Sphinx Defense | Software Engineering | Remote (US Only) | https://www.sphinxdefense.com

Sphinx Defense builds software to solve complex national security problems for America and its allies. Founded by engineers and technologists with deep experience across commercial and defense technology, we're building a vehicle-agnostic communication infrastructure to enable satellite operators to securely utilize antenna networks and maneuver satellites in real-time. We're bootstrapped, profitable, and growing aggressively. To learn more about who we are, our engineering culture, and whether this is the right place for you, https://sphinxdefense.com/ Our current openings are: Senior. Backend Engineer - Colorado Springs, CO: https://grnh.se/auntb4us8us Senior. Backend Engineer - Remote: https://grnh.se/kp0xwi9b8us Backend Engineer - Colorado Springs, CO: https://grnh.se/z0jox39h8us Backend Engineer - Remote: https://grnh.se/bd3zrpcg8us Chief Engineer - Chantilly, VA: https://grnh.se/rbw9gsyl8us Chief Engineer - Colorado Springs, CO: https://grnh.se/ysbgny5x8us Chief Engineer - El Segundo, CA: https://grnh.se/k6ny69og8us Chief Engineer - Seal Beach, CA: https://grnh.se/e0dp9r0l8us Control Account Manager: Remote: https://grnh.se/ag280g7e8us Cybersecurity Lead - Information System Security Manager (ISSM) - Chantilly, VA: https://grnh.se/dcbx6n5s8us Cybersecurity Lead - Information System Security Manager (ISSM), Colorado Springs, CO: https://grnh.se/93m5yna88us DevOps Engineer - Remote: https://grnh.se/w6nfmsl18us DevOps Engineer - Colorado Springs, CO: https://grnh.se/ediup2jj8us Infrastructure Security Engineer - Remote: https://grnh.se/nbd1nsf98us Senior DevOps Engineer - Colorado Springs, CO: https://grnh.se/9ufr3c4s8us Software Systems Architect - Chantilly, VA: https://grnh.se/rzuhym5f8us Software Systems Architect - Colorado Springs, CO: https://grnh.se/sp6q2wjy8us Software Systems Architect - El Segundo, CA: https://grnh.se/ev0qd1kb8us Technical Program Manager - Chantilly, VA: https://grnh.se/xq1zpezj8us Technical Program Manager - Colorado Springs, CO: https://grnh.se/wk6515kq8us Technical Program Manager - El Segundo, CA: https://grnh.se/slbopfb58us Senior Program Manager - Chantilly, VA: https://grnh.se/9cadlgwu8us Senior Program Manager- Colorado Springs, CO: https://grnh.se/ualgpm3f8us Senior Program Manager- El Segundo, CA: https://grnh.se/msh8t00e8us IT Specialist - Colorado Springs, CO: https://grnh.se/3v6g0mnn8us

Preferred Networks | Tokyo or Remote in Japan | Full-time | https://www.preferred.jp/en

Preferred Networks is an AI company based in Tokyo working across the stack, from AI chips and computing infrastructure to LLMs and products. You may already know us indirectly if you've used software we've built, such as Optuna or CuPy (or Chainer, back in the day).

We are designing in-house chips (MN-Core series: https://mn-core.com/) and training LLMs (PLaMo series: https://huggingface.co/pfnet), and our team is actively hiring for two roles related to these endeavors:

- MN-Core LLM Serving Engine Engineer: Build software infrastructure to serve LLMs using our upcoming inference accelerator, MN-Core L1000. [Apply here: https://open.talentio.com/r/1/c/preferred/pages/121580]

- LLM Inference Optimization Engineer: Improve the inference engine powering our API service and maintain PLaMo implementations in open source projects such as vLLM. [Apply here: https://open.talentio.com/r/1/c/preferred/pages/119173]

Both roles require relocation to Japan. We are happy to provide visa and relocation support.

