AREO | Remote (EU) and On-Site in Bremen, Germany | Full-Time | Equity | Roles: Engineering Manager (Ruby on Rails), Robotics Engineer

My name is Marius, and I am the CTO at AREO (https://goareo.com/)

AREO, founded in January 2023 by a team with 20+ years of combined experience in retail and startups, is a young startup specializing in developing innovative solutions for supermarkets and grocery stores.

Our B2B SaaS platform optimizes employee workflows by providing real-time access to inventory, product information, and customer inquiries. We serve large supermarket chains in Germany and across the EU.

We have already hired two backend developers through "HN - Who is hiring?" and are now seeking an Engineering Manager (Ruby on Rails) with at least 8 years of experience (preferably in startups). We recently signed another large contract with a major retail chain, are growing quickly, and expect to close a pre-seed funding round in the next few days.

For the Engineering Manager role, professional proficiency in German is required, and you must be based in the EU.

Backend Stack: Ruby / Rails (8.x), StimulusJS / Hotwire / Turbo, AlpineJS, Postgres, Docker, DigitalOcean, OpenAPI, LLMs

We are also seeking a Robotics Engineer to work from our robotics lab in Bremen, Germany. We are building a retail robot, initially focusing on teleoperation and later on developing autonomous models. You should have at least 2 years of experience with humanoid robots, VLAs, teleoperation, and other relevant robotics systems. Professional proficiency in German is required, and you must live in Bremen or be willing to relocate.

Perks: Fully remote setup within Europe for the Engineering Manager, sizeable equity in a rapidly growing company, flat hierarchies, a no-ego work environment, and the opportunity to work in a lean but highly experienced team.

Apply here: marius[at]goareo.com and mention "HN - Who is hiring?" and the role you're applying for in the subject line.

Stealth | Dallas, TX | Onsite

Software engineer. Insurance space.

ping me @ shayneosull@gmail.com

Marker Learning | Senior Full-Stack Engineer (Frontend-Leaning) | Full-time | Remote, US only | $180k–$200k | https://www.markerlearning.com

We’re building the Marker Method, a digital assessment platform that helps clinicians understand how students learn. It brings together interactive assessments, automated scoring, and tools for interpreting results. Our norming study is underway, and we’re building toward launch.

We’re looking for a frontend-leaning full-stack engineer to join our small engineering team. You’ll build student-facing assessment experiences and clinician tools, with ownership across the frontend and the systems behind it.

Strong TypeScript, React, and Next.js experience is especially relevant. We care about product judgment, thoughtful UI, and the ability to take an ambiguous problem through to working software. You should be comfortable working independently, making sensible technical decisions, and writing code every day.

If you enjoy getting the details right on software that students and clinicians actually use, we’d love to talk.

Apply: [careers@markerlearning.com] with a résumé or LinkedIn profile and a little about something you’ve built.

Proofline | Founding Staff / Principal Engineer | REMOTE (Worldwide, Berlin timezone overlap preferred) | Full-time | €120k-€200k + equity | https://proofline.sh/careers/founding-staff-principal-engine...

Hi HN, I'm the founder of Proofline. We're building an infrastructure-aware AI code reviewer that catches deployment failures before they reach production. Think of it as a type checker for your cloud infrastructure. We analyze code changes against Terraform, live cloud environments, and deployment evidence rather than just reading diffs.

We're hiring a hands-on Staff / Principal Engineer to help us build. You'll own core SaaS architecture, cloud integrations, developer tools, and product delivery, with a path toward engineering leadership.

Stack: Rust, Go, PostgreSQL, React/TypeScript, Terraform, AWS, GCP.

We're looking for someone with 10+ years of hands-on infrastructure engineering experience, deep SaaS and cloud expertise, extensive use of AI coding agents, and a track record of shipping end to end.

Remote globally, flexible hours, regular Berlin visits required. Salary: €120k-€200k depending on experience and location, plus meaningful founding equity. No visa sponsorship.

To apply, ship a small feature PR to one of our open-source developer tools and email careers@proofline.sh with the link. If you have 10+ years of relevant experience and an established online presence showcasing your technical work, you can skip the PR and share your best work with us instead.

Details: https://proofline.sh/careers/founding-staff-principal-engine...

