. It supports dense vector, sparse vector, regex, and full-text search. We support local, single-node, and cloud hosting.

We're a team of 14, all engineers today. We work in Rust, Python, Typescript, and Go.

We're hiring for these areas:

- Product design

- Production engineering

- Platform engineering (Rust)

Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...

More details at: https://careers.trychroma.com

Starbridge | Senior Engineers (Kotlin/Java/React/Typescript) | NYC or Remote | Full-time | starbridge.ai Starbridge is building an AI platform that turns large-scale public and enterprise data into reliable sales insights. We are early, moving fast, and building from zero to one, so this role will have huge ownership and product impact.

Product Engineer: (React/Typescript) who would work closely with product and design to build user-facing parts of the platform. You will craft performant, stable frontends that explain technical concepts to non-technical users and help us iterate fast based on customer feedback.

AI Engineer: Applied AI plus strong software engineering. You will build, evaluate, and deploy LLM-driven features like deep document analysis and interactive chat, working with models from OpenAI, Anthropic, and Gemini. Expect hands-on Python, ML system design, experimentation, and production reliability. Bonus for RAG depth and frameworks like LangChain, LlamaIndex, or Hugging Face.

Backend Engineer: (looking for Kotlin/Java/Scala experience). You'll work across the backend: building enterprise integrations, large-scale scraping and parsing pipelines, and systems that let users apply LLMs to millions of documents to generate insights at scale.

We're looking to build our in-person team in NYC but also open to remote!

Apply: https://starbridge.ai/careers and mention HackerNews or email recruiting@starbridge.ai with your resume.

WalzOps | https://walzforgovernor.org/ | Frontend, Backend, DevOps Engineers | Remote (non-US applicants only)

WalzOps is building fully automated daycare business infrastructure, treating “opening and operating a daycare” as a repeatable software pipeline. We focus on leasing coordination, synthetic receptionist systems, electronic paperwork submission, compliance workflows, scheduling, and payments, with the goal of replacing manual, human-heavy operations with end-to-end automation.

We’re hiring frontend engineers to build complex form-driven dashboards and operational UIs, backend engineers to design workflow engines and APIs for licensing, compliance, and automation, and DevOps engineers to own deployment, infrastructure, and repeatable multi-tenant environments. Our stack is modern, cloud-native, and automation-first, and we value people who enjoy turning messy real-world processes into deterministic systems.

This is a full-time, remote role with an async-first team. Non-US applicants only. Apply by emailing hiring@walzforgovernor.org with a short note about a boring business you’d automate next.

Cloudflare Durable Objects | Multiple roles | REMOTE | https://www.cloudflare.com/developer-platform/products/durab...

Durable Objects is the Cloudflare Developer Platform's product for building stateful serverless applications.

We are hiring:

- Senior level systems engineers: https://job-boards.greenhouse.io/cloudflare/jobs/5390243

- Senior level product engineers: https://job-boards.greenhouse.io/cloudflare/jobs/7408167

- An engineering manager with systems engineering experience: https://job-boards.greenhouse.io/cloudflare/jobs/7493943

Lantern | https://withlantern.com | Software Engineers (Python, Full-Stack) | Full time in New York, NY (ONSITE) Lantern is building AI-powered revenue intelligence—think autonomous agents that turn cold outreach into warm conversations. Our platform automatically detects buying signals across your tech stack [1], prioritizes opportunities, and helps B2B sales teams focus on deals that actually close. We're an agentic-first startup building with Python, FastAPI, Next.js, and React, backed by a modern data stack (Postgres, ElasticSearch, ClickHouse, DuckDB). We deploy on Kubernetes/AWS and use Temporal.io for workflow orchestration. We're hiring software engineers who want to work on cutting-edge AI and agentic systems. You'll translate complex customer needs into scalable architecture, optimize AI model efficiency through prompt engineering, and ship features that directly impact how revenue teams operate. We value ownership, bold ideas, and people who want to push boundaries. This role is based in our Manhattan office (4 days/week in-person). We offer full health and dental coverage. Apply here: https://forms.gle/kEi5MDDiaJKdyN3fA I'm Maksym. If you're excited about agentic AI and reshaping B2B sales, shoot me a note at maksym <at> withlantern.com.

