Ask HN: Who is hiring? (September 2025)

Oneleet (YC S22) | Multiple Roles | US & NATO Countries | Remote | Full-time

Oneleet is an all-in-one cybersecurity startup that has built its own Attack Surface Monitoring (ASM), Code Scanner, Device Monitoring, and Compliance Platform. We are growing at an unprecedented pace and working on some very exciting projects.

What we're looking for:

Strong problem solvers who can work independently in a remote environment - Security-minded professionals passionate about building robust, scalable systems - Comfortable working during Eastern Time

Tech stack: Go, TypeScript, React, Kubernetes

Open roles:

* Software Engineer, Backend

* Software Engineer, Cloud Security Posture Management

* Application Software Engineer, Endpoint Security

* Security Program Manager (EU Timezone)

* Technical Sales (must have background in Computer Science or Cybersecurity)

* Invoicing Coordinator

We offer:

- Competitive salary - Equity in a fast growing cybersecurity startup - 100% remote work - Company offsites every quarter (past offsites have been in The Netherlands and Italy)

If you're interested in joining our team, please reach out to samuel<at>oneleet<dot>com with the subject line "HN: <Job Title>".

Alternatively, you can also apply at https://www.ycombinator.com/companies/oneleet/jobs

Radar Labs | Software Engineers (SRE, data platform, backend, full-stack, mobile) | Remote (US), NYC | Full Time | https://radar.com

- Radar Labs is the geo-location dev tool. - Doing 1B+ API calls per day - Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).

- We're based in NYC with our HQ in Union Square and remote friendly (US).

Interesting things we're working on:

- HorizonDB, our Geospatial database written in Rust

- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband and other sensors and ML.

- Extracting raw map data from satellite maps and the web leveraging ML and AI

- Anomaly detection to identify spoofed locations

- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time

- Multi-Region AWS K8s deployment, 99.99%+ availability

- Frontend tools to visualize and debug location data at scale

Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com

Humaans (YC W21) | Engineering Leads, Senior Full-Stack Engineers | London (Hybrid, 3 days/week) | Full-time | https://humaans.io/

Hello! Co-founder of Humaans here. We’re building a best in class HR platform that automates people operations end-to-end for globally scaling companies.

What you’ll work on:

* Agentic AI for end to end automation and AI functionality all over the product

* Modern client rich UIs including workflow builders, drag-and-drop task managers, collaborative spreadsheets

* Realtime systems via WebSockets, Feathers.js, zero sync engine

* Scaling our data and AI architecture to fly for customers with 1,000s of employees

Why we like it here:

* Quality-first culture - design, performance, and DX matter

* Small, senior team with ownership from product definition to release

* Backed by great partners (YC and execs from Slack, Shopify, Figma, LinkedIn, Stripe, Intercom, Notion, etc.)

Our stack:

* TypeScript, React, Node.js, Postgres, Redis

* Monorepo with Turborepo, pnpm, GitHub Actions, Kube and CloudRun on GCP

Apply here: https://jobs.ashbyhq.com/humaans?utm_source=7nNGnERWLP

Count | Senior Software Engineer | REMOTE within UK/Europe | Full-time | https://count.co | £100-140k + Equity

Count is like Jupyter, Tableau and Miro combined in one tool. Some of the world's leading data teams use it for everything from iterating data models and performing in-depth analyses to creating process flow maps of their entire business.

We're a small team looking for experienced software engineers who are interested in tackling deep technical challenges in the data analytics space.

For the best possible user experience, we have developed various technologies in-house, including a custom WebGL rendering engine, our own data visualization library, and a reactive SQL/Python notebook and database query framework.

Example projects: leveraging agentic workflows in data exploration, accelerating rendering using quadtree tiling, extending interactivity and customizability of visualizations, developing serverless frameworks for executing database queries at high concurrency.

Our tech stack: TypeScript, Python, Node, WebAssembly, WebGL, Apache Arrow/Parquet, DuckDB, Kubernetes, React.

