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, meet the team lead, technical panel, meet the CEO.

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

Diffusion | All | SF Bay (Redwood City) | On site (office!), full-time Justin here, founder @ Diffusion. Formerly co-founder & CTO @ StrongDM.

We're finding the steepest gradients in the economy between model capability and deployed practice. A large part of that work is currently related to software factory construction.

All career stages welcome (including new grads). We are particularly interested in:

* Current/former founders

* High consequence / high criticality technical backgrounds

* Top decile communicators (writing, speech, video) who also make computer go brrr

Roles:

AI Eng - Factory Architect, AI Eng - Commercial, AI Eng - Compounding Leverage, Applied AI Researcher

Please expect satisfying, dignifying intensity.

Email hello@diffusion.io

Blockrotate | Senior Systems / Rust Engineer | Remote (US/EU timezones preferred) | Full-time | $130k - $170k + Equity

Blockrotate builds low-latency copy-trading and execution infrastructure for Polymarket and prediction markets.

Copy trading on prediction markets has strange market microstructure. Unlike deep perp DEXes (Binance, Hyperliquid), Polymarket orderbooks are bounded, often thin, and subject to severe adverse selection. When a high-volume leader buys, the book moves immediately. If followers lag by a few hundred milliseconds, or if a platform taxes every order with a 50bps fee, follower alpha drops to zero.

Most existing tools in this space either hit users with high per-trade taker fees or ask them to export and paste their master private key into a database. We took a different approach: isolated per-bot deposit wallets (non-custodial via EIP-1967/1271 proxies) and co-located autonomous Rust workers running delta-sync loops directly against the Polymarket CLOB.

Stack:

- Backend: Rust, Tokio, Axum, Protobuf over WebSockets, SQLite (WAL mode)

- Trading Engine: Custom Polymarket CLOB & Data API clients, EIP-712 signing, dynamic slippage ladders, momentum filters, circuit breakers

- Frontend: Next.js 16, React 19, TypeScript, Tailwind CSS

What you’d actually work on:

- Squeezing latency out of the execution hot path (delta position calculation, order placement, nonce handling, fill verification).

- Building better execution protection: momentum filters to dodge toxic order flow, fill stabilization windows, and handling thin book liquidity without moving the market against yourself.

- Scaling worker orchestration: our C2 server talks Protobuf to distributed bot workers with monotonic sequence IDs and autonomous reconnect failover. As bot volume scales, we need to keep state reconciliation bulletproof.

- Investigating and exploiting prediction market quirks (rebate structures, orderbook snapshotting, MEV/relayer bottlenecks).

What we look for:

- Strong async Rust experience (Tokio, concurrency, practical memory management).

- Experience dealing with websockets, exchange orderbooks, or trading infrastructure

shoot an email to jobs@blockrotate.com and tell us why you would be a good fit for us.

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

India

Aloe | AI Research + AI Engineering roles | ONSITE Vancouver, BC, Canada | Full-time

Aloe is the AI lab for justified belief. We work on research and products that bring epistemic intelligence to AI – compound systems that know why they believe what they do, and what would cause that belief to change. Aloe learns how humans come to answers we rely on: recognizing what's at stake in a decision, understanding evidence and unknowns, working through hard questions with rigor, and learning from the sparse data of experience.

Please read the job description and include in your outreach why you fit not just the role but also our culture. We strive to be Level 5 humans, co-creating a deliberately developmental atmosphere. We get a lot of applications – showing your personality will help you stand out. We have to want to work with you, after all!

https://aloe.inc/careers

The future we’re building for:

- Commoditize access to expertise, capability, and AI’s economic promise for both businesses and end-users

- Make new discoveries, products, and experiences possible at speeds unbound from human performance

- Defend against negligent or malicious use of AI with internal governance and risk evaluation at the foundation

- Invert the extraction economy with AI that respects human cognition instead of exploiting it

Location: Istanbul, Türkiye Remote: Yes Willing to relocate: Yes Technologies: C/C++, Rust, Python, Linux, RTOS, TCP/IP, eBPF/XDP, WebRTC, UWB/BLE, embedded/IoT & mesh-connected devices, PostgreSQL, Docker, AI/LLM systems

Résumé / Portfolio: https://msakg.com GitHub: https://github.com/imsakg LinkedIn: https://linkedin.com/in/msakg Email: contact@msakg.com

Lead AI Agent Software Engineer focused on real-time, performance-critical systems across AI, networking, embedded devices, and production infrastructure.

