ParadeDB (YC S23, https://paradedb.com) | Database Internals Engineers, Platform Engineers | Remote or hybrid in San Francisco | Full-time

ParadeDB is a Postgres extension that delivers state-of-the-art search in Postgres. Our customers, including Alibaba Cloud, BILT Rewards, Modern Treasury (YC S18), and many others, rely on us to deliver the performance and feature set of dedicated vector databases/Elasticsearch natively in Postgres, simplifying their stack and day-to-day operations.

If you like systems, this might be for you. We're a team of 10, a Series A company based in SF but distributed across North America. We're hiring for database internals work (e.g., building the database in Rust) and distributed systems work (e.g., building the database-as-a-service platform in Go).

We're open-source at https://github.com/paradedb/paradedb.

Our technical blog: https://www.paradedb.com/blog

More info on roles: https://paradedb.notion.site/

SentiLink | https://www.sentilink.com/ | Engineering & Data Science | REMOTE, HYBRID, and ONSITE (UNITED STATES ONLY) | Full Time

Primarily hiring in the U.S. for more senior level roles.

We’re hiring across Engineering (Primarily Backend/Data Platform) and Data Science / ML roles. Hiring at Manager/Director level as well as Senior IC levels. We’re language-agnostic and hire for fundamentals.

Across the team you’ll see: • Python, Go, Rust, Scala • PostgreSQL, Snowflake • Kafka, Redis • Terraform, Kubernetes • ML: XGBoost, PyTorch, Feature stores, real-time scoring pipelines

If you love solving complex distributed systems challenges, building customer-facing ML products, or working on detection systems that must be both high-precision and low-latency, you’ll fit right in.

Roles are here: https://jobs.ashbyhq.com/sentilink?utm_source=hacker_news If you have questions, feel free to reach out directly at liz.woodfield at sentilink dot com.

At SentiLink, we stop identity fraud at scale. Our products protect banks, fintechs, marketplaces, and leading financial institutions from synthetic identity fraud, identity theft, and emerging threat. We analyze millions of applications while keeping real users moving fast.

We’ve seen tremendous traction and are growing extremely quickly. Our real-time APIs have helped verify hundreds of millions of identities, starting with financial services and rapidly expanding into new markets. SentiLink is backed by world-class investors including Craft Ventures, Andreessen Horowitz, NYCA, and Max Levchin.

SentiLink supports a variety of ways to work, ranging from fully remote to in-office. We operate as a digital-first company with strong collaboration across the U.S. and India. We maintain physical offices in Austin, San Francisco, New York City, Seattle, Los Angeles, and Chicago in the U.S. If you’re located near one of these offices, we would love for you to spend time in the office regularly. Some roles are hybrid or in-office by design.

We’re a small, high-impact team solving one of the most interesting and adversarial problems in fintech: how do you build systems that reliably determine whether a real human is on the other side of a financial transaction?

FunnelStory | MTS, AI/ML | Remote (India) | Full-Time | https://funnelstory.ai

FunnelStory is building agents to autonomously protect and grow revenue for post-sales teams. Our agents need evidence-backed signals from large-scale structured and unstructured enterprise datasets.

You'd work on cohort analysis, prediction models, experiments, and whatever else it takes to make those signals hold up. Our tech stack is primarily Go.

Please email preetam @ funnelstory.ai with "HN - AI/ML" in the subject if you are interested.

Tenki Cloud by Luxor Tech | San Francisco, CA | Founding Sales | Full-time | SF-based preferred | https://tenki.cloud/

We're building Tenki, Luxor's compute platform for developers and AI agents: faster, cheaper GitHub Actions runners, code-review agents, and isolated sandboxes where agents run code. Next up: agent workflows and CPU/GPU compute.

