Senior Fullstack Engineer

DOTSOFT is one of the most innovative and pioneering ICT companies in Greece, with long experience and expertise in developing integrated information systems and managing complex projects. With modern infrastructure, well-trained employees, investments in cutting-edge technologies and strategic partnerships with leading companies, it provides a wide range of high-quality products and services that add value to its clients.

Senior Full Stack Engineer (Python stack)

You'll lead the design and delivery of distributed applications powering international and EU-funded projects — owning systems from architecture to UX.

What you'll do

• Architect microservices: define bounded contexts, sync (REST/gRPC) and async communication, API gateway patterns, service mesh, and clear data ownership per service.
• Build backend services in Python with FastAPI or Django REST Framework — production-grade async APIs with Pydantic models, OpenAPI/Swagger contracts, versioning, and contract testing.
• Design data layers: PostgreSQL with SQLAlchemy 2.0 (async) and Alembic migrations, MongoDB via Motor/Beanie, Redis for caching and queues, and vector stores (pgvector, Qdrant, Weaviate, Pinecone). Own indexing, partitioning, and event-driven consistency patterns using transactional messaging.
• Ship AI features: integrate LLMs (Anthropic, OpenAI, vLLM, Ollama), build RAG pipelines with LangChain/LlamaIndex or custom orchestration, write preprocessing/embedding scripts. Manage prompts and operationalize inference with batching, streaming, caching, and cost monitoring.
• Collaborate with frontend & design: define API contracts via auto-generated OpenAPI schemas, generate typed clients for the frontend, and contribute to UI work when needed.
• Own DevOps & reliability: CI/CD (GitHub Actions), Docker, Kubernetes, plus observability with OpenTelemetry, Prometheus/Grafana, and Sentry.
• Work cross-functionally with design, marketing, research, and EU consortium partners — translating research prototypes into production-grade services.
• Stay current with emerging tooling (AI agents, MCP, edge inference, async Python ecosystem, PEP-driven language evolution) and evaluate it pragmatically.

• BS/MS in Computer Science, Engineering, or equivalent proven background;
• MSc in an ICT-related domain is a plus.
• 5+ years of professional software engineering experience.
• Strong Python skills with hands-on experience in web frameworks (FastAPI, Django, Flask) and async patterns.
• Solid JavaScript/TypeScript skills and experience with modern frameworks (React, Node.js, or Angular).
• Proficient with RESTful API design and implementation, including OpenAPI/Swagger contracts.
• Comfortable with HTML5, CSS3, and modern styling approaches; able to translate designs into clean, responsive UI.
• Hands-on experience with relational databases (PostgreSQL, MySQL) — schema design, indexing, and query optimization.
• Proficient with Git, code review workflows, and Agile delivery (Scrum/Kanban).
• Strong communication, teamwork, and organizational skills; able to work effectively across disciplines and with external partners.
• Bonus: experience with API testing and documentation tools (Postman, Swagger), and exposure to the AI application lifecycle (prompt engineering, evaluation, deployment, monitoring).

Benefits

• Competitive salary package

• Continuous training and development

• Modern working environment. 

All applications will be treated as confidential. All incoming CVs are evaluated and those candidates who meet the requirements of the position are contacted. By sending your CV, you consent to the processing of your personal data, in the context of the GDPR and Law 4624/2019.