Portless | AI Engineer | REMOTE (North America only) | Full-time | $180K-$230K + equity

Founding AI engineer seat. AI adoption at Portless today is basic (decks, spreadsheets, call summaries, a bit of vibe-coded dashboards) — no real end-to-end agentic workflows yet. You'll build the AI infrastructure: shipping high-impact agentic workflows yourself, and building reusable "Lego blocks" (APIs, MCP tools, docs) so any team can build their own. Cross-functional, high-leverage role touching every team, working directly with leadership. Example first project: an agent for inbound invoice questions — understands the question, pulls the right invoice, drafts a context-aware reply for a teammate to click-send, turning an hour of work into ~30 seconds.

Stack: Python, TypeScript, LLM APIs (Anthropic, OpenAI), MCP, RAG, vector databases, agent orchestration, Cursor/Claude Code. Requirements: Must be based in North America. 3+ years software engineering with 1-2+ years building production AI systems, 10+ real agentic/LLM workflows shipped end-to-end, platform mindset (built tools/infra for others, not just yourself), strong Python and/or TypeScript across backend and lightweight frontend, relevant sector background (e-commerce, 3PL, logistics, or comparable B2B).

Nice to have: RAG pipelines, vector DBs, multi-step tool-use/agent orchestration, evals frameworks. Full JD + Apply: https://uctalent.io/referral/Huynh_Nhu_Bao_Nhan221138/erKmmo...

Spacelift | Remote (Europe) | Full-time | Senior Software Engineer | $80k-$110k+ (can go higher)

We're a VC-funded startup (recently raised $51M Series C) building an infrastructure orchestrator and collaborative management platform for Infrastructure-as-Code – from OpenTofu, Terraform, Terragrunt, CloudFormation, Pulumi, Kubernetes, to Ansible.

On the backend we're using 100% Go with AWS primitives. We're looking for backend developers who like doing DevOps'y stuff sometimes (because in a way it's the spirit of our company), or have experience with the cloud native ecosystem. Ideally you'd have experience working with an IaC tool, i.e. Terraform, Pulumi, Ansible, CloudFormation, Kubernetes, or SaltStack.

Overall we have a deeply technical product, trying to build something customers love to use, and have a lot of happy and satisfied customers. We promise interesting work, the ability to open source parts of the project which don't give us a business advantage, as well as healthy working hours.

If that sounds like fun to you, please apply at https://careers.spacelift.io/jobs/3006934-software-engineer-...

You can find out more about the product we're building at https://spacelift.io and also see our engineering blog for a few technical blog posts of ours: https://spacelift.io/blog/engineering

Nango | Staff Backend Engineer, Founding DevRel, Founder's Associate | REMOTE (NA/LATAM/EU) + ONSITE (San Francisco) | Full-time | $140K–$220K + equity

Nango (https://nango.dev) is an open-source platform for product and AI-agent integrations. We handle auth, syncing, and tooling for 900+ APIs so developers can ship integrations in hours instead of weeks. 11k+ stars on GitHub.

Open roles:

- Staff Backend Engineer — REMOTE (North America, LATAM, Europe) | $140K–$220K + equity. Design and scale the backend systems and APIs that power millions of integration runs, and work directly with developer customers on hard integration problems.

- Founding Developer Relations — ONSITE (San Francisco) | $150K–$200K + equity. Build our presence in the AI developer ecosystem: content, conferences, community, partnerships.

- Founder's Associate — ONSITE (San Francisco) | $140K–$180K + equity. Work directly with the founders across strategy, product, ops, and GTM.

Apply: https://jobs.ashbyhq.com/Nango

Tuza | Product Engineer & AI Engineer | Shoreditch, London | Onsite 3 days/week | Visa sponsorship available

We build AI agents for banks, automating the manual work in sales, onboarding and activation. Raised $7m from Northzone, Connect Ventures and TriplePoint. Working with Worldpay, Barclaycard and NatWest. Team of 12.

Hiring two roles:

- Product Engineer: full-stack features (React, Node.js, TypeScript), API and cloud architecture (AWS) for agent workloads. 4+ years' experience.

- AI Engineer: multi-agent workflows (Temporal/LangChain), evals, fail-safes and audit trails for banking tasks. 4+ years' experience, strong Python.

Both roles spend time inside partner banks, working directly with the teams using the product. Competitive salary, equity, meaningful benefits and an epic team.

