Proton builds the privacy-first alternative to Big Tech: Mail, VPN, Drive, Pass, Calendar, and Lumo AI. We're profitable, have no VC control, and are majority owned by the nonprofit Proton Foundation, so no one can force a change in mission.
The Drive Foundation team builds the core SDK powering every Proton Drive client,C#, TypeScript, and Rust daily, with Swift and Kotlin bindings for mobile. It's foundational work: what you build here ships to every Drive client, and there's a crypto model revamp plus a Rust based next gen SDK on the roadmap.
Looking for someone with 5+ years of professional software experience and strong Rust expertise (ownership, concurrency), plus experience building libraries for client applications (web/mobile/desktop). Don't check every box but think you'd be a strong fit? We say apply anyway.
Apply here: https://job-boards.eu.greenhouse.io/proton/jobs/4630103101
>> Staff Developer Advocate - Community & Events: https://jobs.ashbyhq.com/livekit/8ce9b064-e20b-4c71-8c53-385...
>> Staff Security Engineer: https://jobs.ashbyhq.com/livekit/efc06ff8-37c4-473e-8de8-bbb...
>> Forward Deployed Engineer (Remote, NYC): https://jobs.ashbyhq.com/livekit/b889ef16-4d5d-4b71-b0a9-682...
>> Forward Deployed Engineer (Remote, India): https://jobs.ashbyhq.com/livekit/2702511f-38b1-41b3-906d-6d1...
>> Forward Deployed Engineer (Remote, London): https://jobs.ashbyhq.com/livekit/2b51446f-f78f-41da-91f9-41d...
Co-founders: Russ d'Sa (CEO/Cofounder) https://www.linkedin.com/in/russelldsa/ & David Zhao (CTO/Cofounder) https://www.linkedin.com/in/davidzhao/
Check out our blog: https://livekit.com/blog
Our other roles: https://livekit.com/careers?utm_source=1bpyr8q375
Tech used: AWS, Azure, Big Data, Bash, CI/CD, Hadoop, Hive, Informatica
We are seeking a highly skilled Azure Data / DevOps Engineer to join our dynamic team. In this role, we work on large-scale data projects within the Azure environment, focusing on cloud-based data solutions that deliver optimal performance and security. We offer an engaging environment where innovation meets technical excellence, with the opportunity to advance expertise in cloud-based data engineering and DevOps practices within a collaborative team setting.
More details and option to apply: https://devitjobs.uk/jobs/Assura-Protect-Azure-Data-DevOps-E...
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.
We are building an autonomous trust layer to enable audits to shift from a compliance burden to a world where auditors can provide companies the assurance needed to adjust continuously in an ever-changing world.
We are a small, product-obsessed team based out of London and San Francisco, backed by some of the world’s leading investors and driven by the ambition to use AI to reinvent a whole industry.
Stack: AWS, TypeScript, Temporal
Apply: https://usebead.ai/careers
Electric Twin builds science-based synthetic populations — LLM-driven AI agents that simulate human behaviour, so companies and governments can test ideas and explore uncertainty before they commit. We've just entered a major growth phase: new funding, a growing customer base, and a platform still taking shape. We're hiring across engineering and science:
Research Engineer (Science Team) — Pioneer the application of LLMs to model human behaviour: design cognitive and LLM-based architectures, figure out how to evaluate agent behaviour in ambiguous scenarios, and build experimental methods to validate simulations. MS/PhD or equivalent practical experience; strong Python and ML frameworks; rigorous scientific mindset. Feel free to DM: yoanna.peneva@electrictwin.com
Product Engineer (Engineering Team) — Own problems end-to-end where behaviour, prediction, and UX meet. React, Next.js, Python, FastAPI, SQL, GCP. Your choice of Claude, Cursor, or Codex. Multiple roles across all levels. Feel free to DM: harry.smith@electrictwin.com
Small, senior team. Benefits include pension matching (4–8%), £1,000 annual L&D budget, Cycle to Work, and the kit you need.
MeanderX is building AI-powered grid intelligence for renewable energy developers.
The hard part of clean energy is not just building solar, wind, and storage. It is knowing where new energy generation can connect fastest to the grid.
We’re hiring a Senior Full-Stack Engineer to own high-leverage systems end-to-end: AI data analysis pipelines, scraping infrastructure, LLM extraction workflows, internal AI tools, and our customer-facing platform.
