At Holepunch, we are redefining the internet’s architecture. Our open-source P2P platform, Pear, enables developers to deploy applications directly from their machine to users, creating scalable, decentralized applications without traditional server infrastructure.
Why Holepunch?
- Work on groundbreaking technology that prioritizes user autonomy and privacy.
- Collaborate with a team of thinkers and innovators dedicated to reshaping the digital landscape.
- Contribute to a future where technology serves humanity, not the other way around.
Apply now to join our mission:
Senior FE Engineer: https://holepunch.recruitee.com/o/senior-frontend-engineer-1...
P2P Node.js Engineer: https://holepunch.recruitee.com/o/p2p-nodejs-engineer?source...
Senior Node.js Software Engineer: https://holepunch.recruitee.com/o/senior-node-engineer?sourc...
Product Manager: https://holepunch.recruitee.com/o/product-manager-100-remote...
Mobile Engineer: https://holepunch.recruitee.com/o/mobile-engineer-react-nati...
SuppMatch is an AI-powered supplement recommendation engine for e-commerce platforms. We integrate into online supplement retailers, pharmacies, and marketplaces to deliver ultra-personalized, science-backed recommendations in real time. Think of it as the AI intelligence layer for the global supplements market.
Stack: Python, TypeScript, React Native, Node.js, GraphQL. AI/ML: LLMs, NLP, vector databases (Pinecone/Weaviate), PyTorch, TensorFlow, Hugging Face, LangChain. Infra: AWS/GCP, Docker, Kubernetes, CI/CD. E-commerce integrations: Shopify, PrestaShop, Magento, custom.
This is a startup CTO role. You'll own the full technical vision; architecture, AI engine, data pipelines, integrations, team, while still pushing code and joining partner calls. We're live in production, in active commercial conversations across 8+ markets (Poland, Germany, UK, Italy, Austria, Czech Republic, USA), and closing a seed round.
Requirements: Polish & English fluency. Warsaw-based (hybrid). Hands-on experience with AI/ML in production. Previous CTO / VP Eng / founding technical lead at a fast-growing startup.
jacob@suppmatch.ai | https://suppmatch.ai
SuppMatch is an AI-powered supplement recommendation engine for e-commerce platforms. We integrate into online supplement retailers, pharmacies, and marketplaces to deliver ultra-personalized, science-backed recommendations in real time. Think of it as the AI intelligence layer for the global supplements market.
Stack: Python, TypeScript, React Native, Node.js, GraphQL. AI/ML: LLMs, NLP, vector databases (Pinecone/Weaviate), PyTorch, TensorFlow, Hugging Face, LangChain. Infra: AWS/GCP, Docker, Kubernetes, CI/CD. E-commerce integrations: Shopify, PrestaShop, Magento, custom.
This is a startup CTO role. You'll own the full technical vision; architecture, AI engine, data pipelines, integrations, team, while still pushing code and joining partner calls. We're live in production, in active commercial conversations across 8+ markets (Poland, Germany, UK, Italy, Austria, Czech Republic, USA), and closing a seed round.
Requirements: Polish & English fluency. Warsaw-based (hybrid). Hands-on experience with AI/ML in production. Previous CTO / VP Eng / founding technical lead at a fast-growing startup.
jacob@suppmatch.ai | https://suppmatch.ai
https://jobs.ashbyhq.com/trayd
Trayd is building the financial operating system for commercial construction. Contractors still run payroll, compliance, and job costing across spreadsheets and legacy software. We replace that stack with a single platform that automates payroll, union compliance, time tracking, and job costing.
Construction payroll alone moves ~$260B annually in the U.S., and most of the industry still runs on outdated tooling. We’re rebuilding that infrastructure from the ground up.
Small, senior team with high ownership. Engineers own systems end to end and work directly with leadership and customers.
Stack: TypeScript, React, Next.js, React Native, Node.js, Postgres
Location: NYC (SoHo office), fully in person.
Open roles Engineering – Senior Software Engineer Product – Product Operations Associate Implementations – Implementations Analyst, Senior Implementations Analyst Customer Success – Customer Success Manager
All roles: https://jobs.ashbyhq.com/trayd
We're a FinTech company reinventing high-risk-market payments with an integrated digital identity layer. Our team is expanding, and we are looking for a Senior Java Backend Developer and a Senior Web/React Native Developer.
We are fully remote, and we are looking for someone in the same timezone.
Backend: https://tantumpay.com/en/jobs/senior-java-backend-developer
Frontend: https://tantumpay.com/en/jobs/mid-senior-web-react-native-de...
Hi HN. I am an Engineering Manager at Nectar Social, and we're hiring across product, design and engineering.
The traditional playbook of buying ads on social media platforms no longer works for most brands. Buyers make purchasing decisions from organic conversations on social media platforms like Instagram, Reddit, X, and LinkedIn. Nectar listens to conversations in real time, surfaces actionable insights, attributes engagement to revenue, and drives conversions.
We came out of stealth last year and we are on a fast growth trajectory working with brands like OLIPOP, Hatch, K18, and Little Spoon. The company is ~30 FTEs and has many interesting challenges:
1. We ingest data from major social media which brings scaling and performance problems
2. We run AI agents on the content which requires us to control cost and optimize quality
3. We need to present lots of information about social conversations in an understandable way which requires good design.
