10x Genomics | Software Engineer(Multiple Roles) | Remote(US) or Pleasanton, CA | Full-Time

We make instruments and software that enable scientists to study biology at single-cell resolution. Our technology features in over 7,000 scientific publications (https://www.10xgenomics.com/resources/publications), and is used across the world by top research institutions, hospitals, and pharmaceutical companies to study cancer, immunology, developmental biology, and more.

Our user-facing applications - which include the public website, a web-based analysis platform, visualization apps, instrument UIs, and more - have React/Typescript frontends and Golang backends, with Rust + C++/CUDA for analysis algorithms. Our instrument control software, which automates complicated microfluidics, motion, and imaging subsystems are written in C++, Python and Golang. If you want to use your software skills to push forward the frontiers of biology, please check us out.

Our tech stack includes: C++, CUDA, Rust, Go, Python, Typescript, Bazel, etc

Open Roles:

- Staff Software Engineer

- Software Engineer III - Frontend

- Senior Software Engineer - AI Solutions

- Staff Software Engineer - AI Solutions

I'm a Sr. Staff Software Engineer here. Happy to answer questions you might have, I'm easy to find on LinkedIn if you need to know more.

Apply: https://careers.10xgenomics.com/careers?department=Engineeri... Website: https://www.10xgenomics.com

Datadog | Software Engineers | ONSITE (Boston, Lisbon, Madrid, NYC, Paris, Tel Aviv) | Full-time

Datadog is a monitoring, tracing, logs system, and more, for your infrastructure and services. We build our own tsdb, event store [1][2], distributed tracing tools, cutting edge visualizations, and more. We love shipping great experiences for customers just like us and are growing fast! We write a lot of Go, Java, Python, Typescript (with React), and a bit of other languages. We run on k8s, and are multi-region and multi-cloud.

We're looking for people who can build systems at scale as we process trillions of events per day. Let us know if that's you!

https://dtdg.co/hnwhoshiring

[1] https://www.datadoghq.com/blog/engineering/introducing-husky

[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive

Moov | Multiple Roles | Fully Remote

Moov powers infinite payment use cases with full data transparency. However you decide to orchestrate the motion of money: pay by bank, pay by card, disburse to a Moov wallet or linked bank account with same-day ACH or RTP®, or spend with an issued card—we’ve got you covered.

"Moov has become an integral part of our strategy at Jack Henry. Their platform’s developer-first approach allows us to innovate quickly and stay ahead of industry demands. Moov’s world-class engineering and design team has deep experience navigating complex payment infrastructure, which helps us win because we’re able to focus on building exceptional customer experiences." – Ben Metz, CTO, Jack Henry

Our technology stack includes: Go, PostgreSQL, AlloyDB, Spanner, Kubernetes, Docker, GCP, OpenTelemetry, Kafka, and more.

Open Roles:

- Senior Software Engineer ($165k–$185k)

- Senior Software Engineer – Front End ($145k–$160k)

- Director of Risk Operations ($175k–$190k)

- Account Manager (Base $120k–$140k, Commission $60k, OTE $180k–$200k)

- Enterprise Account Executive (Base $155k–$175k, Commission $150k, OTE $305k–$325k)

Don't see your preferred role? Email careers@moov.io with your resume.

Apply: https://moov.io/careers/#open-roles

Website: https://moov.io/

Actively AI| Multiple Roles | In office in NYC | Salary + Equity

What Cursor has done to revolutionize coding, we are looking to do for revenue. Every large company spends 40-50 cents of every dollar they earn on sales & marketing, and it’s very inefficient because data lives in so many different systems, sales reps are stretched thin doing manual work, and products are rapidly evolving.

It’s why we are building the agent and intelligence framework for enterprise scale GTM that guides every sales motion across the funnel — from SDR outreach to AE deal strategy to cross-sell and expansion. It’s an intelligence layer that sits on top of every sales tool and with external browsing that is then customized to your specific products & GTM motions.

It’s a massive technical challenge: - Intelligence at scale: modeling millions of accounts, real-time signals, and contextual history into per-account reasoning agents. - AI Agents & Chat: designing systems across “push” (recommendations) and “pull” (interactive assistants), with extensible skills customers can train themselves. - Data & Infrastructure: creating a new framework for real-time, per-customer agents that simplifies pipelines, scales efficiently, and cuts costs (we’ve already cut cost per account by 50% through smarter eval-driven approaches). - Wall-to-wall product: from self-serve UI to Slack integrations, from predictive models to generative copilots — we’re building an AI operating layer for GTM.

