ChainSecurity | Blockchain Security Engineer | Full-time | INTERNS , HYBRID/REMOTE, Zurich, Switzerland | VISA possible | https://chainsecurity.com/

ChainSecurity is a young and innovative cybersecurity company that operates in the blockchain and cryptocurrency space. Our mission is to make the blockchain space secure and trustworthy for people, companies, and governments alike. We are proud of our security experts from the renowned universities ETH Zurich, EPFL Lausanne and others.

We are trusted by 100+ blockchain companies and established corporations with security audits and services. We have secured complex systems for top blockchain clients, such as decentralized finance (DeFi) projects, and multinational organizations, such as banks and industrial consortia. A ChainSecurity Auditor will review the most complex blockchain projects to find vulnerabilities which no-one else can. By using state of the art tools, expert knowledge and a deep understanding of the fundamentals, we secure projects handling billions, often forming the foundation in the new paradigm of an open financial system.

Your Responsibilities:

* Work directly with the developers of the most successful teams in the blockchain industry to audit their code and secure their products

* Contribute to our security tools and create new ones in collaboration with our internal research team

* Conduct security research and publish your findings

Requirements:

* Strong background in software engineering, focused on security relevant areas and most importantly being able to reason about complex code

* Experience with penetration testing, vulnerability scanning, threat modeling or similar is a plus

* Good knowledge of cryptography

* Proficiency with Linux and Git

* Good written communication skills

* Fluent in OOP programming language

Bonus Points:

* Formal Verification, White Box, Vulnerability Scanning

* Solid Blockchain Knowledge

* Consensus Algorithms

Join us here: https://www.chainsecurity.com/jobs/blockchain-security-engin...

Questions about the role? Contact: Email is hidden

Obie | Chicago, IL (Hybrid Tue/Thu) or Remote (US) | Full-time | Product Manager; Technical Project Manager (TPM) | https://ats.rippling.com/obie/jobs/76234395-2934-4746-a421-5..., https://ats.rippling.com/obie/jobs/4891a38c-9a69-47fa-9cc7-8...

Obie is an insurtech building modern software and tooling for a heavily regulated industry. We ship customer-facing product and internal platforms that handle complex workflows, partner constraints, and real-world edge cases — with a strong emphasis on systems thinking, product quality, and moving quickly without being reckless.

Roles: - Product Manager (platform with multiple surfaces/users/channels; strong product taste + technical curiosity) - Technical Project Manager (end-to-end delivery across engineering pods; scope/tradeoffs/dependencies/release readiness)

Apply via the links above. More info: https://www.obieinsurance.com/careers

eventfirst | Senior Full-Stack Engineer | Berlin, Germany | REMOTE (CET) | Full-time

We are applying AI to organize corporate events.

We are looking for a senior engineer with at least ten years of full stack experience, a strong focus on product and UX, and optionally some experience building LLM based products. Currently we are focussed on building tooling that enables us to capture domain knowledge from experts to streamline prompt creation and evaluation. Our tech stack is Typescript, React, Next.js and Tailwind. On the backend we use Drizzle with Neon, deployed and monitored via Vercel. We have pre-seed funding from a major US VC and are experienced founders. You’ll be working alongside the founders (ex-Apple, ex-Airbnb, ex-Tulip, ex-Tourlane) and will have a chance to shape the company, product and of course the engineering culture.

Apply here: https://eventfirst.jobs.personio.com/job/1646275

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:

Product Analyst (Seattle) Lead Data Analyst (Barcelona) Manager, Product Analytics (Barcelona) Senior Business Intelligence Analyst (Barcelona) Senior Product Analyst (Barcelona) Data Engineer (Barcelona) Staff Engineer, Payments Team (Seattle) Lead/Senior Software Engineer (Barcelona) Senior Frontend Platform Engineer (Barcelona) Senior Product Engineer (Barcelona) Manager, Product Design (Barcelona) Senior Product Designer (Barcelona) Senior Product Designer (Seattle)

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

CASUS | Full-time | Remote (EU time zone) + Quarterly Meet-ups | https://getcasus.com

We are looking for a Fullstack Engineer and AI enthusiast to join our engineering team.

We are rebuilding the core tool stack of the legal industry from the ground up. Lawyers still work in workflows designed decades ago: fragmented tools, manual reviews, static templates, and compliance processes that don’t scale. We think that’s unacceptable in an AI-first world.

This job is for you if you:

Love building from 0 to 1 and validating ideas quickly. Have a fullstack skillset, enjoying collaborating across the stack. Used to leveraging AI to code and most of your code is written with AI. Are curious about AI integration (e.g., LangChain, Azure LLMs) and want to push boundaries. Prefer startup speed over corporate processes.

