Rootly | https://rootly.com/ | design, engineering, GTM, sales | SF Bay, Toronto, APAC
Rootly is an AI-native on-call and incident response. Modern Slack and MS Teams native incident management—from your first alert to retrospective. Trusted by 100s of leading companies including NVIDIA, Squarespace, Canva, Grammarly, Elastic, Tripadvisor, and Figma. Hiring across design, engineering, GTM, and sales https://rootly.com/careers#open-roles
*Fastly | Software Engineers (Senior, Staff, Principal) | US, UK, EU, APAC ONSITE PREFERRED | Full-time*
When you look at the headers of major websites, you’ll see us. If it has to be performant, secure, scaled worldwide, and always-on, it uses Fastly.
We're a global edge cloud platform for performance and security, emphasizing open standards, sustainable engineering, and resilience-by-design.
We're hiring across compute, security, platform engineering, network and edge protocols, release engineering, network architecture, client services engineering, and more.
Onsite preferred, but remote candidates with a strong fit are welcome!
Rather than building walled gardens, we co-founded the Bytecode Alliance, heavily upstream our work to open standards, actively author IETF drafts, and power the global infrastructure for open-source Python, Rust, Ruby, OpenStreetMap, and much more.
* The Stack: Rust, C/C++, Go, Javascript, Typescript, WebAssembly (Wasm/WASI), Wasmtime, Cranelift, eBPF/XDP, QUIC, HTTP, TLS, TCP, Varnish/VCL, Linux kernel internals, distributed systems, professional services. * Apply: https://www.fastly.com/about/careers
Lead SWE | ON SITE TORONTO MUST BE ON SITE. REMOTE WILL BE IGNORED | $130,000 – $210,000 CAD | FOUNDER-LEVEL EQUITY | Founder with 3x successful exits| We are building enterprise-grade, white-label reporting infrastructure for municipal governments across North America. Full technical decisions
Multi-tenant cloud architecture supporting Canadian data residency requirements Compliance framework buildout: SOC 2, PIPEDA, MFIPPA, security standards relevant to Canadian municipal procurement
Technical hiring as team grows
5+ years in cloud infrastructure or backend engineering with direct exposure to multi-tenant architecture, data residency, and uptime SLA commitments
Shipped production systems where a bug has legal or compliance consequences
Hands-on with SOC 2, ISO 27001, HIPAA, PIPEDA, or equivalent regulated environments
Can review and challenge AI-generated code and architectural decisions. Not threatened by AI tooling, not blindly trusting it
Can represent the technical platform for government IT evaluators
Comfortable inheriting existing TypeScript / Node.js / PostgreSQL codebase
Located in Toronto or willing to relocate
ben [at] civtiq [dot] com
Stream | Multiple Positions | Amsterdam (NL), Skopje (North Macedonia) | Boulder, CO (US) | Toronto (Canada)) | Remote possible | Full Time | Visa Sponsorship
At Stream, we use Go for our video SFU, chat API, Moderation and Feeds, serving high traffic from major apps like Strava, Nextdoor, Patreon, and Midjourney. Our tech stack: Go, CockroachDB, RocksDB, WebRTC, Raft, and Redis.
We're hiring for:
* Staff Backend Engineer – AI
* Senior Infrastructure Engineer
* Lead Data Engineer
* Senior React SDK Developer
Why Join Stream?
* High scale/ difficult engineering, we have customers using our products with millions of users
* Default alive. Startup growth opportunity with healthy revenue
* All managers are hands-on and capable engineers
* Edge network of servers around the world
* Great opportunity to learn and grow
Remote: our roles are primarily NL, US, North Macedonia, or CA-based (hybrid), but exemptions for remote work within the EU may apply to specific cases. Visa Sponsorship: Available for the Netherlands
Apply here: https://jobs.ashbyhq.com/stream?utm_source=5rrpvObp3r
klarasystems.com | Senior OpenZFS Developer | REMOTE | Full-time Contract
We have successfully hired from HN in previous rounds and are looking for another OpenZFS Developer (4+ years of experience) to join our team!
Klara Inc. provides development & solutions focused on open source software and the community-driven development of OpenZFS and FreeBSD. We develop new features, investigate/fix bugs, and support the community of these important open source infrastructure projects. Some of our recent work includes major ZFS features such as Fast Deduplication (OpenZFS 2.3) and AnyRAID: https://github.com/openzfs/zfs/pull/17567 https://github.com/openzfs/zfs/pull/18406
We’re looking for an OpenZFS Developer with:
- Strong C programming skills and understanding of data structures
- Experience with file systems, VFS, and OS internals (threading, locking, IPC, memory management)
- Familiarity with ZFS internals (DMU, MOS, vdevs, ZPL, datasets, boot environments)
- Ability to work across Linux, and FreeBSD environments
Previous upstream contributions to OpenZFS or other open source projects are a big plus.
