lovable | stockholm, london (in-person) | full-stack, frontend, backend, infra design, and ai research we sponsor visas and have very generous relocation packages.

lovable is building an agentic technical co-founder, we are the best way for non-technical people go from idea to a real software business with paying users. we need the best engineers in the world to join us and will compensate you accordingly.

learn more at: https://lovable.dev/careers, https://lovable.dev/blog, or ping me on https://x.com/cviktore

AI x Healthcare Startup | bracehealth.com | Boston, MA Onsite | Full-time | Early Engineer

We're looking for a backend-leaning fullstack dev. You will be one of the first engineers outside of the founding team. Here is a bit more about us: We're a seed stage AI startup backed by top tier investors. We're on a mission to ensure every patient gets covered for the care they need and every doctor gets paid for the work they do.

We’re building deep, vertically integrated technology systems to solve fundamental problems in US healthcare - the biggest market in the world ($5T). We use AWS, K8s, React, and Rust but there is no requirement to have prior experience with them specifically. We'll teach you!

We are a founding team made up of ex-YC, Amazon, Meta, Microsoft, and Harvard Business School with previous successful exits.

You’ll own entire product areas and be expected to play a true full-stack role, with the ability to go from customer need to end-state product. You’ll work directly with the CTO at the edge of what's possible with LLMs and agentic systems applied to a hard domain. You'll contribute to technical strategy, make real architectural decisions, and write vast amounts of production code with AI first developer workflows. Most importantly, the technology you build will have real impact on real people - clinics staying open, clinicians getting paid, patients getting care.

This is an opportunity to work in a fast paced, high ownership environment while solving real problems in healthcare.

We're happy to share more details on the role in person/on zoom. Please fill out this form if interested!

https://wgwx7h7be0p.typeform.com/to/LV0t8OjI

CABLE | Software Engineer (early team) | Sydney, Australia (ON-SITE) | Full-time | https://jobs.cable.energy/roles/3e2cd174-71f5-80ae-a1d2-db8b...

We're Australia's battery-backed electricity company. We fund, install and operate batteries on-site at small businesses, then supply their power at a firm, flat rate 20–40% below incumbents, making the economics work by optimising those batteries against wholesale prices. We're live with real customers. Team of six, backed by Systemiq and Black Nova; engineering includes Casey, who previously led Google engineering in Paris and Google Maps in Sydney.

We're AI-native: engineers, energy specialists and go-to-market colleagues all ship with coding agents. Each engineer owns a product end to end, from the commercial problem through to production. Flat structure, lots of ownership.

Areas you could own:

* Customer experience: quoting, onboarding and the customer app

* Metering and billing: turning high-volume interval data into accurate bills

* Energy-market and battery data: the market, weather and telemetry pipelines behind our decisions

* The agent-driven development platform the whole team builds on

Stack: TypeScript, React, Postgres, serverless. Intro chat, system design, an agentic build, then a day with the team.

Apply at https://jobs.cable.energy/roles/3e2cd174-71f5-80ae-a1d2-db8b... or email theo@cable.energy.

Sumble | Multiple Roles | Remote (US)| Full-time Sumble is the newco from the founders of Kaggle. We are hiring full stack engineers, ai/ml engineers, growth/marketing, sales and customer success. Can view our roles and apply here: https://sumble-inc.workable.com/

- We are building a knowledge graph from web data with a first focus on data for go-to-market teams. - We use web data to identify things like org structure, tech stack, and key projects (e.g., GenAI initiatives, cloud migrations). - Our product already has strong product-market fit, early revenue, and happy customers — and now we’re ready to accelerate. - Our long-term vision is to become the world's best data vendor. Try the product at sumble.com. - We are a team of 35 with experience at companies such as Google, Meta, Stack Overflow, Rippling, Snowflake, Confluent and Kaggle. - We raised $38.5MM from Coatue, Canaan, Square Peg Capital https://techcrunch.com/2025/10/22/sumble-emerges-from-stealt...

Toolhouse AI | Head of AI Sales / AI Go To Market | SF, ATX, or REMOTE (US) | Full-time | $180k–$250k OTE + Equity | https://toolhouse.ai

Toolhouse AI builds autonomous AI agents that execute complex, multi-step business operations and workflows across 1,000+ integrations...letting teams delegate repetitive tasks in plain language. We are model-agnostic and serving fast-growing companies and prosumer teams.