Tenki was built by the founding team behind Luxor Technology, a leading provider of Bitcoin mining and AI infrastructure. Teams like Anchor, Omnara, and Naive already rely on it, and MAU has grown ~3.5x since April. We're building the infrastructure layer for the next generation of AI companies, and we want Tenki to be the go-to platform for AI teams worldwide. Now we need someone to sell it.

You've sold technical products to technical buyers and can talk CI pipelines and infra costs without hiding behind a sales engineer. Dev tools or cloud infra experience is a big plus.

What you'll do: - Own the full cycle, from prospecting to close to expansion - Turn self-serve signups into revenue - Work closely with engineering and product, and bring customer feedback into the roadmap - Build the playbook from scratch - Show up at SF meetups, hackathons, and dev events

You'd be the first sales hire on a small, technical team. No playbook yet, full ownership.

Apply: https://jobs.ashbyhq.com/luxor/8d215a01-8cac-4b0e-add6-507db...

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.

SingleStore | Software Engineer, AI Platform | Full Time, Remote India

SingleStore is a distributed SQL database built for high-performance transactional and real-time analytical workloads. As data systems evolve, we’re building the platform for AI applications that operate directly over enterprise data, including retrieval, reasoning, agent workflows, and intelligent automation.

Our AI Platform team works at the intersection of distributed systems, cloud infrastructure, and applied AI. Some of the technical problems we’re working on include:

- Agent runtimes, orchestration, and MCP-style tool integration

- Retrieval/RAG pipelines, embeddings, and vector search

- Model integrations, evaluation, and observability

- Secure multi-tenant AI infrastructure

- Reliability, latency, cost controls, and scaling AI systems in production

Our stack includes Go, Python, Kubernetes, cloud infrastructure, distributed systems, APIs, and modern AI/ML tooling.

We’re currently hiring a Software Engineer located in India to join the AI Platform team, along with several other roles across SingleStore.

Careers page with all open positions: https://grnh.se/ipvpz7d61us | https://www.singlestore.com/careers/jobs/

If you want to learn more about the engineering work we do, check out https://www.singlestore.com/blog/category/engineering/.

Feel free to email me directly via pkhaitan at singlestore dot com.

Chief Growth Officer — Comograph

Comograph is building the global Proof-of-Work network for human capability.

We’re looking for an experienced growth/sales leader to join our founding team and help take Comograph to its first customers.

You’ll own:

* B2B growth and go-to-market * Finding and closing early employer customers * Partnerships and strategic relationships * Building our first repeatable sales engine * Working directly with the CEO and founding team

We’re looking for someone who has actually brought customers to an early-stage company, and knows how to open doors, sell, build relationships, and execute without waiting for instructions.

Compensation: Equity-only at this stage. No salary yet.

This is a true founding opportunity. You won’t be joining an existing growth team, you’ll build it.

If you’re interested, send your CV/LinkedIn to ceo@comograph.com and a short note about what you’ve previously grown and how you’d get Comograph its first 10 paying employers.

Mattermost | Remote (US and Canada) | FT | Multiple roles

Mattermost (https://mattermost.com) is an open-core collaboration and workflow automation platform for air-gapped, on-prem and private clouds. Our customers are in defense, intelligence, security and critical infrastructure, including the USAF and NASA. Y Combinator led our Series B, their largest open-source investment at the time.

Both openings are full stack on the core platform: Go backend, React/TypeScript frontend, PostgreSQL and Redis. The codebase is public (https://github.com/mattermost/mattermost), so most of what you build is too. We would rather hire people who ship and own complex software end to end than chase an exact stack match, so any systems or backend language and any frontend stack counts. What we look for in both roles: REST and WebSocket APIs with real networking fundamentals (HTTP, connection lifecycle), and relational databases including schema design and query optimization.

We use coding agents daily (Claude Code, Cursor, and others) at every stage of the work: planning, building, reviewing, testing, and shipping. We treat that as core craft rather than a shortcut around the fundamentals. If you have a track record of shipping and owning complex software end-to-end, we want to hear from you.