You should be excellent at coding, fast at shipping, self-directed, comfortable using modern AI tools, and excited to work across product, data, infrastructure, and automation.
Bonus points for experience in power engineering, renewables, grid infrastructure, geospatial data, scraping, document AI, or large-scale data pipelines.
High ownership, very little bureaucracy, and real impact on renewable energy deployment.
Apply: applications@meanderx.com
We're hiring a Trust & Safety Engineer to join Runway's AI Safety and Responsibility team. Runway builds AI world models - general-purpose simulators for robotics, science, and storytelling — and this role exists to keep that safe as it reaches millions of users.
Stack: TypeScript API on ECS/Fargate, Python/PyTorch inference backend, Claude + Gemini for safety/moderation, ClickHouse for abuse signal detection, AWS + GCP, Terraform, Prometheus/Grafana.
It's a generalist role, hands-on across the full engineering lifecycle - from model pre-training through productionisation. We're looking for 3+ years production Python or TypeScript, comfort across the stack, and experience with data pipelines (ClickHouse a plus).
Apply here: https://jobs.ashbyhq.com/runway-ml/c3ebd871-ea78-4b71-80a2-7..., or feel free to reach out with any questions (info in bio).
We're also hiring for a bunch of other roles, across Engineering, Research, GTM, Marketing, Finance, Legal: https://jobs.ashbyhq.com/runway-ml?utm_source=kW6D9goed3
Tower is a Python-native serverless data platform. Data teams write plain Python, and we handle packaging, dependency resolution, scheduling, and execution across a serverless runtime built on Apache Iceberg. There's no clusters to manage, no YAML to write, no pipelines to rewrite to fit someone else's engine. If you've ever wanted your local Python script to just run in production at scale without a Databricks detour, that's the product.
We're a small, senior team split between London and Berlin. We've built a lot of tech: Custom run dispatch service, multi-region routing, storage based on Apache Iceberg, and the runtime itself, to name a few. This is deep systems work--things like scheduling, distributed execution, and performance. We're not gluing SaaS together.
Stack: Go and Rust for the platform, Python everywhere it matters, Kubernetes (EKS + Karpenter) on AWS, RDS Postgres, ElastiCache Redis, S3/Iceberg, WorkOS for auth.
Looking for:
* strong distributed-systems fundamentals
* comfort owning a system end to end
* taste for correctness under load
Bonus: data-platform, query-engine, or Iceberg experience; async Rust; Kubernetes internals.
Apply / questions: Email in bio — mention HN.
Recycleye and CP Group build recycling plants, and are forming a new team to provide data analytics and optimisation to recycling facility operators. There are optical sorters, AI powered airjets, AI robots and many different types of machines in a waste facility. The waste is constantly varying and the plant can be configured in thousands of ways to sort the material. This team will be collecting this data using different sensors and cameras.
We're looking for a data scientist with experience in deep analytics and statistical modelling to understand and visualise the data, and then and model the plant to spot issues before they impact operations, and identify optimistions that make a real difference. We use Clickhouse and Python or Go.
Any questions, feel free to email me at peter.fine@recycleye.com
We’re a quantitative research and technology firm bringing together world-class researchers and engineers to tackle complex problems in financial markets.
We're hiring engineers to help build the technology that underpins our research, from machine learning platforms and production systems to high-performance software and developer tooling.
Current opportunities include:
- Performance Engineering Manager: https://www.gresearch.com/vacancies/performance-engineering-...
- ML Performance Engineer: https://www.gresearch.com/vacancies/machine-learning-perform...
- Quant Developer: https://www.gresearch.com/vacancies/quantitative-developer/
- Machine Learning Engineer: https://www.gresearch.com/vacancies/machine-learning-enginee...
- Production Software Engineer: https://www.gresearch.com/vacancies/production-software-engi...
You’ll thrive if you have: - 8+ years in ML / Data Science / Research Engineering (Postdoc/Faculty can count towards this); - Strong Python and libraries such as Ray, numpy, PyTorch, and pandas; - Solid math/stats background; - Experience with modern dev practices & cloud technologies.
If you're interested, apply here: https://lnkd.in/dWhh_m28
Or if you'd like to see other roles at Flow Traders, please check our careers website: https://flowtraders.com/careers/
Longshot is at the cutting edge of sports betting modelling R&D and has been producing market beating models for over a decade.
We need senior engineers across platform and strategy in various roles. Excellent pay and benefits, flexible hybrid working, office in central London.
