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kyry_cz

18 karma · joined September 17, 2018

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kyry_cz··on Ask HN: Who is hiring? (May 2026)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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, build new detection features

- 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

kyry_cz··on Ask HN: Who is hiring? (April 2026)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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

kyry_cz··on Ask HN: Who is hiring? (October 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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:

- Research Team Lead [hands-on role] (leading world-class ML engineers to success - focus, context translation, project management, measurement, ...)

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

- DevOps Engineer (IaaC in AWS)

- DevSecOps Engineer (blue team - designing, implementing secure infrastructure)

- Engineering Team Lead [hands-on role] (structure, organize, help, elevate) - lead of team dealing with backend - low tail latencies, distributed systems, petascale

- Product Manager (self driven, tech-enabled go-getter - expert on fraud and/or scaling a startup from product perspective)

We are also looking for other key roles:

- CRO - be responsible for growth in US & EU

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

kyry_cz··on Ask HN: Who is hiring? (August 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity 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:

- Research Team Lead [hands-on role] (leading world-class ML engineers to success - focus, context translation, project management, measurement, ...)

- Engineering Team Lead [hands-on role] (structure, organize, help, elevate) - lead of team dealing with backend - low tail latencies, distributed systems, petascale

- DevSecOps Engineer (blue team - designing, implementing secure infrastructure)

- Product Manager (self driven, tech-enabled go-getter - expert on fraud and/or scaling a startup from product perspective)

- DevOps Engineer (IaaC in AWS)

We are also looking for other key roles:

- Chief Revenue Officer - be responsible for growth in US & EU

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

kyry_cz··on Ask HN: Who is hiring? (July 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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:

- Research Team Lead [hands-on role] (leading world-class ML engineers to success - focus, context translation, project management, measurement, ...)

- Engineering Team Lead [hands-on role] (structure, organize, help, elevate) - lead of team dealing with backend - low tail latencies, distributed systems, petascale

- Senior Data Engineer (datalake, ETL pipelines, MLOps...)

- DevSecOps Engineer (blue team - designing, implementing secure infrastructure)

- Product Manager (self driven, tech-enabled go-getter - expert on fraud and/or scaling a startup from product perspective)

- DevOps Engineer (IaaC in AWS)

We are also looking for other key roles:

- Chief Revenue Officer - be responsible for growth in US & EU

- Talent Hunter - looking for exceptional people (mostly engineering roles) - either people with experience (experts) or juniors with passion, drive and potential

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

kyry_cz··on Ask HN: Who is hiring? (May 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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 join our team and be part of the success:

- Senior Data Engineer (datalake, ETL pipelines, pyspark...)

- Engineering Team Lead

- DevSecOps Engineer (blue team - designing, implementing secure infrastructure)

- Research Team Lead (leading world-class ML engineers to success - focus, translation, project management, measurement, ...)

- Product Manager (self driven, tech-enabled go-getter)

- 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 at https://www.threatmark.com/careers/, write us anyway if you believe you can be good fit :)

Krystof Hilar, Co-Founder & CTO

kyry_cz··on Ask HN: Who is hiring? (February 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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 join our team and be part of the success: - Principal Software Engineer (experience with petascale, distributed systems, low tail latencies)

- Senior Data Engineer (datalake, ETL pipelines, pyspark...)

- QE Engineer (pipelines, automated release, chaos engineering, network harness...)

- Engineering Team Lead ...

If you are interested, please email us @ career@threatmark.com with subject "HN Who's Hiring" If you don't find the right role at https://www.threatmark.com/careers/, write us anyway if you believe you can be good fit :)

Krystof Hilar, Co-Founder & CTO

kyry_cz··on Ask HN: Who is hiring? (January 2025)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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 join our team and be part of the success:

- Principal Software Engineer (experience with petascale, distributed systems, low tail latencies)

- Senior Data Engineer (datalake, ETL pipelines, pyspark...) ...