Submit an application through our site: https://klarasystems.com/careers/openzfs-developer/
Renaissance Philanthropy | Research Engineer (Speech AI/ML) | Remote (worldwide)
Renaissance Philanthropy's aim is to activate a virtuous circle of increasing ambition and impact between philanthropists and innovators: by identifying frontier experts both in science and in new ways of solving problems; by tapping into the growing number of emerging philanthropists; and by building multi-sector initiatives that can harness the power of philanthropy, markets, and governments.
RenPhil's Engineering Hub supports mission-driven, grant-funded educational technology projects that seek to improve educational outcomes in fundamental skills like math and reading. This summer we're launching a program called LEVI Literacy, which has a goal of halving the number of struggling readers in the US within 5 years.
We're looking for an expert in modern voice AI to support this work. Our partner teams are building tools that assess and support early reading directly from children's speech in real classrooms — oral reading, spoken vocabulary tasks, whole-class instruction. These are hard, meaningful speech problems: young children's voices, noisy multi-speaker environments, and high stakes for getting it right — and fair — for every student.
We're looking for folks who:
- have built and operated production ASR or speech-processing systems
- know the full data-to-model pipeline: collection, annotation, fine-tuning, evaluation, and deployment
- can speak the languages of both research and engineering
- want to help create a world where all children learn to read well.
If this sounds like you, please apply!
Justworks | Associate Software Engineer, Expenses | Toronto, Canada | HYBRID | Full-time | $109K–$136K CAD
Justworks helps small businesses manage payroll, benefits, HR, and compliance so they can focus on running their business.
We’re hiring an Associate Software Engineer for our Toronto Expenses pod. You’ll work alongside 3–4 senior engineers building expense submissions, approvals and reimbursements, while helping migrate services from Ruby/Rails to Go and develop AI-powered features.
We’re looking for:
• 1+ year of professional software engineering experience
• Experience with a modern server-side language and interest in learning Go
• Knowledge of REST APIs, SQL, and relational data models
• A product-minded, customer-focused approach
• Curiosity about AI-assisted development
Apply: https://grnh.se/wlv9zr391us
G-Research | https://www.gresearch.com | London UK, on-site | Full-time
G-Research is a leading quant finance company. Big compute farm, interesting problems.
My team is hiring senior engineers to work on our (actually world class) DAG scheduling infra for distributing research and production workloads across the compute farm. What we do is roughly:
* maintain and improve the SDKs for that scheduler in Python, F#, and C#
* add interesting new features to the scheduler itself
* maintain and improve a web backend and UI for quants and engineers to monitor their jobs, increasingly with high availability requirements
* translate bidirectionally at the business level between low-level infra providers and quant/ML researchers
Some functional experience preferred, because our core product is in F#. Lots of dealing with very smart researchers and engineers, with the kind of fun problems arising when you run large ML workloads at scale.
patrick.stevens@gresearch.co.uk or my personal patrick+hackernews@patrickstevens.co.uk
Monumint (YC W24) | https://monumint.com | Full Stack Engineers | SF In-Person | Full Time | $125k–$225k • 0.50%–1.50% Tech stack: TypeScript | Node | React/Next.js | Postgres | Docker | K8s | LLMs
We’re building the Voice AI infrastructure layer for financial services. Banks and fintechs use Monumint agent to automate loan origination, account opening, servicing and customer engagement.
You’ll work on:
1. Driving down voice latency to human-conversation levels while scaling to thousands of concurrent calls
2. Deploying agents that run durable workflows across days or weeks, maintaining state across calls, tools, documents, and human handoffs
3. Making AI agents reliable and observable in a financial workflows: tool calling, evals, guardrails, and deterministic fallbacks
We’re early, you’ll have a huge impact. Email me (my name at the URL) or apply here: https://www.workatastartup.com/companies/monumint
QUOBYTE | Berlin, Germany | Full-time | ONSITE (Germany) | https://www.quobyte.com/
At Quobyte we are working on a highly scalable and fault-tolerant software storage system built around a parallel file system core. Our customers use us for large scale AI and HPC clusters in the enterprise and research, k8s and OpenStack infrastructures, and as a scalable backend for SaaS products. There are Quobyte clusters which span tens of thousands of machines and slurp 100s of GB/s!
