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...

geeksprep is hiring for multiple profile ,pls check https://geeksprep.com/careers

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

Flux.ai | Sr. Platform, Sr. Front End, Sr. SWE (Agentic Products), Sr. DevOps, | San Francisco, CA | ONSITE | Full-time

Flux developed the first AI Hardware Engineer integrated into a browser-based EDA, where hardware engineers can collaborate live and design hardware together from around the world. Our goal is to democratize the ability to create bleeding edge hardware, and revolutionize how electronics are designed and built.

Our agent isn’t an AI “assistant” bolted onto a legacy CAD tool. It’s built deeply into the system: you give it a job, it proposes a plan, explains decisions, and executes real workflows inside the editor: selecting parts, generating schematics, placing and routing with awareness of constraints, and running checks along the way. It works transparently, seeks feedback, and gets better over time by learning its user’s standards and preferences.

Tech Stack: [TypeScript, React, Node.js, Rust]

-- SENIOR PLATFORM ENGINEER -- Build and maintain user-facing platform features, write TypeScript/Node backend services and React frontend components, and more. Requirements: experienced in shipping production full-stack web apps, integrating and maintaining 3rd party APIs, debugging, cloud hosting [...]

-- SENIOR PRODUCT ENGINEER, FRONT END -- Define and evolve the frontend architecture of a large-scale, real-time browser-based engineering tool, and more. Requirements: React/TypeScript, shipping and iterating on complex interactive web applications, passion for UX [...]

-- SENIOR SOFTWARE ENGINEER, AGENTIC PRODUCTS -- Develop agentic reasoning capabilities, Integrate AI behaviors, perform Instrument telemetry and logging, and more. Requirements: [e.g., experienced with Generative-AI or agentic systems, integrating LLM-based systems, and you have built asynchronous distributed systems in production [...]

-- SENIOR DEVOPS ENGINEER -- You will improve the reliability, availability, and operational health of production systems, and more. Requirements: [e.g., operating and scaling production systems with uptime and latency goals, using observability stacks, defining SLOs/SLIs [...]

Benefits include comprehensive Medical, Dental, Vision, 401(k), and Stock Options so you have true ownership in what we build.

To apply, please email bryan.houser@flux.ai with your resume and mention HN, or apply directly here: https://jobs.ashbyhq.com/flux

Electric Twin | London, UK | Hybrid (4 days/week in office)

Electric Twin builds simulations of real customer audiences, so teams can test decisions before shipping them — fast, safely, and at scale. We just raised $14 million and are growing rapidly.

We’re a small, team backed by top investors and operators, working with real clients on real problems. We’re hiring engineers (and other roles) who want high ownership, meaningful impact, and to help shape both the product and the company as we grow.

https://app.welcometothejungle.com/companies/Electric-Twin

Feel free to reach out directly if you'd like to know more: https://www.linkedin.com/in/smithharryh/

Visoid [0]| Software Engineer | Full-time | €55-80K | ONSITE Oslo | Typescript, Vue, Nuxt

We’re building a web-based application for architects that speeds up their design workflow and makes high-quality visualization accessible to a wider audience.

We have experienced rapid growth in recent months and we are hiring to further scale the company. We have customers in over 120 different countries, who collectively have generated over 6 million visualizations on our platform since 2023.

* Flexible work hours

* Flexible home-office arrangement

* 5 weeks vacation

Apply: https://visoid.homerun.co/software-engineer-3/en

[0]: https://www.visoid.com/

Moyai | Amsterdam, The Netherlands | FULL-TIME | ONSITE | Founding Platform Engineer | 60k-100k + Equity

About the company:

• Technical founding team with relevant industry experience (part of Nvidia Inception Program)

• Backed by well-known European VCs (SpeedInvest + Galion.exe)

• Building anomaly detection and agentic evaluation on top of AI agent observability stack (Otel Native)

Ideal candidate:

Experience in open telemetry and observability. Preferably in a cloud native startup environment and excited to help product teams achieve maximum developer velocity with best-in-class DX and dev tooling.

