Ask HN: Who is hiring? (April 2026)

ThreatMark protects >50M end users from finacial fraud and saves > $100M every year in losses. We are working with top banks in EU and US to protect their end users. We develop large-behavioral models that recognizes returning users by their mouse movements, keystroke timings and sensoric data (accelerometer, gyroscope).

We detect cyberthreats (e.g. malware, phishing, scraping) by exploiting browsers/sandboxes of devices. We manage ~PB scale of data and provide realtime scoring in milliseconds driving authentication/authorization flow (2nd factor).

Stack: [python, typescript, rust], [redis, postgresql], [aws, terraform] ...

We are looking for exceptional engineers to build with us and be part of the success:

- Backend Engineer [rust, python] - low-latency stream processing engine, rewrite python microservices to rust

- DevOps Engineer (IaaC in AWS)

If you are interested, please email us @ career@threatmark.com with subject "HN Who's Hiring"

If you don't find the right role here or at https://www.threatmark.com/careers/, write us anyway if you believe you can be good fit :)

Krystof Hilar, Co-Founder & CTO

Flow Traders is a leading proprietary trading firm with an entrepreneurial and innovative Tech culture at the heart of its business. We are looking for Research Engineers in our Hong Kong office.

Join us build and scale the research framework behind our systematic trading models. You’ll work closely with Quantitative Researchers, drive end‑to‑end ML pipelines, and shape global standards for data‑driven model development. Research Engineers have joint responsibility for conducting research and delivering models.

You’ll thrive if you have: - 8+ years in ML / Data Science / Research Engineering (Postdoc/Faculty can count towards this); - Strong Python and libraries such as Ray, numpy, PyTorch, and pandas; - Solid math/stats background; - Experience with modern dev practices & cloud technologies.

If you're interested, apply here: https://lnkd.in/dWhh_m28

Or if you'd like to see other roles at Flow Traders, please check our careers website: https://flowtraders.com/careers/

We enforce Zero Standing Privileges across cloud and SaaS — AWS, GCP, Azure, Snowflake, Okta, GitHub, and more. Access is requested just-in-time and disappears when the job is done. We are a small team and AI is core to how we work.

This role sits between customers, the CEO, and engineering. You'll build real multi-cloud demo environments (not toy setups), run technical sales conversations, own customer onboarding, and create technical content grounded in actual depth. When you find a product problem, you'll file it and often see it fixed the same week.

You should have: Comfort scripting and hitting APIs to automate your own work Basic cloud familiarity (AWS, GCP, or Azure) — you know what a role and a service account are

Experience in customer-facing technical conversations A habit of publishing: blog, GitHub, videos, etc

Bonus: IAM/cloud security background, experience with agentic AI/LLM workflows, GCP stack (GKE, Cloud SQL, Cloud Run)

Pre-Series A means your work directly shapes product and GTM. Cloud access management is one of the fastest-growing problems in security — this is a good place to build expertise at the center of it. Interested? Contact us careers (at) trustle.com | https://trustle.com