ALT | Remote (EU) | Full-time | Frontend Software Engineer

We're a small, established company specialising in subsurface instrumentation development, as well as the software needed to handle subsurface data. As of right now, we're working on a product to streamline management, delivery and visualisation of data.

Currently chasing a frontend developer with a flair for UI/UX design, and experience in Vue.js and D3. Must have a strong mathematical background.

Open to employing via company-of-record (such as remote.com), or direct B2B consulting. If you're in Luxembourg, we can employ you directly. Reach out to me at jobs <at> alt.lu.

Klara Inc | Fully Remote | Global | Full-time Contract Developer

Klara Inc (klarasystems.com) provides development & solutions focused on open source software and the community-driven development of OpenZFS and FreeBSD. We develop new features, investigate/fix bugs, and support the community of these important open source infrastructure projects. Some of our recent work includes major ZFS features such as Linux Containers support (OpenZFS 2.2: https://github.com/openzfs/zfs/pull/12263), and Fast Deduplication (OpenZFS 2.3: https://github.com/openzfs/zfs/discussions/15896).

We successfully hired from HN in the last round and are looking for more OpenZFS Developers (3+ years of experience) to join our team!

- Strong skills with Kernel C programming and data structures

- Experience with file systems, VFS, and related operating system concepts (threading, synchronization primitives/locking)

- Awareness of ZFS (MOS, DMU, ZPL, pooled storage, datasets, vdevs, boot environments, etc) concepts.

You can submit an application on our website: https://klarasystems.com/careers/openzfs-developer/

If you'd rather talk to us via e-mail, just drop us a line at Email is hidden.

Promptfoo | Multiple Roles | Remote US (HQ: San Mateo, CA)

About us:

Promptfoo builds the leading open-source framework for LLM security and evaluation. Our tools help over 50,000 developers test and secure AI applications. Backed by a16z and led by YC alumni, we are shaping the future of AI safety.

Open Roles:

- Staff Engineers

- Research Engineers

- Developer Relations

How to apply:

- Try Promptfoo at <https://promptfoo.dev>

- Review our code at <https://github.com/promptfoo/promptfoo>

- Email Email is hidden with "HN" in the subject, your GitHub/LinkedIn, and a brief note on why you're excited about our work.

Join us in building safer, more reliable AI.

Extend | Senior/Staff Software Engineer | NYC | Full-time | | $175k-$250k | 0.50% - 1% Equity

Extend is building a next generation document processing platform (massive market w/ low NPS existing solutions) (https://extend.app/)

Apply here: https://jobs.ashbyhq.com/extend/9d4d8974-bd9b-432d-84ec-8268...

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Why you should consider joining:

- We're looking for engineer #3, lots of equity, culture of high impact and ownership, in-person in NYC

- We've accelerated revenue 15x this past year to 7-figures in ARR

- Our customers include companies like Chime, Flatiron Health, Brex, Opendoor, Checkr, and many more

- We're supporting customer and revenue metrics with 1/2 the team size of other startups, so everyone joining at this stage will have outsized impact

- Backed by YC, Homebrew, investors from OpenAI, and more

Blue Origin (https://www.blueorigin.com) | Software Engineer/Manager (multiple levels) | Seattle/Huntsville/Space Coast | Full Time/Internships

Blue Origin develops reusable rockets and engines (including the now-orbital New Glenn[1]), a human-rated lunar lander[2], a space station[3], and some other big projects, with the mission of going to space for the benefit of Earth.

My team is in supply chain and manufacturing technology. We're hiring for software engineers and managers at multiple levels:

- Software Engineer 3 ($148k-$207k): https://blueorigin.wd5.myworkdayjobs.com/blueorigin/job/seat...

- Sr. Software Engineer ($177k-$248k): https://blueorigin.wd5.myworkdayjobs.com/blueorigin/job/spac...

- Principal Software Engineer ($207k-$290k): https://blueorigin.wd5.myworkdayjobs.com/en-us/blueorigin/de...

- Sr. Software Engineering Manager ($191k-$267k): https://blueorigin.wd5.myworkdayjobs.com/blueorigin/job/spac...

If that's not your bag, we're hiring in just about every other engineering discipline, including lots of embedded software. 454 open positions as of this writing: https://www.blueorigin.com/careers/search

(Export control laws require us to hire exclusively US citizens, Green Card holders, or those in "protected person" status)

Feel free to email me with any questions.

gl; hf; dd.

