PostHog | Full-Time | Product engineers, backend engineers, Technical AMs, sales leader | REMOTE (all remote) | Hiring GMT-8 to GMT+2

PostHog makes dev tools that help product engineers build successful products.

* we have a public handbook (posthog.com/handbook) if you want to learn how we work, pay and more in complete detail.

* we are growing through more autonomy and transparency not through process.

* we have a ton of scale and a bunch of super interesting technical problems to solve

* we're building 20 more products over the next couple of years, so you could end up building one of those

* public compensation calculator! see immediately what you'd get paid

* we're hiring: product engineers, clickhouse operations engineer, backend engineers, product managers, technical account managers and technical customer success managers.

https://posthog.com/careers

Red Balloon Security | Security Researchers, Software Engineers | NYC, Northern Virginia | ONSITE, HYBRID | Full-time, Interns (paid) | US Citizenship Required | https://redballoonsecurity.com

We are a team of expert researchers and engineers focused on securing embedded devices. We work with partners across critical industries, and on government-funded research programs (think DARPA). "Full-stack" for us doesn't just stop at back end code; it means being comfortable with operating systems, firmware, and signals going over the wire. You'll succeed here if you are a quick learner who loves working independently on tough, technical problems nobody has ever solved before.

Day-to-day tasks might include:

* Tearing apart a device in our lab, reverse engineering its firmware, and finding security vulnerabilities

* Developing an automated, robotic platform for hardware reverse engineering (custom hardware, vision models, user interfaces, etc.)

* Hooking and patching RTOS kernel functions to execute defensive device integrity validation code, without violating real-time requirements

* Building scalable servers for processing millions of device telemetry messages across thousands of concurrent connections

* Maintaining open-source reverse engineering tools (like OFRAK https://ofrak.com) and cooking up fun demos for hacker conferences (like this web game we built for DEF CON in 2023 https://ofrak.com/tetris/)

Our main office is in Manhattan, but we are building out a new office in Northern Virginia. US citizenship required. Bonus points if you have an active security clearance, or are willing to get one.

https://www.linkedin.com/jobs/view/4367488549

yeet | Chicago, IL / Remote | Full-Time

Building a dynamic runtime on top of the Linux BPF sub-system. Looking for extremely talented / passionate Rust developers / Backend Engineers with a deep interest in Linux internals, Distributed Systems, Dev Tools, Great Developer Experiences and Systems programming.

Experience working with distributed systems AND / OR writing highly-concurrent, performant multi-threaded Rust is a must.

Feel free to tell us all about your favorite GNU core utilities / Linux system calls / kernel sub-systems at: work [at] yeet.cx

You can visit us at https://yeet.cx/

Or try our interactive sandbox at https://yeet.cx/play

For more jobs check out https://yeet.cx/careers

Goody | Remote | $150–250K + equity and benefits | US and Canada | Full-time

I'm Mark, the technical co-founder and CTO at Goody. We're building a gifting product that every business can use to recognize employees, retain customers, and accelerate sales. Despite being something everyone does, gifting is one of the areas of commerce yet to be disrupted, and we're working on building the best and most delightful product in this space.

Our product is used by Google, Stripe, Anthropic, Meta, NBCUniversal, Notion, and others, and we also offer a developer API for commerce. Tech stack is Ruby + React + TypeScript, though we're flexible on backend language if you know Python or Node.js better. All roles are full-stack.

We're coming off of a big year and planning for scale in 2026 with openings in our engineering team.

• Staff Software Engineer ($200–250K) — for those who ship at a startup pace and have a great eye for detail

• Senior Software Engineer, Customer Engineering ($150–200K) — if you like to hear a customer request in the morning and tell them it’s shipped in the afternoon

• Senior Software Engineer, Growth ($150–200K) — be the engineer who has the most direct impact on our growth

We're looking for people who have great startup energy, want to win, and bring great vibes to our tight-knit team.

https://jobs.ongoody.com/#hn

Uncountable | NY, SF, London & Munich (In-Person) | Full-Stack Engineering https://www.uncountable.com/hiring/hn

Uncountable accelerates R&D for industrial scientists across leading materials, chemicals, and life sciences organizations. With our SaaS solution, our customers get better products to the market in half the time. Uncountable was founded by MIT and Stanford engineers and has been profitable since 2016. Our team has grown from 50 to 150 over the last two years.

