Fold | Remote (US Only) | Senior Frontend Engineer, Senior Design Engineer, Lead QA Engineer | Full-time Fold makes Bitcoin easy through great UX and rewards. We’re building the future of Bitcoin payments and need senior engineers to help us scale.

Senior Frontend Engineer – Work on our React Native apps, ship features and own architecture. • 5+ years exp, React Native, TypeScript, Expo • Bonus: Fold user, passion for Bitcoin

Senior Design Engineer – Build and scale our design system in React Native. • Strong in React Native, TypeScript, modern component libraries • Bonus: Storybook, Framer Motion, design system expertise

Lead QA Engineer – Own automation, quality strategy, and mobile release confidence. • 5+ years in QA, 2+ leading QA or owning strategy • Experience with iOs and Android automation, Maestro/Detox/Appium

Perks: competitive salary + equity, 401k match, unlimited PTO, full benefits, yearly vacation stipend, no Monday meetings, Bitcoin starter pack.

Email tiffany.sawhney (a) foldapp.com or apply here: https://ats.rippling.com/fold-inc/jobs More: https://foldapp.com

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

Chroma is the open-source search and retrieval database for AI applications. It's an open-source database with vector, regex, and full-text search. We support local, single-node, and cloud hosting. Help build the future of context engineering!

We're a team of 17, all engineers today. We work in Rust, Python, Typescript, and Go.

We're hiring for these areas:

- Head of operations

- Product design

- Production engineering

- Platform engineer (Rust)

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

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

Chestnut | Hiring multiple roles (across engineering) | San Francisco + Seattle hubs (hybrid) | https://jobs.ashbyhq.com/Chestnut

Massive opp. Chestnut is the first AI-native operating system for insurance distribution management, tackling a $100B+ spend pool in the largest industry in the U.S. Legacy software and manual processes dominate this space; Chestnut is the only modern platform enabling real-time data, automation, and agentic AI workflows that directly grow carrier revenue.

Our stack: Go, TypeScript/React, Postgres, Temporal, K8s, Dagster, LLMs.

******

We’re hiring:

** Forward Deployed Engineer – Work directly with customers to ship AI-powered workflows and integrations. https://jobs.ashbyhq.com/Chestnut/5d4fd1ec-60f3-4669-a2d2-31...

** Senior Software Engineer – Build core services, event-driven systems, and automation layers that scale. https://jobs.ashbyhq.com/Chestnut/fbbb7601-3d31-48b4-8639-75...

** Staff Software Engineer – Lead architecture and technical direction as we scale past enterprise workloads. https://jobs.ashbyhq.com/Chestnut/f28c5ee5-12aa-4e7b-b0ea-f5...

** Engineer [Agent Orchestration] – Focus on applied systems: multi-agent coordination, workflow automation, retrieval, and tool use. Bridge research to production and design orchestration layers for enterprise reliability. https://jobs.ashbyhq.com/Chestnut/075a0010-bfa5-489e-8808-e9...

** Engineer [ML + Agent Design] – Experiment with prompting, fine-tuning, and novel LLM techniques. Prototype new agent behaviors and push the boundaries of how models reason, interact, and automate in data-heavy domains. https://jobs.ashbyhq.com/Chestnut/0b6e2b45-fab9-47f2-8f10-30...

We’re also hiring for Product & Commercial Lead and Data + Infra roles (details on the site).

******

You'll work on the bleeding edge - embedding enterprise-grade agentic AI at scale. We're looking for engineers who thrive in fast-paced environments and want to make a meaningful impact.

More info + apply: https://jobs.ashbyhq.com/Chestnut

Myndstream | Hybrid London, UK | Full time | https://myndstream.com

Music for health and wellbeing - we're working with leading scientists at MIT, NYU and UPenn alongside a roster of composers to create validated music to improve health and wellbeing.

We are on course to enhance the effectiveness & efficacy of our music through the use of ML.

We've started with hospitality as a launchpad and are now moving into healthcare markets.

Core Stack: TypeScript, Rust (for low-level audio work), React, PostgreSQL, WebSockets, GCP

If you are enjoy ownership, autonomy, design patterns and are a pragmatic generalist then you will enjoy it here.