Reach out to the founder directly: https://www.linkedin.com/in/rhommes/ or visit our website https://moyai.ai

Normcore.io | Senior SWE Kubernetes / Devops Engineer | Full-time | $100-140K USD | Remote PT/ET Hours | Kubernetes/Typescript/Node/Postgres roles

I'm the founder of Normcore.io, an autoscaling game server hosting service and Unity plugin that includes all of the pieces you need to create a multiplayer game. We launched a few years ago and have hosted over 1 billion multiplayer games since launch. I'm actively scaling the team to keep up with the scale of our systems.

We’re all ex-Unity/Google folks working on making great SDKs and tools for multiplayer game development. We also make our own VR titles that are built on top of our own networking tech: https://www.youtube.com/watch?v=djsPTbs7R_w

Reasons you’d love working with us:

* Work with a small, focused, and extremely talented team of developers.

* Fully remote job with flexible working hours and vacation (Our whole team is remote too)

* High-quality codebase, code reviews, tests.

* High work satisfaction, own entire features, and work on an SDK that’s already used by 100,000+ developers.

If you're interested, please send me an email to careers@normalvr.com with your LinkedIn and a few sentences about why you would be a good fit for the role.

MixRank (YC S11) | Software Engineers | 100% REMOTE (Global) | Full-Time MixRank processes petabytes of data every month from web crawling. We have hundreds of customers using our data products including Google, Amazon, Facebook, Intel, and Adobe, across industries including Finance, Recruiting, Sales, Marketing, and Security. We’re a fully-remote company with a global footprint in over 20 countries. We're growing, profitable, employee-owned, no dependence on outside funding. Applicants from all geographies and backgrounds are welcome. We are looking for passionate individuals for whom programming is not just a job but it’s something they love to do. We're obsessed with computers, programming, big data, databases, compilers, hardware, math, data science, and the internet. Does this sound like you? Please apply to join our team. Our code base is very friendly to new contributors. You'll have a fully-functional development environment within hours (fully automated) and be pushing commits on your first day. Deployments to production happen multiple times per day and finish in less than 2 minutes. Effectively all of our codebase is written in Python, Rust, SQL, Javascript/TypeScript, and Nix. The core technologies you'll need familiarity with to be productive are Python, PostgreSQL, Linux, and Git.

We operate at a larger scale than typical startups. We operate two datacenters with high performance servers we've built that are capable of dealing with the volumes of data we process. We've implemented our own distributed file system. We do full-scale web crawls. We download and perform static analysis on the entire universe of Android APKs and iOS IPAs that are published. Unlike a typical startup where you'll spend half of your time in meetings, and the other half fixing bugs from Jira tickets— at MixRank you'll get to challenge yourself with difficult technical problems that will help you to grow as an individual.

We're hiring continuously for the positions below— they aren't singular positions that will close once filled. Our philosophy on hiring is that the candidate is more important than the position. For each new member of the team, we design a custom role and responsibilities that are specialized to their interests. Other companies will come up with a long list of specific requirements for a position with the expectation that you'll exactly replace someone from the team, or that you'll be the perfect tetris piece that satisfies the job requirements decided by a committee. MixRank is more pragmatic: we'll first get excited about having a unique individual on the team, then we'll figure out the best way to accommodate their specific talents.

-- Junior Software Engineer - Remote (Global), Full-Time

We're looking for remote junior engineers that have 0-3 years of professional experience in software, and 5+ years of curiosity exploring computers, programming, and technical hobby projects. This is an open-ended entry role with mentorship and diverse opportunities to work on all areas of our product: databases, distributed systems, infrastructure and tooling, data analysis, machine learning, frontend/backend web development, APIs, data mining, data modeling, and more. To stand out, please highlight what makes you unique: passion for computing, curiosity and side projects, work ethic, niche research, etc.

Ideally you've already graduated, but if you still have one or more years left of school, please feel free to apply anyway, and if you're the right fit for the team we'll figure out a way to accommodate your schedule. https://www.ycombinator.com/companies/mixrank/jobs/Fnwsojk-j... --

Software Engineer - Remote (Global), Full-Time

We're hiring generalist software engineers to work on web applications, data mining, machine learning/data science, data transformation/ETL, data modeling, database scaling, infrastructure, devops, and more. We'll cater the role to whatever subset of these areas match your interests.

