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Senior Offensive Security Engineer w Warszawa, Polska - Jobeax

Senior Offensive Security Engineer w Warszawa, Polska is listed on Jobeax. Browse 110,000+ vacancies available.

Klarna, brieflyAt Klarna, we're building an everyday finance network, helping over 120 million consumers across 26 countries save time and money, and worry less about their finances. Working here means taking on problems most companies never get to solve, and being hands-on enough that the interesting part of the work lands with you, not someone else — you'll build with AI, not watch it https://jobeax.com/link/rnkDRzCxXZRG1Idr is the stretch zone. Come find out what you're capable https://jobeax.com/link/e4InXoNPlx3E9LsU the roleKlarna runs a public Bug Bounty program and works with external pentest vendors year-round, which means a constant stream of real findings — and someone has to work out which ones matter, why, and what else might be affected by the same root cause. That's this https://jobeax.com/link/kwiyzHaIipQTXHy4'll sit on the Offensive Security team, running your own penetration tests against Klarna's internal and public-facing systems while also triaging what comes in from bug hunters, pentest vendors, and the SOC. When you find something, you won't stop at the one instance — you'll dig for variants across the codebase and infrastructure, and take what you learn back to the teams that own the https://jobeax.com/link/i7FZHBsSHf8x8H9P's stack runs Java and https://jobeax.com/link/JSd7UYCSg572jJDY services on AWS in a microservice architecture, with third-party integrations added constantly — you'll need to keep pace with all of it, not just one https://jobeax.com/link/F4zp5nBN9NCw0GPd you'll doYou'll run white-box and black-box penetration tests against internal systems and public-facing https://jobeax.com/link/o6p5daBAbHuY5bFP'll manage, triage, and investigate Bug Bounty submissions and external pentest https://jobeax.com/link/sddPGxPutTCEoTUg'll perform variant analysis on issues surfaced through any channel, tracing where else the same class of bug might https://jobeax.com/link/lA0zUdUVppKjbk4q'll research and assess the security of Klarna's third-party solutions and https://jobeax.com/link/QEeeqzraHiS95A4I'll build tooling for reconnaissance, automation, and metrics https://jobeax.com/link/21aHJHf3UNnqr4ye'll guide developers, product security teams, and SOC investigations with hands-on https://jobeax.com/link/B4Af6kTArPlp3rr4'll run demos, workshops, and training that spread offensive security practices across https://jobeax.com/link/vbcnFrOlbktjN6zv'll assess the security of Klarna's tech stack and help mature the security program https://jobeax.com/link/VzjCwfJYZgaUJYB0 you areYou've spent 5+ years running penetration tests and technical security assessments against production systems, not just lab https://jobeax.com/link/hj0fhRLVXiKXhfVY can read code and find real vulnerabilities in it, particularly in Java and https://jobeax.com/link/wkLUDbrc2TsoUPdo're comfortable operating in AWS and reviewing microservice architectures for security https://jobeax.com/link/chsyk4BPtfnE5OGP write up what you find so developers can act on it — clear findings tied to concrete remediation steps, not just severity https://jobeax.com/link/NiiPRhzRafxinEpL script your own tooling in Python rather than relying only on off-the-shelf https://jobeax.com/link/V0c2R2xcMBE6V4fC push offensive security forward at Klarna on your own initiative, not just when assigned a https://jobeax.com/link/JVcMiBwHHq15iOsD points forIndustry certifications such as OSCP, OSWE, CREST, GIAC, or an AWS security https://jobeax.com/link/6hNYvrDbLqvjsAVe participation in CTFs or the broader security research https://jobeax.com/link/azXocd6ZdUxMlwaf security research you can point to — CVEs, conference talks, or published https://jobeax.com/link/KNPvjZEi7CiRdDuF you should know before applyingThis position is based in Klarna's Milan office; most teams currently meet in person 2–3 days per week, and this varies by team and can change over time.Non-obvious backgrounds are welcome. Diversity of skills, perspectives, and backgrounds is how we create, innovate, and disrupt like no https://jobeax.com/link/sSiMwgyAThuXrOzZ compensation will be based on the candidate's qualifications, skills, and https://jobeax.com/link/k5bCFYi4IMbf9jBV include a CV in English. Concrete beats comprehensive — what you built, what it did, what it https://jobeax.com/link/kS4dW4HlAmvDWgNY to learn more about Klarna and what it's like to work here? Explore our career site!

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