Hiring Founding Software Engineers in London, UK, - contact me via email: will [at] myndstream.com

Saildrone | Multiple Roles | Onsite/Hybrid (US Only) | SF Bay Area (Alameda) | Full-Time | https://www.saildrone.com/

Saildrone is the world's leading collector of ocean related in situ data via uncrewed vehicle, above and below the sea surface. We work with governments, civic agencies, foundations, universities, and private companies around the globe to derive better information about our oceans and seas - be it sailing drones into the eye of hurricanes to obtain new scientific storm data, mapping out the ocean floor, collecting new CO2 data in hard-to-reach areas, counting biomass to establish fishing quotas, or detecting and stopping illegal fishing and drug trafficking.

Maybe you saw that we've repeatedly hucked drones into category 4 hurricanes[1]. Or maybe that we recently completed a transoceanic cable survey for Meta[2]. And maybe you saw that we just wrapped up a big demonstration for our partners in NATO[3]. Or maybe you didn't see any of that, but you're still intrigued by the idea of autonomous, long endurance sailboats that help us better understand our planet.

Whatever the case, we're hiring for a breadth of different positions across our organization. In software, we're hiring for folks in our Perception, Platform, Frontend, and Vehicle teams. Stacks vary from team to team, but we're looking primarily for folks with backgrounds in C++, Python, and/or JavaScript (Node, TypeScript, React). All software positions are hybrid roles based out of Alameda, just a quick ferry ride across the Bay from San Francisco.

In addition to software engineers, we're also hiring for a bunch of other positions across the company in production/manufacturing, technical operations, and more.

You can see a list of open positions on our career page: https://www.saildrone.com/careers

Please apply through our career page; be sure to select "Other" and specify this HN post when asked how you heard about us!

[1]: https://news.ycombinator.com/item?id=28715110

[2]: https://www.saildrone.com/news/revolutionizing-deep-water-ca...

[3]: https://www.saildrone.com/news/unmanned-unmatched-saildrone-...

Breezy | Product Engineer (Fullstack) | Remote (US) | Full-time | $175k–200k + Equity | https://www.getbreezyapp.com

Breezy is modern field service software purpose-built for residential HVAC companies. We combine thoughtful product design, tight customer feedback loops, and best-in-class technology, including LLMs when they’re the right tool for the job, to help contractors grow, streamline operations, and run world-class businesses. We’re already replacing legacy systems like ServiceTitan and Housecall Pro.

We’re a small, senior team with experience scaling successful startups. We ship quickly, stay close to our customers, and take pride in building products that actually move the needle for our customers.

We’re hiring a senior Product Engineer to help define and build the product. This role goes beyond writing code. You’ll weigh in on product strategy, shape user experience, and explore how emerging tools like LLMs can create real customer value. You’ll work across the stack (TypeScript, React, Node.js, PostgreSQL) and own features from idea to production in a high-velocity environment.

We’re looking for someone T-shaped: broad technical range, depth in a few areas, strong product instincts, and a sharp eye for delivering customer value. You should be genuinely excited about AI engineering and not just comfortable with LLMs and modern dev tooling, but actively raising the bar for how your team uses them.

Tech Stack: TypeScript, React, Node.js, PostgreSQL, AWS Comp: $175–200k + equity, full health benefits, 401(k), remote-first with periodic team offsites To apply: Email jobs+august25@getbreezyapp.com with your resume, links to your work (GitHub, LinkedIn, personal site, etc.), and a short note on why this role and Breezy are a fit for you

Read the Job Description here (https://drive.google.com/file/d/1sD0tlF1f9RG0hF2bjCGMW0LFCR6...)

Radar Labs | Software Engineers (ML, AI, SRE, data platform, full-stack, mobile, security) | ONSITE in New York City | Full Time | https://radar.com - Radar Labs is the geo-location dev tool. - Doing 1B+ API calls per day

- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).

- We're based in NYC with our HQ in Union Square and remote friendly.

Interesting things we're working on:

- HorizonDB, our Geospatial database written in Rust

- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband and other sensors and ML.

- Extracting raw map data from satellite maps and the web leveraging ML and AI

- Anomaly detection to identify spoofed locations

- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time

- Multi-Region AWS K8s deployment, 99.99%+ availability

- Frontend tools to visualize and debug location data at scale

Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com

Gentrace | TypeScript + React | Hybrid (Williamsburg, Brooklyn & San Francisco)

Gentrace helps the most impactful companies in the world like Quizlet systematically test and evaluate their AI applications. We recently raised an $8M Series A from Matrix Partners.

