Senior Offensive Security Engineer

Our client: Klarna

Location: Warsaw (hybrid work: 2-3 days a week from office)

Rate: 170 - 195 PLN per hour

Cooperation model: B2B or Employment Contract

Start date: ASAP

Recruitment process: 1 timed Abstract and Logical Reasoning Test (up to 15 minutes); Capture the Flag challenge, 1 short interview (up to 30 minutes)

Do you want to play a key role in revolutionizing the future of finance? Join Klarna - a global leader in deferred payments, with over 85 million active users and 2.5 million transactions processed daily! As a pioneer in modern payment solutions, Klarna is developing innovative methods that streamline the shopping experience, enhance transaction security, and expand the availability of purchasing options. 

We're seeking individuals eager to achieve remarkable results and share their bold vision to redefine the future of payments and fintech. Send us your CV - we can’t wait to meet you!

Your role is:

-> Conduct both white-box and black-box penetration tests on internal and public-facing applications and assets;

-> Manage, triage, and investigate Bug Bounty submissions and external penetration testing findings;

-> Perform variant analysis on vulnerabilities identified through different channels;

-> Perform in-depth security analyses of third-party solutions;

-> Develop tools to improve reconnaissance, automation, and metrics collection;

-> Provide expert guidance to developers, product security teams, and the SOC to ensure effective issue remediation;

-> Share knowledge by delivering demos, workshops, and training sessions on offensive security practices;

-> Identify and address security issues in code, with a strong focus on Java and Node.js environments.

Your skills and experiences:

-> At least 7 years of experience on a similar role;

-> Work proficiently within cloud environments like AWS, leveraging modern microservices design principles;

-> Demonstrate strong scripting skills and contribute to larger Python projects;

-> Possess industry-recognized certifications (e.g., OSCP, OSWE, CREST, GIAC);

-> Strong educational background in Computer Science, Information Technology, or a related field;

-> Language proficiency: Advanced English (minimum B2 level).

Nice to have:

+ Actively participate in Capture The Flag (CTF) competitions and contribute to the cybersecurity community.

Our client offers:

+ Great opportunity for personal development in a stable and friendly large multinational company;

+ Start-up mentality, small agile teams;

+ Global Reach: Impact millions with seamless shopping and payments;

+ Career growth and additional education.

If interested, please apply safely through this portal (application rules are in accordance with GDPR). Employment agency Nr 17138.