Full-Stack Engineers | $130k - $220k + Equity

---> Uncountable is looking for engineers who can spearhead the development of the Uncountable Web Platform. The position is heavily product-driven and comes with challenges across the stack.

LLM Applications Engineers | $130k - $220k + Equity

---> Uncountable is looking for LLM applications engineers who can push the Uncountable data model forward through LLM-native UI's and application extensions.

--> Summer internships and working student positions are also available.

Learn more: https://www.uncountable.com/hiring/hn

Uncountable is hiring in New York City, San Francisco, London, and Munich.

Contact our CTO directly at jason@uncountable.com

Verkada | Frontend Engineer | ONSITE Full-Time San Mateo CA

I'm Kris, a manager on Access Control at Verkada.

Access Control is a core product at Verkada. We build the systems that power how customers secure and manage their offices, schools, and campuses. Our software unlocks nearly 8 million doors every day. These are mission-critical systems, not internal tools, and reliability and usability matter a lot.

My frontend team builds more than small widgets or forms. We design and deliver entire workflows that bring clarity to complex systems - managing doors, groups, schedules, users - all within a unified, elegant interface. This means working closely with world-class designers (and debating them when needed), but also having the vision and technical depth to lead when design resources are scarce.

I'm looking for a React expert who can bridge craft and leadership: - Lead technically within the frontend team, setting patterns and guiding others. - Collaborate deeply with our web infrastructure and component library teams to shape the building blocks of our platform. - Champion UX - because building secure, intuitive experiences at global scale is as much about design empathy as it is about React/Redux mastery.

This is a team for engineers who want real ownership, visible impact, and problems rooted in production reality. Verkada is pre-IPO with a $5.8B valuation, and the entire engineering org is about 350 people, which keeps scope high and teams relatively autonomous.

Job description: https://job-boards.greenhouse.io/verkada/jobs/5070042007

Email me: kris.linquist at verkada.com

Modal | Software Engineers (Product, System, SDK) | SF, NYC (ONSITE) | Full Time | modal.com

Modal builds the serverless cloud used by many of the most popular AI companies you've heard of. People use Modal for inference, training, batch operations and also, sandboxes. A good example is the Ramp Inspect tool, that was built on Modal sandboxes. https://engineering.ramp.com/post/why-we-built-our-backgroun... — We also recently passed over a billion sandboxes created and on our way to 2B soon.

I am one of the hiring managers here, hiring for the Product Engineering team that builds the observability tooling for our developers. Modal is the cloud for many of our customers and we help them reason about what's happening in their systems, help them expand their use and generally have a good experience.

If you are interested in a product engineering role, please feel free to reach out directly via email at can@modal.com with a recent resume. This role is NYC based and is on-site, so please mention your current location to be considered. I am especially looking for folks with deep ClickHouse, Postgres, Redis, and Python experience.

Product Engineering Role: https://jobs.ashbyhq.com/modal/a4b8b2b6-5d0c-4ba6-9256-b84be...

For all other roles, please apply from our website.

All roles: https://modal.jobs

Fractional AI | Staff/Principal Software Engineer | SF, NY, NC, Dubai | Onsite

We’re a team of experienced generalist SWEs and AI enthusiasts who are building custom AI agents for enterprise clients. No AI experience required: we are actively trying to be the best place in the world to learn applied AI.

I’m Frank, an engineer here. This is the first services-style company I’ve worked at, so for those of you in a similar boat, this is what I’ve really liked so far:

* The learning rate is super fast. 3-4 client projects a year, each with different tech stacks, products, industries, and architectures. Lots of learning resources including a full AI engineering bootcamp when you onboard.

* Our projects are typically high priority and sponsored by prominent executives. The path here for projects to have real impact on usage or bottom line is much shorter.

* We’re “selling pickaxes during the gold rush”. When AI finds its next killer app, we’ll be the first to know about it.

