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 a force for good in an industry tarnished by rip-off agencies. Enabled by an unrelenting focus on technology, we now let more properties than any agency in the UK. In the last 12m we let over £50 billion worth of property, to over 7 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 VC backed, profitable, and have plenty of ambition to maintain our fast growth in this absolutely massive market.

Roles currently available:

- Senior UX/UI Developer | Equity | 100k+ (based on experience) + quarterly bonus

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

Zeven | Senior Backend Developer | ONSITE in Zurich (Switzerland) | Full-time | Competitive salary + stock options

We're a newly-founded and well-funded startup that is seeking to revolutionize the sports industry with AI-powered solutions. Our mission is to unlock human potential and redefine the sports experience through innovation and technology.

We are looking for an experienced Senior Backend Developer and sports enthusiast to join our on-site team in Zurich, Switzerland. This is a hands-on, high impact role. We use Typescript for web, Python for ML, PostgreSQL, React + TanStack, AWS and SST.

Please see the Full Job Description [https://tinyurl.com/sw-zeven] for requirements and more details about our Tech Stack.

We are offering full-time employment with a competitive package:

• Competitive salary and stock options.

• Pension plan bonus and 25 days of paid vacation plus public holidays.

• Charming office next to the lake of Zurich with fully-equipped kitchen.

• Top-notch equipment (MacBook Pro laptops, standing desks, etc.).

• We love to organize company outings and sport events.

If you're a motivated and experienced backend engineer who is crazy about sports and looking for a new challenge, we'd love to hear from you! Please email CVs to alex@zeven.ai

We do not consider remote candidates, agencies and candidates located outside the EU/UK/EEA/Switzerland

Proton | AI Engineer | Geneva, Paris, London, Barcelona, Prague, Taipei, EU Remote | Full time

We recently launched Lumo, a privacy-friendly ChatGPT alternative, by the makers of Proton Mail & Proton VPN.

We are looking for curious and talented people to help us grow Lumo with any of these skills: ML engineering, LLM inference, GPU infra & devops, Frontend (Typescript, React), Backend (Rust, PHP). Looking for senior-level or fast-growing juniors.

I'm one of Lumo's core devs, write to me directly at marc dot dupont, domain proton ch, with "HN" in the subject.

https://lumo.proton.me

Rover | Barcelona, Spain & Seattle, USA | Software Engineers (Multiple Roles) | Full-time

Rover is the world’s largest online marketplace for pet care. We connect millions of pet parents with trusted sitters and walkers, and we’re building a global platform that combines technology, community, and love for animals. With offices in Seattle, Barcelona, and beyond, we’re scaling an engineering culture focused on high-quality code, data-driven product decisions, and customer empathy. Open Roles: Lead/Senior Software Engineer, Acceleration (Barcelona)

Lead/Senior Software Engineer, Client Platform (Barcelona)

Lead/Senior Software Engineer, Sitter Experience (Barcelona)

Software Engineer II, Orders (Seattle)

Apply: https://www.rover.com/careers/engineering

Revere Defense Technologies - Autonomous Networks and Infrastructure

San Francisco (Dogpatch) | On-site w/ flexibility | Full-time | Multiple Roles, $120k–220k + equity + benefits

Why: Comms are contested. Radios make you a target, satellites aren’t guaranteed, and brittle legacy networks won’t survive future fights.

What: We’re building an autonomous maritime network — think distributed systems in the ocean—extending resilient comms, sensing and compute to the edge in high-threat remote environments.

Who we are looking for:

- Software Engineers: large-scale distributed systems, networking, system design, embedded software, DevOps rollouts. Python, C++, Rust. Bonus: SDR, mesh, security.

- Electrical Engineers: PCB layout, embedded, RF, circuits, power/batteries, electro-mechanical. Bonus: DSP.

- Marine/Mechanical Engineers: pressure vessels, subsea robotics, gliders, ruggedized design; DFM, reliability, field deployment.

You will: ship code to robots, test on the water, move fast, own big surface area, and work directly with military operators.

About Us: Our founding team includes a Navy SEAL veteran, defense industry engineers, builders, hackers, and watermen (sailors, boaters, divers, fishermen). We’re focused on real future missions — not legacy requirements. Venture-backed; public launch soon.

Please send a short note + resume/portfolio to jobs@reveredefense.co with subject HN – Engineering.

Fundamental Research Labs | Fullstack, Product, + Software Engineers, Ex-founders, Researchers | Menlo Park, CA | https://fundamentalresearchlabs.com

We're an applied research company building autonomous, collaborative, and socially intelligent agents. Our small team includes computational neuroscientists, AI researchers, engineers, and builders from MIT EECS, Stanford NLP Group, Google X, Citadel, and beyond.

Our latest product, tryshortcut.ai, just launched over the summer to amazing reception and we’re just getting started.

We compensate well above market and provide generous equity.

We’re looking for:

—> Engineers and ex-founders to build Agent-first products. We have an organizational structure where product leaders are given great autonomy to experiment and ship fast.

—> Researchers to develop frontier technologies in the Agents domain. We do everything from sophisticated Agent orchestration to SFT/RL post-training of foundation models.

https://jobs.ashbyhq.com/fundamentalresearchlabs

*BLACKLANE IS HIRING!* (Berlin / Barcelona / London – HYBRID) https://www.blacklane.com/en/career/ped/

We are Blacklane, a global, premium chauffeur service company, operating in 50+ countries.

As part of our engineering teams, you will help develop the services that power the Blacklane, work on improving our back-office system, or solve problems around our products which allow business partners to integrate with the Blacklane platform.

We are looking for:

# Senior Software Engineer – Backend → Apply: https://grnh.se/3z4sljwi2us

# Software Engineer – Backend → Apply: https://grnh.se/lrj4si102us

Our stack includes Ruby, Go, TypeScript, and Java services (DDD) deployed on Kubernetes, communicating via SQS and Kafka. We use Postgres, MySQL, Elasticsearch, Redis, and DynamoDB, with AWS and Terraform for infrastructure.

Greenline | Founding Engineer Roles | Remote (U.S. only) | https://www.greenline.ai/careers

Greenline unlocks mortgage lending for self-employed borrowers.

We just closed our seed round led by Bowery Capital and Uncork to tackle this messy problem. More importantly, we're launching with the largest lenders and investors in the mortgage-backed securities market.

We're growing our founding team:

- product/ full stack engineer: own and accelerate customer-facing feature development

- backend: lead core, data-centric systems and infrastructure

- platform/ API: architect and build a public-facing ergonomic API for scalable integrations with enterprise systems, critical to unlocking key customers and partner-driven growth.