Why Join Engineering at Actively: - Customer-driven impact: engineers directly go onsite and spend time with customers, deploying agents that reshape workflows at companies like Samsara and Justworks. - Category creation: there’s a huge opportunity to build the pre-dominant AI company for GTM with a massive TAM - Cutting-edge AI: opportunity to push the frontier of reasoning agents, eval-driven development, and scalable intelligence. - High-caliber peers: we’re ex-Instacart, Scale AI, Stanford AI researchers, and operators who’ve built at scale before.

Open roles: https://www.actively.ai/careers

Rectangle | Chicago (US), or US remote in SF and NY | Full-Time | Salary + Equity

We're looking to hire a dedicated full-stack engineer at Rectangle.

If you are (or know!) someone who has thought deeply about distributed coordination, have strong opinions on conflict resolution, or get excited about building systems that are resilient to crazy amounts of chaos, I'd love to talk to you!

Over the last few months we’ve been investing heavily in building our internal infrastructure to power automation, integration, and visibility across the supply chain. We’re rapidly onboarding new customers and are looking for an engineer who’s excited to build alongside them.

You’ll be working directly with customers, solving real-world problems, and scaling the solutions you build. The products you own end-to-end will coordinate billions of dollars of freight, and unlock real revenue and efficiency for leading tech-enabled logistics companies.

This is a great opportunity for someone who loves to operate 0 → 1 while also being directly involved in shaping our platform strategy as we keep stacking investments we’ve made into our infra layer.

Stack: Typescript, Go, Kafka, SQL, AWS

Email hn [@] rectanglehq.com or or submit a POST request to challenge.rectanglehq.com and see what happens :)

https://rectanglehq.com

Hardfin | Full-stack engineer | Denver metro, CO or Bay area, CA (REMOTE or ONSITE) | CA/CO ONLY | Full-time | 150k-180k salary (DOE)

Hardfin is a B2B software platform for equipment manufacturers that enables them to track their assets and manage projects for their hardware. We are looking to add another fullstack engineer that can wear a bit of a product hat and is comfortable with "figuring it out" as they build.

Short and transparent hiring process, 30 min intro call, 30 min tech screen, 30 min vision/product call, 2hr technical test, 45 min culture fit call, offer. No panels, no leet code questions.

Requirements: 5+ YoE, 3+ Go, 1+ Typescript, 6+ months of working with AI assisted IDE/tooling. Requirements are not firm, but you will be asked questions about Go and Typescript and it would be difficult to pass the tech screen without the experience.

IMPORTANT: - You must be located in CA or CO, this isn't negotiable; ideally you are in the Oakland/SF or Denver area. We do not provide relocation. - We do not have the ability to process or handle sponsorships at this time (visa's of any type) - you must be a citizen, permanent resident, or have work authorization that isn't tied to employment (IE refugee status).

See the full job rec/apply at https://wellfound.com/l/2Bs5iM

You can reach me directly at bweisbart -at- hardfin (.) com, please include "HN" in the email subject so I can prioritize a response to you. We respond to all candidates (no voids) as long as you meet the the eligibility requirements.

FunnelStory | Principal Architect (Go / Golang) | REMOTE (India) | Bengaluru | Full-Time | 55-85 LPA | https://funnelstory.ai

I'm Preetam, co-founder and chief architect of FunnelStory. We're looking for exceptional back-end engineers to build and scale our AI SaaS product.

FunnelStory is an AI-first customer superintelligence platform. We're a small (<20 people), fast-growing, VC-backed, early-stage startup, and we're gaining traction with enterprise customers. We're looking for architects/engineers to join our team that's building next-generation AI platforms using Go.

This is a great fit if you have:

* Deep expertise in Go.

* A strong architectural background, with experience designing and scaling complex systems.

* Expertise with relational databases (PostgreSQL) and SQL

* Excitement about taking a high-impact, independent role in an early-stage environment, helping to mentor and uplift the team.

