Backend Developer

at AI2

CYBER

We are seeking a highly motivated Backend Developer
based in Greece, with strong experience in
Python
, API development, databases, data processing, and backend architecture, to join our engineering team.
The role focuses on building reliable backend services, scalable APIs, data ingestion mechanisms, processing workflows, automation features, and core platform logic for advanced enterprise software products.

You will work on systems that handle complex technical data, integrate with multiple sources, support operational workflows, and require strong attention to reliability, security, maintainability, and performance.

• Design, develop, and maintain backend services using Python.
• Build clean, stable, and well-documented REST APIs.
• Develop data ingestion, normalization, enrichment, and processing workflows.
• Work with structured and unstructured technical datasets from internal and external sources.
• Design and maintain database schemas, indexes, queries, and backend data models.
• Implement background workers, scheduled tasks, automation pipelines, and long-running processing jobs.
• Work with PostgreSQL, Redis, object storage, and other backend infrastructure components.
• Implement authentication, authorization, API access controls, rate limiting, and audit-friendly backend logic.
• Build backend support for analytics, reporting, monitoring, workflow automation, and user-facing platform features.
• Collaborate closely with frontend developers to define API contracts and deliver reliable data to the user interface.
• Improve backend performance, error handling, logging, and observability.
• Participate in code reviews, testing, debugging, deployment preparation, and technical documentation.
• Handle proprietary technical information with discretion and professional confidentiality.

• 5+ years of backend development experience.
• Strong experience with
  Python
  .
• Experience with
  Flask
  ,
  FastAPI
  , or
  Django
  .
• Good understanding of REST API design.
• Experience with
  PostgreSQL
  .
• Strong SQL skills and understanding of database design.
• Experience with Docker and Linux environments.
• Experience with Git and collaborative development workflows.
• Understanding of authentication, JWT, RBAC, and API security principles.
• Experience with background jobs, workers, queues, schedulers, Redis, Celery, or similar technologies.
• Ability to write clean, modular, testable, and maintainable backend code.
• Strong debugging skills in development and production-like environments.
• Ability to understand complex business logic and translate it into reliable backend services.

• Experience with SQL Alchemy or similar ORM frameworks.
• Experience with large-scale data processing, parsing, enrichment, or data quality workflows.
• Experience with asynchronous processing and event-driven backend design.
• Experience with search, indexing, graph, or analytics-oriented databases.
• Experience with cloud services, containerized deployments, and CI/CD pipelines.
• Experience with monitoring, logging, metrics, and observability tools.
• Experience building backend systems for enterprise platforms, technical analytics, monitoring, compliance, intelligence, or operational decision-support products.
• Experience with secure coding and secure-by-design backend architecture.
• Familiarity with AI-assisted processing or LLM integrations is a plus.

Python, Flask/FastAPI, PostgreSQL, SQL Alchemy, Redis, Celery, Docker, Linux, Git, REST APIs, JWT, RBAC, background workers, schedulers, external API integrations.

The ideal candidate is not just someone who writes endpoints. We are looking for a backend developer who understands data flows, system reliability, security requirements, performance constraints, and…