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

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

Krystof Hilar, Co-Founder & CTO

kyry_cz··on Ask HN: Who is hiring? (December 2024)
ThreatMark | Security, Machine Learning | REMOTE(World) / Brno, Czech Republic | Equity

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 join our team and be part of the success:

- Principal Software Engineer (experience with petascale, distributed systems, low tail latencies)

- Senior Data Engineer (datalake, ETL pipelines, pyspark...) ...

If you are interested, please email us @ career@threatmark.com with subject "HN Who's Hiring" If you don't find the right role at https://www.threatmark.com/careers/, write us anyway if you believe you can be good fit :)

Krystof Hilar, Co-Founder & CTO

kyry_cz··on Machine learning finally comming to Hobbiton - a guide on logistic regression
Logistic regression re-discovered incl. binary cross-entropy cost function, gradient descent, including all the math needed for that. It's assumed that you can sum and multiply two numbers.
kyry_cz··on Searching for similar objects with metric spaces and Vantage Point Trees
Thank you. I believe that now the article deserves an update :)
kyry_cz··on Searching for similar objects with metric spaces and Vantage Point Trees
Let's explore searching in metric spaces a indexing structure called Vantage Point Trees
kyry_cz··on Ask HN: Who is hiring? (April 2019)
ThreatMark | Software Engineer, Security, Machine Learning | Remote | Brno, Czech Republic

When someone steals your credentials, whether it is bank, crypto account or email, it is unpleasant experience. Our goal is to remove fraud and simplify authentication in online world. We develop threat detection (e.g. malware, phishing, scraping) with behaviour biometry which recognizes returning users by their mouse movements, keystroke timings and sensoric data. We manage dozens of TB of data and provide realtime scoring in milliseconds driving authentication flow (log in / 2nd factor).

Stack: python, javascript, sklearn, cassandra, kafka, redis, kafka, docker

DevOps: linux, ansible, terraform, aws, openstack, prometheus, grafana

Data: Random forests, gradient boosting, markov chains....

We are three years on market, backed by two VCs and we are going to have about 4M$ revenue this year. Even that we work with top EU banks and goverment agencies we are NOT a corporate ourselves. I still code with the team, we just have fun, solve hard problems and get stuff done !

Are you tech/security enthusiast ? Do you often live "in the flow" and loose track of time ? You know what happens, when EIP register points to address with 0xCC ? Could you implement O(n*log(n)) sort ? We are looking for bright minds to join our engineering and data science team.

We are looking for positions:

- Software engineer (python)

- DevOps engineer / Cloud operations engineer

- Product reliability engineer

- Data scientist

If you are interested, please email me @ krystof.hilar@threatmark.com with subject "HN Who's Hiring April 2019" Krystof Hilar, Co-Founder & CTO

kyry_cz··on Ask HN: Who is hiring? (October 2018)
ThreatMark | Full-Stack Engineer, Machine Learning | Remote | Czech Republic

When someone steals your credentials, whether it is bank, crypto account or email, it is unpleasant experience.

Our goal is to remove fraud and simplify authentication in online world.

We develop threat detection (malware, phishing) with behaviour biometry which recognizes returning users by their mouse movements, keystroke timings and sensoric data. We manage dozens of TB of data and provide realtime scoring in milliseconds driving authentication flow (log in / 2nd factor).

Stack: python, sklearn, javascript, kotlin, cassandra, redis, docker, openstack, kubernetes, prometheus, grafana Data stuff: Random forests, gradient boosting, markov chains....

We developed in-house:

- Device fingerprint recognizing returning devices without any persistence

- Behavioral biometry

- Dynamic JS obfuscator

We are three years on market, backed by two VCs and we are going to have about 2M$ revenue this year. Even that we work with top EU banks and goverment agencies we are NOT a corporate ourselves. I still code with the team, we just have fun, solve hard problems and get stuff done !

Are you tech/security enthusiast ? Do you often live "in the flow" and loose track of time ? You know what happens, when EIP register points to address with 0xCC ? Could you implement O(n*log(n)) sort ? We are looking for bright minds to join our engineering and data science team.

We are looking for positions:

- Software engineer

- Data scientist

If you are interested, please email me @ krystof.hilar@threatmark.com with subject "HN Who's Hiring October 2018"

Krystof, Co-Founder & CTO