Unitary Foundation | Member of Technical Staff, Fault Tolerant Quantum Compilation + Simulations | REMOTE (US) | Full-time

Unitary Foundation is a 501(c)(3) non-profit research group building a quantum technology ecosystem that benefits the most people. We build open-source infrastructure for quantum computing — current projects include Mitiq, UCC, and Clifft — and run community programs like microgrants and unitaryHACK.

We're hiring an MTS to help define and build our open-source compilation and simulation stack: compilation, simulation, error mitigation, resource estimation, benchmarking, and early fault-tolerant workflows. You'll join a small technical team doing research through sponsored collaborations with national labs, universities, and industry partners. The role is about technical ownership — forming a technical point of view, proposing roadmaps, and building tools that become useful shared infrastructure. There's also room to experiment thoughtfully with AI-assisted research workflows.

We're looking for a track record of building software other people use (ideally open source), a strong background in quantum computing (fault tolerance, error correction, compilation, simulation), and strong Python; C++/Rust is a plus. A PhD is one possible background for this role, but not required.

Apply at https://unitary.foundation/jobs/mtscs/

Phonely | San Francisco, CA | Full Time | Onsite (5 days/week) | Senior Full Stack Engineer

https://phonely.ai

Phonely builds AI voice agents that automate phone calls for businesses. We’re a YC S24 company that raised our Series A in January and are looking for a senior full stack engineer to help build the future of voice AI.

Our stack includes TypeScript, Next.js, Vercel, Python, PostgreSQL, Kubernetes, AWS, Redis, and modern AI models.

We’re looking for engineers who enjoy owning features end-to-end, shipping quickly, and solving hard product and infrastructure problems in a small, high-performing team.

Experience with AI, voice, or distributed systems is a plus, but not required.

Reach out with your CV to recruiting@phonely.ai with “HN Hiring” as the subject.

Spore.Bio | Senior Software Engineer | Paris, France | Hybrid (Flexible)

Spore.Bio is a deeptech startup building a new paradigm in quality control for FMCG (Food & Beverage, Cosmetics, Pharma). We are replacing 200-year-old microbiology methods with advanced optics and deep-learning technologies to detect bacterial contamination directly on the factory floor in minutes, instead of days.

We are looking for a hands-on Senior Software Engineer to design, build, and operate our core backend systems, APIs, data pipelines, and cloud infrastructure. You will be a key technical contributor, building the systems that connect our cutting-edge optical instruments to cloud data platforms.

Tech Stack: Python (FastAPI), PostgreSQL, AWS, Terraform, Ansible, Docker, GitHub Actions

If you are interested in applying software engineering to real-world hardware and microbiology challenges, we'd love to hear from you!

Apply here: https://careers.spore.bio/jobs/7230020-senior-software-engin...

LiveMap | Geospatial Engineers (Data & Routing) | Full-Time | Switzerland or Remote (CH, EU, UK)

Visa sponsorship is not provided.

LiveMap - https://livemap.ch/ - is a funded startup with a vision to build the next generation of mapping apps (think hyper-personalised Google Maps). How that looks is still being explored so we're building prototypes, getting them into customer hands and iterating quickly. We're looking to bring on a couple of people to help accelerate this development process.

As a data engineer you'll set up a data pipeline, work with product to identify relevant datasets, connect, persist and expose that data.

Working on the routing engine you'll extend off the shelf routing engines (Graphhopper) to take into account dynamic run-time preferences & attributes (think temporal).

Please find more information and application forms at the links:

• Geospatial data/backend engineer - https://tally.so/r/68vdyB

• Routing engineer - https://tally.so/r/obdAY1

Happy hacking

Matcha.fm | FULLY REMOTE (US / Canada / Europe / UK / Brazil / LATAM) | Full-time | https://matcha.fm

Repeat founder building something new, hiring for these roles:

Founding AI Engineer (ML/data) - https://matcha.fm/apply/ai

Backend Engineer — https://matcha.fm/apply/be

Full-Stack / Frontend Engineer — https://matcha.fm/apply/fse

Design — https://matcha.fm/apply/design

Marketing / GTM / Growth — https://matcha.fm/apply/marketing

Senior Python Backend Engineer | REMOTE (EMEA/APAC)

We're looking for Python backend engineers to work on a trustless supercluster of performance-proofed GPU-enabled sandboxed docker container runners controlled by truly decentralized algorithms (not just PAXOS or RAFT).

