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We are looking for

Senior AI-Native Software Engineer (Application Security)

EuropeSoftware Engineer, Python, JavaScript, .NET
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About AltexSoft

AltexSoft is an AI-powered software engineering company. You'll join a long-running engagement with an enterprise software vendor as the security owner for one of its product lines. The products run inside customer environments with high security demands, so a vulnerability report is never only a ticket: it is a fix, a release, and often a conversation with a customer or an external researcher.

About Project

You fix vulnerabilities in real enterprise products, and you use AI to do it faster than a security team usually can. We're looking for an engineer who writes production code and thinks like an attacker, and who already works with AI agents as the default, not as an experiment.

You Have

  • 5+ years of production software engineering in at least one of Go, Python, C#, or JavaScript/TypeScript.
  • Hands-on experience finding, validating and prioritising application security vulnerabilities in code you did not write.
  • Working knowledge of OWASP Top 10, CWE, CVSS and exploitability analysis; secure design and threat modelling.
  • Debugging complex production systems, not only test environments.
  • Daily, recent use of AI coding agents (Claude Code, Cursor, Copilot agent mode or similar) in real investigation or remediation work. Can show an example.
  • Written and spoken English at a level where you can explain a vulnerability to a customer's security team.

Would be a plus

  • Experience as a Security Champion or technical security lead.
  • Hands-on work with SAST, DAST, SCA, dependency analysis or container-security tooling.
  • Coordinating pen tests or a vulnerability disclosure programme.
  • Familiarity with OWASP SAMM or a similar maturity model.
  • Internal tools or AI workflows built for a security process (triage bots, MCP servers, eval harnesses).
  • Experience with CVE lifecycle and dependency updates on mature or legacy products.

You Are Going To

  • Own security issues for a product line end to end, as its Security Champion: from the incoming report to a validated fix in a release.
  • Investigate, reproduce and prioritise vulnerabilities from customers, scanners, pen tests and independent researchers. Plan remediation by real exploitability and risk, not by score alone.
  • Find root causes in large, unfamiliar codebases and ship the fix yourself. Coordinate the work when a fix crosses components or teams.
  • Build internal tools and AI-assisted workflows for triage, remediation, testing and validation.
  • Work with architects on secure design patterns and guardrails, and coach engineering teams on secure development.
  • Support customer security reviews and coordinated vulnerability disclosure. Explain findings clearly to engineers, product managers, leaders, customers and researchers.

We offer

Cup

Work-life Balance

  • Possibility to work remotely
Health

Health Care

  • Reimbursement of medical expenses
  • Online morning exercise
book

Education

  • Compensation for trainings, seminars, conferences
  • Free access to the Pluralsight and ACloudGuru knowledge base
  • Access to the AltexSoft library with  top-notch materials
  • A mentor for a probation period
  • Engagement in our Mentorship Hub program as a mentor or a mentee to foster professional growth and development 
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Development

  • Horizontally — master new technologies at internal courses
  • Vertically — choose your own career path through Competency trees
medal

Recognition Program

  • All your activities are marked by points that can be exchanged for gifts to fit any taste.
Contact our Talent Acquisition Specialist
Bohdana Kliekbohdana.kliek@altexsoft.com

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To many people, the world is chaos. To us, it's something a few effective formulas can organize and even change.

Come along if you share our vision

  • We were founded in 2007. Employer of the Year (2014, 2017, 2019).
  • The AI Ukraine conference and the Know Your Onions meetups organizer.
  • R&D centers in Ukraine (Kharkiv, Kremenchuk, Lviv) and Georgia (Tbilisi). We employ more than 300 people.