Yalantis is a software engineering and IT consulting company in the outsourcing market. Our team has more than 500 specialists and continues to grow. Join and cooperate with us in Dnipro, Kyiv, Larnaca (Cyprus), Warsaw (Poland) and remotely from any city of Ukraine.
7 листопада 2025

Senior Penetration Tester (freelance) (вакансія неактивна)

Київ, Дніпро, Варшава (Польща), віддалено

We are looking for an experienced Penetration Tester to strengthen our offensive security capability. The ideal candidate is a hands-on professional with deep technical skills and recognized industry certifications. You will lead security assessments, drive testing methodology, and contribute to the continuous improvement of our penetration testing practice.

Key Responsibilities

  • Plan, scope, and execute penetration tests for web and mobile applications, APIs, cloud environments, and internal/external networks.
  • Identify vulnerabilities, exploit them where appropriate, and develop clear remediation guidance.
  • Prepare high-quality deliverables: executive summaries, technical reports, evidence, and retest validation.
  • Develop and maintain testing methodology, internal tooling, scripts, and exploit PoCs.
  • Communicate results effectively to both technical and non-technical stakeholders.
  • Support knowledge sharing and mentor junior security engineers.

Required Qualifications

  • 3+ years of hands-on penetration testing experience.
  • Software-focused offensive security experience: ability to understand application architectures, programming frameworks, and CI/CD pipelines and assess their security.
  • At least one advanced offensive security certification, such as OSEP, OSWE, OSCE/OSEE, GXPN, GREM, or CREST CCT. Alternatively: a combination of 3+ mid-level certifications such as OSCP, eWPTXv2, eCPTX, GPEN, CRT.
  • Strong expertise in web application security (OWASP Top 10, business logic attacks, complex exploitation).
  • Applied experience in mobile application security testing (Android/iOS).
  • Cloud security assessment experience (IAM hardening, misconfiguration analysis, serverless/container review).
  • Practical knowledge of network penetration testing techniques and common infrastructure weaknesses.
  • Strong scripting/coding capabilities (Python, Bash, JS, or similar).
  • Proficiency with common offensive security tools and frameworks.
  • Professional English writing skills (B2+) — ability to deliver clear and structured reports.

Please note that feedback on the results of the CV review will be provided only in the event of a decision to consider your candidacy further.
Otherwise, your data will be retained in the company’s CV database, and we will gladly contact you if a suitable vacancy becomes available. The consideration period is 7 working days.

Before sending us your CV, you may read our Privacy Notice.