Wow, that was a mouthful...

If you found it interesting, join Reef Technologies and tackle complex technical challenges like this on your own terms:

- Contribute from wherever you like; we are fully remote

- Set your own time commitment, as long as it's at least 30h per week

- See how we work in our handbook: github.com/reef-technologies/handbook

- Influence the way we operate through our Sociocracy 3.0 decision-making process

Salary on a B2B contract:

- 45-70 USD or 180-280 PLN per hour

- Flexible work schedule (as measured with a time tracker)

- We automatically adjust rates based on inflation twice a year

We're looking for someone with 5+ years of programming experience, including at least a year with Python (including open-source and significant personal projects).

So, what do you think? You don't even need a CV; just go to https://careers.reef.pl/?utm_source=hackernews and shoot a few quick commands to apply.

Edit: If you applied and haven't heard back, please check the spam folder of the email associated with the GitHub account you used to apply — our replies sometimes end up there.

richesmonday1@gmail.com

Lokker.com | Senior Backend Engineer, Scanning Infrastructure | REMOTE: North America / Europe, UTC-8 to UTC+2 | Full-time

Lokker is a privacy platform that helps organizations understand and control what is happening across public-facing infrastructure: websites, browser-side applications, scripts, pixels, cookies, tags, forms, SDK/API calls, and browser-side data flows.

We are hiring a senior backend engineer to own and continue to scale Lokker’s scanning infrastructure. This role focuses on backend systems for high-volume website scanning, browser automation, distributed scanning, networking, reliability, performance, and cost optimization.

IMPORTANT: A key requirement for this role is substantial, hands-on production experience with browser automation, headless browsers, crawlers, scanners, synthetic monitoring, scraping infrastructure, or closely related technologies. This is not a general backend role, and we can only consider candidates who have already built, operated, or scaled systems in this domain.

Other relevant experience includes distributed systems, queues/orchestration, high-scale backend services, HTTP/TLS/DNS, proxies, CDNs, WAFs, bot detection, and fingerprinting.

Production experience in Go, Rust, TypeScript/Node.js, C++, or similar.

Apply: https://lokker.com/careers/openings/senior-backend-engineer-...

Amodo Design (amododesign.com) | Sheffield/London, UK | Software Engineer | Full-time | Onsite or Hybrid

We are hiring software engineers who enjoy solving important real-world problems and working close to hardware; who learn new domains quickly and prefer practical solutions over over-engineered systems or unnecessary complexity. You’ll work on the projects best suited for you. Projects range widely, and include:

- Scientific tools

- Automation & robotics (Linux & ROS level)

- Embedded C/C++ (typically owned by dedicated firmware engineers, but software engineers are welcome to learn!)

- Linux, CUDA, Server engineering for our AI safety, security, and verification work

- Custom simulation software (usually python)

- Data analysis pipelines (python)

- Organisational tooling (Typescript, react, postgres, etc.)

Structure: Small teams of software, mechanical, electronics, and firmware engineers build end-to-end systems, typically shipping within a few months.

Apply: https://amododesign.com/career

Aqora Quantum | Sr Full-Stack Engineer (Rust + React) | Paris ONSITE or REMOTE (EU) | €70-90k + equity | https://aqora.io

Aqora Quantum is building the algorithm layer of quantum computing: the place where people develop, share, and orchestrate quantum workflows. Hardware gets most of the attention, but the algorithms and the tooling around them are where the field actually becomes useful, and today that work is scattered across notebooks and one-off scripts. We host versioned datasets and reproducible benchmarks so results are comparable, and give teams a way to publish a workflow that someone else can pick up and run. Think Kaggle/Hugging Face, but for quantum. We're a small but growing team, having just raised our seed round, and we're now extending into the US.

