x2A | NYC, NY, USA | ONSITE | https://x2a.tech

We are actively looking for multiple software developers or software engineers to join our team (in the office, 5 days/week). These positions primarily focus on our 5off software product (puzzles/games).

There is zero expectation for you to be proficient in all aspects of the tech stack. We are looking for people who know some of these technologies and are excited to share their expertise while developing their skills and learning new things.

We welcome candidates at any experience level, with or without academic qualifications. For junior candidates, do not hesitate to share related personal projects.

Tech stack:

- Languages: Python, Typescript, Swift, Rust, C++. - Backend: SQLAlchemy, PostgreSQL, Litestar. - Frontend: Svelte, Tailwind. - Mobile: Swift, SwiftUI. - Cloud: AWS, AWS CDK. - DevOps: Gitlab. Compensation: 115k-170k based on experience and skills.

More https://x2a.tech/careers/openings/ for more details and how to apply.

EnsoData | Mobile Engineer (React Native/Typescript) | Full-time | Hybrid (Madison, WI) or Remote (US)

EnsoData strives to make healthcare more accurate, efficient, and affordable through waveform artificial intelligence (AI) technology. Using AI and machine learning, our software analyzes billions of data points collected from sensors placed throughout the human body.

We are seeking a mobile engineer who is passionate about making healthcare better and has experience building React Native Typescript apps.

Looking for 5+ years full time experience working with a team building React Native Typescript apps for iOS and Android.

Actively hiring - please apply at https://apply.workable.com/ensodata/j/8e07e794df/ - we would love to hear from you!

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Microsoft AI | Platform Engineering | Full-time | Seattle, WA or San Francisco Bay Area | ONSITE (4 days/week)

We're building the platform primitives that power https://copilot.com (Microsoft's ChatGPT). If you've shipped systems at scale—whether backend services, distributed infrastructure, ML platforms, or consumer AI products—we want to talk to you.

The work: design and build secure, performant platform services for AI at scale; collaborate with infrastructure, product, design, and research teams; ship high-quality code that reaches hundreds of millions of users; move fast in a design-driven environment.

You: solid fundamentals in systems thinking and software engineering; fluent in Python, C#, C++, Java, JavaScript, or similar; shipped real products or systems people use; can communicate across technical and non-technical teams.

Compensation: Competitive with other frontier AI companies, commensurate with experience

We're actively hiring and will respond to applicants. Check https://microsoft.ai/careers for current openings, or email Email is hidden if something specific doesn't fit the bill. Apply directly if genuinely interested in building the future of AI.

control-f | Data Engineer (pyspark, databricks) | Full-Time | Remote (GER)

Wir bei control-f sind echte Daten-Nerds und bauen Big Data Plattformen für Telemetriedaten in der Industrie. Wir suchen jemanden, der Lust hat, mit uns gemeinsam aus Daten-Chaos smarte Lösungen zu machen. Wenn du Spaß daran hast, mit PySpark und Databricks richtig große Datenmengen zu bewegen und dabei technische Herausforderungen nicht scheust, dann bist du bei uns goldrichtig.

https://www.controlf.io/jobs-1/data-engineer-(m%2Fw%2Fd)

Onja | Full Stack Developer, Course Design & Back-End Developer, Course Design | Full-Time | ONSITE - Madagascar

Looking to join a social-impact driven company? Are you a software developer ready to use your skills for good? Onja trains underprivileged youth into world-class software developers. We are on the lookout for Course Designers who can help our students go from ‘what is coding’ to working in Global tech teams.

Help build a scalable course that will help train Madagascar’s brightest young people, while working alongside a team of talented, fun colleagues from all over Madagascar and the world.