We've grown naturally in the last 7 months with a founder-led sales motion this far. But it wont stop here. We need to take it to the next level!

We are hiring our first Head of Sales / Go To Market to build and own our entire revenue engine from 0 to 1.

What you’ll do:

* Own end-to-end sales strategy, outbound pipeline generation, and enterprise deal closing.

* Design and execute our GTM motion for both mid-market/enterprise buyers and self-serve expansions.

* Work closely with our engineering and product people to feed customer insights back into our product roadmap.

* Establish pricing, sales playbooks, customer success handoffs, and contract structures.

What we're looking for:

* 5+ years of experience leading sales/GTM in developer tools or B2B SaaS.

* Proven track record closing early-stage technical buyers, engineering leaders, and ops executives.

* High agency and hands-on execution: you love closing deals yourself before building out a team.

* Deep curiosity about AI, autonomous agents, and tool execution ecosystems.

*Stack & Tools:* LI, Apollo, PHONE, Attio, Notion, Slack, plus our own suite of Toolhouse AI workers.

Apply:

Email us with a brief note on a zero-to-one GTM motion you've already led that you would use as a base of your strategy to hello+hnsales@toolhouse.ai (any other type of reach out will be flagged as spam - please mention this post when reaching out).

Tandem Health | Engineers, Designers, PMs | On-site in Stockholm, Sweden | Full time

At Tandem Health we're building the AI-native operating system for clinics, so clinicians can focus on care rather than administration. We're building, launching and iterating quickly, and already support more than 10,000 care organisations across 14 European markets, including most of the NHS. We recently raised a $100M Series B to go further, faster.

It started with our AI medical scribe, which listens in to the patient-clinician encounter to generate medical records and saves clinicians 5-10 minutes per patient. Today our AI medical assistant supports clinicians before, during and after each visit, with medical coding and clinical decision support, three products certified as medical devices under EU MDR.

We're expanding our Stockholm team with exceptionally driven builders in a wide range of roles.

More info and application at https://tandemhealth.ai/about/careers

Feel free to reach out to me at john.moberg[at]tandemhealth.ai if you have any questions, but please don't send applications my way

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

DuckDuckGo - we are looking for candidates that are excited to join us on a mission to raise the standard of trust online. All of our roles are fully-remote, except where specific locations are noted. S enior Web Security Engineer, Browser Platform - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/a447e823-fd8f-438f-909...

Senior Backend Engineer - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/53022b02-da3d-4fda-827...

Staff Data Scientist - $222,033 USD annually + equity https://jobs.ashbyhq.com/duck-duck-go/9c381171-f346-4d7a-876...

Director, Data Science - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/0269aeaa-8d8f-4c8d-b78...

Director, Privacy Engineering- $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/494caa52-2916-49f0-9c4...

Director, Paid Marketing (Subscriptions) - (Remote within USA) - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/f8570953-8ea3-4955-bfb...

Senior Growth Marketing Manager (Subscriptions) (Remote within USA) - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/ec51a831-c582-425c-a8c...

Senior Product Partnerships Manager (Remote within USA or Canada) - $200,267 USD + equity https://jobs.ashbyhq.com/duck-duck-go/dc1027ae-8f6a-44eb-b11...

Relevant Healthcare | Lead Engineer | Remote (US/Canada only) | Full-time

Relevant builds a data platform that helps safety-net healthcare providers deliver better care using data from their electronic health records. Our customers are non-profit clinics called Community Health Centers. You can read more about them, us, and the role on our jobs page: https://relevant.healthcare/jobs/

We're a small team (~25 overall). We're bootstrapped (no external capital whatsoever, VC or otherwise) and profitable. We've got a modern tech stack (Rails, Typescript, Go, React, GraphQL, d3) and a healthy approach to both tech debt and work/life balance… and we’re also a very nice group of people that get to work on interesting problems for some of the few unimpeachably good actors in healthcare!

JustPark | Senior Software Engineer, Reporting | Hybrid: Dallas, TX | Full-Time/Perm | Competitive salary + Benefits.