We're looking for one senior full-stack engineer. You'd own features end to end: GraphQL API and services in Rust, React/TypeScript frontend, plus the runner that executes user-submitted workflows against simulators and real backends.

You don't need a quantum background, but you do need to enjoy going deep on an unfamiliar technology and getting productive in it fast. That happens here constantly, and we'll give you the time and the people to learn it properly. Beyond that: production Rust you've shipped and maintained, and real comfort across the stack.

Onsite in Paris or remote anywhere in the EU. If you're not in Paris, expect to join us there regularly for team weeks.

Email jannes@aqora.io with a CV or GitHub, mention HN. Happy to answer questions in the thread too.

Location: Nomading around SEA

Remote: Yes (experienced with US/EU hours and async workflows)

Willing to relocate: yes, within SEA

Technologies: Python, SQL, n8n automations, PostHog, Google Tag Manager (GTM), Google Analytics 4 (GA4), Shopify Web Pixels, Technical SEO, AEO/GEO indexing schemas, HTML/CSS/Tailwind

Résumé/CV: https://lightyoruichi.com/work (Password: aughn182)

Email: harinder.mke@gmail.com

LinkedIn: https://www.linkedin.com/in/lightyoruichi

GTM/Growth Operator & Fractional CMO. I build data-driven marketing systems and organic acquisition engines, transitioning startups from paid ad dependency to compounding organic channels. I like solving hard marketing problems.

I write technical content, build webhook-driven attribution pipelines, and set up analytics dashboards (PostHog, GTM) to make marketing performance transparent. I'm basically a one-man marketing team.

Seeking contract/fractional/full-time roles in growth, technical product marketing, dev rel, or growth operations.

Compensation: $30k-$50k annually

Haystack | Value Engineer, Product Engineering Tech Lead, Growth Marketer, Account Director (EU Institutions) | Berlin, Barcelona, London (remote-first) | Full-time

We build Haystack, an open source LLM framework, and the enterprise platform on top of it. Focus is sovereign AI, on-prem and VPC deployments for organizations that need to run LLMs on their own infrastructure rather than call an external API.

If you want to be part of Europe's push toward AI sovereignty and are looking for complex, high-stakes problems we'd love to hear from you.

Apply: https://jobs.ashbyhq.com/deepsetai?utm_source=hackernews Or reach out directly: https://bit.ly/juliaLN

IVPN | Infrastructure Engineer / Sysadmin | Remote (UTC-1 to UTC+3 only) | Full-time | https://www.ivpn.net

We are a privacy-focused B2C VPN, running since 2010, independently audited every year (#8 in progress), well-regarded in the privacy community. Alongside the VPN we run additional services: modDNS, Mailx and Portmaster.

You'll partner with our senior infrastructure engineer and own day-to-day infra for IVPN and modDNS: rolling out a new immutable, diskless, bare-metal VPN gateway fleet, improving DNS routing, and automating whatever you can. Fully remote, high autonomy: maximum freedom, minimum meetings.

Expected background: - 3+ yrs managing production Linux, including bare-metal - 3+ yrs with a config management tool (Ansible, Puppet or Salt) - Comfortable scripting in Python, Go or Bash - Solid TCP/IP, UDP, SSL/TLS - Genuine interest in infosec (public-key crypto, TPM, reproducible builds)

How to apply: the posting has the full details and a few short questions, apply by email as described there. Questions welcome at viktor at ivpn.net.

https://www.ivpn.net/en/infrastructure-engineer-sysadmin

Odoo | Software Developer | Hybrid (Belgium, 3 days/week) | Full-time | Visa + €10k Signing Bonus | https://www.odoo.com/r/4zN

Odoo builds open-source business apps used by millions. We're hiring software developers to work on our Python/PostgreSQL backend, fast JS framework, mobile apps, website builder, and more.