My background sits at the intersection of software and the physical world:

• Currently leading architecture and production hardening of a real-time multimodal AI agent platform — streaming STT → LLM/tools → TTS, WebRTC, asyncio, long-lived state/memory, retrieval, observability, failure handling, cancellation, backpressure, and latency-sensitive execution.

• Previously built real-time networking software for aerial systems using Rust, Linux, eBPF/XDP and IEEE 802.1 TSN concepts, including reliability mechanisms where deterministic behavior and low fast-path overhead matter.

• Earlier developed C/C++ bare-metal and RTOS firmware for access-control/security and embedded/IoT devices — TCP/IP, UART/I2C/SPI, RS232/RS485, Modbus, secure device communication, UWB/BLE localization, sensors, relays and constrained hardware.

I’m most interested in difficult engineering problems where timing, reliability, networking, hardware constraints, and user-facing behavior meet: mission/performance-critical software, real-time systems, embedded/IoT, access control, UWB, distributed device systems, AI infrastructure, backend/platform engineering, and systems software.

I enjoy owning systems end-to-end — architecture, implementation, debugging, benchmarking, deployment, production incidents, and the less glamorous failure modes that only appear in real environments.

I’m looking for a strong engineering team tackling genuinely hard technical problems. Open to Lead/Senior Software, Systems, Embedded, Platform, Backend, Real-Time AI, or similarly hands-on engineering roles.

If you're building something where milliseconds, reliability, hardware, networks, or production correctness actually matter, I'd be very happy to talk.

Baton | San Francisco, CA (Hybrid) | Full-Time

Baton (baton.io) is Ryder's in-house product development group focused on harnessing emerging technologies to redefine transportation and logistics. With $10B in freight under management, our technology reaches every part of the U.S. economy. We design and ship category-defining software that enables Ryder and its 50,000+ customers—including some of the world's most well-known brands—to plan and execute freight intelligently, efficiently, and cost-effectively. Our work includes everything from customer-facing software to the data platform that will power the next era of innovation at Ryder.

Baton's mission: enable supply chain on autopilot.

Ryder acquired Baton in 2022 to power its next wave of digital products. We operate at startup speed, with Fortune 500 reach. If you have a passion for solving complex problems and creating impact for the engine of the American economy, you'll love it here.

Current openings at Baton:

Staff Software Engineer - Infrastructure, Data Platform (hybrid, $260,000 - $350,000): https://grnh.se/55wbfa9g7us

Software Engineer - Data Platform (hybrid, $162,000 - $216,000): https://grnh.se/8pm4cytg7us

Software Engineer - Infrastructure, Data Platform (hybrid, $162,000 - $216,000): https://grnh.se/wb558ncz7us

Senior Product Manager, Machine Learning (hybrid, $190,000 - $240,000): https://grnh.se/537yusl37us

Software Engineer, MLOps - Machine Learning (hybrid, $162,000 - $216,000): https://grnh.se/770pgzv17us

Software Engineer - Full Stack, Product Engineering (hybrid, $150,000 - $200,000): https://grnh.se/zjf8nfrb7us

Staff Technical Recruiter, Talent Lead (hybrid, $200,000 - $250,000): https://grnh.se/h6wcpsh77us

VALIS (Valis Insights) | Software Engineer, new product line | REMOTE (US, East Coast hours) | Full-time | $125k-$155k + equity

I'm Caleb, co-founder/CTO. VALIS builds data products for scrap metal recyclers. Our product images, weighs, and classifies scrap metal, and our platform turns that into actionable quality analytics to improve physical ops at plants across the US. Recycled metal takes a fraction of the energy of mined metal, and better data means more of it gets recovered.

We're hiring an engineer to build our next product line: a production tracking and analytics platform for recycling plants, extended from our existing product. We're a small team (<10 ppl). What you'd work on (ideate, build, deploy, own):

- Modeling a complex (and intellectually stimulating) physical process

- Agentic features that dig through production and quality data, surface trends, flag anomalies, and notify the right people

- Working directly with customers: regular calls with operators and plant managers, plus a few site visits a year

You should have 3+ YoE, strong data modeling fundamentals, and enjoy owning ambiguous problems end to end. We care more about how you think than what exactly you've used. Recycling, ERP/MES, or physical ops software experience is a plus.