Ideal candidate profile: - We use TypeScript and React heavily. We prefer candidates with strong experience with modern web technologies. - 4+ years experience working in a full stack capacity.

Role info: https://gentrace.ai/eng Email: jobs@gentrace.ai

ether.fi | BE/FE/FS Software Engineer | Denver, New York, Grand Cayman, On-Site | Full-Time | $130k - $200k + equity + health benefits

ether.fi is building the crypto native neobank of the future. We are a profitable early stage company that currently has $10B in TVL, a top five ethereum protocol when ranked by TVL. Our 3 products, Stake, Liquid and Cash all generate revenue and we are scaling up our team to keep up with growth.

We're looking for mid-level and senior-level frontend, backend and full-stack candidates without about 5 or more years of experience building web applications. We use golang, typescript (node.js & react/nextjs) and python, but we are considering candidates with other stack experiences, no crypto/web3 experience required.

Engineering is based across all offices and on site. We highly value in office collaboration & believe it gives us a competitive advantage over other companies!

Only apply if you are ready for a true challenge and to work with a hard working and brilliant team!

Links for reference: https://defillama.com/chain/Ethereum https://dune.com/ether_fi/etherfi-cash

If interested, please apply here: https://jobs.ashbyhq.com/ether.fi?utm_source=wVAJjAdWZJ

DuckDuckGo | Multiple Roles | Remote | Full-time | $178.5k + equity

We are looking for candidates that are excited to join us on a mission to raise the standard of trust online. All of our roles are fully-remote, except where specific locations are noted.

Most of the software engineering positions have been repeating here for years because we've been continually hiring for them, scaling our whole team to now over 300 people—many of those hires have come through Hacker News. We've been improving our hiring process over time, and we know some good candidates may have fallen through the cracks. Some people who tried in the past have had success going through it again, and we still pay for hiring projects.

Senior Software Engineer, Windows Desktop App - $178,500 USD + equity — https://jobs.ashbyhq.com/duck-duck-go/47e569c6-f995-4955-a89...

Senior Android Engineer - - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/57eea673-2519-4afc-a9a...

Senior Backend Engineer - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/abb953ee-5bb7-4637-9f6...

Director, Product Management - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/2a379a3e-ee10-45d2-927...

Senior Frontend Engineer, React/Typescript - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/5d3e230c-ecf4-407a-a3a...

Tax Accountant (US) - $87,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/7b255a8f-91aa-4a0e-b02...

https://duckduckgo.com/car

Datadog | Software Engineers | ONSITE (Boston, Lisbon, Madrid, NYC, Paris, Tel Aviv) | Full-time

Datadog is a monitoring, tracing, logs system, and more, for your infrastructure and services. We build our own tsdb, event store [1][2], distributed tracing tools, cutting edge visualizations, and more. We love shipping great experiences for customers just like us and are growing fast! We write a lot of Go, Java, Python, Typescript (with React), and a bit of other languages. We run on k8s, and are multi-region and multi-cloud.

We're looking for people who can build systems at scale as we process trillions of events per day. Let us know if that's you!

https://dtdg.co/hnwhoshiring

[1] https://www.datadoghq.com/blog/engineering/introducing-husky

[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive

Seeq | https://seeq.com | Staff Software Engineer (Frontend, Backend, Platform) | REMOTE (Some crossover w/ PST required) | Full-time | $140k - $180k + equity. Salary range for US-based; local adjustments for other countries. Seeq creates cutting-edge data analytics software for industrial process data, serving sectors like pharmaceuticals, energy, and manufacturing. Our core product is a robust calculation engine capable of executing advanced math and machine learning algorithms on streaming time-series data. By leveraging generative AI, we enhance usability and accelerate outcomes for our users. We've built up a great remote culture (e.g. annual meetups, a remote office app we created to collaborate) and a dev team that enjoys tackling hard problems that make a difference for our customers (dev blog for more: https://geeq.seeq.com/).