TeeMail/OpTee | Sales | USA Remote | Commission-based| teemail.io We're building automation tools for the golf industry. TeeMail handles inbound booking inquiries for golf courses automatically — parses emails, checks availability, sends responses. OpTee is a dashboard for tour operators managing tee time inventory across multiple courses. Live customers include premium resorts in Ireland and USA. Looking for someone to own US sales. The role:

Commission-based, uncapped Target: golf courses, resorts, tour operators, destination management companies Short sales cycles, clear ROI pitch (staff time savings, faster response = more bookings)

Good fit if you:

Have golf industry connections or hospitality/travel tech sales experience Can work independently and actually close deals Want equity upside in an early-stage company

Stack: Python, PostgreSQL, NLP for email parsing, integrations with booking systems Interested? Email info@teemail.io with a bit about your background and how you'd approach the US golf market.

Freetrade | London, Budapest (ONSITE) | Full-time | https://freetrade.io | £75k-£140k

Freetrade is a commission-free investing app used by over 1 million people in the UK. Our team is expanding, and we’re seeking software engineers to evolve and scale our core investing platform.

In this role, you will be instrumental in building and maintaining reliable and trustworthy systems for trade execution, clearing and settlement, asset servicing, and internal operational tools.

You will also play a key role in shaping our technical direction and mentoring other engineers as our team grows. Tech we use: TypeScript, Node.js, Postgres, and GCP

Note: We are three days in the office We don’t sponsor visas at the moment.

We are hiring across the board in engineering, data, people, marketing, risk & compliance and finance.

See all of our opportunities here: https://freetrade.io/careers

Ziva.sh | Expert Godot developer | Remote | Contract position

Ziva.sh makes developing games in Godot over 2x faster. We are an early stage company with developers in Canada, US and India, and are looking for Godot experts to use and enhance our product.

Compensation depends on developer ability, and we offer flexible hours and equity.

Email dan@ziva.sh with a brief overview of your Godot work to apply.

Ploid AI | Barcelona, Spain | HYBRID (preferably on-site) | Core Team | Full-time + Equity

We’re building an AI-first bioinformatics platform to empower life science researchers with agentic AI and LLMs. Backed by pre-seed funding, a government grant, and real demand from biotech and seed companies, we’re looking for versatile engineers to help us shape the future of AI in genomics.

What you’ll do:

• Architect and build AI workflows, agentic interfaces, and data pipelines

• Work across the stack: Go, Python, TypeScript

• Contribute to system design, infrastructure (AWS, Docker, Terraform), and devops

• Collaborate closely with scientists and iterate from prototype to product

• Help define our technical culture and roadmap as a core founding member

Nice-to-haves (not all required): LLM integration, RAG systems, HPC infra, ML, cloud/on-prem hybrid systems

About us: We’re an early team of engineers and scientists with strong academic and industry backgrounds (ex-BCG, PhD in Plant Biotech, M.Sc. AI). We’re committed to building something impactful, technical, and genuinely useful for life science.

Apply: hello@ploid.ai

More about us: https://ploid.ai

We also consider internship requests from strong student candidates.

IMPORTANT: We are now seeking for expertise in frontend / full-stack and PhDs with AI applied to life science bioinformatics (multiomics and/or chem)

Thanks everyone for all the support in our August and September posts! HN really helped finding amazing engineers.

teenage enginering | senior backend developer | full-time | stockholm ONSITE | https://teenage.engineering

hello, as head of it, i'm looking for another top backend developer to expand our it team. the it team builds and runs the tech infrastructure for teenage engineering, supporting all parts of the product journey for the worlds best products. onsite only (no relocation - you must already live in stockholm).

apply here: https://careers.teenage.engineering/jobs/6907741-senior-back...

Gobii AI | Senior Software Engineer | REMOTE (US) | gobii.ai

Gobii is the easiest way to deploy browser-use agents in the cloud or on-premises. We're building an open-core AI workforce platform—browser-native agents and automation tools. We have paying customers.

The entire team contributes to browser-use. We also have contributors to Apache NiFi, LiteLLM, and RA.Aid (open-source coding agent I created). Open source is core to how we build and how we think. We're backed by Open Core Ventures.

HQ is San Francisco, but much of the team is in the DC area. East Coast timezone preferred, DC area even better—but we're fully remote.

What we're building: The orchestration layer for browser-use and AI agents. Systems that navigate, reason, and execute on the real web.

Who we're looking for: You've built agentic systems that shipped to production. You have opinions about tool use, context management, and why most "agents" are just glorified prompt chains. You strongly prefer working in the open—a significant part of this role is contributing to OSS repos. We strongly prefer candidates with existing open source contributions.

Why now: We have strong traction and are expanding the team. You'd be early—with real influence over product, architecture, and how we work. High autonomy, high trust, small team of people who know what they're doing.

Comp: Cash + healthcare + modest 401k match + options. In line with SF-based VC-backed startups at pre-seed stage.

