Zo Computer | Systems Engineer, Product Engineer | NYC or SF | Full-time

Imagine having an entire software company working just for you – housing all your personal data, proactively working in the background doing chores, building apps, and organizing information to support your life. It'll work around the clock, interact with people and businesses to make you more organized, capable, and creative.

We're building a new category of personal computing device – a personal cloud, built for personal agents (and the agentic internet to come). Our mission is to make private cloud computing accessible to everyone, by designing enduring abstractions and flexible infrastructure for consumers and their agents.

Systems Engineer: You should be proficient in Python, TypeScript, IaC, etc. and be an expert in distributed systems, storage/databases, networking, and containerization.

Product Engineer: You must be a generalist, and should be proficient in Python, TypeScript, coding with AI, and building AI products. You must have great taste in system, API, and UX design. You must have operating experience in early-stage startups. Former founders are preferred.

https://zo.computer/careers

Pennylane | Machine Learning Manager | Remote or Hybrid from Paris | Full-time

We aim to become the most beloved financial Operating System of French SMEs and Accounting Firms (and soon, European ones). We help entrepreneurs rid themselves of time-consuming tasks related to accounting and finance while providing them with access to key financial information to assist in making the best decisions for their business.

Machine Learning is core to the most-loved features in our products. The ML team is growing and we are hiring a second ML Manager.

As a Machine Learning Manager, you will lead a team of Machine Learning Engineers & Data Engineers (5 people), inside the Machine Learning & AI function (15+ people) in our Data department (50+ people). - You will contribute technically to the design and implementation of machine learning solutions and tools across the entire ML lifecycle, from model training and tuning to deployment, inference, experimentation and monitoring. - You will collaborate with Product Managers to ensure the highest impact and quality of machine learning work for our users, as well as the best atmosphere and motivation in the team. - You will grow your team continuously, and team up with other managers to set up the right culture and processes to enable people. - You will work closely with data engineers and software engineers to quickly deploy end-to-end solutions with a direct impact on our users, and improve our machine learning ecosystem.

Apply here: https://jobs.lever.co/pennylane/f5730a1c-ebf2-4965-a263-4812...

Edit: many other open positions https://jobs.lever.co/pennylane

Newbuilds | Remote Senior Ruby on Rails Developer | Remote (Europe) | Full-time

Newbuilds is hiring a Senior Ruby on Rails Developer to help scale a widely used proptech marketing platform, a Norway-based proptech company powering automated campaigns and data-driven workflows across 17+ countries.

You’ll work on backend architecture, improve performance and scalability, build integrations with external APIs/CRMs, and influence technical direction with ownership over your code. This role is remote-first with flexible work and competitive senior-level compensation.

Remote (EU timezone friendly) | We work via B2B, or employment in Norway or Germany

Modern stack: PostgreSQL, Sidekiq, RabbitMQ, AWS, Docker, GraphQL

Join a low-ego engineering team with real product impact

Apply or share with someone who’d love working on complex backend challenges: https://careers.staffer.ai/jobs/7247377-remote-senior-ruby-o...

CrazyGames | https://about.crazygames.com/ | REMOTE (in Europe) | Full-time | Multiple roles

With recent technologies such as WebGPU and WebAssembly, the browser is quickly becoming a powerful gaming platform. High-quality 3D graphics and near-native level performance are now possible without the need for downloads, apps, or platform-specific development. Our browser games platform is already reaching 50 million people per month. We are self-funded, profitable, remote-first, and fast-growing.

We are currently looking for multiple people to bring our engineering, product, data, and adops to the next level.

Please note that we're looking for people who can work on a European timezone and are ideally based in Europe (which includes the UK for those in doubt).

* Product Engineer: https://crazygames.recruitee.com/o/remote-product-engineer-3

* Product Manager (Game Experience): https://crazygames.recruitee.com/o/remote-product-manager-ga...

* Product Director (Monetization): https://crazygames.recruitee.com/o/remote-product-director-m...

* Programmatic Manager: https://crazygames.recruitee.com/o/programmatic-manager

* Product Marketing Manager: https://crazygames.recruitee.com/o/remote-product-marketing-...

* Graphic Designer (Marketing): https://crazygames.recruitee.com/o/remote-graphic-designer-m...

LiveEO | Senior ML Engineer | Berlin, Germany | Hybrid | Full-time

LiveEO leverages high-resolution satellite imagery and AI to provide actionable insights across industries—like protecting power grids, monitoring critical infrastructure, and ensuring deforestation compliance.