Apply at: https://apply.workable.com/j/FE43DE896A

JustPark is the premier partner offering both B2B solutions for destinations and B2C services for drivers, giving us the best of both worlds. We simplify the entire parking experience. From venues and councils to private driveways, our platform makes it simple for drivers to find, book, and pay for parking—while empowering our operating partners to deliver exceptional parking experiences.

Join the JustPark Reporting team. You'll build, ship and maintain the data platform and reporting products behind our venue operations, used at venues like Mercedes Benz Stadium, The Greek Theatre and The O2 Arena. Following the 2024 merger of ParkHub and JustPark, we're scaling internationally, which means distributed systems, teams, and interesting problems at the intersection of payments, data and real time event operations. This is a hands-on engineering role where you'll own meaningful pieces of our platform from design through production, including keeping them healthy on live event days. We're an AI native engineering team: engineers use Claude Code, Copilot and Cursor as daily tools for code generation, review, debugging and documentation, and we build MCP integrations that connect our AI tools directly to Jira, Confluence, Slack and internal APIs so engineers stay in flow. You'll work closely with Product, QA, and our UK engineering and data teams to shape the data strategy of a fast growing international company.

Some of what you'll be doing: -Design, build and ship backend services and streaming data pipelines in Go that handle real world scale -Own data end to end: event schema and contract design, durable messaging patterns, and the read models and warehouse tables analytics is served from -Build financial data flows, including payment processor ingestion, fee reconciliation and ledger backed reporting -Ingest and reconcile third party data (partner files and payment processor APIs) with idempotent, replayable backfills -Develop and evolve API and GraphQL serving layers that power our internal and external products -Migrate existing reporting paths onto the new architecture

River | Staff Engineers (Elixir) | NYC or REMOTE (US, Europe, South America) | Full-Time | $200K-$250K + equity | https://jobs.ashbyhq.com/river?utm_source=Zp9nJyqvd4 I'm Alex, founder and CEO of River. I also wrote the first line of code and still ship PRs.

River is a client-first Bitcoin-only financial institution building the financial app people use every day to save in bitcoin and spend in dollars. We custody over 33,000 BTC, serve individuals and businesses across the U.S., and are profitable. We publish cryptographic proof of reserves monthly and our company financials annually.

Here's what our engineering team is working on:

  - Real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API
  - Next-generation Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure
  - Scaling our ML/AI systems (Python, PyTorch, XGBoost, LLMs) to automate operations and tackle fraud/risk
  - A ground-up React and React Native rewrite of our consumer app
  - Porting our Lightning Network infrastructure from Go into Elixir

We're hiring: - Staff Software Engineer (Elixir) | $200K-$250K

Apply at https://jobs.ashbyhq.com/river/610f652b-bdb9-4d82-9973-680ba...

Arrangr | Growth Lead, Expansion & Lifecycle | REMOTE | Fixed-fee project ($12K, milestone-based) + equity tied to ARR results → founding role | https://arrangr.com

Arrangr is a scheduling platform with tens of thousands of registered users and hundreds of thousands of people reached through scheduling invitations. Calendly is the incumbent, and it's good. Our thesis: booking links make it efficient to fill your calendar, not productive. Every open slot looks identical, so your best hours go to whoever clicks first. Arrangr schedules by importance.

The opportunity: we can see which companies already have several people using Arrangr individually. Each of those is an unmonetized team. You'd build the motion that converts them (in-product surface, sequences, landing page, pilot) and handle the replies it generates: seats, admin rights, security questions. Then reactivate a large dormant base and fix acquisition.

The engagement: five milestones over roughly three months, $12K paid on milestone completion, milestones 1 and 2 contracted first. "Done" means shipped, instrumented and measured against a baseline. Equity is a defined grant tied to new ARR booked; hitting the middle tier triggers a founding title. Engineering time is limited, so you ship within existing product surfaces.

Right for you if you've run PQL-to-team expansion and reactivation against a base in the tens of thousands. Not for CRO specialists (our volume won't support the testing), paid media buyers, or anyone who wants to manage a team. There is no team. You're it.

To apply: no cover letter. Email adams@arrangr.com with three links to things you personally built, one line each on what the numbers did. Plus one answer: we can see which companies have several individual users. How would you turn that into team conversions, and have you run that motion before?