Beneficial experience includes PostgreSQL, Python, Rust, Linux, TypeScript, Nix, frontend/backend web development, and data mining.

https://www.ycombinator.com/companies/mixrank/jobs/RXQspen-s...

--

I’m Kiran, Chief of Staff (CoS) at MixRank, a fully remote data startup building go-to-market intelligence. We’re US-incorporated but hire globally, and we’re bringing on new teammates to join a fast-moving team with real ownership and impact.

Prior Labs | Berlin / Freiburg / NYC | ONSITE & REMOTE (EU) | Full-time

Tables power every clinical trial, financial model, and scientific experiment, but deep learning has mostly ignored them. No natural sequence, no spatial structure, no shared vocabulary across datasets. LLM architectures don't transfer. We built TabPFN, the first foundation model that actually understands tabular data (published in Nature, 3M+ downloads, new SOTA for tabular ML). The hardest problems are still open.

The model is half the product. The other half - training infrastructure, real-time serving, developer platform, reliability - is what turns a research breakthrough into something enterprises trust in production. We're hiring across both.

ML Engineer, Cloud Platform — Design and scale the core infrastructure for serving and finetuning foundation models in production. Early enough that you're making the architecture decisions, not inheriting them.

ML Engineer, Training Infrastructure — Own GPU infrastructure, distributed training performance, and the developer productivity layer (CI, experiment tracking, model registry) that keeps research moving fast.

Full Stack Engineer, ML Platform — Build the product that puts tabular foundation models in users' hands, from data upload through inference and results. You'll work across frontend, backend, and directly with the research team to turn new model capabilities into production features.

Research Engineer, Foundation Model — Design experiments, run ablations, build training infrastructure, contribute to papers. Research engineers here aren't supporting scientists — they are the science team.

Also hiring: Research Scientist, Applied Scientist, Forward Deployed ML Engineer, Developer Relations Engineer, AE, BDR.

20-person team selected from thousands applicants. Backgrounds from Jane Street, Google, CERN, G-Research. Led by Frank Hutter, advised by Yann LeCun and Bernhard Schölkopf. With backing from Balderton, XTX Ventures and leaders at Hugging Face, DeepMind, and Black Forest Labs. Comp competitive with top AI labs, meaningful equity.

Apply at: https://jobs.priorlabs.ai

YCharts | Software Engineer | Full-Time | REMOTE (US only) | 140k - 180k USD + benefits | https://ycharts.com

YCharts is an investment research platform that financial advisors and asset managers use to make smarter investing decisions and create visuals that effectively communicate their strategies.

We’re looking for a mid-level or senior engineer to join our AI engineering team. Our team is primarily focused on building AI agents for investment research, financial data visualization, and advisor meeting preparation.

Our stack includes FastAPI, Django, Angular, Valkey, Pinecone, MySQL, and models from OpenAI and Anthropic.

If you're interested, email me at cbrady at ycharts dot com or apply here: https://recruiting.paylocity.com/recruiting/jobs/Details/370...

Softmax | softmax.com | San Francisco (onsite) | Full-time

THE MOST IMPORTANT UNSOLVED PROBLEM IN AI IS THE MOST POWERFUL OF ALL CAPABILITIES: ALIGNMENT.

Hi, I'm Emmett. You may know me as the founder of Twitch (YC S05), and as the (extremely) interim CEO of OpenAI.

I believe the question of how AI systems learn to understand themselves and others is one of the most consequential technical problems of our time. If we get it right, the agents we build today will become our friends and collaborators tomorrow. And the infrastructure required to train agents that are good at working in teams and societies will be extraordinarily valuable.

Softmax is building large-scale multi-agent, multi-policy environments that will benchmark AI agents – both our own and others – on their capacity for theory of mind, adaptive goal setting, and teamwork. We’re looking for the engineers who will make that possible.