Why join us:

- €10k signing bonus - Visa sponsorship + relocation support (contains flight ticket + airport taxi + 1 month free housing) - No clients, no deadlines — just clean, open-source code - Pick your team after 3 weeks of onboarding - Great team, countryside office (with chef!), flexible hours

You:

- Master a programming language - Proficiency in object-oriented programming - Strong in SQL and relational database, data structures, and DB design - Passionate, autonomous, and eager to build real stuff

Apply → https://www.odoo.com/r/4zN

Democrance | https://democrance.com | Python/Django/Pyramid/Pydantic AI hacker | REMOTE (working in Dubai-UK timezones)

We’re a mature microinsurance SaaS startup, building software to help bridge the gap between insurance companies and those who are not insured or under-insured. High traffic, mobile first + SMS platform that requires some interesting compliance and security requirements with deployments in countries with variable quality infrastructure. Now with added AI sprinkled on top to automate underwriting and data collection tasks - enabling lower cost insurance and reaching wider/underserved markets.

Stack is Vue.js with mostly django in the back end although pyramid/sqlalchemy is being used in our analytics dashboard. Plenty of third party api integration. Gitlab, unit tests, and continuous integration are standard.

Our devops stack includes Ansible and Terraform, and we operate across the major cloud providers, as well as a few smaller players! Mature and international dev team with a few PhD’s included.

Our QA Automation stack is built in Selenium in Java, and we're exploring Playwright as a complementary technology. Understanding of GIT, CI/CD pipelines debugging issues related to them will be key. Experience with TestNG, Maven or Gradle welcome!

We’re looking for both mature candidates and juniors - industry experience is of course welcome.

Please apply to together@democrance.com by clearly stating the role you want to apply for, your name, current location and visa status, your notice period, salary (Please do not apply again if you already have).

https://www.democrance.com/senior-back-end-software-engineer...

Viteus | Contract Engineer Opportunities — AI Production Support (Full-Stack, AI/ML, QA, DevOps) | REMOTE | Contract

Viteus is Alteus's production support service for AI-built applications, delivered in partnership with vitX. We work with enterprises and scale-ups across APAC to audit, refactor, and support AI-built apps in production.

When we win client engagements, we match contractors from the network onto projects based on skills fit, availability, and role requirements.

The Opportunity:

We are inviting independent contractors with experience across the following disciplines to register interest for matching against upcoming client engagements:

  Full-Stack Engineering
  AI/ML Engineering
  QA / Test Engineering
  Test Managers / Test Leads
  DevOps Engineering

What You Will Do

  Work on production-grade AI applications for enterprise clients across APAC.
  Contribute to audit deliverables: risk shortlists, architecture assessments, vulnerability lists, smoke tests, AI risk flags.
  Support refactor and stabilisation work on AI-built apps handed over from client teams.
  Operate day-to-day inside a modern AI toolchain — Claude Code, Cursor, GitHub Copilot, agent frameworks, and MCP-based workflows are standard.
  Report into a senior lead who owns delivery quality and client communication

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, technical screen, technical panel, CEO call.

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

Proxybase | Backend Systems Engineer (Rust) | Remote (Global) | Full-Time | https://proxybase.xyz

Hi HN,

I’m the founder of Proxybase [0]. We’re building an agentic SOCKS5 proxy network designed to bring transparency and ethical sourcing to the residential proxy market.

Quick note to anyone who applied last month: First off, thank you to everyone who reached out. We got hit with way more high-quality applications than expected, and between running day-to-day operations and working through the backlog, we took much longer to respond than we should have. If you applied last month and haven't heard back, we're genuinely sorry for the delay, we are actively reviewing those responses alongside this batch.

Why Proxybase? Historically, the residential proxy industry has been pretty shady, think hidden background scrapers bundled into TV firmware or mobile apps, combined with predatory payout systems that hold provider funds hostage for months.

We’re taking a different approach:

Fully Open-Source Clients: Our GUI [1] and CLI [2] are completely open-source so anyone can inspect and audit what we run. Explicit Consent: Providers knowingly opt in. No stealth bundling. Instant, Fair Payouts: $1 minimum payout threshold sent directly to provider wallets via US stablecoins—no holding funds to farm interest.