Go straight into an intro call with our CTO at https://calendly.com/d/dvrx-3s6-pw9/tuza-product-engineering....

SafetyWing | 100% Remote | Hiring Globally

At SafetyWing (YC W18), we’re building a global social safety net for remote workers — simple health, insurance, and retirement products designed to replace national welfare systems. Our mission is to remove geographical borders as a barrier to equal opportunity and freedom for everyone. If we succeed, we believe this will be one of the most important tasks of our time.

- General Manager, Nomad Insurance: https://safetywing.pinpointhq.com/postings/261cc20f-e1ae-4c7...

- Opener (3-Month Contract): $1.5K USD/mo base + commission https://safetywing.pinpointhq.com/postings/1634cc12-c769-4eb...

- Lifecycle Marketing Manager: https://safetywing.pinpointhq.com/postings/fd7106ba-d53a-4a6...

MONUMENTAL | https://www.monumental.co/ | Amsterdam, The Netherlands | Full Time | Onsite

We make robots that autonomously construct buildings, starting with bricklaying.

There's a lot of vapourware in robotics, but we're deploying robots across multiple concurrent sites today - and generating revenue. In the last couple of months, our robots have built affordable social housing, health care living units, canal walls in the historic city centre of Amsterdam, and a youth sports centre. Help us to build things that matter in the long run.

We're looking for experienced software engineers for many roles. You can help us solve problems like:

- Data sync and analytics queries across a fleet of robots (that can be offline for hours at a time)

- Modelling buildings in code and finding the right UI for operators to edit them

- Designing systems for robots to drive safely and fully autonomously around a building site

Check out the progress we've already made on Atrium, our operating system for robotics: https://www.monumental.co/atrium

We're rapidly scaling up operations (recently announced our Series B!) and we need experienced engineers who can build the systems that manage all of that complexity. If you think that 'full-stack' could reasonably mean debugging firmware, mixing buckets of mortar _and_ writing React components, we are looking for you. Robotics experience not required!

https://www.monumental.co/jobs

Read a post from one of our forward deployed engineers about how we prototype fast: https://buildmonumental.substack.com/p/can-robots-build-pret...

Netrias | Senior Software Engineer, Software Engineer, Senior AI Researcher, AI Researcher | Cambridge, MA, Bethesda, MD | ONSITE (US, hybrid) | Full-time | www.netrias.com/careers

Netrias is a fast-growing Artificial Intelligence (AI) company that specializes in the application of machine learning models for data harmonization and curation. We apply these technologies within the biopharma and life sciences domains, and are increasingly expanding the domains and applications we can apply them to.

We are hiring across several positions - from entry level to senior - to support the development and deployment of technology for our biopharma and life sciences customers focusing on:

- Data harmonization and curation - Machine learning and predictive modeling

We have several new, exciting efforts that we are looking for support on. Are you, or someone you know, passionate about multi-omics data integration and AI-ready data? If so, please reach out!

To learn more and apply:

www.netrias.com/careers

Elucid | Senior Security Engineer | Boston, MA | ONSITE (hybrid) | $130k–$170k | https://elucid.applytojob.com/apply/GaiNUaxbuO/Senior-Securi...

Elucid builds FDA-cleared AI software that analyzes cardiac CT scans to characterize plaque and predict heart attack and stroke risk. The world's best cardiologists use our output to make treatment decisions for real patients. As such, our platform is regulated as a Software as a Medical Device (SaMD) product by the FDA and we operate under HIPAA, ISO 13485, and ISO 27001.

We're hiring a Senior Security Engineer to help mature and scale our security engineering program: You'll work across application security, cloud infrastructure, and regulatory compliance, contributing to secure SDLC practices, threat modeling, code and design reviews, CI/CD security testing, AWS hardening and audit other activities to allow Elucid ship secure code quickly within a regulated SDLC.

We are looking for: 5+ years of experience in security engineering, application security, or a closely related software engineering role with a strong secure coding background, including fluency in cloud infrastructure security, common vulnerability classes (OWASP Top 10 and beyond), authentication, and cryptography fundamentals. Healthcare or regulated-industry experience is a plus, but not a requirement.

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.