We are looking for a Senior ML Engineer to build and scale multitemporal, multimodal computer vision models for Earth observation. You’ll combine optical and Synthetic Aperture Radar (SAR) data into robust representations. This role is a true balance of applied research and engineering: you’ll own the full ML R&D lifecycle from data standardization and SOTA model development to rigorous evaluation and production-grade delivery.

Tech Stack: Python, PyTorch/Lightning, Databricks, MLflow, Ray, Prefect, AWS, Geospatial stack (GDAL, Rasterio, GeoPandas, STAC), PostgreSQL.

What we're looking for:

* Strong Python engineering and deep PyTorch/Lightning experience.

* Proven experience implementing and training deep learning models at scale.

* Hands-on experience with satellite imagery (optical & SAR strongly preferred).

* Strong CV fundamentals (representation learning, supervision, evaluation) and ML experimentation (Databricks/MLflow).

* Pragmatic mindset: you can take SOTA papers to validated baselines and production under real-world constraints.

Must be living in or willing to relocate to Berlin. This role requires German/European citizenship due to legal/regulatory requirements.

(Bonus points for experience with large-scale geospatial foundation models, VLMs, or distributed compute with Ray).

Apply here: https://liveeo-gmbh.jobs.personio.de/job/2540514

Glitch is building the AI agent for Advertising

Glitch creates Ad Campaigns 10x faster than a human that perform 5 times better. Even if the human uses AI.

We need Engineers who want to tackle hard problems like treating the real world as context for LLMs, understanding markets in a few seconds, and dealing with the complex ML algorithms that underlie digital advertising.

We are a team of 16 and a mix of Startup Hustlers and ex-Google Ads Engineers. We've raised Seed and are doubling our customer base every 6 weeks.

We love Agentic Coders and want people who are building not for today but for what the next model can do. You wont build the app you will build the systems that build the app.

Bonus points if you think Agents can solve design and frontend UI.

Email me @ kingsley @ glitchads.ai

Checkly | Multiple Roles | REMOTE | Full time | https://www.checklyhq.com/

Checkly helps engineers build reliable products by unifying testing, monitoring and observability. OpenTelemetry, Playwright, and Monitoring as Code are our foundation for unifying performance and reliability. In 2024, we raised $20M in Series B funding from Balderton, CRV, and Accel to take things to the next level.

-Senior Software Engineer - Infrastructure (Remote, UTC-3 to UTC+3)

-Staff Software Engineer - Infrastructure (Remote, UTC-3 to UTC+3)

-Engineering Manager - Infrastructure (Remote, UTC-3 to UTC+3)

-Enterprise Account Executive (Remote, USA - ET, CT, MT)

See the full descriptions and apply here (and mention HN): https://jobs.ashbyhq.com/checkly?utm_source=hn

Climatealigned | Onsite | London

We've spent the last two years making climate finance data at a fraction of the time and cost using AI. We started pre GPT and have continued to evolve and rebuild our stack with the times. These days we are fully agentic, powered by opus/haiku using python/js as best fits the job, but we ride the wave and aren't attached to the past. We are a small, focused, in-person, and technically capable team with deep industry connections.

We are looking for an early career builder to take ownership of end to end data creation, and who can stay on their toes with rapidly changing tech stack and ways of working as the models continue to evolve.

Reach out to our CEO aleksi[at]climatealigned[dot]co to discuss, or drop me a line (founding engineer)

Check some of our past work at https://climatealigned.co or touch base with any of the team with questions on LI

telli is hiring engineers & designers [on-site, Berlin] - https://hi.telli.com/join-us

Arenko (energy transition/batteries and renewables) | London, UK | 2x/week in office

We work on industrial/grid-scale batteries and other renewable generation: monitoring, managing and trading them on multiple energy markets. Batteries like these: https://en.wikipedia.org/wiki/Battery_energy_storage_system Everyone starting from the C-suite is passionate about addressing climate change and transitioning to renewable energy!

We're a small team of 7 backend engineers atm (other teams have Ops, FE and DS roles). We have paying customers and have been around for 10 years. Our current goal is to make the platform more scalable to deal with the customer growth and move to new markets. The biggest challenge is understanding how the various energy markets and energy storage in general work and then translating that to reliable working software.