Stack: TypeScript, Python, browser automation, LLM orchestration.

Email: careers@gobii.ai (subject: "HN")

9 Mothers Defense | Robotics Engineer, Data Scientist | Austin TX | Full-time | ONSITE

We're building AI-driven turrets that stop hostile drones - where robotics needs F1-level speed.

We're looking for smart, T-shaped teammates: people who are experts in one area but happy to jump in wherever needed. Our software team is small, so every member makes a real impact.

If you want to write motor control in Rust, optimize camera processing with custom CUDA kernels on Jetson, or rework a transformer-based tracker to handle small objects - you can do that here, and much more.

US persons only

https://jobs.ashbyhq.com/9-mothers

In addition to the search tools mentioned above, feel free to use https://nthesis.ai/public/hn-who-is-hiring. You can search and chat with the posts on this page. Hope it helps!

Circadia Health | https://circadia.health | El Segundo (LA Area) | Full-Time | up to $220K USD

We help save lives through early detection of cardiopulmonary conditions using our proprietary radar-powered contactless sensor and AI. Our technology touches 40,000+ patients daily across nursing homes and home health.

AI Engineer: https://www.linkedin.com/jobs/view/4320193874/

MiLaboratories | Bilbao, Spain | ONSITE | VISA SPONSORSHIP | RELOCATION SUPPORT

We are MiLaboratories, the team behind Platforma.bio & MiXCR. We are building the "OS for Biology"—a platform that processes terabytes of genomic data to accelerate antibody discovery and drug development.

We are a deep-tech research lab, not a typical SaaS. We work fully on-site in Bilbao because the complexity of our problems (high-performance computing + biological nuances) requires high-bandwidth, in-person collaboration.

We are hiring for two core roles:

1. Senior Go Engineer: You will build distributed systems for high-load genomic data processing. This is not CRUD. We need someone who understands memory management, concurrency, and algorithmic efficiency at scale.

2. Bioinformatics Developer (Antibody Discovery): You will work on the scientific core, developing blocks for NGS data analysis and antibody structure prediction. You should be fluent in both code and biology.

The Offer:

Comp: Top-tier EU salaries (~€90k - €120k).

Tax Advantage: Bizkaia has independent tax autonomy. You qualify for the "Special Impatriate Regime" (30% salary tax exemption + expense deductions).

The Reality: Your effective tax rate drops to ~15-20%, yielding a significantly higher net income than London or Berlin.

Stock: We grant ESOP and treat equity as a life-changing wealth vehicle, not a "nice to have."

Relocation: Comprehensive "Soft Landing" package (Visa, temporary housing, school search).

Location: Bilbao is a hidden gem—ocean, mountains, and high quality of life with a low cost of living.

Process: No HR screening. You will talk directly to the engineering team.

Email me (I am the CEO): stanp@milaboratories.com. Please mention "HN" in the subject and include your GitHub.

ModPhone.ai | Business Development | REMOTE (US) | Commission + Equity | modphone.ai

AI-powered phone/SMS/email/chat platform for schools, cities, and SMBs. Live paying customers, 60-second setup, multilingual.

Role: Own outbound—cold calls, LinkedIn, email. You eat what you kill. Comp: Uncapped commission (20-30% of first-year ACV) + early equity. Path to base as you prove out.

You: Hungry, self-directed, comfortable on the phone. Bonus: E-rate/EdTech/GovTech experience.

Founder-track role. Small technical team (ex-Google, GitHub) and seasoned sales team (20+ years in telecom).

Email hello@modphone.ai

Hiring: Fullstack Engineer and UI Designer (Remote, LATAM) – BudgetSimple

BudgetSimple is a no-code app and site builder for personal finance coaches, creators, and advisors.

We’re growing the platform and looking for: * Fullstack Engineer * UI Designer

Both roles will work directly with the founder on a real, production SaaS used by paying customers.

Fullstack Engineer React, Python (Flask), Postgres Build and ship full features end to end Care about clean code and simple systems Bonus: SaaS, no-code tools, Stripe

UI Designer Design clean, modern, highly usable web app interfaces Dashboards, forms, workflows, design systems Strong product thinking and attention to detail Bonus: SaaS, fintech, no-code products

Both roles are fully remote. We are specifically looking for candidates based in South America, Central America, or Mexico.

Email sam [at] budgetsimple [dot] com with: A short intro Links to work you’ve built or designed

Thanks!

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...

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

Infrastructure Engineer, APAC: https://jobs.ashbyhq.com/category-labs/ea8cf4f7-0db7-43e9-af...

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...