We operate a very high performance environment with high trust. Team small but growing. Sports knowledge optional. Passion and deep technical experience mandatory. Come and join the fun in the new world of sports betting markets.
Please check out our recruitment link here: https://apply.workable.com/longshot-systems-ltd/
Hiya is a Seattle-based voice security company whose Voice Intelligence Platform protects over 500 million users worldwide from spam, fraud, and deepfake scam calls while helping businesses build trust with customers through verified caller ID. We are hiring across engineering and product, please view the job descriptions below and apply using these links if you are interested.
Senior Software Engineer: https://jobs.ashbyhq.com/hiya/2de4d41b-a919-48c4-9a6c-e0d4f3...
Sr.Product Manager: https://jobs.ashbyhq.com/hiya/77d23447-28c6-47d8-ba17-937dcc...
Principal Product Manager: https://jobs.ashbyhq.com/hiya/a5b73022-e73e-47b7-ac24-911ed5...
What sucked the last time you rented a house or flat? Come and fix it.
OpenRent is force for good in an industry tarnished by rip-off agencies and one of the biggest UK websites by traffic. Enabled by an unrelenting focus on technology, we let more properties than any agency in the UK. In the last 12m we let over £50 billion worth of property, to over 8 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 Full-Stack Engineer | Equity | 110k+ (based on experience) + quarterly bonus
All roles visible here: https://www.openrent.co.uk/jobs
AI+pharma startup, and each person owns a program, from concept to clinic. (Further details omitted, still in stealth.) We hire anyone exceptional in AIxBio, we don't look to fill defined roles.
Founding team (including me! https://kidger.site) are ex-{Cradle, Google, Oxford, ETH}, backgrounds in protein language models, antibody design, JAX scientific ecosystem, neural differential equations.
"RenTech of pharma"!
:)
Antithesis is hiring FDEs: embed with customers, find the bugs no test caught, and turn what you learn into our next feature.
SF: https://jobs.ashbyhq.com/antithesis/41acb777-5f13-45e2-8dfa-... London: https://jobs.ashbyhq.com/antithesis/2741edbf-2312-4960-a7dd-... Metro DC: https://jobs.ashbyhq.com/antithesis/3db48e68-50bf-48be-9d84-...
ABOUT FRACTILE Fractile was founded in 2022 on the bet that, eventually, the world’s most capable AI systems would be limited in their impact by the amount of time they take to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts.
We’ve recently raised $220M from Founders Fund and Accel and the most important work lies ahead. Come and join the mission!
THE ROLE As a Software Engineer you will be a core part of our technical team working alongside the hardware, software and research teams to solve cutting-edge problems in AI hardware, ranging from verification to simulation, alongside the best of the best (DeepMind, Apple, Meta…).
ABOUT YOU 1) You have exceptional ability. We look for pivotal IC contributions that solved the hardest problems in big tech companies or hedge funds; competitive hackathons, International Olympiad medals, or rank highly in other competitions like advent of code
2. You are a top engineer. We are not looking for specific languages or technologies - you will be a master of several, you excel at algorithmic skills and solving problems logically in any programming language. And you are very comfortable learning new skills on the fly. You like to work in Python and C++
3. It’s likely you have several years of professional experience, but we will make exceptions for the right candidate
4. You want to work with the best. And you are excited to work in chips, solving the hardest problems at the frontier of AI
WHAT WE OFFER 1. Competitive compensation and meaningful equity 2. A very cool office with London's best views 3. Private medical insurance and pension benefits
If this sounds like you, ping carmen@fractile.ai
https://talkmachine.com/jobs/engineer
https://talkmachine.com/jobs/mobile
Hello. I'm the founder of Talk Machine, previously founded Citymapper. We had great success in posting here last time, and hired some members of our initial team. We have raised some additional financing now so would like to expand our team further.
We're building a consumer voice product over email. We believe in real human voice and conversation on an internet dominated by text. We've also added some amazing consumer voice agents that let you talk to technology, such as your email, calendar and news. Please try them out on mobile at https://talkmachine.com/apps or on web at https://talkmachine.com.
As you can imagine, our application process is unique. Just go to https://talkmachine.com/jobs/ and send us a voice note and we can begin talking, just like we met in person.
We are a remote company, funded with significant runway, can pay competitively and offer quality stock options.
You like: talking, consumer, voice, AI, small fast teams, building great products and technology.
You can also reach out to me personally at https://talkmachine.com/az.