Middle / Senior Full-Stack (Kotlin + React) Engineer

About the Company

Established in 2004, ALLSTARSIT was founded with a clear vision: to enhance the landscape of global IT employment by bridging the gap between companies and skilled professionals. The core belief was that assembling a team shouldn’t be hindered by geographical constraints. Fast forward to the present day, ALLSTARSIT stands as an international outstaffing service provider committed to change the way businesses recruit, compensate, and oversee top talent worldwide.

With operational hubs scattered across Europe, Asia, and LATAM, and its headquarters situated in San Francisco, US, the company boasts a workforce of over 1,000 adept professionals. Spanning across more than 20 countries, ALLSTARSIT offers a diverse range of skilled employees across various verticals, including AI, cybersecurity, healthcare, fintech, telecom, media, and so on.

About the Project

This product builds a continuous security validation platform that simulates real-world cyber attacks against enterprise systems.

Instead of relying on static checks or occasional penetration testing, the platform automatically generates and runs attack scenarios based on evolving threat patterns, allowing teams to see how their infrastructure, tools, and processes actually behave under pressure.

It’s closer to “automated offensive security at scale” than traditional cybersecurity tools through testing not just systems, but also human response and operational readiness.

Considered locations: Ukraine, Bulgaria, Georgia, Kazakhstan.

Potential working week: Sun-Thu (negotiable for Mon-Fri), standard working hours.

Required skills:

• 3+ for the Middle level / 5+ for the Senior level years of commercial experience in full-stack development
• Strong Back-End expertise in Kotlin
• Solid Front-End experience with React.js
• Experience building distributed or high-load systems
• Ability to work with complex workflows and non-trivial system logic
• Bonus: exposure to cybersecurity, DevOps, or infrastructure-heavy environments

What makes this interesting

• You build systems that actively break things on purpose (in a controlled way)
• Real-world impact: your features directly influence how companies prevent breaches
• Small team → high ownership, no layers of “approval theater”
• Product complexity comes from behavior simulation, not CRUD forms

Scope of work:

• Design and build end-to-end features across Back-End (Kotlin) and Front-End (React.js)
• Develop systems that generate, orchestrate, and execute complex attack scenarios
• Work on automation pipelines simulating real attacker behavior and flows
• Build scalable services handling distributed execution and large data streams
• Collaborate closely with security researchers and product to translate threats into product features
• Own features from idea to production