The work is unusually hard. The problems are ambiguous and challenging. High autonomy, high expectations. You'll work directly with me and the rest of our small but mighty team.

If this sounds exciting, I’m looking forward to meeting you. E

——————————————————— Hiring: Software Engineer https://softmax.com/jobs/softwareengineer Mention “HN Who’s Hiring” in the "How did you hear about this” field ———————————————————

Head of Engineering & Infrastructure | Full-Time | Remote | $182k - $272k USD - https://fetlife.com/jobs/head_of_engineering_and_infrastruct...

Role: Fully own our engineering and infrastructure teams, keep FetLife fast and reliable for over 12 million members, and free the rest of the leadership team to focus on product and growth.

How to Apply: Email jointheteam+hoei+hn@fetlife.com with a brief introduction, tell us about the impact you have personally made on an engineering or infrastructure team you have led, and LinkedIn or resume (PDF).

--- FetLife | Senior DevOps Engineer | Full-Time | Remote | 115k - 180k USD - https://fetlife.com/jobs/devops-engineer

Role: Develop and implement infrastructure upgrades, database tuning, Kubernetes and Helm orchestration, monitoring, and security. Help maintain and improve our large-scale Rails monolith, including CI/CD. Participate in on-call rotation and help automate daily DevOps tasks.

How to apply: Email jointheteam+do+hn@fetlife.com with a brief introduction, 2–3 favorite projects, GitHub/GitLab link, and LinkedIn profile or resume (PDF).

---

Stack: MySQL/PostgreSQL, ScyllaDB, Redis, ElasticSearch, Terraform, Google Cloud, DataDog and more.

Applications: Rails, Vue.js/Typescript, Rust

Perks: Paid time off (2 weeks vacation, 5 statutory holidays, 2 weeks at Christmas, 4-day summer workweeks), annual company retreat, anniversary gift ($200/year), monthly music subscription reimbursement, fully paid maternity & paternity leave.

Spiich Labs (Stockholm) | Founding Design & Frontend Engineer | Full-time | On-site | Visa Sponsorship

We're building Cursor for sales - an AI assistant doubling sales productivity by handling prospecting, CRM updates, meeting prep, and follow-ups.

Backed by founders & operators @ Lovable, OpenAI, Neo4j, Creandum. Pre-seed. Shipping fast.

What you’ll do:

- Own UI/UX of an AI sales assistant end-to-end: research, design & final code

- Develop fast, accessible, and delightful to use pixel perfect interfaces across web, mobile & desktop

- Ship fast, test ideas with users & use data to kill your darlings

Current stack: React, TypeScript, Tailwind

Comp: Competitive base + meaningful early equity (flexible structure)

Apply: hello@spiich.ai — LinkedIn, GitHub/portfolio, why Spiich, and your proudest shipped work.

http://spiich.ai

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

PostHog equips developers to build successful products by combining product analytics, feature flags, session replay, a data warehouse, CDP and many more.

* 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, incident response engineer, product managers, technical account managers and technical customer success managers.

https://posthog.com/careers

Sheer Health (https://www.sheerhealth.com) | New York, NY | Full-Time | ONSITE

If you or a loved one has ever suffered from confusing/egregious medical bills or insurance communications, this is your chance to give the power back to others in a similar situation.

Our mission is to demystify health insurance, healthcare and medical billing. By utilizing cutting-edge technology and advanced data analytics, we deliver personalized recommendations on how to save money, maximize use of plan benefits, stay on top of reimbursements and avoid erroneous or inflated medical bills.

Currently open roles:

- Software Engineer, Fullstack ($140-190k + equity)

- Software Engineer, Browser Automation ($140-190k + equity)

- Software Engineer, Backend/Data ($140-190k + equity)

- Product Manager, Data ($140-190k + equity)

- Customer and Operations Success Associate ($60-90k + equity)

- Sales/BDR (variable comp + equity)

Drop us an email to hn ~at~ sheerhealth.com if these sound interesting!

PrairieLearn (Remote US) — Full-Stack Software Engineer — TypeScript / Postgres / React / AI

PrairieLearn (https://www.prairielearn.com) is an open-source assessment platform used by universities across the US (Berkeley, Princeton, Michigan, Illinois, and others). We power mastery-based learning and large-scale exams.

