SuppMatch | CTO | Warsaw, Poland | Hybrid + International Travel | USD 85K–102K + Equity

SuppMatch is an AI-powered supplement recommendation engine for e-commerce platforms. We integrate into online supplement retailers, pharmacies, and marketplaces to deliver ultra-personalized, science-backed recommendations in real time. Think of it as the AI intelligence layer for the global supplements market.

Stack: Python, TypeScript, React Native, Node.js, GraphQL. AI/ML: LLMs, NLP, vector databases (Pinecone/Weaviate), PyTorch, TensorFlow, Hugging Face, LangChain. Infra: AWS/GCP, Docker, Kubernetes, CI/CD. E-commerce integrations: Shopify, PrestaShop, Magento, custom.

This is a startup CTO role. You'll own the full technical vision; architecture, AI engine, data pipelines, integrations, team, while still pushing code and joining partner calls. We're live in production, in active commercial conversations across 8+ markets (Poland, Germany, UK, Italy, Austria, Czech Republic, USA), and closing a seed round.

Requirements: Polish & English fluency. Warsaw-based (hybrid). Hands-on experience with AI/ML in production. Previous CTO / VP Eng / founding technical lead at a fast-growing startup.

jacob@suppmatch.ai | https://suppmatch.ai

SuppMatch | CTO | Warsaw, Poland | Hybrid + International Travel | USD 85K–102K + Equity

SuppMatch is an AI-powered supplement recommendation engine for e-commerce platforms. We integrate into online supplement retailers, pharmacies, and marketplaces to deliver ultra-personalized, science-backed recommendations in real time. Think of it as the AI intelligence layer for the global supplements market.

Stack: Python, TypeScript, React Native, Node.js, GraphQL. AI/ML: LLMs, NLP, vector databases (Pinecone/Weaviate), PyTorch, TensorFlow, Hugging Face, LangChain. Infra: AWS/GCP, Docker, Kubernetes, CI/CD. E-commerce integrations: Shopify, PrestaShop, Magento, custom.

This is a startup CTO role. You'll own the full technical vision; architecture, AI engine, data pipelines, integrations, team, while still pushing code and joining partner calls. We're live in production, in active commercial conversations across 8+ markets (Poland, Germany, UK, Italy, Austria, Czech Republic, USA), and closing a seed round.

Requirements: Polish & English fluency. Warsaw-based (hybrid). Hands-on experience with AI/ML in production. Previous CTO / VP Eng / founding technical lead at a fast-growing startup.

jacob@suppmatch.ai | https://suppmatch.ai

Blackshark AI | Software Engineers & Platform Engineers | Full-time | Austria or Remote EU Hours | VISA sponsorship available

We build geospatial AI infrastructure. Our platform lets analysts train custom object and change detection models on satellite/aerial/drone imagery in minutes, then reconstructs 3D terrain from those detections. We just shipped a planetary-scale simulation platform with Lockheed Martin powered by Unreal Engine.

If you want to work on distributed systems that run in a data center one day and an edge laptop the next, we have interesting problems. Our training and inference infrastructure is processing trillions of pixels and we deliver real world impact for our customers across defense, intelligence, and local governments.

Tech Stack: Python, Fast API, PyTorch, Postgres, Redis, Vue.js

Infrastructure Stack: Kubernetes & Docker, Linux, AWS & Azure, Azure DevOps, Terraform, ELK, Prometheus & Grafana, ArgoCD & Helm

Roles:

Software Engineer - Frontend UI https://jobs.eu.lever.co/blackshark/5c596b85-5134-4601-be25-...

Software Engineer - Data Plane Team: https://jobs.eu.lever.co/blackshark/6110fedd-5cd8-40e5-ac11-...

Software Engineer - Machine Learning Team: https://jobs.eu.lever.co/blackshark/7c4b0833-790b-4490-b24a-...

Platform Engineer - Deployment Team: https://jobs.eu.lever.co/blackshark/56a85834-d986-4105-9cc8-...

or reach out to HM with questions at: 'eivanov@' + username[:-2] + '.' + username[-2:].lower()

We're building AI that predicts whether a wounded soldier survives — before they reach a hospital.

LIFEGUARD Technologies is hiring an ML Research Engineer to build a multimodal CNN-LSTM wound trajectory engine from scratch, on unique real-world conflict wound data — video and clinical time-series — that exists nowhere else.

This is a government-funded programme with a clear 28-month roadmap, taking the system from proof-of-concept to a field-demonstrated prototype operating offline on hardware. You will own the technical core end to end — multimodal architecture design, XAI integration, edge deployment, federated learning across geographically separated data nodes, and regulatory documentation to UK standards.

The work is hard. The scope is real. The data is irreplaceable. You may see the front line.