Staff Frontend/Full stack Engineer (React, Typescript, Kotlin): https://apply.workable.com/seeq/j/D08DA1A63C/

Staff Backend (Kotlin, Java. Bonus for experience with search like Elasticsearch, Mellisearch, etc): https://apply.workable.com/seeq/j/38D9C7897C/

Senior Plaftorm Engineer (Kubernetes, Terraform, Grafana): https://apply.workable.com/seeq/j/0C6A35BDE5/

Cosuno | Senior Full Stack Developer (TypeScript) / Senior Machine Learning Engineer – Generative AI | Remote (EU) / Berlin | Full-time | https://www.cosuno.com

Cosuno is a fast-growing tech startup revolutionizing the construction industry with our digital platform for tenders and procurement. We use AI to analyze millions of price data points, helping construction companies create precise and efficient bids. We're looking to expand our team with creative minds who want to solve real-world problems and reshape a massive industry. We are an open-minded, collaborative, and international team.

We're hiring for two key senior roles:

---

Senior Full Stack Developer (TypeScript)

Location: Remote (EU) / Berlin

Stack: TypeScript, React, Node.js, Cypress, Kubernetes, AWS

Mission: Take full ownership of features on both the frontend and backend of our product. You'll have the responsibility to extend and build upon our platform to make it more valuable, reliable, and maintainable. We value a trunk-based development workflow with daily releases, comprehensive end-to-end testing, and a solid CI/CD pipeline.

You have: 5+ years of hands-on engineering experience, substantial expertise in JavaScript/TypeScript, and experience with Node.js (React is a plus). You thrive in an agile environment and have a pragmatic, startup mindset.

---

Senior Machine Learning Engineer – Generative AI

Location: Remote (EU) / Berlin

Mission: Own end-to-end ML workflows from data ingestion to production deployment. You will dive deep into core application domains like price prediction, two-sided market design (ranking/recommendations), or agentic workflows using state-of-the-art LLMs. A key part of your role will be establishing and enforcing MLOps and LLMops best practices.

You have: 5+ years of ML engineering experience, with at least one year working with LLMs. You possess strong Python skills, a proven track record of deploying containerized services (Docker, Kubernetes), and deep expertise in at least one of the following: deep learning (PyTorch, Transformers), ranking/matching algorithms, or LLMops (RAG, evals, fine-tuning).

Interested? To apply and for more detailed information, please see the full job descriptions on our careers page: https://www.cosuno.com/en/company

Metabase | https://metabase.com/ | REMOTE | Full-time | Backend Engineers, Frontend Engineers, and Engineering Managers

Metabase is an open source (https://github.com/metabase/metabase) business intelligence software that lets anyone in your company rummage around in the databases you have. It connects to a number of databases / data warehouses (BigQuery, Redshift, Snowflake, Postgres, MySQL, etc).

Here's a dashboard that has some interesting stats about Metabase: https://stats.metabase.com/public/dashboard/92d6b7ea-7526-48...

This dashboard is built with Metabase so you can see a bit of the product as well.

People rather like the product (https://metabase.com/love). We're a remote team full of people who care about user experience, making complicated things as simple as possible and building things. We have a deeply pragmatic engineering culture and value building things that people actually use vs whatever closes a deal or makes for a good press release. We are doing some interesting things with LLMs and figuring out how to make data explorations with LLMs reliable, inspectable and useful.

Tech stack: Clojure on the backend, Typescript and React on the frontend

Frontend Engineer role:https://jobs.lever.co/metabase/8f02d3fa-edf4-4433-a6d1-4f9e5...

Backend Engineer role: https://jobs.lever.co/metabase/85f454d8-e795-4978-8a2b-4b8bf...

Engineering Manager role: https://jobs.lever.co/metabase/5bf3233d-a162-47b2-8d85-d3650...

Monterra | Remote | Full Time | Sr Full Stack Engineer | https://monterra.ai

We’re building an AI-powered design tool that help electrical contractors plan and win infrastructure projects, including EV charging, energy efficiency, and battery storage. We recently raised a $4.5m seed to grow the team.

Stack: React, TypeScript, Postgres

If you want to ship software that has a real impact on the built world, apply @ https://jobs.ashbyhq.com/monterra/4f8941c3-f2d6-4b45-a908-e0...

Broadn Inc | https://www.broadn.io | Founding engineer | NYC - USA | Full-time | Onsite in NYC - US persons only | Full-stack |

Broadn works with USA manufacturers to help them accelerate the configuration, pricing and quoting process for their industrial products. Our platform handles manufacturers operating in electronic parts, pipes, packaging, aerospace, defense and metal parts.