We’re hiring staff+ SWEs onsite with offices in San Francisco, New York, Durham NC, and Dubai. Feel free to reach out to me directly (frank@fractional.ai) or take a look at the full job posting:

https://jobs.ashbyhq.com/fractional-ai/1db16198-e91e-425d-83...

Ashby | YC 19 | REMOTE | Hiring Product Engineers | Sr: $153k-$220k, Staff: $190k-$275k

Ashby is the all-in-one recruiting platform powering hiring at the world’s most innovative companies. If you cmd+f “Ashby” you’ll see that we’re powering many of job postings in this thread!

* Grew our engineering team from 30 -> 60 last year with plans to double again in 2026.

* 80%+ of our engineering team is made up of Senior-Staff+ level Product Engineers. We give an unusual amount of ownership to our engineers to build features end-to-end. Many of our most loved features were build entirely by a single engineer!

* 100% remote asynchronous culture with an even distribution of engineers across North America and Europe

* Full transparency on engineering levels + comp: https://www.ashbyhq.com/blog/engineering/leveling-and-compen...

Stack: TypeScript (frontend & backend), React, GraphQL API, Node.js, Postgres, Redis.

Full list of open roles: https://www.ashbyhq.com/careers

River | Senior + Staff Engineers (Elixir, React, ML/AI) | SF or NYC or REMOTE (US, Europe, South America) | Full-Time | $150K-$250K + equity | https://jobs.ashbyhq.com/river

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

  - Senior Software Engineer (React, Full-stack) | $150K-$220K
  - Staff Software Engineer (Elixir) | $200K-$250K
  - Staff Software Engineer (ML/AI) | $200K-$250K

Tufalabs | Senior research/engineers | Full Time | Zurich, Onsite | 100-200k CHF | https://tufalabs.ai/ Our current focus is arc-agi 3. We recently hired the top #2 kaggler to join that effort. We are looking for people deeply passionate about AI research. I am steering our work culture towards "live-to-work": If you wouldn't be doing AI research working somewhere else, then it is not a good fit. If you don't find yourself naturally reading about AI papers or doing random AI projects in your free time, then it is not a good fit. We have high expectations and a generous equity structure to match.

Tufalabs is an independent AI research lab in Zurich, focused on high-impact academic-style AI research and large-scale LLM development. We care about compute (currently, 6× DGX B200, 2× NVL72 GB300 incoming). Our mission is to push the frontier of AI science while open-sourcing results and building the engineering muscle to pre- and post-train cutting-edge language models. The ultimate goal is automating AI research, with a strong focus on alignment and safety in the limit.

We can only sponsor visas for people with EU nationality. The position is onsite, fulltime. We are self-funded, from what i call "self-propelled machine learning": I applied ML to cool domains and made returns that way. I can give more details about this privately. If interested, email me at benjamin at tufalabs.ai

Atria | Global Remote (almost anywhere) & Hybrid NYC | 10 Engineering roles Atria Health (https://www.atria.org) | product eng, devops eng, platform eng, ...

Our team is operating with the special combination of rigor, empathy, and innovation required to fuel a global shift from reactive sick care to preventative, precision healthcare.

Technologies: Express, React, GCP, Terraform, DBT, MySQL, Snowflake

Apply here: https://apply.workable.com/atria-health/

A human will read every resume sent to hackernewshiring@atria.org

------------------

P.S: We have a new role coming up: Staff SWE, Agentic AI. This role will drive the vision and implementation of agentic AI across our engineering, product, and design teams and later our broader company (clinicians, hospitality teams, ...). This is a special role where we're looking for someone with a strong engineering background who is on the frontier of agentic development. Please express interest via email.

Krea; Fulltime; Onsite, San Francisco, CA, USA.

I'm the cofounder of Krea (https://www.krea.ai/), a company building creative tooling and large-scale infrastructure for multimedia teams. Users range from hobbyists to world-renowned creatives: architects behind the World Trade Center or creative teams at Apple.

We treat research, engineering, and creativity as first-class citizens. We're looking for engineers to join our research, product, and infra teams.

What we value:

- AGI: https://www.matthewnewton.com/blog/arc-challenge-diffusion

- Diffusion research: https://re-n-y.github.io/devlog/rambling/steering/

- Pragmatic LLM reflections: https://maxemitchell.com/writings/i-read-all-of-cloudflares-...