We’re a small, profitable, early-stage company (bootstrapped, no VC) that is growing quickly. Our users love us and we have very high retention and rapid spread through word of mouth. As an early-stage hire, you’ll work across the stack and enjoy meaningful ownership from day one.

Tech we use: Node.js / TypeScript backend, Postgres, AWS, React. We’re also developing AI tooling, including LLM agents to help instructors create content, and vision-language models to help grade student work. PrairieLearn is open core: https://github.com/PrairieLearn/PrairieLearn

Details:

- Location: Remote (US only)

- Salary: $100k-$140k depending on experience

- Benefits: Stock options (0.5% - 1.5%), unlimited PTO, flexible hours

- Role: Full-time. (We’re not able to sponsor visas at this time.)

Apply at https://www.prairielearn.com/jobs-ashby?ashby_jid=ee6fdbc3-1...

Temporal Technologies | Multiple positions in United States - WORK FROM HOME | FULL-TIME |

Temporal offers an entirely new way to build scalable and reliable applications. Temporal enables developers to focus on writing important business logic, and not on managing state or worrying about the underlying infrastructure. Backed by top VC firms, we have built a team of professionals from various successful start-ups and well-known technology companies.

We're looking for senior level engineers for multiple roles - https://www.temporal.io/careers

FEATURED ROLES:

Staff Software Engineer - Cloud Capacity → https://grnh.se/a0hc6o6h7us

Senior Staff SWE, Cloud Proxy → https://grnh.se/5lz30bcx7us

Senior software Engineer, Front End →https://grnh.se/f0i314os7us

Staff Software Engineer, DevProd (Observability) → https://grnh.se/e2cuv6xz7us

US benefits include: Unlimited PTO, 12 Holidays + 2 Floating Holidays, 100% Premiums Coverage for Medical, Dental, and Vision, AD&D, LT & ST Disability and Life Insurance , Empower 401K Plan, Additional Perks for Learning & Development, Lifestyle Spending, In-Home Office Setup, Professional Memberships, WFH Meals, Internet Stipend and more! Benefits outside the United States vary by country.

UbiOps | Junior/Medior DevOps and Python Engineers | Hybrid Onsite (The Hague, The Netherlands) | Full-time

At UbiOps (https://ubiops.com), we make a platform to deploy AI and other workloads on any infrastructure. Our software is deployed in a broad range of environments: on premises hardware, public clouds and everything in between. We work for governments, enterprises and other critical organizations.

We are well funded and expanding, and currently looking for junior/medior engineers. Tech stack: Python, React, Kubernetes and Helm. We are currently focused on making our on-premise installations more generic and secure.

See https://ubiops.jobs.personio.com for our open positions. For the junior/medior position we offer €45.000 - € 70.000 per year depending on role and experience, alongside stock options, performance based bonuses and generous cost compensation. If you apply, mention HN in your application! :)

Beautiful.ai | Full-Time | Remote in US & CAN | SaaS B2B Presentation Software | Series B | 16M Funding | AI Industry

1. Senior Platform Engineer | 160k - 200k Base salary + Equity | https://job-boards.greenhouse.io/beautifulai/jobs/4802989007

2. Senior Software Engineer | 160k - 200k Base Salary + Equity | https://job-boards.greenhouse.io/beautifulai/jobs/4802854007

3. Software Engineer | 120k - 160k Base Salary + Equity | https://job-boards.greenhouse.io/beautifulai/jobs/4802768007

4. Staff Platform Engineer | 200k - 250k Base Salary + Equity | https://job-boards.greenhouse.io/beautifulai/jobs/4803038007

5. Staff Software Engineer | 200k - 250k Base Salary + Equity | https://job-boards.greenhouse.io/beautifulai/jobs/4802916007

6. Account Executive | 140k - 180k USD Base Salary + Uncapped On-Target Commission at 50/50 Split | https://job-boards.greenhouse.io/beautifulai/jobs/4955956007