What We’re Looking For We’re looking for a Backend Systems Engineer (Rust) to help us build out our asynchronous SOCKS5 routing infrastructure, daemon node orchestration, and automated bandwidth allocation pipelines.

Stack: Rust (Tokio / Axum), SOCKS5 protocol, Linux systemd daemons, SQLite Location: Fully Remote (Async-friendly, flexible timezone) Compensation: Competitive salary + equity (USD or stablecoin options available)

If you're interested in building infrastructure for an industry that desperately needs better standards, send an email to jobs@proxybase.xyz with your GitHub/resume and a short note on what you’ve been working on lately.

I’m also around in the comments if you have any questions or feedback on what we're building.

[0] https://proxybase.xyz

[1] https://github.com/proxybasehq/proxybase-gui

[2] https://github.com/proxybasehq/proxybase-cli

Prior Labs | Berlin / Freiburg / NYC | ONSITE | Full-time | Multiple Roles | https://priorlabs.ai

Deep learning transformed text and images but mostly skipped tables - the data behind most clinical trials, financial models, and scientific experiments. The reason is structural: no natural sequence, no spatial structure, no shared vocabulary across datasets, so the architectures and scaling laws behind LLMs don't transfer.

Our approach: pre-train a transformer on millions of synthetic datasets sampled from causal-structure priors. Your whole dataset goes in as context, predictions come out in a single forward pass - no per-dataset training, no hyperparameter tuning, seconds instead of hours. It works: TabPFN v2 was published in Nature and set a new state of the art; TabPFN-3 scales to 10M rows. 4M+ downloads, 8k+ GitHub stars, production use from liquid biopsy to rail maintenance. As of last month we're an independent lab inside SAP, backed by €1B+ - models stay open, research stays public, same team and offices.

Open roles (most can sit in any of our three offices):

Senior ML Infrastructure Engineer - own multi-cluster GPU infra (Slurm on GCP today, multi-provider next), training performance, and the tooling layer. We spend tens of millions/year on compute; you own that budget.

Research Scientist, Foundation Model - drive the model agenda: novel architectures, scaling 10K to 1M+ samples, multimodal and causal directions. PhD + top-venue publications or equivalent.

Research Engineer, Foundation Model - same agenda from the engineering side: you design experiments, write the training and eval infra, and co-author the papers.

ML Engineer, Cloud Platform - design and scale the backend that serves and finetunes the models. Python/FastAPI, Terraform, K8s.

Full Stack Engineer, ML Platform - build the product end to end. TS + Python, React/FastAPI/Postgres.

Also hiring: Applied Scientist, Forward Deployed ML Engineer, Research Scientist (Foundational Data Science), PhD research interns, plus GTM and ops roles.

~40-person team with backgrounds from Google, DeepMind, Jane Street, Goldman, G-Research, CERN. Led by Frank Hutter, advised by Bernhard Schölkopf and Yann LeCun. Comp competitive with top AI labs.

All roles: https://jobs.ashbyhq.com/prior-labs

Kadoa | Software & Web Scraping Engineers | Remote | Full-Time | https://kadoa.com

We are building the web data layer for finance. Our coding agents build, monitor, and repair deterministic ETL pipelines that produce the most reliable datasets for investors. We serve many of the top hedge funds and asset managers.

Open roles:

- Senior Software Engineer: https://www.kadoa.com/careers/senior-software-engineer

- Web Scraping Engineer: https://www.kadoa.com/careers/web-scraping-engineer

Reasons you’d love working with us:

* Work with a a lean and very talented team of engineers in a drama-free and distraction-light environment.

* All founders have spent years in the trenches writing web scraping and ETL code and still do it almost every single day.

* Fully remote job with flexible working hours and vacation.

* Minimal distance between the code you ship and the customers who use it. You will get to work with some of the world's top investment firms.

If you're interested, please submit this form: https://forms.gle/JRYUvcbkcdMNejzG9 and I'll be in touch. Not a fan of doing this, but similar to others, my inbox is drowning in AI-generated job applications and need to stay efficient.