Under the hood, we have built a full-stack fault-tolerant parallel file system, with everything from kernel development over our own replicated database system design to distributed algorithms (Paxos!) and performance. In short: lots of real-world challenging and fun problems!
We work as a highly efficient engineering team, ship frequently, do code reviews, and have lots of unit and integration testing. If you’re passionate about systems, we might be the right place for you!
Berlin, Germany (Onsite):
* Software Engineer (with a passion for Systems, 60-100k EUR) * Infrastructure Engineer (engineering and corporate infrastructure, 50-90k) * Customer Success Engineer (50-90k)
For detailed job descriptions please and application process, please visit https://www.quobyte.com/company/careers or write to work at quobyte.com.
CyberAtlas | https://cyberatlas.ai | Software Engineer | REMOTE Worldwide | Full-time
CyberAtlas maps the internet to help security teams, enterprises, and governments discover and understand their exposed digital infrastructure.
We’re hiring a Software Engineer to build internet-scale systems processing billions of domains and websites.
You’ll work on backend services, data pipelines, search, fingerprinting, vulnerability detection, malware detection, and performance optimization.
Looking for strong Python (Flask/FastAPI) and/or Go experience, large-scale data systems, OpenSearch/Elasticsearch, Redis/LMDB, MongoDB/Postgres, Docker, and production systems.
How to apply: Email atlas@cyberatlas.ai with your CV and, as a simple anti-bot check, include:
1. The query you ran on Finder (https://cyberatlas.ai/finder)
2. The first-page results returned by that query
3. Please include “HN Software Engineer” in the subject.
VersaFeed.com | SENIOR SOFTWARE ENGINEER (Python/Django + JavaScript - VueJS/React) | REMOTE (USA ONLY) | Full-time
About us: Fancy ETL pipeline which processes products from huge ecommerce companies. Data extraction and massage, delivery to destinations like Google/Meta/TikTok/etc. Profitable, 18+ yrs stable, 100% employee-owned. No VC, no pointless meetings, just serious coding.
Stack: Python/Django, JavaScript, VueJS/React, Docker, Git, PostgreSQL/Snowflake/DuckDB, Dagster, AWS + Strong agentic coding skills (Claude Code / Codex)
Compensation: $150K–$220K USD/year DOE.
You: 5+ yr senior dev who's seen (and fixed) enough dumpster-fire code to last a lifetime. Python/Django deeply internalized; solid JS skills and able to wrangle Vue/React. You rock backend data pipelines like old jeans: Dagster, Snowflake, DuckDB, Postgres - in the cloud or on your bitchin' VM rack. Docker and Git are second nature. You've embraced agentic coding while still keeping the bots from running the slop show. You play well with others and write code that's easy to live with. Bonus: building AI assistants with PydanticAI, Py2→Py3 migrations, CI/CD and DevOps chops.
Timezones: Primary time zone is PST (standups at 9AM PST). Generally async-friendly but you must reside in the United States and be geographically grounded.
Benefits: 401K match, healthcare/vision/dental, equity, fully remote. Stable company with no time-wasters.
Apply: email jobs+hn261 [the-at-mark-thing] versafeed [the-period-thing] com
Sudowrite | https://sudowrite.com | √ REMOTE (US) | √ PMF | √ PROFITABLE | Full-Time
Kind, smart, low-drama people, seeking the same to help make writing tools authors dream about.
Our users have published thousands of books using Sudowrite, and we're building a sustainable company, not chasing unrealistic growth targets set by VCs.
* We help the next generation of storytellers tell better stories.
* We believe the future of writing is AI & human collaboration.
* Co-founders both had prior exits.
—————————————————————
Hiring: Senior Mobile Developer
* Make writing on a phone a delight.
* You should have: Great taste and product sense, lots of agency, extensive React Native experience, and a sense of humor, adventure, and hope.
Comp: 160-180K, equity, 401K, profit share, retreats, unlimited books.
motan | Software Developer C#/.NET (4 openings) | Isny im Allgäu, Germany | ONSITE (partial home office) | Full-time | NO VISA (EU work authorisation required)
motan builds the equipment that feeds plastics processing - drying, mixing and conveying material into injection molding and extrusion machines. Our equipment runs in manufacturing worldwide.
We're hiring 4 C#/.NET developers.
Full job posting: https://www.motan-group.com/en/news/career/jobs/detail/softw...
I'm the architect of the software platform. My mail is in my profile - write me directly if you are interested or have questions.
