Senior Software Security Engineer – Cloud Native Backend

ITDS; Kraków; Hybrid; PLN 260,000 - 360,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

ITDS in Kraków is seeking a Senior Software Security Engineer – Cloud Native Backend to shape secure, scalable backend services. You will work with Python, Node.js, and Go in a hybrid, cloud-first environment, implementing OAuth2/OpenID Connect flows on GCP and building resilient, cost-efficient systems.

The role emphasizes security by design, performance tuning of PostgreSQL, Kubernetes/GKE, Terraform, and collaboration across teams.

Qualifications

• 5+ years of backend development experience with Python, Node.js or Go.
• Fluent English and EU work eligibility.
• Experience with GCP services and IaC (Terraform).

Responsibilities

• Develop and maintain backend services using Python, Node.js, and Go.
• Lead OAuth2/OpenID Connect implementations in Google Cloud Platform.
• Architect for GKE and optimize PostgreSQL for high concurrency.
• Translate business requirements into robust technical solutions.
• Contribute to open-source projects and share knowledge.

Skills

Python

Node.js

Go

Tools

Google Cloud Platform

Terraform

PostgreSQL

OAuth2/OpenID Connect

Kubernetes

Job description

Unleash innovation — build the future of secure, scalable cloud-native solutions!

Krakow-based opportunity with hybrid work model.

As a Senior Software Security Engineer – Cloud Native Backend, you will be working for our client, a leader in advancing software security through innovative, open-source, cloud-based platforms. You will play a pivotal role in driving engineering excellence across agile teams, shaping scalable, resilient solutions that set industry standards and transform business operations.

Your main responsibilities:

• Develop and maintain high-performance backend services using Python (Django), Node.js (Typescript/NestJS), and Go, ensuring they are secure, resilient, and cost-efficient.
• Lead the design and implementation of OAuth2/OpenID Connect flows within Google Cloud Platform, optimizing security and user experience.
• Architect for Google Kubernetes Engine (GKE), managing containerized applications and optimizing PostgreSQL query performance for high concurrency.
• Translate complex business requirements into robust technical solutions, fostering automation and continuous improvement.
• Contribute to open-source projects, share knowledge through blogs or Github, and advocate best practices within engineering communities.
• Collaborate across teams to maintain technical standards, improve delivery quality, and uphold industry shifts such as Go-Lang, Rust, and Typescript.
• Mentor team members, promote a security-first mindset, and ensure the entire lifecycle of services is reliable and cost-effective.

You're ideal for this role if you have:

• 5+ years of experience in backend development with Python, Node.js, or Go, with a strong track record of delivering production-grade services.
• Hands-on experience with GCP services (Cloud Run, GKE, Filestore) and Infrastructure as Code (Terraform).
• Expertise in architecting secure, scalable backend solutions with a focus on Zero Trust models and security as a core feature.
• Ability to design high-performance components and optimize database queries for high concurrency.
• Knowledge of IT development methodology, architecture design, and engineering standards.

It is a strong plus if you have:

• Contributions to open source or personal projects demonstrating technical mastery and innovation.
• Experience in holistic problem-solving and impact-driven engineering.

Language required for the role:

• English – Fluent command required.

Eligibility to work in Europe:

• Only candidates with an existing legal right to work in the European Union will be considered for this role.