For the right engineer, there is also a broader opportunity across a portfolio of health and med-tech ventures — building AI that saves lives across oncology, defence medicine, and emergency care.

What we're looking for: proven CNN and LSTM / Transformer experience on clinical or scientific time-series; multimodal fusion experience (image + structured data) a strong advantage; hands-on PyTorch, ONNX Runtime, and XAI (SHAP/LIME/Captum); ability to work directly with clinicians. PhD or MSc preferred. UK SC clearance eligibility preferred but not a requirement.|

£70,000 – £85,000 base. 0.5%–1.0% EMI equity. Remote/hybrid UK.

Email cbdo@rasalingham.com with your CV and two or three sentences on your most relevant multimodal or temporal modelling work.

ML6 | Machine Learning Engineer, Data Engineer | Python, TensorFlow, PyTorch, GCP, AWS, Azure | Full-time | Amsterdam, Berlin, Munich, Eindhoven, Ghent (EU) On-site/hybrid

We are a Machine Learning consulting company that builds end-to-end Machine Learning solutions. By applying the latest AI research, we keep our clients at the forefront of innovation. If you are interested check out: https://www.ml6.eu/knowledge-hub/blog and https://www.ml6.eu/customers/cases

Work on innovative projects for the biggest clients across Europe such as Randstad, ASML, FUNKE, and many more! Whether it’s about leveraging LLMs to improve customer support, building data lakes on cloud platforms to improve storage or implementing models using sensor data for quality control. You can find it all at ML6. You will mostly work with Python and a range of ML frameworks such as TensorFlow, PyTorch, or HuggingFace Transformers to solve hard Machine Learning tasks and help bring these application into production by building data pipelines and cloud infrastructure on all of the major cloud providers (GCP, AWS, Azure).

Open roles include:

• Senior/medior AI Engineer

• Senior AI Project Manager

• Chief Product Owner

and many more!

Apply now at the https://jobs.ml6.eu/

Innolitics | Medical Device Engineers + Physician-Scientist (MD/PhD) | REMOTE (US) | Full-Time

Innolitics builds AI/ML software for medical devices — the kind that detects ear infections, tracks metastatic cancer, and plans radiation therapy. 60+ FDA clearances. We need engineers who want their work to matter. We're a remote-only firm (since 2012) that does engineering, regulatory, and cybersecurity under one roof. Our team includes MDs, PhDs, and software engineers. Clients range from Series A startups to large device companies. We're hiring for three roles:

1. Physician-Scientist (MD/PhD) — Biostatistics & AI Software Development MD + PhD in biostatistics, bioinformatics, epidemiology, or a related quantitative field. You'll design biostatistical plans for AI validation studies (MRMC, standalone, prospective), build production-grade statistical software and data pipelines, write FDA-facing statistical sections, and analyze large clinical imaging datasets. Fluent in Python and/or R. This is not a pure research role — you'll ship code that gets FDA-cleared and deployed in clinics.

2. Senior Web/Mobile Medical Device Engineer 5+ years SWE experience. 3+ years each in web and mobile. Fluent in TypeScript and Python. You'll build medical device software and produce FDA-facing technical documentation. Cross-functional role bridging engineering and regulatory teams.

3. Medical Device Software Engineer 3+ years SWE experience. Fluent in Python, C++, or TypeScript. Heavier emphasis on software development initially; you'll grow into regulatory documentation work over time. All roles involve writing production code for medical devices, authoring documentation for FDA submissions, and working directly with clients. No prior medical device experience required — we'll teach you. Why engineers stay here:

Agentic AI tools (Claude Code, etc.) are part of our workflow. We treat them as a impact multiplier, not a threat. ~1 hour of meetings/week for ICs. Flexible hours. 2 hours every Wednesday dedicated to learning ("10x Time"). Healthcare-only revenue. No debt. Never had a layoff. We pay $300 for take-home exercises because your time has value.

Stack: Python, TypeScript, C++, R, Django, React, TensorFlow, PyTorch, scikit-learn, Qt, Terraform.

Apply: https://innolitics.com/careers/

How we work (we publish our handbook): https://innolitics.com/about/handbook/

LiveEO | Senior ML Engineer | Berlin, Germany | Hybrid | Full-time

LiveEO leverages high-resolution satellite imagery and AI to provide actionable insights across industries—like protecting power grids, monitoring critical infrastructure, and ensuring deforestation compliance.

We are looking for a Senior ML Engineer to build and scale multitemporal, multimodal computer vision models for Earth observation. You’ll combine optical and Synthetic Aperture Radar (SAR) data into robust representations. This role is a true balance of applied research and engineering: you’ll own the full ML R&D lifecycle from data standardization and SOTA model development to rigorous evaluation and production-grade delivery.