Noricum | Senior Backend Engineer, Payments, Ledger & Provable Fairness | REMOTE (2h overlap with US Pacific) | Contract to permanent | $120-160/hr | Start by 14 Sep
I'm the founder of Noricum where we build platforms – currently the money infrastructure, ledger, engine and payment rails behind a pre-launch wagering platform with a Steam skins economy. The games, a cashier and a bet ledger are built and live as a front end, with written specs for the server contract: ledger schema, refusal table, round lifecycle, every game's arithmetic. Processing and licensing are secured. The server does not exist. That is the job. You would own:
- A server-authoritative game engine - seeds, nonces, outcome computation - A double-entry ledger where balance is derived and no client write can change it - Server-side enforcement of every limit and refusal - Payment rails idempotent under duplicated webhooks - Seed custody and the provably-fair lifecycle - An affiliate system with referral attribution and commission payouts
Must have shipped: a double-entry ledger or equivalent money system in production, a payment integration including webhook idempotency, auth and sessions you built and operated, and infrastructure you owned end to end. Provably-fair systems, settlement-side gaming or trading infra, or Steam trade automation all stand out.
Email michael@noricum.io with your start date and a few lines on the last money system you shipped - what it guaranteed, and how you knew it held.
Location: Córdoba, Argentina Remote: Yes, remote only Willing to relocate: No Technologies: TypeScript, React, Next.js, Node, GraphQL with Apollo, Playwright, SQLite, Postgres, LLM agents, MCP servers, RAG, promptfoo evals, OpenTelemetry Résumé/CV: https://portfolio-aguirre-alexis.vercel.app GitHub: https://github.com/ale-aguirre Email: aguirrealexis.cba@gmail.com
Full-stack dev, 5+ years, last year spent building LLM products rather than demos.
I have a document comparison SaaS running in production at an Argentine auto parts manufacturer, 72 employees, in a domain audited against IATF 16949 and ISO 9001. Two people there use it for their actual work. The interesting part is not the LLM call, it is the semantic reclassification I run after it, because the model kept flagging paraphrases as real differences.
I also run an autonomous job search agent on my own search. The useful thing it taught me was that my own verifier was lying. It counted a URL redirect as a successful application, and one integration had been failing at zero percent for months while the aggregate sat at seventy eight.
A job posting with hidden instructions once got that same agent to write ten years of Kubernetes into my CV. The system prompt did not stop it, a deterministic validator did. I published that as intent-gate on npm.
Yesterday I shipped a PR and two issues to an open source AI SDLC project, one of them about an agent being able to write the field that marks its own check as platform verified.
Open to full-time or contract.
Stpkr Technologies | Noida, India (Delhi NCR) | ONSITE | Multiple roles
Stpkr Technologies is hiring for the following roles to build the next generation of wearable devices.
We are currently looking for the following roles but we are also open to interviewing any candidates who feel like they will do their best work here - even if your skillset/experience doesn't fit the current defined roles. Our current team doesn't fit the conventional mold, and we don't expect our future hires will either. If you don't fit the advertised roles, just send us a mail per the same process with whatever job title would fit you the best.
Work is in person near Noida Sector 18, walking distance from Sector 18 Metro Station. We prefer in office work, and for you to be located within Delhi/NCR, Pay is competitive (9-12 LPA), and there are opportunities to earn meaningful equity down the line. We prefer current and recent undergraduates for our roles. If you are still in college we welcome you to apply nonetheless provided you can work as an intern for us in person. Super-flexible overall and all of our current team started out as interns. We are not flexible on in-office work because of operational requirements - please do not apply if you can't relocate/work from office.
Hiring across OS, software, and hardware. AI policy across all roles: you should be able to do the work without AI, and much faster with it.
Systems Engineer - Everything at the OS layer. You've rooted phones, flashed custom ROMs, broken and fixed Linux for fun. Comfortable in C/C++. GitHub with kernel-adjacent or LineageOS-type projects a plus. Stack: Android, Linux, C, C++, Java. Filter: send us something you built where you had to fight the OS or hardware.
Hardware Engineer - Bring-up/Debug/Integration - Take EVT/DVT boards and make them work. Comfortable with J-Link and IDE debugging, reading schematics and reference designs. KiCad/Altium/EasyEDA hobby work would make you ideal. PetaLinux experience or hunger to learn it. ECE undergrad fine. Filter: photo of a board you designed or debugged, plus what went wrong.
Hardware Engineer - Power/RF/Wireless - Make the power and RF paths behave on EVT/DVT boards. Hands-on with schematic capture, layout, soldering, scope/logic analyzer. Given two unknowns, you pick one and start measuring. Filter: sensor fusion work, how noise behaves across protocols, and SPI debug chops.
