• Design, develop, and maintain the core backend architecture, ensuring it is scalable, secure, and optimized for performance. • Work closely with front-end developers, product managers, and UX/UI teams to build seamless and integrated backend solutions that align with product requirements and user needs. • Monitor and improve the backend system’s reliability, performance, and security, implementing solutions to handle high-volume requests and ensure smooth operation. • Oversee database architecture and optimize queries, ensuring data integrity and performance while managing storage and scalability challenges. • Conduct code reviews to ensure high-quality, maintainable, and well-documented code, promoting a culture of excellence in backend development. • Evaluate and integrate new technologies, frameworks, and tools to enhance the backend infrastructure and improve development efficiency.

Role Description We are seeking a Backend Developer with strong experience in Python, API development, databases, data processing, and backend architecture, based in Greece, 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 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. Qualifications - 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. Requirements - Experience with SQLAlchemy 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. Benefits - Work on advanced backend systems with real technical depth. - Opportunity to build core platform components, not just minor features. - Exposure to data processing, automation, analytics, monitoring, and secure software engineering. - A demanding but rewarding technical environment. - Space to take ownership and contribute to long-term product architecture. - Highly competitive salary reviewed upwards on a regular basis. - Working from home: Hit your goals from the comfort of your home because we value performance, not the place. - Personal and professional development, amongst industry experts and talented people. Company Description 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 This position is available only for Greek residents.

• Liderar el proyecto garantizando la estabilidad • Coordinar al equipo de dos developers junto con el scrum master • Gestión de stakeholders • Liderar y participar en el desarrollo técnico de las soluciones e implementación de las mismas • Gestionar iniciativas de migración • Realizar análisis de viabilidad técnica • Actuar como Scrum Master para el cumplimiento de las metodologías ágiles • Actualización de la documentación en ServiceNow • Gestión de incidencias • Supervisar las posibles vulnerabilidades de seguridad y creación de planes para solucionarlos • Participación en auditorías • Actuar como principal interlocutor con los proveedores internacionales

Role Description You will join our Backend team and build the core services and infrastructure that power the Xata platform. - Backend squads: Data Plane & Control Plane - Data Plane: the core runtime infrastructure that makes Postgres branches real: storage, replication/data movement, provisioning, orchestration, performance, and reliability. - Control Plane: the services and public APIs that manage and expose that infrastructure: user-facing product features, workflows/coordination, and close collaboration with Frontend. Depending on team needs and your strengths, you may work primarily in one squad. In this role, you will: - Design and build core platform capabilities for our Postgres infrastructure. - Develop backend services and APIs that power our hosted and self-hosted offerings. - Work on database branching, storage systems, replication, lifecycle management, and orchestration. - Own projects end-to-end: identify opportunities, propose solutions, implement, deploy, and operate. - Contribute to our growing portfolio of open-source projects, including pgroll, pgstream, and other components of the Xata platform. - Collaborate closely with engineers across backend, frontend, product, and platform teams. - Participate in architecture discussions and technical decision-making. - Participate in on-call rotations and help maintain a reliable platform. Qualifications - You are highly self-directed and thrive in environments with a high degree of ownership. - Significant experience building backend, infrastructure, or distributed systems software in production environments. - Strong programming skills in Go, C/C++, Java, or similar languages. - Strong understanding of distributed systems concepts (reliability, consistency, concurrency, failure modes). - Experience with cloud infrastructure and technologies such as Kubernetes and Docker. - Familiarity with PostgreSQL and database systems. - Strong written communication skills and the ability to work effectively in a remote environment. Requirements - Experience working on database technologies or PostgreSQL internals. - Experience building storage or infrastructure systems. - Experience developing with Rust. - Experience contributing to open-source projects. - Experience building developer tools or platform products. Benefits - Competitive salary and equity. - 30 vacation days (plus local public holidays). - Comprehensive health insurance coverage. - Budget for a co-working space of your choice. - Learning budget for conferences, courses, and books. - Flexibility, autonomy, and impact from day one. - Two company off-sites per year, with partners and children welcome. - Significant opportunities for growth, leadership, and career development.