[1] https://arstechnica.com/features/2025/01/after-the-success-o... [2] https://en.wikipedia.org/wiki/blue_moon_(spacecraft) [3] https://en.wikipedia.org/wiki/orbital_reef

Albemarle | Process Controls Engineer | On-site: Magnolia, AR, USA

Albemarle is a leading provider of lithium, bromine and other essential elements.

Control System programming and troubleshooting (Wonderware, APT, Workshop, Control Wave, Rslogix, Panelview, CL code, Display Builder, Control Builder).

Maintain existing control systems and plant historian, including hardware, and software, (Siemens 505, Allen Bradley SLC500, Honeywell TPS and Experion, Bristol Babcock, misc PLC's, Wonderware, and Pi historian).

Maintain a LAN of MS Windows Servers 2012 with HyperV, Operator Workstations (Windows 10), Application Servers and Engineering Workstations and all software associated with each.

Full job description and apply here: https://albemarle.eightfold.ai/careers?location=us&pid=10995...

Social Tech | Founding Engineer | Berlin, Germany | Full-time | ONSITE/Hybrid

Our aim is to build an operating system for the next wave of social experiences, starting with dating.

We are backed by serial entrepreneur angel investors, have experience from venture-backed startups and Stanford, and early signs of PMF. We are looking for a Founding Engineer to help us build our tech stack from 0->1. You will play a pivotal role as our first hire and collaborate with the founders to build our product.

Who you are: - Entrepreneurial Engineer: With full-ownership of the techstack, ready to experiment rapidly and lead a growing team. - Obsessed with Social Data: Excited to leverage a rich user database to create personalized products. - Human-Centered & Collaborative: Ideally familiar with human-centered design and agile product development to work with the Product lead to build an exceptional product.

What you’ll do: - Database Design from 0-1: Design and implement scalable and reliable infrastructure to support our growing user base. - Rapid Prototyping: Experiment with and iterate on product ideas to quickly identify what resonates with users. - Drive the Vision: Contribute to the long-term technical strategy and help make critical decisions that shape our company’s future.

Contact: Email Email is hidden to set up a call.

Go-ethereum | Berlin, Boulder, Remote | Full-time | Staff Software Engineer

Geth (go-ethereum) is an Ethereum execution client written in Go. It underpins the Ethereum protocol and many other projects around it. The team is seeking an individual contributor who likes working on a large and well-established production codebase. We value individuals who are able to think on their own, see complex projects from start to finish without intervention, and are able to jump into whatever is necessary in the project.

The Geth team is decentralized with members in the USA, across Europe, and in China. As such, fully remote work is possible. We have a slight preference toward hiring in Boulder (Colorado) or Berlin (Germany) since Ethereum Foundation has offices there.

Geth resides within the Ethereum Foundation. The EF is a global non-profit organization dedicated to supporting Ethereum and related technologies. Our mission is to do what is best for Ethereum’s long-term success. Our role is to allocate resources to critical projects, to be a valued voice within the Ethereum ecosystem, and to advocate for Ethereum to the outside world.

Please send applications here: https://jobs.lever.co/ethereumfoundation/8d9b1823-ba67-4195-...

Brilliant.org | Software Engineers | Remote (North America), SF, NYC | Full-time | $175k — $230k | https://brilliant.org

Brilliant is building world-class interactive learning experiences that combine challenging problems, compelling narratives, and delightful visual storytelling.

We're hiring for a number of engineering roles to help craft the next generation of interactive learning and change how the world learns.

Engineers at Brilliant think about both "building the right thing" AND "building the thing right" while pursuing high standards of excellence for ourselves, our product, and our codebase.

If you're energized by the prospect of doing the best work of your career and changing how the world learns alongside the most talented peers you've ever worked with, you can learn more and apply here: https://brilliant.org/careers.

Cathmere | Sr Engineer | Hybrid NYC | Full Time | https://cathmere.com

We are are a seed-stage startup revolutionizing how capital flows to emerging markets through our innovative fintech platform. We're seeking an exceptional Senior Engineer to help build our end-to-end solution that connects US investors with high-impact equipment financing opportunities in emerging markets. Our challenge is to build a scalable platform that captures real-world asset performance via multiple streams of operational and financial data in a decentralized network of business counterparties.

Responsibilities

- Build and maintain a decentralized processing system that can handle a high throughput and complex counterparty relationships

- Creating data models that support complex financial analytics

- Implementing data quality monitoring and validation systems

- Developing APIs for real-time data access and analytics from decentralized ledge

Must Have

- 5+ years of experience building complex distributed or decentralized systems and strong communication skills

If you’re interested in learning more, email Email is hidden