I read and reply to every one. – Adam, co-founder/CEO

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

OpenSanctions | Product Engineer | Berlin, Germany / REMOTE (CET ±3 preferred) | Freelance / employment

OpenSanctions is a small, bootstrapped company building an open source database of sanctioned people and companies, politicians, and other entities of public interest. Journalists use it for investigations; hundreds of businesses use it for compliance screening.

I'm looking for a product engineer to own the systems around our commercial product: customer signup and lifecycle management, billing, reporting and analytics, and tools for our support team. You'd work across Python, SQL, and React/Next.js. You'll be empowered to decide what to build, working with the people who use these systems. We hope to ship improvements continuously and see what works quickly.

We're remote first, with a desk in Berlin if you want one. This is a freelance role with an option to go for employment. We're reviewing applications on a rolling basis. Not considering agencies.

Details: https://www.opensanctions.org/docs/company/jobs/2026-09-prod...

Please apply through the form linked in the job description - no cover letter, just share some basic facts please :)

Location: Erzurum, Turkey (UTC+3)

Remote: Yes (remote only)

Willing to relocate: No

Technologies: GitHub Actions (CI), Python, shell (CI steps), mutation testing (mutants checked into the repo), Claude Code (agentic workflows)

Résumé/CV: on request | GitHub: https://github.com/onur-kesim | Writing: https://dev.to/onurkesim

Email: onurkesimbjk@gmail.com

Test & CI assurance for AI-generated codebases. Your build is green. I measure whether that green means anything.

Evidence rather than claims:

A release step in a Rust project could go green on a 404 and record the SHA of the error response. I reported it; the maintainer wrote and merged a fix within three days: https://github.com/unhappychoice/gitlogue/issues/236 My own CI once ran 58 test scenarios, crashed before writing any result, and the step still reported success, because continue-on-error hides more than you expect. Write-up: https://dev.to/onurkesim/do-not-trust-the-green-checkmark-48... My own tool's sabotage script and mutant files are public: https://github.com/onur-kesim/hafiza-kur (faz0/) A docs patch of mine is in drift's develop branch, committed by the maintainer: https://github.com/simolus3/drift/commit/d9f88e5b27531cfcfcd...

Caveats: 23 years in technical acceptance and maintenance of high-tech systems, including auditing a quality management system, but months, not years, in software. My code is mostly written by AI (Claude Code); the design, the checks and the verdicts are mine. I have not worked inside a team codebase or run a live system with real users. What I offer is a measurement, not seniority.

Looking for: part-time remote work (10-20 hrs/week) or fixed-scope audits of test suites and CI gates.

Thunder Compute (YC S24) | C++ Systems, Infrastructure, BizOps | San Francisco (Onsite) | Full-time | https://www.thundercompute.com

We're building the VMware for GPUs. Most GPUs in the cloud sit idle a lot of the time because they're bolted to one machine over PCIe. We decouple them.

Our virtualization layer is a userspace shim, loaded through LD_PRELOAD, that intercepts CUDA calls and ships them over the network to a host with a physical GPU somewhere else in the data center. Workloads run unchanged. When a process goes idle, the GPU detaches and gets reassigned, and reattaches in tens of milliseconds when it's needed again. Think Ceph for GPUs: the GPU becomes a network resource a cluster-wide scheduler can pool and pack.

The hard part is making that fast. We're within ~10% of native on most AI workloads, and it lets us serve ~1.8x more users on the same fleet. We run it in production as our own GPU cloud and sell it to enterprises with underutilized fleets.

Team is from Citadel Securities, Aquatic, Old Mission, AWS, and Bain. Series A, $17.5M raised from Matrix and Y Combinator.

Open roles:

- Software Engineer, C++ Systems ($215K-$325K + meaningful equity). Low-level, latency-sensitive work on the virtualization layer. Quant dev / HFT background preferred: https://jobs.ashbyhq.com/thundercompute/2efae53b-817c-43e7-9...

- Software Engineer, Infrastructure ($150K-$250K + meaningful equity). Go, Kubernetes, reliable systems at scale: https://jobs.ashbyhq.com/thundercompute/927a922b-c607-4b0e-a...

- Business Operations Lead ($150K-$225K + meaningful equity): https://jobs.ashbyhq.com/thundercompute/4f28e418-b77b-446e-a...

If you're cracked at building systems software and want to do something more meaningful than creating liquidity, reach out.

