Junior Backend Developer - Tax Technology Consulting (based in Athens)

**Junior Backend Developer - Tax Technology Consulting** At Deloitte, **the spirit of the excellence** is part of our DNA. We strive to hire **the brightest minds from all around the globe** , allowing us to excel in both long-term strategic thinking and business improvement implementation as the undisputed global leader in professional services. Our culture is rooted in profound shared values. Our values guide us as we live our purpose to serve our clients with quality and distinction, inspire our people to work collaboratively to deliver value, actively contribute to society, and lead the profession by challenging ourselves to do what matters most. Deloitte’s values are what unite us across cultures and geographies, and ultimately help us earn the trust and respect of our people, clients, and society. We believe that our differences enable us to **#makeanimpactthatmatters.** **#ChooseDeloitteIf** * You want to work with **inspiring, ambitious, and supportive people** with diverse geographical and academic backgrounds and extensive skills; * You get excitement by accomplishing tasks in a **challenging, fast-paced** environment; * You like to **nurture people** and **share your knowledge** with others. **#YourRole** 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. **#AboutTax** Managing taxes is a critical part of an effective business strategy and our Tax Business offers clients a broad range of fully integrated tax services by using the help of modern technology. Our tax professionals help diverse clients address their tax compliance obligations, analyze the tax effect of complex business decisions, and pursue performance objectives. Our approach combines insight and innovation from multiple disciplines with business and industry knowledge to help our clients excel globally. Our committed team of tax practitioners ensures that our clients are kept abreast of the latest developments which may affect their business. At Deloitte, we believe that the most defensible tax strategies are aligned with the company’s operations and integrated with the overall business plan. We grow business value through tax and provide domestic and global tax planning to help businesses meet tax and statutory responsibilities. **Build your legacy with us. Aim higher: join Deloitte now!** Deloitte is an equal opportunity employer (EOE) and we are committed to providing a working environment that embraces and values diversity and inclusion. Knowing that people work best in different ways, we are happy to discuss alternative arrangements if the working pattern you are looking for is not specifically indicated. All applications will be considered without distinction, in accordance with our values and in line with our inclusive culture. If you have any support or access requirements, we encourage you to advise us at the time of application to assist you through the recruitment process. Please, visit our website for more information. This document has been prepared by Deloitte Business Solutions Societe Anonyme of Business Consultants, Deloitte Certified Public Accountants Societe Anonyme and Deloitte Alexander Competence Center Single Member Societe Anonyme of Business Consultants. Deloitte Business Solutions Societe Anonyme of Business Consultants, a Greek company, registered in Greece with registered number 000665201000 and its registered office at Marousi Attica, 3a Fragkokklisias \& Granikou str., 151 25, Deloitte Certified Public Accountants Societe Anonyme, a Greek company, registered in Greece with registered number 0001223601000 and its registered office at Marousi, Attica, 3a Fragkokklisias \& Granikou str., 151 25 and Deloitte Alexander Competence Center Single Member Societe Anonyme of Business Consultants, a Greek company, registered in Greece with registered number 144724504000 and its registered office at Thessaloniki, Municipality of Pylaia - Chortiatis of Thessaloniki, Vepe Technopolis Thessaloniki (5th and 3rd street), are one of the Deloitte Central Mediterranean S.r.l. (“DCM”) countries. 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