Senior Application 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); 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:

-> To conduct threat modeling and architecture/design reviews for secure applications and services;

-> To make architectural decisions to enhance security in collaboration with engineering teams;

-> To develop and improve security tooling, automation, and processes;

-> To perform code reviews and penetration testing on Klarna services;

-> To participate in and contribute to the internal engineering security community.

 

Your skills and experiences:

-> 6+ years of experience in web/mobile app security, network security, OS internals, applied cryptography, or cloud computing. Expertise in at least one area is expected;

-> Ability to pragmatically solve security issues for maximum effectiveness;

-> Experience in writing and reviewing code in at least one language: JavaScript (NodeJS), Python, Go, Erlang, Java, or Scala;

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

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

 

Nice to have:

Experience in penetration testing, code/design review, threat modeling, or security tooling development;

+ Participation in BugBounty programs and Capture the Flag (CTF) competitions.

 

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.

ID: 818 Published on: 26/02/2025
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