Founder's Office - Work closely with the founder and the rest of the team to manage the day to day and long term affairs of the company, the Man Friday of the company. Must have a decent degree of technical knowledge (we are a tech company after all) and be efficient at administrative tasks as well as management. Speed and learning ability are prized here, there will not always be a clear path to the work you have to do here, so you will have to figure some of it out on your own.
To apply, contact arnav@stpkr.in with the subject line "HN - Human" and a brief intro for further communication. Attach any documents you deem useful there. Please include the role you are applying for at the top of the email if it is one of the above mentioned, otherwise whatever role fits you best. Shortlisting will be online, interviews will be in person. We are hiring quickly, expect to hear back from us within 2-3 days of applying. If you don't, assume you will not. If you are using an AI agent to mass apply for jobs and we can tell, then you will not hear back. Use an expensive one :P (reiterating this, because we receive so much AI spam now. Thanks for your time!
Yardstik | Multiple Open Roles | Minneapolis, MN (Hybrid)
- Head of Security and Infrastructure | $160,000 - $230,000 | apply at https://app.trinethire.com/companies/135023-yardstik/jobs/12...
- Senior Software Engineer | $120,000 - $200,000 | apply at https://app.trinethire.com/companies/135023-yardstik/jobs/12...
We just completed our Series B and are growing https://yardstik.com/news-articles/yardstik-raises-30m-in-se...
Yardstik is a start-up software company with a mission of building trust and safety into the Internet Economy. The world of background screening, certification, and training has lacked innovation and we’re here to change that for our customers. Our enterprise-class technology allows us to provide a right-fit solution for our customers realistic for any platform, in any industry. Join us in our efforts to protect organizations and their people.
We are honored to have recently been named a MSPBJ Best Place to Work for the sixth year in a row and named to Newsweek’s America’s Greatest Startup Workplaces. Come be part of our amazing culture and join an environment where you can see and feel the impact of your work every day.
Proxybase | Backend Systems Engineer (Rust) | Remote, Global | Full-Time
Hi HN, I’m the founder of Proxybase [0]. We’re building a SOCKS5 proxy network focused on transparency and ethical sourcing in the residential proxy market. A quick note for anyone who applied last month: thank you to everyone who reached out. We received far more strong applications than expected, and between running day-to-day operations and working through the backlog, we took much longer to reply than we should have. If you applied last month and haven’t heard back yet, I’m sorry for the delay. We’re actively reviewing those applications alongside this new batch.
Why Proxybase? The residential proxy industry has a rough history. Some providers rely on hidden background scrapers bundled into TV firmware or mobile apps, while others use payout systems that can hold provider funds for months.
We’re trying to build something better: Open-source clients: Our GUI [1] and CLI [2] are fully open source, so anyone can inspect and audit what runs on their device. Explicit consent: Providers knowingly opt in. No stealth bundling. Fair, fast payouts: The minimum payout is $1, sent directly to provider wallets in USD stablecoins. We do not hold funds to earn interest on them.
We’re hiring a Backend Systems Engineer with Rust experience to help build:
Asynchronous SOCKS5 routing infrastructure, Daemon and node orchestration, Automated bandwidth-allocation pipelines
Stack: Rust, Tokio, Axum, SOCKS5, Linux systemd daemons, SQLite
Location: Fully remote, async-friendly, flexible time zones Compensation: Competitive salary plus equity. USD or stablecoin payment options are available.
If you’re interested in building infrastructure for an industry that needs better standards, email jobs@proxybase.xyz with your GitHub, résumé, and a short note about what you’ve been working on recently.
I’ll also be around in the comments to answer questions and hear feedback.
Astronomer | https://astronomer.io | NYC preferably, open to remote | Full-time
Hiring for ~10 eng roles listed at astronomer.io/careers, but the focus is specifically on distributed systems, observability, and applied AI.
Astronomer is a primary contributor to Apache Airflow and offers our customers a managed Airflow service with a similar business model as Databricks with Spark or Confluent with Kafka. Our tech stack is primarily Go, Python, and TypeScript. The problems we work on generally center around (1) building out our commercial managed Airflow offering, (2) building a data + infra observability stack on top of Airflow, and (3) building AI products and experiences that are genuinely load-bearing and additive to our customers experience on the platform.
We're also starting to write more about the work we're doing, this is pretty representative: https://www.astronomer.io/blog/astro-airflow-re-engineered-f...
Apply using our website or email me - my email is [firstname]@astronomer.io. Include HN in the subject to make sure I don't miss it! If you're emailing me, please include your resume, GitHub and a short note on what you deem to be the most interesting thing you've worked on.