Software Security Backend Engineer (Node)

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

Join our client’s team as a Software Security Engineer Backend - Node!

Are you a passionate backend engineer who thrives on delivering secure, cloud-native solutions? We are looking for an experienced Software Security Engineer – Backend to design, build, and scale security-driven services in a dynamic environment based on open-source and cloud-native technologies.

Sounds like your kind of challenge?

#LI- Hybrid – 6 days a month from the office in Kraków

What you'll be doing

Design and implement scalable and secure backend services using Python (Django), Node.js (TypeScript/NestJS), and high-performance components in Go.
Architect and optimize solutions for Google Kubernetes Engine (GKE) and GCP services such as Cloud Run and Filestore.
Ensure systems are resilient, observable, and cost-efficient, owning the full lifecycle of services on GCP.
Implement OAuth2/OpenID Connect flows, apply zero trust security principles, and treat security as a core feature.
Optimize PostgreSQL queries for high-concurrency environments and design event-driven architectures using Pub/Sub.
Actively contribute to code reviews and maintain technical standards across the team.
Mentor engineers, foster collaboration, and evangelize DevSecOps best practices.
Promote automation from the start, reducing toil and streamlining delivery processes.
Stay aligned with evolving trends in cloud, security, and open-source technologies.

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 – 6 days a 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

Proven expertise in:
- Python and Node.js, with production experience in building and deploying backend services.
- Google Cloud Platform (Cloud Run, GKE, Filestore) and Infrastructure as Code (Terraform).
Strong experience designing secure architectures, implementing zero trust models, and handling compliance for security-critical systems.
Familiarity with Go for performance-sensitive components.
T-shaped profile: deep backend expertise with understanding of the overall stack.
Experience in building event-driven systems and microservices in large-scale environments.

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.

Ready to take the next step?

Submit your application! We look forward to reviewing your profile 😊

Know someone who might be a great fit?
Feel free to share this opportunity using the referral link: Mindbox Referrals System