- Low-level computing: https://gab-menezes.github.io/2025/01/13/using-the-most-unhi...

- Open-sourcing AI research: https://www.krea.ai/blog/flux-krea-open-source-release

Current projects:

- WebGL2/WebGPU for node-based tools & CRDTs for collaboration

- Large-scale multimodal model training

- Cross-service metrics, tracing, and observability

- LLM-driven JS bundle optimization

---

Please apply via `ssh apply@krea.engineering`

Copper Home | Staff Embedded Systems Engineer | ONSITE (Berkeley, CA)

Copper Home (fka Channing Street Copper) builds battery-integrated induction appliances for home electrification — we're making decarbonization accessible by putting energy storage inside everyday products, starting with the stove.

The firmware team is small and owns application firmware, device connectivity, automated testing, manufacturing tools, and an MQTT backend for OTA updates and fleet telemetry.

We're hiring a staff embedded systems engineer focused core firmware architecture on the Charlie induction range.

In this role, you may:

- Own major pieces of our embedded platform and prototypes of future products. - Lead improvements to device connectivity (Wi-Fi, BLE, OTA, provisioning, failure recovery) and energy management. - Evolve fleet management, telemetry, and remote management/update systems with a focus on robustness and cost efficiency at scale. - Mentor engineers through design reviews and day-to-day technical collaboration.

Tech stack: C and Python; FreeRTOS on ESP-IDF; 802.11, BLE, CAN; MQTT; AWS

Salary: $182k–$210k + equity

Questions? Send me an email (<username>@copperhome.com) or reply here.

More details and apply: https://copperhome.com/pages/jobs?gh_jid=4119303007

Bubblehouse | Fully REMOTE | Full-Time | $200–250k | Principal Engineer

Bubblehouse is a fast-growing custom loyalty platform, tripling the revenue each year. Headquartered in NYC, the entire team is fully remote and spread across the globe. We power loyalty programs for brands like American Girl and Old Spice.

We’re expanding our lean team of extremely experienced developers. Companies are switching from other platforms thanks to the customizations and flexibility that we offer, enabled by our pace and technical excellence, which we intend to keep for years to come.

We run on Golang and use custom data storage on top of local key-value stores, colocating the storage and compute on dedicated hardware servers, and reading data directly from mmap’ed pages of the database. Ever came across HN saying that one can run Twitter on a single machine these days? We’re doing that in production.

Zero lines of React, almost zero third-party dependencies (carefully vetted), every line of JavaScript manually written with respect and understanding of the web platform. We render HTML server-side like it’s 2005.

Looking for:

1. Top to bottom understanding of the software stack, from the modern-ish web platform to CPU caches.

2. Thinking and problem solving outside the box. (We don’t _always_ go for unconventional solutions, but we do it often enough to require a person who can do justice considering the entire problem space at every step.)

3. Demonstrated ability and hunger to learn new things quickly. (Every month we’re doing things we have never done before.)

4. Broad experience across multiple programming paradigms, platforms and software stacks.

5. Demonstrated care for the software craftsmanship (which can take many forms).

6. Great spoken English, and ability to communicate 9am to noon in New York time zone.

We give you a literally fast-paced environment (with features delivered in days) where you need to solve very challenging problems with practical advanced technology, take on entrenched market leaders, and help entrepreneurs across small and large businesses delight their fans.

Send a plain text cover letter to andrey+hiring@bubblehouse.com. Help us see how you stand out. Summarize your experience. Link to 1–5 impressive things you’ve built and proud of, link to where we can see some of your code, include your portfolio/CV, describe the platforms and stacks you’re an expert in. How did you start programming? What are you most passionate about in technology? What are the most interesting or weird things you’ve done? What are your strongest held professional opinions? Please make your email easy to read, we’ll appreciate that.

(If you have applied before, no need to re-apply, we’ll reach out.)

Numeral | Software Engineer (full-stack, AI team) | Hybrid (NYC) | $175k - $300k

We build sales tax compliance software so companies can focus on their product instead of taxes. We’re one of the fastest-growing players in the space, taking share from incumbents like Avalara.