Who we're looking for:

* 8+ years experience in Go, SQL, AWS

* Bias to action, ability to execute independently

* Strong architectural and independent problem-solving skills

* Ability to communicate complex ideas simply

More details + apply: https://wellfound.com/l/2Bn5eQ

Interested? Email me at preetam @ funnelstory.ai with "HN" in the subject.

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

We're a VC-funded startup (just 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.

We're now hiring for our new product, Spacelift Flows, built for more general DevOps (and related) automation - incident automation and response, self-service, slackbots, AI automations, building MCP servers, etc. We like to call it an "Integrated Automation Environment".

You can see a demo video of it here[0] with more videos available in the job post. Tech stack is Go + Postgres backend, along with TypeScript + React frontend.

Overall we have a deeply technical product, trying to build something customers love to use. 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. With the product being in it's early days, it's also a great opportunity to have a large impact!

If that sounds like fun to you, please apply at https://careers.spacelift.io/jobs/6438380-product-software-e...

[0]: https://youtu.be/vZHGg1QIAQk

krea.ai | Distributed Systems Eng. & Data Engineers | San Francisco (on-site), CA

I'm the cofounder & CTO of Krea (https://www.krea.ai). We are a startup in San Francisco building browser-based AI creative tools to improve the workflows of artists, designers, and professional creatives. Small team (~22); millions of active users; and raised over $83M from top Silicon Valley investment firms.

We're looking for talented engineers who want to tackle hard technical challenges with smart people while building a creative platform that big companies and startups will rely on.

The job:

- Build distributed systems to process massive (billions of files, petabytes), amounts of image, video, and 3D data, solving scaling bottlenecks as you go.

- Learn ML engineering from world-class researchers on a small tight-knit team. You’ll contribute to foundation image, video, and world models from 0 → production, and see them used by millions.

- Play with huge Kubernetes GPU clusters; our main GPU cluster takes up an entire datacenter from our provider.

Tech stack: python, pytorch, k8s, a rotating cast of data tools (e.g. DuckDB, massive relational DBs, PyArrow, etc.)

You should apply if you are an excellent generalist engineer with strong backend experience and an intuition for systems design. Bonus points for experience with dist. systems, k8s, and existing ML or data experience (but not required!). Cool side projects are a green flag.

A few links about us:

- Sneak peek of our real-time video model → https://x.com/krea_ai/status/1961074072487620635

- Technical report for FLUX.1 Krea, our first open-source text-to-image model → https://krea.ai/blog/flux-krea-open-source-release

You can contact me at:

  d+hn@krea.ai

Chroma | ONSITE - San Francisco | Full-time | https://trychroma.com

Chroma is the open-source search and retrieval database for AI applications. It's an open-source database with vector, regex, and full-text search. We support local, single-node, and cloud hosting. Help build the future of context engineering!

We're a team of 17, all engineers today. We work in Rust, Python, Typescript, and Go.

We're hiring for these areas:

- Product design

- Production engineering

- Platform engineering (Rust)

- First GTM hire

Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...

More details at: https://careers.trychroma.com

DuckDuckGo | Multiple Roles | Remote | Full-time | $178,500 - $320,000 USD + equity

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.

Most of the software engineering positions have been repeating here for years because we've been continually hiring for them, scaling our whole team to now over 300 people—many of those hires have come through Hacker News. We've been improving our hiring process over time, and we know some good candidates may have fallen through the cracks. Some people who tried in the past have had success going through it again, and we still pay for hiring projects.

Senior Site Reliability Engineer - $178,500 USD + equity — https://jobs.ashbyhq.com/duck-duck-go/9f845ea5-4bdd-432a-826...

Engineering Director, Windows - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/42272bd1-c863-478d-827...

Engineering Director, Web Platform - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/0541f1f3-4302-4b76-93a...

Engineering Director, Browser Platform - $243,800 USD + equity https://jobs.ashbyhq.com/duck-duck-go/0541f1f3-4302-4b76-93a...

Senior Software Engineer, Windows Desktop App - $178,500 USD + equity — https://jobs.ashbyhq.com/duck-duck-go/47e569c6-f995-4955-a89...

Senior Backend Engineer - $178,500 USD + equity https://jobs.ashbyhq.com/duck-duck-go/abb953ee-5bb7-4637-9f6...