Email me at carl@thundercompute.com and mention HN. I read every email.

CareerJumpShip | Multiple engineering + go-to-market roles | Remote-first

- Shinvestments (3 roles) — Technical Writer II, Remote — https://www.careerjumpship.com/jobs/technical-writer-ii-shin...

- Bree (2 roles) — Software Engineer, Backend (Co-op), Remote · $104K–$150K — https://www.careerjumpship.com/jobs/software-engineer-backen...

- Emergent Software (2 roles) — AI Director, Remote — https://www.careerjumpship.com/jobs/ai-director-emergent-sof...

- Leadership Connect (2 roles) — Software Engineer / Senior Software Engineer, Remote — https://www.careerjumpship.com/jobs/software-engineer-senior...

- Matchgroup (2 roles) — Software Engineer II, Android, Palo Alto, California · $140K–$160K — https://www.careerjumpship.com/jobs/software-engineer-ii-and...

- Samsara (2 roles) — Manager II, Software Engineering, Infrastructure, Remote · $260K–$260K — https://www.careerjumpship.com/jobs/manager-ii-software-engi...

- SpaceX (2 roles) — Full Stack Software Engineer, Bastrop, TX — https://www.careerjumpship.com/jobs/full-stack-software-engi...

- True Tandem (2 roles) — Power Platform Developer, Remote — https://www.careerjumpship.com/jobs/power-platform-developer...

Location: Dorset, UK

Remote: Yes (UK, US and EU time zones)

Willing to relocate: No

Technologies: Ruby on Rails, Python (FastAPI), TypeScript/Node, Go, PostgreSQL, AWS, Hotwire

Resume/CV: https://wagnermatos.co.uk

Email: wm@wagnermatos.co.uk

Senior engineer, over 15 years. I build complete products: one senior engineer accountable end to end, AI accelerated. Recent work includes a clinical alerting platform used by NHS trusts, an edge to cloud analytics platform for Johnson & Johnson Medical, and the cloud platform behind a fielded detection hardware fleet. Also open to contract engagements. Case studies and client testimonials on the site.

Sidekick Labs | Senior SWE, R&D Engineer, Intelligence Engineer | REMOTE (US Timezones) | Full-time | $170k to $230k Base + Equity + Health

Sidekick builds AI security software for enterprises. Our sensors observe AI behavior and use in situ. From those observations, our reasoning pipeline produces an application inventory and a risk picture, allowing us to provide real-time intervention and coaching right when it matters.

Compensation: base salary scaled to experience, meaningful early-stage equity, and 100% covered health insurance for you and your immediate family

We are a highly senior team. Most of us have been founders or on early founding teams, so we operate with high ownership. We expect you to have a real, current AI-assisted development practice. Our system spans several languages, and we expect you to use AI tools to quickly navigate unfamiliar parts of the codebase so you can comfortably own problems end-to-end across a broad stack.

We are hiring for three roles:

- Senior Software Engineer: You will work across our event-driven architecture. You'll write Go and Python backend services and touch endpoint-deployed browser and desktop components. You need to be comfortable developing in a multi-tenant, microservice-driven SaaS architecture and understand typical scale and security implications for such products.

- R&D Engineer: This is not an open-ended research function. You will take ambiguous feasibility questions tied to our roadmap and return defensible answers inside a week. You'll build handoff-ready prototypes, then shift into engineering mode to personally drive them through to production. You will also define operational envelopes and degradation boundaries, and rigorously deprecate infeasible ideas with documented rationale to avoid future re-litigation.

- Intelligence and Data Processing Engineer: This role is for someone who loves real browser and desktop forensics. You'll use dev tools and debuggers as your primary instruments. Expect to be reading minified code to find where state lives and analyzing network logs to understand undocumented APIs. You will figure out how AI products work and build the prototyping and automation to maintain our software inventory.

To apply: Send an email to eric+hn@sidekicklabs.com with the role in the subject. Include a PDF of your resume, a quick sentence or two about a tough technical problem you've solved recently, and links to your GitHub, personal site, and/or LinkedIn.

I'm Eric, VP of Technology, and I will personally read every email sent to the HN subaddress. You can view my background here: https://www.linkedin.com/in/three-two-one

https://sidekicklabs.com