Senior Backend Developer

Location: Athens, Greece (preferred)
Work Model: Remote first (6-week probation), then onsite in Athens
Start Date: Immediate
Department: Engineering
Reports to: Lead Developer & CTO

About GTSS

GTSS builds SaaS and digital platforms for the creator economy, including a marketing CRM used by global creators and agencies. With 7 products in our pipeline, were scaling engineering operations and building product-dedicated teams.
Our culture is grounded in first-principles thinking, shipping fast, and iterating continuously.

Role Overview

Were seeking a Senior Backend Developer to architect, scale, and optimize the backend infrastructure powering actual projects and future GTSS applications.
This is a high-impact role for someone who owns API performance, database reliability, and microservice architecture.

Key Responsibilities

• Build and maintain Node.js/Express APIs for high-traffic production systems.

• Architect scalable backend services and microservices.

• Optimize and maintain PostgreSQL databases.

• Ensure API reliability, security, and performance.

• Collaborate with Product and Frontend teams to deliver end-to-end features.

• Own CI/CD processes and infrastructure best practices.

Required Skills

• Node.js

• Express

• PostgreSQL

• TypeScript

• API architecture & documentation

• Git workflows

• CI/CD pipelines

Preferred Skills (Nice to Have)

• Docker

• AWS or DigitalOcean deployment

• Microservices architecture

• Social media APIs

• Real-time data processing

What Were Looking For

• 510 years of backend engineering experience.

• Bachelor's in Computer Science or equivalent advanced experience.

• Strong ownership mindset; thrives in high-velocity delivery.

• Based in Greece (Athens preferred) or able to work remote onsite after probation.

Why Join GTSS

• Lead backend initiatives across multiple SaaS products.

• Build infrastructure from first principles in a scaling startup.

• Direct access to leadership and decision-making.

• Immediate impact on live users and customer operations.

Apply now and lead the backend architecture powering the creator economys next generation of tools.