Senior Business Development Manager - $200,267 USD + equity https://jobs.ashbyhq.com/duck-duck-go/6a4caa8b-825c-44e3-be3...

VP, Business Development - $320,000 USD + equity https://jobs.ashbyhq.com/duck-duck-go/276ae352-55b5-4fb2-9b9...

https://duckduckgo.com/careers

Fairwater Labs | Founding Engineer for dual-use startup focused on multi-modal data processing at the edge | Remote (US-based) | Full-Time | Competitive salary and significant equity | US authorized only

We are building a cutting-edge product leveraging generative AI and machine learning for multi-modal data processing at the edge.

Why join now? Backing from a dual‑use venture studio. Validated user stories, early wireframes, and early potential users are ready--your code ships to real operators fast. Co-Founder has extensive product background and experience driving go-to-market.

What you’ll do: Own the end-to-end architecture & tech / product roadmap – choose the stack, design data pipelines, secure cloud infra, and front-end. Develop and deploy AI/ML models for edge devices. Implement computer vision. OCR. Create video summarization pipelines to extract key events using transformer-based models or temporal analysis. Multi-modal systems. Edge-to-Cloud

You are:

Full-Stack. Edge AI deployment (ie. NVIDIA Jetson or Raspberry Pi.) Strong background in computer vision, OCR, and multi-modal AI, with familiarity in frameworks like OpenCV or Hugging Face Transformers. GovCloud experience.

Entrepreneur at heart—show us something you’ve built that shipped fast. Send a brief intro (or resume if you have it) + GitHub/portfolio to epsilon@fairwaterlabs.com

Bluesky | Senior Go Engineers, Senior Machine Learning Engineers, Senior React Native Engineers, Fullstack Engineers | Remote | https://bsky.social/about/join

Bluesky is building an open internet protocol (https://atproto.com) and a flagship social app (https://bsky.app). We're a company of 30 with a strong focus on fostering a high-agency, talented team. The golang roles are focused on building the internal platform with a whole lot distributed systems engineering; the ML is working on our many recommender systems and feeds; the RN & fullstack engineers are working on the social app and internal moderation tooling, respectively.

If you think social media - and the internet - could be better, apply here: https://bsky.social/about/join

Zetier | Multiple US locations (VA, PA, FL, TX, CA, NY) | ONSITE | Full-Time

Zetier develops real-world tools and capabilities to secure our nation in the short- and long-term. If you’re excited to delve deep into low-level systems, exploit dev, and more alongside a group of passionate hackers, then we’d love to hear from you.

Open-sourcing our work as much as possible is integral to Zetier and what we stand for. As folks who learned to hack on platforms like Linux, we aim to give back to the OSS community. Not only do we encourage our engineers to contribute, but we go a step further, adding monetary incentives to do so.

We’re looking to find the right people for a range of roles, including:

+ Vulnerability Researcher

+ Android Security Engineer

+ CNO Embedded Engineer

+ CNO Software Engineer

+ IT Security Engineer

+ Senior Technical Lead

+ Business Developer

All open positions: https://zetier.breezy.hr/

Our approach and benefits: https://zetier.com/careers/

Different skill set? Drop us a line at hello@zetier.com

Estuary | US Based / Remote | Full-time – https://estuary.dev/

Estuary is a VC-backed startup building the next generation of real-time data infrastructure. Our platform, Estuary Flow, combines change data capture (CDC), stream processing, and declarative configuration to unify real-time and batch data movement.

We’re open-source, developer-first, and focused on making data engineering radically simpler.

Estuary is a small, high-trust team with deep experience in distributed systems, stream processing, and data tooling — and we’re growing quickly.

We’re hiring for:

Senior and Staff Backend Engineers (Integrations) – 5+ years of backend engineering experience. Proficiency in Go; Rust is a big bonus.

Own and scale high-impact systems that power real-time data pipelines. You’ll work on complex integrations with external APIs and databases, improve our internal connector frameworks, and tackle deep challenges in performance, reliability, and developer experience.

Fullstack Engineer (UI Team) – Our first fullstack hire, working across Rust + React/TypeScript. High-impact role shaping the customer experience: build GraphQL APIs, optimize Rust backend systems, and deliver product features end-to-end.

https://estuary.dev/about/#careers

What we’re looking for: Engineers who care about building reliable, maintainable systems and enjoy working with complex APIs and data flows. We value curiosity, clear communication, and a willingness to learn.