For more details and to apply: https://jobs.ashbyhq.com/count

ScribbleVet (https://scribblevet.com) | Full-stack, former technical founders | Full-time | Remote (must be able to work US timezones)

ScribbleVet is an AI-powered scribe for veterinarians. We save veterinarians two hours every day, reduce veterinary burnout and help animals get better care.

* We're generating real ($XM/yr) revenue

* Our users love the product

* We're fully remote but not asynchronous, so we have a lot of autonomy but it's easy to collaborate with someone when needed.

We're looking for:

* Senior engineers (former founders or early startup experience strongly preferred) who can work across the stack.

* Engineers with a product mindset. Customer-centricity or design skills are a plus.

Our tech stack: Postgres, Elixir (+ Ash framework), React Native/Expo, React/Nextjs

We’ve found that the engineers who are happy and successful at Scribble really enjoy technology (learning new frameworks, experimenting with cutting-edge platforms) and are very product-oriented.

If you're interested in building AI-driven features that help vets and the animals they care for, check us out here: https://excessive-grey-9af.notion.site/Senior-Full-Stack-Fro...

Konvu | https://konvu.com/ | Software Engineer | FULLTIME | ONSITE | Paris, France

At Konvu, we’re on a mission to make security invisible. As we move towards a future dominated by code automatically generated, tested, and deployed by AIs, we need a new paradigm for application security. Vulnerabilities must be automatically detected, prioritized, and remediated.

Behind Konvu are founders with deep roots in the security industry. As early employees at Sqreen YC W18, a notable security startup acquired by Datadog, we have firsthand experience in driving security solutions from concept to global impact.

We’re looking for:

* Product Engineer https://jobs.ashbyhq.com/konvu/be7be978-08be-4672-a9e5-a559e...

* Product Engineer (AI Agents) https://jobs.ashbyhq.com/konvu/be028b43-a7a7-4f0a-b968-320dd...

* Founder Associate https://jobs.ashbyhq.com/konvu/36074d15-1958-48e7-8fa4-96fd7...

Read more about how we're building Konvu the YC-way: https://konvu.com/blog/yc-culture

eventfirst | Senior Full-Stack Engineer | Berlin, Germany | REMOTE (CET) | Full-time

We are applying AI to organize corporate events.

We are looking for a senior engineer with at least five years of full stack experience, a strong focus on product and UX, and optionally some experience building LLM based products. Currently we are focussed on building tooling that enables us to capture domain knowledge from experts to streamline prompt creation and evaluation. Our tech stack is Typescript, React, Next.js and Tailwind. On the backend we use Drizzle with Neon, deployed and monitored via Vercel. We have pre-seed funding from a major US VC and are experienced founders. You’ll be working alongside the founders (ex-Apple, ex-Airbnb, ex-Tulip, ex-Tourlane) and will have a chance to shape the company, product and of course the engineering culture.

Apply here: https://taskwise.jobs.personio.com/job/1646275

Tandem Health | Senior/Staff Software Engineers | On-site in Stockholm, Sweden | Full time

At Tandem Health we're building a clinician copilot to allow clinicians to focus on care rather than administration. We’re building, launching and iterating quickly, and already have >2000 organizations using our product.

Our core product listens in to the patient-clinician encounter to generate medical records, allowing clinicians to save 5-10 minutes per patient. No longer do clinicians have to catch up on administration after hours. Some even tell us that their partners notice they're much more relaxed after starting to use our product, and we couldn't be happier :)

We just raised a $50M Series A and are now expanding our Stockholm team with exceptional engineers! We use Python (backend), TypeScript/React (frontend) and C# (Windows app) and our infrastructure runs on Kubernetes in Azure. We're scaling rapidly in terms of # of users and are especially keen to talk to seasoned backend, data and infrastructure engineers.

Even if we don’t have a role out for your specific skill set, we’d love to talk! Our tech team is small but growing and you’ll have an outsized impact on an important problem.