Our stack: React/TypeScript, C#/.NET, PostgreSQL, AWS.

US work authorization required; no sponsorship.

Apply (read the whole JD, mention HackerNews): https://apply.workable.com/valis-insights-1/j/9D0C64C055 Questions: caleb[dot]ralphs[at]valisinsights[dot]com

Tech Mahindra’s Cloud Advisory division is hiring engineers (4+YoE) and cloud solution architects (8+YoE) to help enterprises modernize and operate at scale on AWS, Azure, and GCP. We value folks with a strong software development background who have grown into cloud and platform engineering roles. Our work spans cloud application modernization, platform engineering, DevOps, SRE, SecOps, and FinOps. Any experience with using AI to improve cloud platforms, DevOps or operations is a plus.

We’re hiring across geographies (India, Mexico, Canada, USA).

Roles include: Cloud Engineers, Platform/DevOps/SRE, Cloud Architects, DevSecOps, Tech Leads, and Engineering Managers.

Apply: Send your resume to cprabala@techmahindra.com (mention HN – Cloud Advisory).

Splash Tech | DevOps Mid/Senior | Remote (LATAM and EU) | Full Time | https://splash.tech/

We're a small UK-based free-to-play gaming company with a distributed team, growing fast after recent success and scaling our backend platform. We’re looking for a DevOps engineer with 5+ years of experience.

Most of the work is AWS-focused. You should have hands-on experience with:

- AWS, particularly EKS, EC2, Application Load Balancers, RDS, and IAM. - Terraform and managing infrastructure as code. - Kubernetes, including troubleshooting workloads and cluster issues. - CI/CD and GitOps workflows using GitHub Actions and Flux. - Monitoring, alerting, and tracing with tools such as Grafana, Prometheus, Alertmanager, Jaeger, and OpenTelemetry. - DNS, TLS, and Cloudflare.

Strong AWS networking knowledge, including VPC design, routing, private connectivity, and troubleshooting is highly desirable.

Our stack includes AWS, Kubernetes (EKS), PostgreSQL, Trino, Flux, Terraform, and GitHub Actions. You don’t need to know every tool already, but you should be comfortable learning what the job requires.

You should be comfortable owning work from identifying a problem and proposing a solution through implementation, rollout, documentation, and ongoing operation.

You should be comfortable investigating issues across applications, Kubernetes, networking, and databases. We also value clear thinking and communication: you should be able to explain your ideas and trade-offs using simple architecture or flow diagrams—just boxes and lines, nothing formal.

To apply, email lucas[at]splash.tech with the subject “DevOps Engineer 2026”. Include a brief introduction and a link to a repository or project that demonstrates your infrastructure or automation work. If you don’t have work you can share, we may ask you to complete a small practical test.

KSC Trading | Remote | Full-Time | Senior Backend Software Engineer | $200k to $250k USD Total Compensation + Benefits KSC Trading is a proprietary algorithmic trading firm founded in 2020. The company creates software to engage in automated trading in sports and prediction markets. The focus has been on statistical arbitrage and liquidity provision. We are currently a team of two, expecting to grow to a team of six over the next year.

The role would include maintaining and expanding the trading infrastructure. Example projects would be to integrate new exchanges and data sources, normalize market data feeds, optimize backtest performance, and build systems to monitor and analyze live trading. The current tech stack is based on Java, Google Cloud Platform, and Postgres. Experience with the tech stack is not expected.

Location: Remote with at least 4 hours overlap with US east coast working hours.

The company donates 20% of its profits. To apply reach out at hiring@ksctrading.com with your resume.

Flow Traders | Research Engineer | Hong Kong | Full Time | Visa | Relocation Flow Traders is a leading proprietary trading firm with an entrepreneurial and innovative Tech culture at the heart of its business. We are looking for Research Engineers in our Hong Kong office. Join us build and scale the research framework behind our systematic trading models. You’ll work closely with Quantitative Researchers, drive end‑to‑end ML pipelines, and shape global standards for data‑driven model development. Research Engineers have joint responsibility for conducting research and delivering models. 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://www.flowtraders.com/careers/job-description/7431246

Flow Traders | C++ Senior Software Engineer | Hong Kong | Full Time | Visa | Relocation We are looking for a Senior C++ Software Engineer, you'll help design and optimize next-generation market data and execution platforms powering systematic trading across hundreds of venues. The role covers high performance market data ingestion and order execution, building and optimizing trading systems. To succeed you will need to have: - 5+ years of C++ experience in HFT/ financial sector -Strong knowledge in one or more APAC markets If you are interested, apply here: https://www.flowtraders.com/careers/job-description/8212740

Or if you'd like to see other roles at Flow Traders, please check our careers website: https://flowtraders.com/careers/

Charge Robotics | Multiple Roles | Full-time | Onsite | SF Bay Area

Hi HN! We’re a YC-backed, Series-A startup building robots that build large-scale solar farms.