We're currently looking for a few Senior Backend Engineers (Go), a Senior Data Engineer and a Senior Infrastructure Engineer. Our office is in London Blackfriars and most engineers come in about 2 days a week, but this is flexible.

Feel free to message me with any questions or apply directly:

https://arenko.bamboohr.com/careers?source=hn

https://arenko.group/careers/

CLASSIC.COM | Software Engineer (Elixir) | Remote (Eastern Timezone) | Full Time | https://www.classic.com

We are building CLASSIC.COM a comprehensive platform for classic, collectible, and rare automobiles. As a leader in our vertical, our platform serves millions of users, and we are seeking two Software Engineers to help take our systems to the next level.

The Software Engineer (Elixir) will work in our Experience Team, which builds the complete experience for our customers. You'll use Phoenix + LiveView to build fast, modern, and efficient user experiences, and help continue to roll out Elixir to the rest of the organization. For more details or to apply, reach out to me at luke @ the company domain.

If you reach out from Hacker News, please mention that in the subject line or email body!

Both roles are full remote, we do have flexibility regarding country, however there may be some countries we're not equipped to hire in. Though these roles are full time, we're also available to do contract type roles if necessary. Not interested in any recruitment help.

Featurebase | Full-stack Product Engineer | REMOTE (EU) | Full-time

Modern customers support & product feedback platform powering thousands of teams, including Lovable, Raycast, and n8n. Fully bootstrapped, profitable, and growing fast.

We’re building a full customer-facing suite where teams can handle their customer support, feedback prioritization, and product updates - all in one place.

We’re looking for a full-stack product engineer to own and ship core product features end-to-end, with a direct impact on Featurebase’s future.

Stack: NextJS + Typescript for the frontend, Node.js for the backend, MongoDB, Redis.

If you like small teams, autonomy, and shipping meaningful product work, we’d love to have you on board!

Apply here (we read every submission): https://go.featurebase.app/careers

Journee | Berlin, Germany, Europe | REMOTE (CET +/- 2h) | Full-time | https://journee.ai & https://ojin.ai/

==========

Journee is a technology startup founded in 2020. Our in-house low-latency streaming technology and GPU fleet orchestration systems are the engines behind our award-winning work with brands such as BMW, H&M, and Siemens.

We are now building and launching Ojin (https://ojin.ai/), a real-time generative AI platform for developers. Ojin provides the APIs and inference infrastructure for developers to build and scale interactive applications and AI agents. For this new venture, we are building a small, ambitious team of highly talented individuals and are hiring for the following position:

* Senior Product Engineer

* VP of Technology

Our tech stack: TypeScript, React, Python, PostgreSQL, WebRTC, AWS, Infrastructure as Code, Unreal Engine

Apply here: https://job-boards.eu.greenhouse.io/journee

Refurbed | Senior Data Scientist | Austria | EU remote | full-time

We're looking for a senior data scientist with marketplace experience for our very international remote first company in sustainable consumption.

https://www.refurbed.de/jobs/?gh_jid=4756814101

Modash.io | Multiple roles | Multiple locations | Full-time | Remote

• Modash is an end-to-end influencer marketing platform for Shopify stores.

• We help every creator earn a living.

• Tallinn is home. Europe is our lab. Canada joins the frontlines.

• 70+ person team, raised €11M in Series A funding, ARR growing 2x YoY.

• Millions paid out to creators to date.

—

Senior Product Engineer (Remote, Europe) https://apply.workable.com/modash/j/C1507B65C3/

Senior Backend Engineer (Remote, Europe) https://apply.workable.com/modash/j/D4FA5BA3E6/

Senior Machine Learning Engineer – LLM & Reinforcement Learning (m/f/d) €160.000+ | Full-Time | ONSITE

As a Senior Machine Learning Engineer at warmwind your work will drive our next-gen AI models, shaping the future of machine intelligence beyond traditional paradigms. You'll work with massive compute clusters (500+ H100 GPUs) and cutting-edge reinforcement learning techniques to create highly efficient, scalable, and groundbreaking AI systems.

