legacy-use.com | Co-Founder | Munich, Germany | Remote possible | Full-Time |

Most legacy software has no API and cannot be automated with Agentic AI. At our company builder (schub.tech) we had the same problem in one of our ventures and build ourselves a solution: based on computer-use, we can insert & extract information out of any software.

We believe this toolstack is useful to many others, hence we spin it out as a company. We are looking for co-founders to join us on the journey to open up backbone of German Mittelstand to AI automation.

See here my post announcing the role: https://www.linkedin.com/posts/schuon_co-founders-wanted-for...? Apply via Email is hidden

Cheers, Sebastian (Founder of Schub)

Queueco | HFT | London, UK | Full time on-site | Visa sponsor

We are a proprietary trading firm operating in conventional as well as cutting-edge alternative markets. Our strategies run 24/7 without manual intervention powered by low-latency infrastructure and the latest machine learning techniques. We're a meritocratic and lean team of highly-motivated scientists and developers and as such value technical ability more than politics: what matters is how good your code is, not how well you sell yourself. We spend no time dealing with clients, customers or investors and instead focus on growing our business by building better technology.

---

If you are a talented developer who likes to work on low latency systems please get in touch. We are also happy to sponsor exceptional talent.

You will be part of a small but growing development team that shares the responsibility of the whole trading stack. As you own the code, deployment and all tooling, you can rapidly and safely iterate on changes to the trading software. As a result we deploy many times a day.

Developers collaborate directly with traders and researchers, allowing for immediate reaction to market changes and fast iteration of live trading engines

Send us a message at:

Email is hidden

or apply directly at:

https://apply.workable.com/queueco/j/6926a83dee/

OneTake AI (https://www.onetake.ai/) | Full Stack Senior Engineer (React + Node + AI experience) | Fully Remote (CET hours) | Full-time | €80,000–100,000

Hi there, I’m one of the founding members of a remote AI startup that’s reimagining video editing with cutting-edge LLM technology. We’re small, friendly, and flat in structure, and we place a high value on autonomy, initiative, and embracing complex challenges (instead of waiting for step-by-step instructions).

Our stack: React (front-end), Node.js (API backend), Docker & Kubernetes for deployments, AI/LLM APIs (OpenAI, Claude, Llama, etc.)

We’re looking for: - At least 7 years of software engineering experience (3+ in a senior/lead capacity) - Ability to work seamlessly across the full stack (complex UI + efficient backend) - Comfort shipping production-ready features continuously * Good understanding of testing methodologies (unit, integration, e2e) - Excellent communication for async work and collaborative problem-solving

Nice to have: - Video/video-editing product background - Training & deploying LLMs or AI models - C++/OpenGL/FFmpeg experience - Startup experience

What we offer: - Full-time remote role - Annual salary €80,000–100,000 - Fully remote from Europe/EMEA timezone | Flexible hours - Potential in-person team gatherings in warm, pleasant locations

More info / Apply: Email is hidden

Cortical Labs | Senior Python Engineer | ONSITE Melbourne (Brunswick), Australia

Cortical Labs is pioneering the next generation of biological computers by integrating lab-grown neurons with silicon chips.

- Developing low-latency applications that integrate with biological neural networks

- Managing and improving a codebase

- Mentoring junior engineers

More details at https://www.linkedin.com/jobs/view/senior-software-engineer-...

Apply: Email is hidden

Voltquant(https://www.voltquant.com/) is building an AI-powered platform for engineering firms, utilities, and infrastructure companies. We help teams process technical data more efficiently, automate complex workflows, and make informed decisions using AI.

We’re seeking engineers who want to build real-world AI tools that address industry challenges—working with data from large-scale infrastructure to ML-powered document intelligence.

Tech Stack: JavaScript | Next.js | Node.js | TypeScript | Azure

Open Roles: • Full-Stack Engineer (Hybrid, London) • (x2) Back End Engineer (Hybrid, London) • AI Product Manager (Hybrid, London)

Interested in applying AI to built-world challenges? Email jobs at voltquant dot com with your CV and two examples of projects you’re most proud of.

Intuition Machines, Inc. | Multiple Roles | REMOTE - WORLDWIDE

Want to build ML models that impact hundreds of millions of users daily, running on systems that handle millions of requests per second? Excited by the challenge of deploying models under strict memory and compute constraints - all while adapting to continuous adversarial drifts?

Intuition Machines, the team behind hCaptcha, is hiring an experienced ML Applied Scientist (5+ years) to design and scale models, mentor engineers, and translate business needs into technical solutions. You’ll work in a low-overhead environment with small, distributed teams that prioritize rapid iteration and shipping early.

If you have strong experience in real-time ML, online learning, and the full modeling lifecycle, come help us build the security infrastructure that keeps the internet safe.

Details: https://apply.workable.com/imachines/j/912cc62559/

We're also hiring for:

Lead ML Engineer - https://apply.workable.com/imachines/j/3b70672c1a/

Senior Data Engineer - https://apply.workable.com/imachines/j/d31d65bf69/

SREs – https://apply.workable.com/imachines/j/cd0057c4cc/

Senior Backend Engineers – https://apply.workable.com/imachines/j/2de5642c7e/

Senior Frontend Engineers – https://apply.workable.com/imachines/j/2eecc9d13d/

See all open roles: https://apply.workable.com/imachines/

Join us and build something impactful!

Castle (https://castle.io) | Senior ML Engineer | Senior R&D Detection Engineer | REMOTE (Europe/EMEA) | Full-time

Hi HN! I’m Antoine, Head of Research at Castle. We’re a YC-backed Series A startup helping companies like Canva, Atlassian, and Rockstar Games fight fraud and abuse. We're building modern, AI-powered bot detection and abuse prevention tech, with a focus on real-time protection and behavioral intelligence. We’re a small, fast-moving team looking to add two technical roles:

Senior ML Engineer – Fraud & Bot Detection You'll work on real-time ML pipelines, anomaly detection, and adversarial ML techniques to stop bots and malicious actors. We’re combining traditional fraud signals with modern AI—LLMs, behavioral clustering, and vector-based search—to stay ahead of attackers. You’ll own models end to end and deploy quickly, with direct access to rich, structured behavioral and fingerprinting data. Ideal for someone with strong experience in the anti-fraud/anti-bot field who loves cutting-edge ML and wants immediate impact.

Senior Detection Engine Engineer (R&D) You’ll build and scale the core infrastructure behind our detection logic—rule engines, fingerprinting pipelines, and high-speed signal ingestion. We’re integrating AI-driven detection and auto-adaptive logic that reacts in real time. If you enjoy real-time systems, security, and automation, this is a highly technical role that’s at the core of our detection stack. Perfect if you’ve worked in security, data pipelines, or real-time analytics and want to outsmart fraudsters.

We pay US salaries globally | Fully remote from Europe/EMEA timezone | Flexible hours | Unlimited PTO | Paid parental leave We're actively hiring and committed to responding to every qualified applicant.

Drop us a line: Email is hidden

[flagged]

V7 Labs - https://www.v7labs.com/careers We're actively hiring for our London HQ (hybrid roles), remotely across Europe and building our New York office as well.

What we do: V7 Go: Automate workflows with AI agents. V7 Darwin: Label data at scale to build custom AI

We're looking for FS, FE and BE Engineers, AI Solution Engineers and AI Product Engineers as a priority. Also various GTM roles live!

Please apply via our website and mention HN during your application!

Don't bother applying to this one, as it's a ghost job posting (you can check for yourself in previous Who is Hiring posts dating all the way back to 2023)