Lobox Recruiter brings recruitment and professional networking together in one ecosystem. A new way to discover professionals, build connections and explore hiring opportunities. Worth checking out! https://lobox.com/articles/66

Enclave | Technical Content & Community Lead | REMOTE (UK) | Full-time | £70k + share options

Enclave is a Zero Trust Network Access platform built specifically for MSPs. We're hiring our first dedicated GTM person to help us become better known and understood among MSP engineers and technical leaders.

It's a hands-on role spanning technical content, community participation, partner enablement, demos, and improving how Enclave shows up across the web, search and AI.

We're looking for someone with strong networking/infrastructure knowledge and experience of the MSP world.

More information/to apply: https://enclave.io/careers/technical-content-community-lead/

PlantingSpace | Full-time | Remote (EU time zone) + Quarterly Meet-ups | https://planting.space

We're building a system that represents domain knowledge as modular probabilistic models — making analysis rigorous and transparent. Users can connect these models flexibly into larger structures. The system enforces consistency across them, and propagates uncertainty through each step. Our first applications are in finance and scientific research, with use cases ranging from equity valuation and distress monitoring, to particle physics.

We're hiring for the following openings:

* Technical Project Manager

* Backend Software Engineer

* Analytic Learning Algorithm Researcher

* Product Managers and Business Development

* Domain Experts - Valuation, Quantitative Default-Probability, or Interest Rate Prediction Models: to collaborate on use cases, from opportunity validation through production

Find out more, and apply at: https://planting.space/joinus/

Location: Dorset, UK

Remote: Yes (UK, US and EU time zones)

Willing to relocate: No

Technologies: Ruby on Rails, Python (FastAPI), TypeScript/Node, Go, PostgreSQL, AWS, Hotwire

Résumé/CV: https://wagnermatos.co.uk

Email: wm@wagnermatos.co.uk

Senior engineer, 15 years. I build complete products on a fixed scope and fixed price: one senior engineer accountable end to end, AI-accelerated. Recent work includes a clinical alerting platform used by NHS trusts, an edge-to-cloud analytics platform for Johnson & Johnson Medical, and the cloud platform behind a fielded detection-hardware fleet. Also open to contract engagements (Rails). Case studies and client testimonials on the site.

OpenRent | London, UK | Full-Time | ONSITE+PART REMOTE | https://www.openrent.co.uk

What sucked the last time you rented a house or flat? Come and fix it. OpenRent is force for good in an industry tarnished by rip-off agencies and one of the biggest UK websites by traffic. Enabled by an unrelenting focus on technology, we let more properties than any agency in the UK. In the last 12m we let over £50 billion worth of property, to over 8 million registered users, without ever charging any admin fees.

You'll be working on solving every aspect of the rental journey, from models to predict the right price of a property, to building the future of property management, all to help tenants find their dream home, and landlords their ideal tenant.

We're PE backed, profitable, and have plenty of ambition to maintain our fast growth in this absolutely massive market.

Roles currently available:

- Senior Full-Stack Engineer | 110k+ (based on experience) + quarterly bonus

All roles visible here: https://www.openrent.co.uk/jobs

Encube | ML Engineer, ML Ops Engineer | Stockholm, Sweden | ONSITE | Full-time

Encube is a platform where hardware teams look at their 3D designs and engineering drawings together and make better products faster. We're building AI that understands those drawings and 3D models, and can eventually create them. Evaluations are a massive priority, and we need to consistently demonstrate how our models are better than frontier VLMs.

ML Engineer: train models that connect 2D drawings to 3D models, build agents that generate CAD and drawings, figure out how to measure if they're actually good, and ship them to real customers. PyTorch. Bonus if you've worked with 3D, CAD or graph neural nets.

ML Ops Engineer: on-prem and AWS GPUs, make every experiment reproducible, keep costs down and customer data safe, and get rid of whatever slows the ML team down. SkyPilot, MLflow, PyTorch.

Perry | Founding Commercial Hire, Founding Account Executive (US), Product Designer, Legal Engineer | London (and New York for US AE) | ONSITE | Full-time

Perry is the legal OS for private capital. We build AI agents that turn a fund's legal documents into operational intelligence: reviewing term sheets and SPAs against the fund's own playbook, tracking rights and obligations across portfolio companies, and flagging MFN and regulatory risk. Founded by fund lawyers, backed by Antler, with paying VC and PE fund customers. New office near Euston.

