JOB DETAILS

Senior Fullstack Developer (B2B Contract)

CompanyOX Security
LocationWarsaw
Work ModeOn Site
PostedDecember 21, 2025
About The Company
OX Security is the creator of VibeSec, the first AI-Native vibe security platform that stops insecure AI-generated code before it ever exists. By embedding dynamic security context directly into AI coding tools, VibeSec ensures every line of code is secure from inception. Finally, security moves faster than vulnerabilities.
About the Role

We’re looking for a sharp, experienced Full Stack Engineer to join our global Developers Experience team at OX Security. This team is all about building the infrastructure and integrations that empower our product.

You’ll take part in shaping scalable, end-to-end features, from concept to production, with full ownership over architecture, design, and delivery. We value clean code, strong design thinking, and a collaborative mindset.


Responsibilities

What You’ll Be Doing

  • Build and maintain scalable systems using Node.js and React
  • Own end-to-end features — from design through implementation to production
  • Collaborate closely with product managers, customers, and R&D teams
  • Lead and participate in code reviews and architectural decisions
  • Work on high-scale, cloud-based infrastructure (AWS, MongoDB)




Requirements

What We’re Looking For

  • 5+ years of hands-on development experience
  • Strong experience with both React and Node.js (must-have)
  • Passion for building reliable and well-designed systems
  • Strong communication skills and experience working in cross-functional teams
  • Ability to work independently and lead by example




Key Skills
Node.jsReactClean CodeDesign ThinkingCollaborationCode ReviewsArchitectural DecisionsCloud-Based InfrastructureAWSMongoDB
Categories
TechnologySoftware
Job Information
📋Core Responsibilities
The Senior Fullstack Developer will build and maintain scalable systems using Node.js and React, owning end-to-end features from design through implementation to production. They will collaborate closely with product managers, customers, and R&D teams while leading code reviews and architectural decisions.
📋Job Type
full time
📊Experience Level
5-10
💼Company Size
185
📊Visa Sponsorship
No
💼Language
English
🏢Working Hours
40 hours
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