Our ideal software developer has an incredible curiosity, experience across full development stack. We expect production environment experience, leading with curiosity, great communication skills and full ownerships over parts of the system . We need to solve problems anywhere from the CNC machine to multi-datacentre GovCloud so we look for a problem solver with solid understanding of algorithms, data structures that can write efficient minimal solutions.

This is an on-site role in NYC. We don't work with non-US Persons due to the nature of our work.

- Proficiency in TypeScript and JavaScript for backend and Front-End - this is our core tech stack

- Nodejs, typescript, javascript, bun

- any experience with any of: python, java, scala, rust, go, C#, C/C++

- AWS, GCP, AWS GovCloud, Azure

- React, Vite

- OOP, functional programming

- data structures and algorithms

- Experience with dev tooling:, bash, git, Docker, cloud infra, Linux environments, CICD

- Ability to write minimal, efficient code that solves problems elegantly

Please reach out with your resumes directly to @victor with broadn.

SalesJack | Founding Engineer | Remote (US/Canada) | $200K + equity and benefits | Full-time

Sales software platform (CRM, Prospecting Service) for independent businesses in the construction supply industry. Our customers are blue-collar, entrepreneurial teams who have been underserved by technology. We provide them the tools to compete head-to-head with larger rivals (Home Depot, Lowe’s).

Our founding team comes from Uber and the construction industry. We blend modern tech with a strong understanding of customer needs. We have grown quickly and profitably. We just raised our seed round of financing to accelerate growth and further develop our product.

This role is a key hire with a path to VP engineering. You will collaborate directly with founders to build and grow our engineering org:

-Shape the long-term product vision and roadmap

-Recruit, mentor, and lead a high-performing engineering team

-Roll up your sleeves to code, architect, and deploy core platform features

We’re looking for a full stack engineer with experience managing complex data pipelines and infrastructure. Preference for experience in early companies taking products from early stage to scale.

Stack: Typescript, React, Node.js, Python, dbt, Azure, Airbyte

Job Posting here: https://jobs.ashbyhq.com/salesjack/02dcf448-7904-45bf-b776-9... Feel free to e-mail me (Founder/CEO) directly at ryan@salesjack.com

Freetrade | London (ONSITE) | Full-time | https://freetrade.io | £75k-£150k

Freetrade is a commission-free investing app used by over 1 million people in the UK. Our team is expanding, and we're seeking a Director and 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, located just around the corner from Old Street.

We have several open positions:

- 2x Staff Software Engineers

- 3x Senior Software Engineers

- 5x Software Engineers

- Director of Engineering

Apply here: https://freetrade.io/careers

Beacon AI | https://beaconai.co/ | San Carlos, CA | Full-Time | Hybrid

Beacon AI builds R2-D2 for pilots. We are on a mission to make flight safer, more efficient, and accessible for commercial and defense aircraft operators by applying technology to the flight deck. We are building a modern technology stack with a data platform and web application (Lighthouse), and in-cockpit assistant (Murdock).

With new contracts in both defense and commercial aviation, and a $15M Series A in Q3 2024, we’re scaling quickly! We're backed by Costanoa, Scout, Sam Altman, and JetBlue Ventures - and we’re hiring across engineering to support our next phase of growth.

Open Roles:

- Edge/Autonomy Engineer – C++, Python (includes tracking, prediction, route/path planning)

- Backend Engineer – TypeScript, Python

- iOS Engineer – Swift, SwiftUI

- Frontend Engineer – React, TypeScript

- Cloud Infrastructure Engineer – IoT/Edge

Apply at https://beaconai.co/careers and mention HN. Let’s build the future of flight, together!

Wirespeed | Founding Engineer | REMOTE (US) | Full-time | https://wirespeed.co We are looking for a founding engineering to help us continue our mission of building a fully-automated Managed Detection & Response (MDR) platform.

Our ideal engineer has a broad set of experience across frontend, backend, infrastructure, cybersecurity, and data(bases). If you've been responsible for managing production infrastructure, talking to customers, and having full ownership of your features from start to finish, we'd love to talk with you.

Tech stack:

  * Typescript
   * Frontend: ReactJS/Tanstack
   * Backend: BunJS/NestJS
  * Postgres
  * Clickhouse
  * NATS
  * Redis
  * AWS
  * Anything fun, secure, and scalable