Founding Commercial Hire (London): our first commercial hire. Own revenue, close a warm pipeline of UK and European funds, and build the sales playbook.

Founding Account Executive, US (New York): our first person in the US. Turn conversations with US funds into pilots and contracts.

Product Designer (London): define how fund GCs review and trust agentic AI output. 2+ years shipping B2B product, strong Figma, front-end skills a plus.

More details on https://useperry.com/career/

UNICEF - REMOTE backend dev - Digital Inclusion Division, Connectivity Credits

We're building a marketplace where local ISPs connect schools and health centers to the internet, prove it via telemetry, and get access to discounted backhaul, IP transit and compute from large infracos.

Currently in pilots in Mexico, Kenya, South Africa, Malawi.

Looking for 1 dev to join a small tech team (3 people) working on this protocol and marketplace, which sits on top of a larger tech team of 30 people at UNICEF Digital Inclusion. Not your typical UN job or culture.

https://jobs.unicef.org/en-us/job/596538/consultancy-connect...

The rest of the team are in Barcelona/Geneva, but this role is remote. 6 month contract to start, with the aim to continue long term.

DigitalTolk is hiring for remote positions across Pakistan, India and Philippines. Right now, we are looking for Senior Software Engineering Manager. Full Job description and to apply at https://talent.digitaltolk.com/candidate/jobs/senior-softwar...

telli (YF F24) - customer-facing agents - is hiring in Berlin (Eng, GTM, Design) - https://www.telli.com/careers

Scento | Paris, Berlin | REMOTE (EU) or ONSITE | Full-time | https://www.scento.com/careers

Scento is Europe's largest perfume decant website: more than 1,000 original designer and niche perfumes as 2 ml, 5 ml and 8 ml decants, shipped to 26 EU countries. Founded in 2024, headquartered in Paris with a second office in Berlin. We build our own stack on Next.js and Medusa.

Open roles (gross per year, plus annual performance bonus):

- Staff Full-Stack Engineer (Next.js, Medusa), €140k–€185k: https://www.scento.com/careers/staff-full-stack-engineer - Head of Data & Analytics, €135k–€175k: https://www.scento.com/careers/head-of-data-analytics - Senior E-commerce Product Manager, €110k–€145k: https://www.scento.com/careers/senior-ecommerce-product-mana... - VP Growth Europe, €190k–€250k: https://www.scento.com/careers/vp-growth-europe - Head of SEO & AI Search, €125k–€160k: https://www.scento.com/careers/head-of-seo-ai-search - Head of CRM & Lifecycle, €115k–€150k: https://www.scento.com/careers/head-of-crm-lifecycle

All roles: https://www.scento.com/careers. Apply by email to careers@scento.com with the role title in the subject line.

Modash.io | Senior Product Engineer | Remote (Europe) | Full-time | €80k–110k | https://modash.io

Modash helps brands find, manage, and pay creators - and helps creators earn a living.

The product looks simple on the surface. Underneath, we index 380M+ public creator profiles across Instagram, TikTok, and YouTube so that 2,700+ brands search, evaluate, manage, and pay creators without drowning in spreadsheets and tabs.

We're looking for Senior Product Engineers who like owning ambiguous problems end-to-end. No perfectly shaped tickets. You talk to customers, understand messy workflows, make product decisions, ship, and own whether it actually works.

The problems we care about: - How do you make a 380M-profile dataset feel fast, trustworthy, and easy to explore? - How do you turn chaotic influencer marketing workflows into product that feels obvious? - How do you build tools that work for both small teams and brands like Stanley, Sennheiser, Birkenstock, and NordVPN??

We're around 90 people, raised an €11M Series A, and ARR is doubling every year. HQ is in Tallinn, engineering is fully remote across Europe. No ticket factory. No seven layers of approval. Small teams, real ownership, hard product problems.

Engineering blog: https://modash.io/engineering Apply: https://apply.workable.com/modash/j/C1507B65C3

psfleet | AI Engineer (Agentic / GenAI) | REMOTE (Europe & nearby time zones) | Full-time

Remote-first cloud & AI services company (founded 2015, 70+ engineers, AWS Advanced & Google Cloud Partner) with a growing GenAI practice and several active client projects.

