Software Security Backend Engineer

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe.

Join our client’s team, where you’ll play a key role in shaping a next-generation Software Security platform at one of the world’s leading global financial institutions. Your contribution will help deliver high-impact solutions in cybersecurity – open-source, cloud-native security services built in-house and running at enterprise scale.

You’ll step in as a Software Security Engineer – Backend, working closely with cross-functional agile teams in the Security space to drive technical delivery and best-in-class design and code. Your role will be central to moving away from high-cost vendor platforms toward open-source, cloud-native solutions with a high degree of automation – not just execution.

Sounds like your kind of challenge?

#LI-Hybrid – 6x/month from the office in Kraków

What you’ll be doing

Designing and implementing scalable, secure backend services using Python (Django) and Node.js (TypeScript/NestJS), with high-performance components written in Go
Architecting for Google Kubernetes Engine (GKE), optimising PostgreSQL query performance for high-concurrency workloads, and building event-driven architecture with Pub/Sub
Owning the full lifecycle of your services on GCP, ensuring they are resilient, observable, and cost-efficient
Designing and managing OAuth2/OpenID Connect flows within GCP; treating security as a feature with Zero Trust models embedded from the start
Implementing Infrastructure as Code (Terraform) and always considering automation as a default approach – reducing toil and enabling faster, more secure delivery
Mentoring team members, building engineering communities that raise the bar on quality and efficiency, and constructively challenging existing thinking to develop better paths forward
Staying ahead of industry shifts (Go, Rust, TypeScript) and guiding the engineering community on evolving trends

Note: Detailed project information will be shared during the recruitment process.

What you get in return

Flexible cooperation model – choose the form that suits you best
(B2B, employment contract, etc.)
Hybrid work setup – 6x/month from the office in Kraków
Collaborative team culture – work alongside experienced professionals eager to share knowledge
Continuous development – access to training platforms and growth opportunities
Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more
High quality equipment – laptop and essential software provided

Who we’re looking for

Deep expertise in Python (Django) and/or Node.js (TypeScript/NestJS), with a proven track record of shipping production-grade services
Hands-on experience with GCP services (Cloud Run, GKE, Filestore) and Infrastructure as Code (Terraform)
Ability to design and implement scalable, secure backend services with high-performance components in Go
Experience architecting with GKE, optimising PostgreSQL for high-concurrency, and building event-driven systems (Pub/Sub)
Knowledge of OAuth2/OpenID Connect; security-first mindset with practical experience of Zero Trust models
T-shaped engineering profile: broad full-stack understanding with deep backend expertise
Passion for automation, engineering excellence, and continuous learning; actively delivers code to production

Nice to have:

Ability to spot a problem or opportunity and independently engineer a solution end-to-end
Thinks holistically about the impact of their work beyond immediate delivery
Open-source contributions, GitHub portfolio, or technology blog
Generalist mindset – comfortable applying engineering thinking across multiple domains, not just one specialisation

Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

Software Security Backend Engineer

Kraków

B2B

1200-1450 PLN/MD netto + VAT

Apply for position

I will handle your recruitment

Anna Rodak-Bucka

SUPPORT & BENEFITS

Private healthcare

Fast access to doctors and medical tests.

Mindbox fully covers the individual package. You can extend the coverage to your partner and family on preferential terms. A wide network of medical providers and clear rules for everyday use.

Multisport

Energy that pays off.

We cover 50% of the card cost. You get access to thousands of sports facilities across Poland, plus a convenient mobile app. Additional cards for family members are available.

Training & development

Practical support for your career growth.

We co‑fund courses, certifications and conferences under a clear Training Policy. You also get access to a library of recorded webinars and trainings – available whenever you need them.

Eyewear or contact lenses co‑funding

Clear vision means comfortable work.

Up to PLN 500 every two years, with an additional PLN 300 available in justified cases. Simple reimbursement, regardless of your form of cooperation.

Group life insurance

Real protection from day one.

Option I is fully funded by Mindbox, Option II is co‑funded. You can include your partner and adult children, with coverage that also applies to treatment and hospitalisation abroad.

Ongoing support from the Talent Network Development

You’re not on your own in a project.

Regular contact, quick response and a partnership‑based approach. You focus on your work — we help take care of the rest.

Regular integration meet‑ups

Relationships that work beyond the project.

Cyclical meet‑ups for contractors in major cities across Poland. A space to talk, exchange experience and stay in real contact with the Mindbox team.

Annual company‑wide integration

One event. The whole community.

A two‑day company gathering with accommodation, transport and a full activity programme. Time to connect teams from across Poland and build shared experiences.