Bonus points for experience with CDC tools, open source contributions, or fast-paced startups.

To apply: Email your resume to careers@estuary.dev

OnFrontiers | Senior Engineer | Hybrid/Remote | NYC or Baltimore

OnFrontiers is hiring a strong senior engineer with experience programming agents to lead development of our agentic intelligence platform for government contractors.

We're looking for a passionate, curious engineer, who wants to work closely with our founding team and contribute as both a technical expert and a member of the product leadership.

In the role, you'll lead development of our indexing services, LLM integrations and APIs, as well as our SaaS platform, as we continue to scale. The role is hands-on but has the potential to grow into management as the team scales.

Core technologies include OpenSearch, Postgres & PGVector, Go, Python and React, all running on AWS.

https://www.onfrontiers.com/job-postings/lead-engineer

Interested, feel free to email me directly: lgsilver[at]onfrontiers.com

Sumble is the newco from the founders of Kaggle. We are hiring software engineers, data engineers, machine learning/ai engineers, growth and a designer.

Can view our roles and apply here: https://apply.workable.com/sumble-inc/

As background, 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 primary destination for accessing high-quality web data. Try the product at sumble.com.

We are a team of 15, including 10 engineers with experience at companies such as Google, Meta, Stack Overflow, and Kaggle.

Cora AI | Founding Engineer | Remote (USA only; Bay Area / CA preferred) | Full-time | $150–200k + early equity

We’re building AI agents that help B2B companies scale customer relationships. We’re already live with several enterprise customers and receiving a lot of positive feedback: “I’m super excited!! You’re changing our lives!!” — Account Manager for emerging-enterprise (mid-market) accounts.

We are backed by Acrew Capital, Emerson Collective, Recall Capital, and angels from LinkedIn, BetterUp, Glean, and Scale AI. Strong pipeline beyond what’s already in production.

Tech: Python, FastAPI, React, Vite, Render (PaaS), Inngest (Orchestration)

Apply if you:

- Have real 0→1 startup experience

- Love digging into the details

- Break fuzzy problems into incremental, shippable chunks

- Ship fast and own outcomes end-to-end

- Can effectively steer and leverage AI IDEs

Why Cora:

- Work on cutting-edge applied AI: voice agents, knowledge graphs, multi-agent systems, simulations, and more

- Real users, real impact, high autonomy

- Fast, fair interview loop — no BS

Learn more: https://www.cora.ai/careers#Our-roles

Interested? Email careers [at] cora.ai — these go straight to me, and I read every one.

WireScreen (Series A) | Senior Software Engineer | NYC - hybrid | Full-time | $165k-$200k base + equity | https://jobs.ashbyhq.com/wirescreen/158fd72f-fc2f-47a3-bdb5-...

WireScreen is a fast-growing Sequoia-backed Series A startup building the go-to open source intelligence platform for navigating global supply chains and China-related risk. While China maintains some of the world’s most detailed corporate ownership records, the real challenge is connecting the dots. That’s where we come in—surfacing the networks, relationships, and financial ties behind companies to support national security, compliance, and regulatory oversight.

We’re hiring on the backend to help solve one of the hardest problems in data engineering: building a production knowledge graph from millions of fragmented, inconsistent Chinese corporate records where traditional approaches break down. Our PySpark/EMR/Airflow pipeline is just the foundation. The real challenges are in entity resolution across transliterated names and obfuscated ownership structures, bipartite matching algorithms and inferring relationships. We build our product on top of that with a Django/FastAPI/React stack to help our users access that knowledge graph to analyze and investigate any risks they should be aware of.

If you have prior startup experience, can bring strong Python (PySpark is a big plus) experience and have previously worked with TB-scale data sets - we’d love to talk to you.

Apply here: https://jobs.ashbyhq.com/wirescreen/158fd72f-fc2f-47a3-bdb5-...

Happy to answer any questions - you can reach out to me here or at leo.green@wirescreen.ai - I'm a recruiter with WireScreen, but if I don't know the answer I'll ping our engineering folks and come back to you fast.