Quanta Tech Systems

Overview
 We are hiring a senior-level Backend Developer to join the core technical team for a newly restructured security-focused application. This is a high-ownership, long-term role. The ideal candidate is experienced, fast-moving, reliable under pressure, and able to handle both architectural complexity and urgent operational needs.

Responsibilities
 • Develop and maintain backend infrastructure for a multi-layer security application
 • Build scalable and reliable APIs, integrations, and backend logic
 • Troubleshoot and resolve backend issues quickly (critical response mindset)
 • Participate in backend architecture discussions and feature planning
 • Work closely with the founder, senior consultants, and product direction
 • Optimize for performance, security, reliability, and stability
 • Produce clean, testable, well-documented code suitable for long-term scaling

Requirements
 • 5 to 10+ years backend development experience
 • Strong background in security systems, networking, or high-pressure environments
 • Ability to rapidly diagnose and fix backend production issues
 • Strong communication, discipline, and problem-solving skills
 • Proficiency with backend languages such as Node.js, Golang, or Python
 • Experience with cloud infrastructure (AWS preferred)
 • Independent, proactive, and able to handle urgent shifting priorities
 • Ukraine-based preferred (timezone alignment and strong engineering culture)

Nice to Have
 • Experience with VPN technology, encryption, authentication, or security workflows
 • Familiarity with frontend technologies for cross-functional collaboration
 • Experience working with technical advisors or senior consultants

Compensation
 • Competitive; based on seniority and long-term alignment

Quanta Tech Systems is seeking a highly skilled Brand Content Creator to develop premium, consistent content across multiple brands and executive initiatives. You will collaborate directly with leadership, including the CEO, producing high-end visual, written, and multimedia content that aligns with brand identity and quality standards.

Key Responsibilities:
• Create high-quality brand content across digital platforms
• Develop visual, written, and multimedia assets aligned with brand guidelines
• Support executive personal branding with premium content
• Build and refine brand identity assets across multiple brands
• Execute fast-turnaround content calendars and workflows
• Conduct competitive and benchmark research
• Adapt content for bilingual English/Spanish audiences
• Support brand launches and campaigns with cross-channel assets
• Maintain consistency in tone, identity, and quality standards

Qualifications:
• Proven experience as a brand content creator
• Strong portfolio of high-end visual + written content
• Professional proficiency in English & Spanish
• Strong Adobe Suite / Canva Pro skills
• Ability to work independently and execute fast
• Experience collaborating with leadership teams
• Ability to produce consistent, premium-quality content with minimal oversight

This is a full-time, in-office role located at Serrano 110, Madrid.