Backend Developer

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. Responsibilities Design, develop, and maintain backend services using PythonBuild clean, stable, and well-documented REST APIsDevelop data ingestion, normalization, enrichment, and processing workflowsWork with structured and unstructured technical datasets from internal and external sourcesDesign and maintain database schemas, indexes, queries, and backend data modelsImplement background workers, scheduled tasks, automation pipelines, and long-running processing jobsWork with PostgreSQL, Redis, object storage, and other backend infrastructure componentsImplement authentication, authorization, API access controls, rate limiting, and audit-friendly backend logicBuild backend support for analytics, reporting, monitoring, workflow automation, and user-facing platform featuresCollaborate closely with frontend developers to define API contracts and deliver reliable data to the user interfaceImprove backend performance, error handling, logging, and observabilityParticipate in code reviews, testing, debugging, deployment preparation, and technical documentationHandle proprietary technical information with discretion and professional confidentiality Required Technical Skills Strong experience with PythonExperience with Flask, FastAPI, or DjangoGood understanding of REST API designExperience with PostgreSQLStrong SQL skills and understanding of database designExperience with Docker and Linux environmentsExperience with Git and collaborative development workflowsUnderstanding of authentication, JWT, RBAC, and API security principlesExperience with background jobs, workers, queues, schedulers, Redis, Celery, or similar technologiesAbility to write clean, modular, testable, and maintainable backend codeStrong debugging skills in development and production-like environmentsAbility to understand complex business logic and translate it into reliable backend services Nice to Have Experience with SQLAlchemy or similar ORM frameworksExperience with large-scale data processing, parsing, enrichment, or data quality workflowsExperience with asynchronous processing and event-driven backend designExperience with search, indexing, graph, or analytics-oriented databasesExperience with cloud services, containerized deployments, and CI/CD pipelinesExperience with monitoring, logging, metrics, and observability toolsExperience building backend systems for enterprise platforms, technical analytics, monitoring, compliance, intelligence, or operational decision-support productsExperience with secure coding and secure-by-design backend architectureFamiliarity with AI-assisted processing or LLM integrations is a plus Technology Stack Python, Flask/FastAPI, PostgreSQL, SQLAlchemy, Redis, Celery, Docker, Linux, Git, REST APIs, JWT, RBAC, background workers, schedulers, external API integrations. Ideal Candidate Profile 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 production-quality engineering. This role is suitable for someone who can build the core engine of a serious software product and take ownership of backend components from design to implementation. Confidentiality Note The selected candidate will work on proprietary backend systems and sensitive product logic. Detailed product information, data flows, and internal architecture will be shared only with shortlisted candidates and, where appropriate, under confidentiality terms. Benefits Work on advanced backend systems with real technical depthOpportunity to build core platform components, not just minor featuresExposure to data processing, automation, analytics, monitoring, and secure software engineeringA demanding but rewarding technical environmentSpace to take ownership and contribute to long-term product architectureHighly competitive salary reviewed upwards on a regular basisWorking from home: Hit your goals from the comfort of your home because we value performance, not the placePersonal and professional development, amongst industry experts and talented people At AI2CYBER, we are a cybersecurity firm dedicated to providing cutting-edge solutions to protect businesses and individuals from evolving cyber threats. Our mission is to empower organisations to navigate the complex cybersecurity landscape with confidence. We believe that by combining robust security solutions, continuous improvement, and a proactive mindset, we can help our clients stay one step ahead of cyber attackers. We are committed to building a safer digital world and are passionate about making a positive impact in the industry. This is a full-time position with competitive salary and benefits. If you have a passion for backend development and are looking for an exciting opportunity to work with cutting-edge technology, we would love to hear from you! Note: All applications will be treated with strict confidentiality. To apply, please send us your CV at careers@ai2cyber.com Requirements This position in available only for Greek residents.