Responsibilities: Design, train, and optimize Large Language Models (LLMs) from scratch Scale distributed training on massive GPU clusters (500+ H100 GPUs) Implement advanced reinforcement learning techniques (RLHF, adversarial self-play, real-time control) Develop high-performance architectures for multi-modal AI systems Build simulation environments for RL-based AI agents Optimize inference speed and efficiency for real-world deployment

Your Profile: Deep expertise in LLMs – you’ve built and trained large-scale models yourself Experience with large-scale distributed training on 500+ GPU superclusters Deep understanding of reinforcement learning, neural network optimization, and self-play methods Expert in PyTorch, TensorFlow, JAX & low-level optimization techniques (CUDA, Triton, DeepSpeed, etc.) Familiarity with high-performance computing (HPC, NVLink, InfiniBand, parallel computing) Strong publication track record in AI/ML research is a plus Relocation to Jena, Germany after initial onboarding

Language requirements: German or English

https://warmwind.com/careers/senior-machine-learning-enginee...

TantumPay | Java Developer / Web & React Native Developer | Europe (CET) | Remote | Full Time

We're a FinTech company reinventing high-risk-market payments with an integrated digital identity layer. Our team is expanding, and we are looking for a Senior Java Backend Developer and a Senior Web/React Native Developer.

We are fully remote, and we are looking for someone in the same timezone.

Backend: https://tantumpay.com/en/jobs/senior-java-backend-developer/ Frontend: https://tantumpay.com/en/jobs/mid-senior-web-react-native-de...

EnigmoFi | DevOps / SRE (Cloud & Infrastructure) | Remote | $192k + bonus

EnigmoFi is a crypto financial infrastructure startup building secure, scalable digital finance systems.

We’re hiring a senior DevOps / SRE to own and scale production cloud infrastructure.

Stack: AWS (primary), Kubernetes (EKS), Docker, Terraform (IaC), GitHub Actions, Prometheus/Grafana, Linux.

You’ll drive infrastructure automation, CI/CD, monitoring, incident response, and security best practices across environments.

Strong fit if you’ve operated high-availability infrastructure in crypto or digital asset environments (Coinbase, Paxos, Circle, Binance, OKX, Gemini, BitGo, Gnosis, The Graph, etc.).

mail: bayonleafolabi@enigmofi.com

Avanti | Gameplay Developer / Unreal Engine Developer | Stockholm, Sweden | Onsite/Hybrid | Full Time

Now we are looking for a Gameplay Developer / Unreal Engine Developer who wants to build the systems behind this experience.

This is not a feature-by-feature implementation role. It is a systems role.

You will work at the core of our real-time platform, designing and developing gameplay systems in Unreal Engine 5, using C++ and advanced Blueprints to create scalable, performance-optimized logic.

You will collaborate closely with animators and technical artists to ensure characters, props and animation behave seamlessly inside the engine.

The tech stack

    Unreal Engine 5
    C++
    Blueprint
    motion capture integration
    GCP

You have solid experience working with Unreal Engine and feel comfortable in both C++ and Blueprint architecture. You understand gameplay systems, animation logic and performance constraints.

We value accountability, curiosity and clarity.

Apply here: https://nordictechjobs.com/jobs/UMWwUb5WaZ

AI startup ILLUCIO正在寻找一位 Full-stack Engineer（全栈工程师） 我们两位创始人都是 NUS 校友，欢迎现场约coffee chat： 船长（Captain）： NUS 校友，大三休学全职创业中。AI 时代商业、产品与增长的连接者。两个月自学备考进入 NUS 哲学系，曾在 Accenture（埃森哲） 与 P&G（宝洁） 从事技术相关工作。近期 base 北京/上海。 陈小爷（Judy）：哈工大计算机本科 + NUS 理学硕士。AI 时代产品、技术与增长的连接者。小红书同名AI博主。近期base新加坡。 我们共同相信：学习、创造、品味与真诚。 Illucio 是一款注重心流体验而非简单提效的 AI 学习工具：我们用 AI 革新文本形式，帮助任何人更深、更全然地理解任何文本。 1.0 从哲学阅读的垂类出发，上线三天内用户量破 2000+。 2.0 正在迭代到通用学习场景，主要面向 海外 ToC 市场。 目前我们已经有：可用的产品形态、一个 6000+ 粉丝的产品账号、一些付费用户，以及融资资金。 我们正在寻找一位自我迭代速度极快的全栈工程师，把这些洞察与体验落地为一套安全、稳固、可规模化的系统。 如果你想加入的不是一份工作，而是一场真正的创造 —— 欢迎登船。 更多消息可关注： 小红书：ILLUCIO 公众号：乌卡船长 官网（电脑访问）：ILLUCIO.co