We’re a small, high-ownership team. My team in particular is applying AI (agents + workflows) to automate and dramatically reduce operational overhead.

What you’ll do:

- Build product + AI infra across the stack

- Work on AI-driven systems (agents, orchestration, internal tooling)

- Ship quickly with real user impact, both internally and externally

If interested, can send resume directly to jerry@numeralhq.com and I'll fast track!

Job description: https://www.numeral.com/careers?ashby_jid=26400013-a45f-4504...

Cheers,

Jerry (Engineering Manager)

Roles: Forward Deployed Engineer (aka Customer Delivery Lead) and Platform Engineer Both roles full-time ONSITE in London, £100–160k + 0.5–1.0% equity grant, visa sponsorship available.

We build an AI system that builds software for complex construction & infrastructure megaprojects to sell things currently only sold by service providers. To do this, we both do whatever it takes to solve complex projects' needs AND build the system that automates ourselves out of it. We just raised our seed round (25m$ valuation) and currently have 4 people, looking to hire 6-10 total this year.

== Platform Engineer Build the system that takes our jobs. Algorithms, infrastructure, shared components, agents, and internal tooling - across the full stack. Our platform engineers build everything from our custom meeting integration to AI coding agent harnesses, sandbox environments, complex shared app features and more.

== Customer Delivery Lead / Forward Deployed Engineer Help build the AI systems that run megaprojects. We’re looking for a customer-obsessed generalist who can understand complex problems and ship solutions - part product designer, part delivery lead, part AI wrangler. In this role you deploy with customers, build software that solves their problems and do whatever it takes to maximally learn about the way they run their complex projects.

Both job postings live at https://planlab.ai/jobs

Spacelift | Remote (Europe) | Full-time | Senior Software Engineer | $80k-$110k+ (can go higher)

We're a VC-funded startup (recently raised $51M Series C) building an infrastructure orchestrator and collaborative management platform for Infrastructure-as-Code – from OpenTofu, Terraform, Terragrunt, CloudFormation, Pulumi, Kubernetes, to Ansible.

On the backend we're using 100% Go with AWS primitives. We're looking for backend developers who like doing DevOps'y stuff sometimes (because in a way it's the spirit of our company), or have experience with the cloud native ecosystem. Ideally you'd have experience working with an IaC tool, i.e. Terraform, Pulumi, Ansible, CloudFormation, Kubernetes, or SaltStack.

Overall we have a deeply technical product, trying to build something customers love to use, and have a lot of happy and satisfied customers. We promise interesting work, the ability to open source parts of the project which don't give us a business advantage, as well as healthy working hours.

If that sounds like fun to you, please apply at https://careers.spacelift.io/jobs/3006934-software-engineer-...

You can find out more about the product we're building at https://spacelift.io and also see our engineering blog for a few technical blog posts of ours: https://spacelift.io/blog/engineering

Alphamatician (alphamatician.com) | Data Pipeline Engineer | Remote | Full-time

We build and maintain alternative data products for institutional investors — structured datasets covering 40,000+ companies globally with up to 15 years of history, delivered via API and SFTP.

Looking for someone to own our data pipelines end-to-end: collection, cleaning, structuring, monitoring, and error resolution. You'd be working directly with the founder.

Stack: PHP (CodeIgniter 4), MySQL (AWS RDS), Python, Node.js. PHP is a hard requirement.

Apply: alphamatician.com/careers

Against Malaria Foundation | Senior Software Engineer | Remote (UK) | Full Time

The AMF works to fight malaria in an extremely cost effective way with insecticide treated bed-nets. Every year hundreds of millions of people will be infected with malaria, and half a million of them will die, with many more being debilitated or disabled. Independent charity evaluators, such as GiveWell, have ranked the AMF as one of the most cost-effective charities in the world for over a decade, due to our long and well-studied track record preventing hundreds of millions of cases of malaria.

Our tech team is just a couple people, and all-remote. Our software is essential to the charity work we do; it is one of the ways we stand out among other charities, by allowing us to automate, analyze, and validate our work in novel ways. Our tech stack includes C# .NET, Blazor, and Python.

If you are a senior SWE in the UK who is interested in making a difference, please reach out to me by email at my first name at againstmalaria.com