Tech Stack: Python, PyTorch/Lightning, Databricks, MLflow, Ray, Prefect, AWS, Geospatial stack (GDAL, Rasterio, GeoPandas, STAC), PostgreSQL.

What we're looking for:

* Strong Python engineering and deep PyTorch/Lightning experience.

* Proven experience implementing and training deep learning models at scale.

* Hands-on experience with satellite imagery (optical & SAR strongly preferred).

* Strong CV fundamentals (representation learning, supervision, evaluation) and ML experimentation (Databricks/MLflow).

* Pragmatic mindset: you can take SOTA papers to validated baselines and production under real-world constraints.

Must be living in or willing to relocate to Berlin. This role requires German/European citizenship due to legal/regulatory requirements.

(Bonus points for experience with large-scale geospatial foundation models, VLMs, or distributed compute with Ray).

Apply here: https://liveeo-gmbh.jobs.personio.de/job/2540514

Senior Machine Learning Engineer – LLM & Reinforcement Learning (m/f/d) €160.000+ | Full-Time | ONSITE

As a Senior Machine Learning Engineer at warmwind your work will drive our next-gen AI models, shaping the future of machine intelligence beyond traditional paradigms. You'll work with massive compute clusters (500+ H100 GPUs) and cutting-edge reinforcement learning techniques to create highly efficient, scalable, and groundbreaking AI systems.

Responsibilities: Design, train, and optimize Large Language Models (LLMs) from scratch Scale distributed training on massive GPU clusters (500+ H100 GPUs) Implement advanced reinforcement learning techniques (RLHF, adversarial self-play, real-time control) Develop high-performance architectures for multi-modal AI systems Build simulation environments for RL-based AI agents Optimize inference speed and efficiency for real-world deployment

Your Profile: Deep expertise in LLMs – you’ve built and trained large-scale models yourself Experience with large-scale distributed training on 500+ GPU superclusters Deep understanding of reinforcement learning, neural network optimization, and self-play methods Expert in PyTorch, TensorFlow, JAX & low-level optimization techniques (CUDA, Triton, DeepSpeed, etc.) Familiarity with high-performance computing (HPC, NVLink, InfiniBand, parallel computing) Strong publication track record in AI/ML research is a plus Relocation to Jena, Germany after initial onboarding

Language requirements: German or English

https://warmwind.com/careers/senior-machine-learning-enginee...

Immunera | Principal Machine Learning Engineer | NYC area (hybrid) | Full-time | immunera.ai

Hey! I’m Maxim, cofounder/CEO of Immunera.

We're building blood tests that use gene sequencing and machine learning to help patients with autoimmune disease. Immunera spun out of years of research at Stanford, and our technology has been published in Science and covered by The New York Times.

We're hiring a Principal Machine Learning Engineer to shape the core models and infrastructure that power our blood tests. We are partnering with hospitals to generate training data from real patients for our language models and other biological sequence models.

This is a senior engineering role with significant autonomy at an early-stage, venture-backed startup. We're looking for strong experience building and operating ML systems in production (Python, PyTorch/TensorFlow, cloud platforms). Prior biology or healthcare experience is NOT required; we care much more about your ability to reason about data, models, and systems.

Full JD: https://www.immunera.ai/jobs

Contact: maxim@immunera.ai (subject: “HN ML job”)

Blueberry Pediatrics | Full-stack Senior or Staff Engineer | REMOTE (US only)

American healthcare is seldom affordable, accessible, or high-quality. We are fixing this for pediatrics. Blueberry is the most affordable option amongst our competitors. We practice the highest quality pediatric telemedicine, as evidenced by our exclusive hiring of board-certified pediatricians and the usage of at-home medical kits. And, we’re accessible 24 hours a day.

Our success is shown in the lives we save, the costs we save our insurers, and our exploding B2B and D2C business.

As you can imagine, pulling off affordable high-quality healthcare is a challenge. It requires a lot of engineering ingenuity, a C-suite aligned with positive patient outcomes above short-term profits, and a great product team.

We use Django, Hotwire Turbo (an HTMX-like framework), Pytorch, Sklearn, and Flutter. Experience in these technologies helps, but what’s more important is general full-stack knowledge, curiosity, and a strong work ethic.

Full-stack engineer: https://jobs.ashbyhq.com/blueberrypediatrics/dc8108f3-34ed-4...

Our homepage: https://blueberrypediatrics.com/

Our engineering blog: https://engineering.blueberrypediatrics.blog/

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

We're hiring:

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

Apply at https://jobs.ashbyhq.com/river?utm_source=Zp9nJyqvd4 or email me at alex@river.com and mention HN.