4. We need to build resilient systems that can work within the constraints of our third party dependencies.
Our tech stack is React, Typescript, AWS, Pulumi, Postgres, Clickhouse and Turbopuffer. We use AI tools thoughtfully to optimize our daily work - Cursor, Claude Code, Graphite, v0 / Replit, and Granola.
The roles we are hiring for:
- Staff Backend Engineer - https://jobs.ashbyhq.com/nectar-social/e5797dfd-275e-4a7a-b9...
- Staff Product Engineer - https://jobs.ashbyhq.com/nectar-social/2f942c62-bc21-41a2-ae...
- Founding Mobile Engineer (React Native) - https://jobs.ashbyhq.com/nectar-social/192caa1d-8f36-472f-b9...
- Senior Product Designer - https://jobs.ashbyhq.com/nectar-social/673bbd54-9a3b-4478-84...
- Senior Product Manager - https://jobs.ashbyhq.com/nectar-social/b63c6254-df3d-406e-83...
Please email careers@nectarsocial.com with "HN" in the subject line if you're interested.
We're building relationship intelligence. Not another CRM, not another note-taking app. Top of Mind turns conversations, meetings, and interactions into structured knowledge you can actually act on. A knowledge layer between raw information and real understanding. Small team, shipping fast, AI-augmented everything (we use Claude Code daily).
Hiring two roles, both remote in EU timezone.
AI Software Engineer — React Native, Expo, Claude Code. You'll build the core product. High ownership, small team, no playbook needed.
Marketing Engineer — B2C marketing, content, growth. Technical enough to build, creative enough to tell the story.
Fullstack Developers
You'll work across the JavaScript and TypeScript layer of our local AI stack. Depending on the project, you might build user-facing applications (mobile or desktop) or contribute to the platform layer that bridges our C++ inference engines with the app ecosystem. Either path puts you at the heart of making local AI usable: whether you're crafting polished product experiences or building the SDK and bindings that other developers rely on. This role suits engineers who thrive in a full-stack JS environment and want to be part of a system where AI runs privately, locally, and fast.
Apply at: https://tether.recruitee.com/o/middleware-engineer-fullstack...
Lead React Native Engineer and React Native Engineers
You will be working on developing cutting edge mobile applications integrating crypto wallets and defi features.
You will also contribute to backend components when needed to support mobile features and unblock mobile delivery.
For Lead - apply at: https://tether.recruitee.com/o/lead-software-engineer-mobile...
For Software Engineer - apply at: https://tether.recruitee.com/o/software-engineer-mobile-deve...
Product Engineer:
You'll own the vision and execution of local AI products, from roadmap to release. Half your time goes into code, the other half into alignment: defining what to build, why it matters, and how to ship it well. You'll lead a pod of engineers across the stack, ensuring that the power of on-device AI translates into products people actually want to use.
This role is for builders who care deeply about the end result: making local, private, and powerful AI accessible through thoughtfully designed products.
Apply at: https://tether.recruitee.com/o/product-engineer-100-remote-4
Rinse provides dry cleaning and laundry delivery services to customers in twelve metropolitan areas in the US and Canada. We have sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. We're now over a decade old - this is a stable, yet consistently growing and innovating, company.
Our engineering team is distributed across the United States and internationally, and has been entirely remote for years now, but a desk can be provided in the above cities if you'd prefer.
We're open to both newly-graduated engineers or more senior engineers, provided they meet our bar. We're particularly interested in true full-stack engineers, with strong React / Typescript / CSS skills to complement comfort in a Python / Django environment. We're also seeking engineers with experience leveraging AI to automate complex operational processes.
We're particularly interested in someone with significant React Native expertise at the moment, as we work to improve the apps our customers, delivery valets, and partners use.
You will join a high-caliber team where collaboration, honesty, and open communication are at the core of everything we do.
Search term bingo: Logistics, Django, Python, Optimization, React, React Native, Postgres, Mobile Engineer, Automation, Delivery, OR-tools, Forecasting
About us: We provide access and visitor management platforms integrating a wide range of technologies. Backed by a large Swiss AG.
Hiring: Multiple roles; backend developer (Kotlin, PHP), frontend developer (Angular Typescript), app developer (React Native), support (1st/2nd level), testers (all roles on-site Munich only, 5 mins walk from Munich Ost).
Why join: Multiple technologies, room for growth, great offices near to the city centre and a growing dynamic team.
Contact: Please apply at jobs [at] any2any.co
I'm Alex, founder and CEO of River. I also wrote the first line of code and still ship PRs.
River is a client-first Bitcoin-only financial institution building the financial app people use every day to save in bitcoin and spend in dollars. We custody over 25,000 BTC, serve individuals and businesses across the U.S., and are profitable. We publish cryptographic proof of reserves monthly and our company financials annually.
Here's what our engineering team is working on:
- Real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API - Next-generation Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure - Scaling our ML/AI systems (Python, PyTorch, XGBoost, LLMs) to automate operations and tackle fraud/risk - A ground-up React and React Native rewrite of our consumer app - Porting our Lightning Network infrastructure from Go into Elixir We're hiring: - Senior Software Engineer (React, Full-stack) | $150K-$220K - Staff Software Engineer (Elixir) | $200K-$250K - Staff Software Engineer (ML/AI) | $200K-$250K Apply at https://jobs.ashbyhq.com/river?utm_source=Zp9nJyqvd4 or email me at alex@river.com and mention HN.