Please apply through the following links: Full Stack Developer, Course Design: https://onja.org/careers/full-stack-developer-course-design

Back-End Developer, Course Design: https://onja.org/careers/back-end-developer-course-design

Pepr AI | pepr.ai | Onsite in San Francisco | Full-time | Multiple roles | $140-$270K based on role/experience | Visa Sponsorship | Relocation

We are building the AI Operator for growth to replace traditional ad agencies. We apply quant rigor of high-frequency trading to optimize ad spend, delivering 20-50% upside in spend efficiency. We manage spend for global category leaders like Cider and Cupshe with a clear path to managing billions of dollars. We are backed by Quiet Capital and are hiring for multiple engineering roles: - Member of Technical Staff, Full Stack - https://pepr.ai/careers?ashby_jid=6025c6f4-3b72-4dc6-8a2c-fa... - Member of Technical Staff, Machine Learning & Optimization - https://pepr.ai/careers?ashby_jid=baf0e7ac-164f-4f1d-9938-de... - Member of Technical Staff, Product (ML) - https://pepr.ai/careers?ashby_jid=e6d130a7-29c0-420d-b954-ba...

Please write to us at Email is hidden

Shaswat, co-founder & CEO

Rad AI | Infra / Platform / ML Infra / SWE | San Francisco, CA | ONSITE/HYBRID Preferred, Remote Available | Full-time

Rad AI builds AI products used by thousands of radiologists, helping reduce burnout and catch more disease across a large share of US medical imaging. We’ve raised $140M+ and are expanding our San Francisco presence with a new office at 2nd + Market, and we’re especially looking for infrastructure engineers who want to work in-person in SF.

Work areas: Infra / Platform: AWS, Kubernetes, Terraform, PostgreSQL, observability, secure/HIPAA production infra

ML infra / MLOps: Python, PyTorch, Airflow/LangGraph, data/feature pipelines, model serving

More about current roles and to apply: https://www.radai.com/careers?utm_source=w29wy29rlj

Blue | 2x Founding Engineers + EA | Remote | Full-time | https://joinblueai.com/join-us

1x Backend/Infra Engineer + 1x Mobile/iOS Engineer + 1x SuperAdmin/EA

Now that we're closing a new big round, we're hiring. Small elite team or bust. Existing team includes: post-exit robotics founder + PhD AI/robotics + cracked fullstack webdev.

If you know anyone awesome, see our referral bounty at bottom. I'm all ears!

Blue is a complete operating system for your personal health and longevity. Integrate all your health data & records into one place. Share access with any doctor. When a doctor logs in, it morphs into a fullstack next-gen EHR. You, and only you, own and control all your data. We envision a WAY better healthcare system.

More details: https://joinblueai.com/join-us

Apply via email to Email is hidden (include resume/CV, LinkedIn/GitHub + quick blurb on 1–2 systems you’ve owned end-to-end that are most similar to Blue in some way) and mention this HN post.

Bounty: $500 for each referral that makes it to our final interview. If we hire them and they make it past 6mo, $5000 + dinner for the 3 of us @ a Michelin-starred restaurant + free lifetime access to Blue.

DoStuff | Retention Product Engineer (Full-Stack) | Austin or Remote (US time zones) | Contract to hire preferred

I’m Scott - founder of DoStuff. We have a pretty big, and growing, membership product called DoMORE - $7/month for a pair of tickets to an event we think you’ll like. We’re hiring a hands-on Retention Product Engineer to own engagement → churn reduction end-to-end.

You will analyze cohorts, define the retention north-star metric, ship product and lifecycle experiments yourself, and measure impact.

This is not a PM-only role and not a pure engineering role. You own the full loop: insight → build → measure → iterate.

Our stack: React (FE), Ruby on Rails + Elixir (BE), Postgres, Elasticsearch. Proprietary lifecycle tooling for email, SMS, and in-app (web). No feature-flagging or experimentation framework yet - you’ll help install the remaining plumbing.

Retention is the highest-impact opportunity in the business and this role has real authority to ship.

If you have experience with the above and this sounds like fun, reach out to Email is hidden with something in the subject line that let’s me know you’re real and interested. THX