Senior Full Stack Engineer $142,723 - $172,723 USD Architect and ship full stack features end to end, own the testing strategy for what you ship, and build internal tooling and testing infrastructure that makes the rest of the team faster. You will work without close supervision and hold the security and compliance bar our customers require. Nice to have: distributed systems and high availability architecture, regulated-environment security, open-source contributions, experience on remote-first teams.

Join our team: https://job-boards.greenhouse.io/mattermost/jobs/5379251008

Staff Full Stack Engineer $172,724 - $227,135 USD Set technical direction for the platform rather than for a feature area: architecture and roadmap across the stack, the standards for how the org uses coding agents, and the strategy for internal tooling and testing. You will influence direction across teams, partner with security and compliance on it, and mentor senior engineers. Nice to have: staff, principal or tech lead experience elsewhere, open-source maintainership, FedRAMP or ITAR familiarity, defense or critical infrastructure background.

Join our team: https://job-boards.greenhouse.io/mattermost/jobs/5405811008

Both roles have Canadian postings: https://job-boards.greenhouse.io/mattermost

Overjoyed to partner with Menlo Research's brilliant founders to recruit founding engineers for our open-source humanoid startup! We're delighted to build Asimov in public with a global developer ecosystem. Senior GTM and engineering referrals are tremendously appreciated! I'm open to emails and matcha/coffee conversations. Tremendously appreciative for the opportunity and exhilarated to advance the future of humanoids in public with our wonderful international team We're based in Singapore and Palo Alto. Our high priority roles are the #1 Founding Research Partnerships Lead as well as founding engineers. Enclosed are our careers, and please examine our Go-To-Market, Brain, Hardware, Software, Manufacturing, and "Wildcard" subsections. Thank you so much! https://menlo.ai/ https://menlo.ai/careers

Founding Sr Research Partnerships: https://jobs.ashbyhq.com/menlo/2a6e8b38-80c2-4886-b863-ef44c... Research Partnership role is based in Palo Alto (hybrid)

We always encourage multiplicities of cultures, intellectual density, undiscovered genius, and AI engineering talent! Please email resumes to hannahft@alumni.stanford.edu and directly apply to Ashby!

Koop AI | Senior Software Engineer | NYC/JC Hybrid | $150k-$180k base + Equity

Koop provides insurance for robotics businesses as well as compliance implementation (www.koop.ai), in addition to other new products that we are exploring.

Looking for golang background (typescript a plus), good DS&A, and attention to detail. You will be helping modernize our product, adding LLM powered features throughout the stack, building engineering systems that leverage LLMs to improve the engineering experience, and have the freedom to approach everything with a critical eye.

I've recently joined as CTO and am building out the US team, and the pace of development has accelerated dramatically. I have a golang and C++ systems background myself, and am enjoying shipping code here.

If you're interested in joining a fast paced, high ownership environment with immediate business impact please email me directly at engineering at koop dot ai with your resume, or apply here: https://www.linkedin.com/jobs/view/4473527631

Sundream Studio | Multiple Roles | Full-time / Contract | NYC / Remote

  Sundream Studio is an AI filmmaking app that makes it impossibly easy to create long-form AI video content.

  Try it here for free: https://sundream.studio

  We’re hiring:

  • AI Video Content Creators — make films, ads, and tutorials with Sundream, experiment with new models, and help shape our creative workflows.

  • Software Engineer — build the assistant, generation infrastructure, and editing tools that turn creative decisions into finished videos.

  • Go-to-Market — help filmmakers, creators, and businesses discover Sundream through content, community, partnerships, and growth experiments.

  • Engineering Manager — lead technical execution, grow the engineering team, and stay close to the product and code.

  • Product Designer — make a complex filmmaking workflow feel understandable, fluid, and enjoyable.


  Reach out directly at stefan@sundream.studio with the role you’re interested in, a little about yourself, and something you’ve built, designed, or created that you're proud of. Thanks :)

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!