We just published a new video of our production system here! https://youtu.be/ix0oMgqTfko

It turns out that construction companies literally can't build solar fast enough, so what we're doing is a crucial part of switching the grid over to renewable generation.

You’ll be a key contributor, helping bring our next generation of mobile solar factory to life.

Come work with us if you love:

* Fast-paced prototype development with software and hardware components

* Making a positive climate impact through your work

* Hacking on massive construction equipment!

Lots of software and hardware jobs at the following link: https://jobs.ashbyhq.com/charge-robotics

Please also feel free to reach out to me directly at max@chargerobotics.com

Vohuman - Agentastic | San Francisco, Onsite | Full time | $200k+ USD + equity

Hey folks, i'm the founder. Vohuman is an early stage startup focused on building aligned collective intelligence. I'm looking to hire MoTS roles, with specialization in Agentic (obviously) and RL (or both).

You can check out our product here: agentastic.dev and agentastic.com

agentastic.ai/careers

You can email me at my-last-name@agentastic.ai

Reddit | Senior and Staff Full-stack Engineers | REMOTE(US) | Full Time

Reddit's Developer Platform team (my team) is hiring! Come work with us on interesting scale and infrastructure problems, developer experience, and coming up with creative ways to let 3p devs modify Reddit. It's a fun team with a lot of autonomy, collaborative people, and a great product with a lot of places it can go.

This listing is for our Staff role, but drop me a note at andrew.gunsch@reddit.com because we're hiring for other levels as well and I'll get ya routed. https://job-boards.greenhouse.io/reddit/jobs/8180636

Certara | Sr. DevOps Engineer | REMOTE (US, Budapest) | Full Time

Certara makes software that life sciences companies use to develop drugs and get them approved. Our products model how drugs behave in the body (biosimulation) and validate clinical trial data for submission to regulators like the FDA.

We’re hiring a DevOps engineer to help grow the infrastructure behind our cloud products. You’ll work on:

CI/CD pipelines: CircleCI, Jenkins Cloud infra: AWS, Terraform, Chef Security/compliance: ISO 27001, GxP validation

US Listing: https://careers.certara.com/jobs/2614/job

Hungary: https://careers.certara.com/jobs/2492/job

We also have several engineering and product management roles.

Justworks | NYC + Toronto (most roles require 2+ days in office) | Full-time | Salary + equity in every offer | https://www.justworks.com/careers

Justworks is a PEO and HR platform for small businesses. We run payroll, benefits, compliance and HR for small businesses so that they can focus on growing their own business.

The engineering problems are the unglamorous, high-stakes kind: pay people correctly, compute and withhold the right taxes, and keep sensitive customer data accurate and on time. If a pipeline is wrong, someone's paycheck is wrong.

Some roles we're hiring for (see the careers page for the full list + links):

- Senior Software Engineer (many): https://boards.greenhouse.io/justworks/jobs/8179751?gh_jid=8...

- Engineering Managers, DevSecOps, Applied AI, etc.

- Senior Data Scientists, Senior Data Science Managers

- Directors/GMs of Product, GPMs, Senior PMs, etc.

- Marketing, Sales, Ops, Legal, Customer Success, etc.

Salary ranges are in each posting. Apply at https://www.justworks.com/careers

Rapiscan Systems and its parent company OSI are hiring for service techs.

Mechanize | San Francisco, CA (Onsite) | Junior SWE ($300k + equity + bonus), SWE ($350k + equity + bonus), Research Engineer, Alignment ($300k-$400k + equity + bonus)

Applying takes <2 min: https://www.mechanize.work/apply/

We build environments that frontier AI labs use to train their models to do real-world software engineering. We have more demand than we can keep up with, so we're hiring fast.