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Security Engineer

Cossack Labs
format:Hybridcompany:Product
application securitysecurity testingthreat modelingburp suiteowasp asvssastdast
pythonbashcryptographymitre att&ck
semantic dedup

Reposted 2× across DOU — deduped to one listing.

metahunt matched 2 postings of this exact role by semantic similarity, so you see it once instead of 2 times.

test task:yes
experience3+ years
domainCyberSec
locationUkraine (Kyiv, Lviv)
> full description

This position is only for Ukrainian residents within Ukraine.

We are looking for an Application Security Engineer to join our Security Engineering team and work with us on building and breaking software. If you are interested in designing and building security controls, working hand-in-hand with software developers, and performing security assessments, this could be the position for you.

We are ready to invest time in your education if you are prepared to work diligently and responsibly. Alongside technical skills, we’ll teach you leadership, time management, business context, and how to keep improving cybersecurity despite the ever-increasing entropy of the world.

Responsibilities:

  • Perform security assessment and review of code and behaviour of systems (web, API, backends).
  • Perform risk analysis and threat modelling.
  • Perform security search for weaknesses and vulnerabilities in software in novel fields and areas.
  • Participate in SSDLC for our products and our customers’ products. Explain risks & threats, work with developers to select security controls that would improve security without restricting usability/performance.
  • Take part in shaping and improving organisation’s security practices together with internal teams and business owners (assessing risks, developing security policies, and helping teams build more secure systems and processes).
  • Communicate about security technical topics with both technical and non-technical audiences (C-level managers, developers, product owners).
  • Dive into application security, infrastructure security, cloud and on-prem infrastructures, dedicated hardware, IoT security, ML security, and weird stuff beyond casual imagination with our team of skilled engineers. Check out an example of our work.
  • Stay updated with emerging security threats, vulnerabilities, and controls by reading articles, papers, and NIST guidelines. Follow CVE updates and understand how the threat landscape is changing.
  • Contribute to open-source standards such as OWASP standards and guidelines.

Requirements:

  • 3+ years as an Application Security Engineer or similar position.
  • Experience in performing security assessment for web applications and cloud systems.
  • Experience designing and implementing security processes and security controls in a technically diverse environment.
  • Be familiar with application security verification and software maturity frameworks: OWASP SAMM, OWASP ASVS, OWASP MASVS.
  • Understanding SSDLC and its difficulties: OWASP SSDLC, NIST SSDF.
  • An overall understanding of what information security is, how real-world risks and threats affect the choice of security controls. How to combine detective, preventive and corrective controls.
  • Experience in popular security tools required for the job, or ability to learn them quickly (Burp Suite, network analysers, various SAST and DAST, dependency and vulnerability scanners).

Nice to have:

  • A certain area of expertise and deep interest in web, mobile, IoT, infrastructure — an area where you have “seen things” and ready to share experience.
  • Basic knowledge in cryptography: understanding the differences between symmetric and asymmetric cryptography, hashing, KDF.
  • Knowledge in one of several business domains: banking finance/payment processing, cryptocurrencies, IoT, hardware and ICS.
  • Understanding security standards and methodologies (NIST, ISO, CMMI, SOC).
  • Understanding risk management and threat modelling (NIST RMF, FAIR, STRIDE, MITRE ATT&CK).
  • Practical experience in scripting languages: Python or Bash.

Our hiring process:

  • Test task
  • Introduction call
  • Technical interview
  • Background check
  • Offer

What’s in it for you?

  • Competitive compensation with a flexible bonus scheme.
  • Hybrid work model: this position allows for a combination of in-office and remote work as needed.
  • UK, EU and USA clients.
  • Working at the crossroads of ML security, cryptographic protocol support, hardware protection, reverse-resilient mobile app development, and securing web apps for millions of users.
  • Public track record in the open-source aspect of our products.
  • Conferences, books, courses — we encourage learning and sharing with the community. Our team members share a lot in talks, workshops, and blog posts.
  • Paid vacation — 21 business days per year.
  • Paid sick leaves.

Our software is well-known amongst security-aware teams, recommended by OWASP, and popular for easily solving complicated security challenges. Apart from building “off-the-shelf” solutions, we design custom security controls for novel problems. We work in the B2B space, with customers such as power grid operators, payment processors, legal companies, and million-user customer applications. We cater to young ambitious startups and well-established enterprises, that use our software and solutions as a core part of their security arsenal.

We are a data security solutions company, providing custom bespoke solutions to innovative software development teams around the world. Our software is well-known amongst security-aware teams, recommended by OWASP, and popular for easily solving complicated security challenges. Apart from building “off-the-shelf” solutions, we design custom security controls for novel problems.

We work in the B2B space, with customers such as IIoT, AI / ML based systems, mission critical systems, robotics, navigation, power grid operators, payment processors, financial apps, legal companies, million-user customer applications. We cater to young ambitious startups and well-established enterprises, who use our software and solutions as core part of their security arsenal. Our customers are smart, but extremely demanding.

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