You'll build production AI agents and multi-agent systems for clients: Python, LangChain/LangGraph, MCP/A2A, RAG and vector search, evaluation and monitoring, on AWS Bedrock and GCP Vertex AI. Direct client contact, usually across a few projects.

We're looking for hands-on experience shipping agentic systems to production (not just prompts) and strong Python. Cloud experience is a plus.

Process: intro call -> take-home assignment -> technical interview -> offer.

Apply: https://www.linkedin.com/jobs/view/4478769287/ or bat-el.nativ@opsfleet.com - please mention HN, and tell us about an agent you've built.

Proxima Fusion | Senior Software Engineer (Dev Platform) | Munich, Germany | ONSITE | Full-time

We're building the world's first commercial stellarator fusion power plant. First spin-out from the Max Planck Institute for Plasma Physics, based on Wendelstein 7-X (the largest stellarator ever built), €650M+ raised, teams in Munich, Zurich and Oxford.

Finding a good stellarator design means searching an enormous high-dimensional space, and every candidate design needs heavy plasma physics simulation. That's the compute problem this role owns: cloud + HPC clusters, K8s, Ray, Dask, and the platform work around it (CI/CD, IaC, observability).

You'd sit directly next to the physicists and AI researchers burning through that compute, so you see exactly what your infrastructure unlocks. Python and Linux.

If you've wanted to point your platform engineering skills at something that actually matters, clean, abundant energy, this is about as direct a shot as it gets, and it's happening in Europe.

Interview process: recruiter call, meet the team lead, technical panel, meet the CEO.

https://jobs.ashbyhq.com/proxima-fusion/5aebfef0-0c2c-4c87-9...

Diffusion | All | SF Bay (Redwood City) | On site (office!), full-time Justin here, founder @ Diffusion. Formerly co-founder & CTO @ StrongDM.

We're finding the steepest gradients in the economy between model capability and deployed practice. A large part of that work is currently related to software factory construction.

All career stages welcome (including new grads). We are particularly interested in:

* Current/former founders

* High consequence / high criticality technical backgrounds

* Top decile communicators (writing, speech, video) who also make computer go brrr

Roles:

AI Eng - Factory Architect, AI Eng - Commercial, AI Eng - Compounding Leverage, Applied AI Researcher

Please expect satisfying, dignifying intensity.

Email hello@diffusion.io

Blockrotate | Senior Systems / Rust Engineer | Remote (US/EU timezones preferred) | Full-time | $130k - $170k + Equity

Blockrotate builds low-latency copy-trading and execution infrastructure for Polymarket and prediction markets.

Copy trading on prediction markets has strange market microstructure. Unlike deep perp DEXes (Binance, Hyperliquid), Polymarket orderbooks are bounded, often thin, and subject to severe adverse selection. When a high-volume leader buys, the book moves immediately. If followers lag by a few hundred milliseconds, or if a platform taxes every order with a 50bps fee, follower alpha drops to zero.

Most existing tools in this space either hit users with high per-trade taker fees or ask them to export and paste their master private key into a database. We took a different approach: isolated per-bot deposit wallets (non-custodial via EIP-1967/1271 proxies) and co-located autonomous Rust workers running delta-sync loops directly against the Polymarket CLOB.

Stack:

- Backend: Rust, Tokio, Axum, Protobuf over WebSockets, SQLite (WAL mode)

- Trading Engine: Custom Polymarket CLOB & Data API clients, EIP-712 signing, dynamic slippage ladders, momentum filters, circuit breakers

- Frontend: Next.js 16, React 19, TypeScript, Tailwind CSS

What you’d actually work on:

- Squeezing latency out of the execution hot path (delta position calculation, order placement, nonce handling, fill verification).

- Building better execution protection: momentum filters to dodge toxic order flow, fill stabilization windows, and handling thin book liquidity without moving the market against yourself.

- Scaling worker orchestration: our C2 server talks Protobuf to distributed bot workers with monotonic sequence IDs and autonomous reconnect failover. As bot volume scales, we need to keep state reconciliation bulletproof.

- Investigating and exploiting prediction market quirks (rebate structures, orderbook snapshotting, MEV/relayer bottlenecks).

What we look for:

- Strong async Rust experience (Tokio, concurrency, practical memory management).

- Experience dealing with websockets, exchange orderbooks, or trading infrastructure

shoot an email to jobs@blockrotate.com and tell us why you would be a good fit for us.