Senior Security Engineer

Redefining the wealth management industry to make it simpler, seamless, and accessible to more people.

A little bit about Flanks

Flanks is shaking up the wealth management industry by making it simpler and way more efficient for financial institutions. Our SaaS platform is designed to help banks, family offices, and wealth managers get a full picture of their clients' financial assets—all in one place.

Founded in 2019 and based in Barcelona, we've brought together a team of passionate wealth management and tech pros, all with a shared goal : to change how wealth management is done. Backed by €23 million in investment, we're growing fast, and we're not stopping anytime soon!

What we stand for :

People First – our team comes first. We want every Flanker to feel at home, engaged, and part of something bigger.

Keep Growing – as the company grows, so should you. We're all about personal and professional development here.

Think Twice, Act Once – we believe in thoughtful decisions, considering the impact on both our team and our clients before taking action.

If you're looking for a place where you can grow and make an impact at a fast‐paced, exciting fintech startup, this might just be the place for you!

About the role

We're looking for a Senior Security Engineer to join the Platform Team at Flanks and take a leading role in strengthening our security foundations.

You'll help us stay secure and resilient across all layers — from code to cloud — working closely with engineers and leadership to make security a core part of how we build.

We want someone with a hacker's mindset, strong technical skills, and a proactive attitude. Someone who doesn't just find vulnerabilities, but fixes them and improves the system for everyone.

What you'll do ️

Continuously evolve our tools, practices, and culture of security.

Lead security initiatives across our stack (apps, infrastructure, and processes).

Perform pentesting, vulnerability assessments, and incident response.

Define and implement security controls derived from business processes.

Collaborate with teams to design secure architectures and validate security requirements.

Work with auditors and clients to communicate our security posture clearly.

What we'd love to see

Deep experience in ethical hacking, pentesting, and secure software design.

Strong knowledge of Python, JavaScript, Kubernetes, and GCP.

Ability to understand code, automate security tasks, and design scalable defenses.

Hands‐on with cloud security, appsec, and infra security.

Self‐driven, curious, and collaborative — a true security builder.

Language Proficiency : Professional proficiency in both English and Spanish to collaborate effectively in our bilingual environment ️.

Bonus points

Experience with security automation or detection engineering.

Contributions to CTFs, security research, or open‐source projects.

If this sounds like you, don't worry if you don't check every single box—we'll support your growth along the way.

What we offer

A full‐time, permanent contract.

We offer what we think is fair compensation.

A cool office between Sants Estació and Plaça Espanya with stunning views of Barcelona. ️

Flexible working hours and hybrid work options.

Paid day off on your birthday.

Weekly fresh fruit, coffee, and tea on tap.

Friday happy hours after our all‐hands meetings (totally optional, of course!).

Team‐building events to bond and have fun.

Health insurance and flexible compensation with Alan.

A digital canteen, thanks to Nora Real Food, subsidised at 50%. ️

A yearly training budget to keep growing.

The hiring process

Send us your CV, cover letter, etc.

You'll have a chat with our People Operations Specialist, Nicolás Guilarte.

A meeting with our CTO, Sergi Lao.

A technical discussion meeting with some of Flanksteam members.

Any extra meetings you (or we) might need to iron out any questions.

We send you an offer!

We aim to keep things moving fast—ideally wrapping things up in one to four weeks.

If this sounds like a good fit for you, we'd love to hear from you. Don't hesitate to send us your CV and / or cover letter.

At Flanks, we believe in fostering diversity and inclusion across everything we do. We're proud to be an equal opportunity employer, and we welcome all applications regardless of race, religion, gender, age, or disability status.

Additionally, we have an Equality Plan in place to ensure fairness and inclusivity in all our policies and practices.

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