Ask HN: Who is hiring? (October 2025)

Klara Inc. provides development & solutions focused on open source software and the community-driven development of OpenZFS and FreeBSD.

We are looking for a medior sysadmin to join our team:

* Administer and maintain FreeBSD servers across customer and internal environments

* Build, update, create, and repair FreeBSD ports and packages

* Manage ZFS storage systems and support virtualization platforms (e.g., bhyve, Proxmox, KVM)

* Challenging, high-impact projects with global customers

* Remote-first environment with flexible working hours

You can submit an application on our website: https://klarasystems.com/careers/freebsd-medior-system-admin...

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: jobs@chainsecurity.com

At Canvas, we’re working on spatial computing - using computer vision to 3D reconstruct and understand your surroundings so that software can operate over real-world spaces. We believe it will power the next generation of augmented reality and some of the key parts of virtual reality as well.

Our most pressing open position right now is a Data Lead (tech lead level data engineer/analytics leader) - Globally Remote, but preferred somewhere between GMT-4 and GMT+2 for overlap with US and EU.

For detailed information check out https://canvas.io/jobs.

Or contact me (Zach) directly at jobs@canvas.io.

Keywords: 3D, computer vision, photogrammetry, geomatics, SLAM, Data Engineering, Analytics

We're building the all-in-one platform for coding education, born from our own frustration as TAs. At CodeGrade, students learn, code (optionally in a browser-based editor with full Jupyter support), and get feedback in one place. We're a small, bootstrapped, profitable, and distributed team looking for a full-stack engineer to help us own and build features end-to-end.

You'll be working with a high-impact team on interesting challenges in a product used by thousands of students globally.

Our Stack: Python (Flask), TypeScript, Vue.js, AWS.

Learn more at https://www.codegrade.com/jobs/software-engineer. Apply or ask questions by emailing me (Thomas, co-founder) at thomas@codegrade.com.