junior backend developer @ thessaloniki | tax technology consulting

As an Analyst in our Tax Technology Consulting team, you will serve as a Backend Developer for our AI platform used across professional services.

The backend is built on Python with multiple modules, services, and a comprehensive middleware stack. It features multi-tenant architecture with role-based and attribute-based access control, real-time streaming, and integrations with NoSQL, relational, and in-memory databases as well as cloud services.

You will contribute to the API layer, business logic, data layer, and integration points — developing production-grade backend engineering skills in a multi-tenant environment serving users across multiple countries.

This is a growth-oriented role for someone early in their backend career who wants to build real-world, high-quality production systems

#KeyResponsibilities

• Contribute to the backend codebase — API routes, services, data access layer, and business logic

• Write and maintain API endpoints following established patterns and standards

• Work with the data layer across MongoDB, PostgreSQL, and Redis

• Assist with authentication and authorization flows — Azure AD integration and role-based access control

• Contribute to real-time communication features — SSE streaming and WebSocket notifications

• Build supporting components for data pipelines, scheduled jobs, and workflow orchestration

• Write comprehensive unit and integration tests

• Participate in code reviews — both reviewing and receiving feedback

• Document APIs, service interactions, and data models

• Collaborate with the AI and frontend teams on integration points

#RequiredSkills

To qualify for the role, you must have:

• Bachelor’s degree in Computer Science, Software Engineering, or a related field

• 0–2 years of professional backend engineering experience (internships and academic projects count)

• Solid Python proficiency — comfortable with object-oriented and functional patterns

• Familiarity with web frameworks — FastAPI, Django, Flask, or equivalent

• Basic understanding of databases — at least one of MongoDB, PostgreSQL, or similar

• Understanding of REST API concepts — HTTP methods, status codes, request/response patterns

• Familiarity with async programming concepts in Python

• Basic understanding of version control with Git

• Eagerness to learn and grow in a fast-paced production environment

• Excellent written and verbal communication skills in English

#PreferredSkills

• Experience with FastAPI and async Python (asyncio)

• Familiarity with MongoDB aggregation pipelines or PostgreSQL query optimization

• Experience with Redis — caching, pub/sub, or distributed locking

• Understanding of authentication patterns (OAuth2, JWT)

• Familiarity with Docker and containerized development environments

• Experience with automated testing in Python (pytest)

• Knowledge of WebSocket or Server-Sent Events (SSE)

• Familiarity with Azure cloud services

• Personal projects demonstrating backend engineering skills

• Experience with CI/CD pipelines

#WhatWeOffer

At Deloitte, we know that great people make a great organization. We value our people and offer employees a broad range of benefits.

🏠Modern hybrid workplace, characterized by flexibility and Smart Working

⚖Empowered well-being: We provide multiple program offerings to support your well-being needs (flexible working arrangements, extra days of leave, parental allowances)

🌍Engagement within international large-scale teams and projects, with opportunities to travel for training or client purposes.

📚Constant opportunities for learning with unlimited access to internal and external learning platforms and sponsored certificates aligned with business needs and technology trends.

🚀Challenging and innovating environment where personal development and growth are encouraged, always with transparency and trust.

? Diverse culture and active communities that enable you to bring yourself to work.

🎉 Team Building and Corporate Social Responsibility Activities.

🏃 A buddy to support you with your onboarding.

🌴Extra days of annual leave.

⚕Private medical health insurance plan.

💳 Ticket restaurant card.

? Exclusive Discounts to several retail providers, restaurants and others.

📱 Mobile phone.

🍏 Fresh fruits and unlimited coffee everyday at our offices.