More info at https://www.tandemhealth.ai/recruitment

Feel free to reach out to john.moberg@tandemhealth.ai if you have any questions

Rinse | IT Manager / Network Administrator / System Administrator | Hybrid in SF Bay Area, Los Angeles, New York (Brooklyn), Boston, Chicago, Seattle, Washington DC, or Newark. (Primarily remote with some on-site responsibilities.) | Full-time | https://www.rinse.com

Rinse provides dry cleaning and laundry delivery services to customers in eleven metropolitan areas in the US. We have sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. We're now over a decade old - this is a stable, yet consistently growing and innovating, company.

Given our distributed nature, we have growing network and workstation infrastructure, and it's time to hire our first full-time leader to manage this system. The ideal candidate can:

- Operate with autonomy and integrity across network, server, infrastructure, and desktop environments

- Communicate cross-functionally, to internal stakeholders at all levels

- Navigate our (primarily Linux) technical environment

- Spearhead projects to improve our technology's security, reliability, and functionality

- Facilitate our corporate efficiency via desktop administration

Because this role has some physical hardware responsibilities, we'd prefer it be filled by someone in the above localities, even though the vast majority of the role can be performed remotely.

We're open to both newly-graduated or more senior technically-minded individuals and managers, provided they meet our bar.

Search term bingo: Logistics, Linux, Python, Ansible, Systems Administration, Network Administration, Information Technology, Amazon Web Services, AWS, Cloudflare, Automation, Security, Systems Engineer.

https://www.rinse.com/careers/it-associate/

https://www.rinse.com/careers/it-manager/

Dash0 | Multiple roles | FULLY REMOTE | Full-time | Salary + equity

Dash0 is a fast-growing, venture-backed startup on a mission to make observability radically easier for every developer.

We fully embrace OpenTelemetry, Prometheus, and open standards, and our “welcome present” to the OpenTelemetry community, OTelBin, a free tool for editing, visualization and validation of OpenTelemetry collector configurations, is being extremely well received by the community.

We’re currently hiring in multiple roles across engineering, design, and product:

* Senior Product Engineer – Backend (Remote EU)

* Senior Product Engineer – Kubernetes Operator (Remote EU)

* Senior Product Designer – Observability (Remote EU)

* Senior Technical Writer (Remote)

Apply here: https://careers.dash0.com/

Terrace Networks | Security Data Systems Engineer | REMOTE (US) | https://www.terracenetworks.com

We’re hiring engineers to build the next generation of large-scale network threat intelligence. Our distributed vantage point is one of the world’s most diverse, and we’re using AI to make sense of global attack data in real time.

I’m Eric, co-founder and CEO. Our founding team includes researchers with decades of security experience and multiple successful startup exits.

We’re looking for full-time engineers who thrive at the intersection of systems, security, and machine learning. Ideal candidates bring a strong background in systems engineering, familiarity with modern ML for text/log analysis, and interest in automated response systems (e.g. LLM-based agents for classification, triage, response). Proven success working remotely is a plus.

We've recently closed our seed round; pay+equity will be based on experience and fit.

*Tech:* Go, Linux, TCP/IP internals, Terraform, DynamoDB, LLMs (Claude, etc.)

Apply here → https://www.terracenetworks.com/careers

Brilliant.org | Software Engineers & Designers | Remote (North America), SF, NYC | Full-time | $170k — $235k | https://brilliant.org

Brilliant is building world-class interactive learning experiences that combine challenging problems, compelling narratives, and delightful visual storytelling.

We're hiring engineers and designers to help craft the next generation of interactive learning and change how the world learns.

Engineers at Brilliant think about both "building the right thing" AND "building the thing right" while pursuing high standards of excellence for ourselves, our product, and our codebase.

Our designers craft interaction patterns that make hard math, science, and computer science concepts feel approachable, delightful, and addictively learnable.

If you're energized by the prospect of doing the best work of your career and changing how the world learns alongside the most talented peers you've ever worked with, you can learn more and apply here: https://brilliant.org/careers.