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.

Software Security Backend Engineer (Node)

Kraków

B2B

1200-1500 PLN/MD netto + VAT

Apply for position

I will handle your recruitment

Jolanta Gmurczyk

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.