Only apply if you've been heavily leveraging AI to code - our team moves at lightning speed.

apply here and show us the project you're most proud of: https://join.com/companies/casusch/15584391?

StorPool | Senior Software Engineer - Storage Core (C/Linux) | Remote (UTC-1 to UTC+5) | Full-time | Multiple roles

StorPool is building the future of data storage. Our software runs at the heart of modern clouds, delivering <100µs latency, 113M+ IOPS per cluster, and 99.999% availability. We're profitable, self-funded, and our customers love us (NPS off the charts).

We're looking for a Senior Software Engineer to join our Core Storage team. You'll tackle genuinely hard problems: writing custom Linux drivers, optimizing lock-free data structures at nanosecond scale, building fault-tolerant distributed algorithms, and debugging issues that go all the way down to kernel internals. This isn't CRUD work - it's systems programming at its most challenging.

Competitive salary, fully remote, meaningful time off, and a yearly education budget to keep learning.

If you get excited about shaving microseconds off I/O paths and building infrastructure that simply doesn't break, we should talk.

Apply here: https://storpool.com/force/senior-software-engineer-storage-...

Proton (https://proton.me) | Privacy & productivity | Full-Time | Europe, hybrid ONSITE, visa sponsorship | Scale-up, bootstrapped, profitable

I am listing mostly Mail desktop related positions, but there are a lot more on the site. New rust based client architecture: https://proton.me/blog/next-generation-proton-mail-mobile-ap...

1. Senior Software Engineer | London (UK), Geneva (Switzerland), Barcelona (Spain) | Windows, Linux, Rust, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4766179101

2. Software Engineer | London (UK), Geneva (Switzerland), Barcelona (Spain) | macOS, Windows, Linux, Rust, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4585460101

3. Staff QA Automation Engineer | London (UK), Geneva (Switzerland) | Mobile, Desktop | https://job-boards.eu.greenhouse.io/proton/jobs/4653905101

4. Senior Product Designer | London (UK), Paris (France), Barcelona (Spain) | Mobile, Desktop, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4606437101

5. Senior Product Manager | London (UK), Paris (France), Barcelona (Spain), Geneva (Switzerland) | Mobile, Desktop, Mail | https://job-boards.eu.greenhouse.io/proton/jobs/4364312101

Nango | Full-time | Remote (North America, LATAM, Europe) | https://nango.dev

Nango (YC W23) is a developer infrastructure company and the leading provider of API access for agents and apps. It enables AI applications to connect to the real world through integrations.

More than 250 paying customers rely on Nango today, including Replit, Mercor, and Exa. We are a YC-backed, multi-million ARR company with a team of 10 from AWS, Snyk, Netlify, Uber, Samsara.

We’re hiring for the following openings:

* Backend engineer

* Product engineer, Customers

* Product engineer, Growth

* Chief of Staff

* Developer Content Engineer

Find out more, and apply at: https://jobs.ashbyhq.com/nango

AIRMO | FE, FS, ML engineers | Luxembourg | ONSITE

AIRMO is a European climate-tech company using space and airborne technologies to monitor greenhouse gas emissions globally. Our instruments — combining LiDAR and hyperspectral imaging — detect and quantify methane and CO₂ emissions from industrial sites, pipelines, and national infrastructure.

We’re building a global monitoring system from air to space, helping energy companies, governments, and investors take real action on climate impact.

We are hiring a frontend, fullstack and an ML engineer in our new Luxembourg office. This team will be responsible for building out our data platform frontend, that allows users to interact with satellite tilesets and derivative information. You must be located in Luxembourg, or be willing to relocate.

https://www.airmo.io/careers

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

We’re building an AI system for analysts and scientists, based on a fundamentally new approach to reasoning and knowledge representation. Our approach differs from LLMs in that we compose algorithms symbolically to represent complex knowledge, and perform probabilistic computations. This enables the AI-driven application of statistical models to different problems, while providing the user with a verifiable reasoning path, and an assessment of the uncertainty in each answer. We are developing applications for analysis and research in domains such as Finance, Strategy Consulting, Engineering, and more.

This is a chance to shape a new approach to knowledge representation from the ground up, working alongside a collaborative team driven to solve hard problems.

We’re hiring for the following openings:

* Product Software Engineering (Quantitative Modeling)

* Bayesian Software Engineering

* Program Synthesis Engineering

* Technical Project Manager

* Finance Manager - Corporate & Accounting

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

Questions? Get in touch: Email is hidden