Information Security Engineer (AppSec)

Revolut; Polska; On-site; PLN 180,000 - 240,000; Full time

Job summary

Revolut is seeking an experienced Application Security Engineer to join our Technology team. You will design, test, and protect our software, working across mobile, web, and API platforms to safeguard millions of users worldwide.

Join a fast-paced, security‑minded culture where you’ll influence secure architecture, run threat modeling, and lead vulnerability detection and response efforts while collaborating closely with Engineering, Product, and DevOps teams.

Qualifications

• > 3+ years in application security, pentesting, or related security engineering role
• > Understanding of web, mobile, API vulnerabilities and remediation approaches
• > Experience in code/design reviews and threat modelling for modern architectures
• > Familiarity with DevSecOps and CI/CD tooling
• > Knowledge of authentication, authorization, session management, and cryptography best practices
• > Proficiency with security tools for dynamic and static analysis
• > Basic cloud security concepts with GCP or AWS
• > Strong communication and collaboration with engineering teams
• > Proactive, independent, and team-focused mindset

Responsibilities

• Perform security assessments on product designs, apps, and APIs
• Lead penetration testing across applications, infrastructure, and APIs
• Manage and evolve bug bounty program and coordinate with researchers
• Influence cloud security posture with DevOps on GCP/AWS
• Embed security into SDLC with guidance on secure architecture
• Develop and enforce internal AppSec standards aligned with OWASP/NIST
• Research emerging threats and evaluate new security tools
• Contribute to security training and mentoring of juniors

Skills

Application security

Penetration testing

Threat modelling

DevSecOps

Cloud security

Burp Suite

CI/CD security

OWASP Top 10

Communication

Tools

Burp Suite

MobSF

Frida

Custom scripts

Job description

About Revolut

People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products — including spending, saving, investing, exchanging, travelling, and more — help our 80+ million customers get more from their money every day.

About Revolut

People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products — including spending, saving, investing, exchanging, travelling, and more — help our 80+ million customers get more from their money every day.

As we continue our lightning-fast growth, 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work™. So far, we have 13,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution.

About The Role

Our Technology team builds the systems and experiences that keep Revolut moving. From the infrastructure behind our innovative app to the features used by millions of people around the world, they bring sharp thinking, speed, and a focus on meaningful impact to everything they do.

We’re looking for an Application Security Engineer to keep our software safe from threats and vulnerabilities. You'll be designing and building apps with security in mind while testing, monitoring, and protecting our systems along the way.

Up to shape what's next in finance? Let's get in touch.

What You'll Be Doing

• Performing security assessments on product designs, mobile apps (iOS/Android), web applications, and APIs
• Participating in Red Team missions and threat-led testing scenarios to simulate real-world attacker behaviours and validate detection and response capabilities
• Leading and conducting penetration testing across applications, infrastructure, and APIs, using a mix of manual techniques and automated tools
• Managing and evolving our private bug bounty programme, validating submissions, collaborating with researchers, and ensuring timely resolution of valid findings
• Contributing to and influencing cloud security posture, identifying misconfigurations and working with DevOps to implement best practices across GCP and AWS
• Partnering closely with engineering teams to embed security into the software development lifecycle, offering guidance on secure architecture and threat modelling
• Developing and enforcing internal AppSec standards, policies, and practices aligned with OWASP, NIST, and industry benchmarks
• Continuously researching and evaluating emerging threats, tools, and technologies to stay ahead of the evolving threat landscape
• Contributing to internal security training sessions, knowledge sharing, and mentoring of junior team members

What You'll Need

• 3+ years of hands‑on experience in application security, penetration testing, or a related security engineering role
• A solid understanding of common web, mobile, and API vulnerabilities (e.g., OWASP Top 10, CWE) and practical approaches to identify and remediate them
• Experience conducting code reviews, design reviews, and threat modelling for modern application architectures
• Familiarity with DevSecOps practices and integrating security tooling into CI/CD pipelines
• Working knowledge of authentication, authorisation, session management, and cryptographic best practices
• Proficiency with security tools, such as Burp Suite, MobSF, Frida, or custom scripts, for dynamic and static analysis
• A basic understanding of cloud security principles and experience working with GCP or AWS environments
• Great communication skills with the ability to collaborate effectively with Engineering, Product, and DevOps teams
• A proactive mindset with a passion for solving complex problems and driving secure engineering practices
• The ability to work independently while also being a trusted team player in a fast‑paced environment

Nice to have

• Experience participating in Red Team exercises, managing bug bounty programmes, or contributing to open-source security tools or research

Building a global financial super app isn’t enough. Our Revoluters are a priority, and that’s why in 2021 we launched our inaugural D&I Framework, designed to help us thrive and grow everyday. We’re not just doing this because it’s the right thing to do. We’re doing it because we know that seeking out diverse talent and creating an inclusive workplace is the way to create exceptional, innovative products and services for our customers. That’s why we encourage applications from people with diverse backgrounds and experiences to join this multicultural, hard‑working team.