Software Security Backend Engineer @ Mindbox Sp. z o.o.

Mindbox Sp. z o.o.; Kraków; Hybrid; PLN 250,000 - 350,000; Full time

Benefits offered by this job

Flexible cooperation model

Hybrid work setup

Collaborative team culture

Continuous development access

Comprehensive benefits

Job summary

Mindbox is seeking a Software Security Engineer – Backend to join a project shaping a next-generation cybersecurity platform for a leading financial institution. You’ll collaborate with cross-functional agile teams to deliver secure, cloud-native backend services with Python/Django, Node.js, and Go, prioritizing automation and open-source technologies.

The role emphasizes design for high availability, cost efficiency, and strong security controls within GCP, including Terraform-based IaC and

Qualifications

• Proven production-grade backend services using Python, Django, Node.js, and Go.
• Experience with GCP services (Cloud Run, GKE) and IaC (Terraform).
• Strong PostgreSQL optimization for high-concurrency workloads.
• Event-driven architectures with Pub/Sub.
• Security-first mindset with OAuth2/OpenID Connect and Zero Trust focus.

Responsibilities

• Design and implement scalable backend services with Python/Django, Node.js, and Go components.
• Architect for GKE, optimize PostgreSQL for high concurrency, and build Pub/Sub based event systems.
• Own full lifecycle of services on GCP, ensuring resilience, observability, and cost efficiency.
• Implement OAuth2/OpenID Connect flows and embed Zero Trust security by default.
• Apply Terraform IaC and promote automation to reduce toil and speed delivery.

Skills

Python

Django

Node.js

Go

PostgreSQL

GKE

Pub/Sub

OAuth2/OpenID Connect

Education

Bachelor's degree in Computer Science

Tools

Terraform

Google Kubernetes Engine (GKE)

Cloud Run

Kubernetes

Job description

• 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.

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?

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

Responsibilities

[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]

Requirements

Python, Django, Node.js, TypeScript, Nest.js, GCP, Cloud, Infrastructure as Code, Go, PostgreSQL, PUB, GitHub