Full-Stack Software Developer (AI Integration & Prompt Engineering)

What Impact will you make?

Full-Stack Software Developer (AI Integration & Prompt Engineering) @ Deloitte Competence Center

Are you looking for an opportunityin Deloitte that offers you a hybrid working model?

Are you ready to work on international projects for industry-leading clientsaround the world and elevate your tech consulting careerto an international level?

If so, check below for more info about this career opportunity!

You bring passion, we bring opportunities!

#YourOpportunity

Deloitte is a worldwide leader in Professional Services with a presence in more than 150 countries and territories. Since 2018, Deloitte has been operating its Competence Center in Thessaloniki with satellites in the cities of Patras, Heraklion, and Ioannina - which are model hubs of expertise, training, and innovation, specializing in cutting-edge exponential technologies, in which graduates and young professionals undergo immersive experiences, continuous learning, gaining practical insights and hands-on training that empower them to navigate the complexities of the digital landscape.

Deloitte is an ideal working environment for both young and senior professionals who want to take the next step in their careers, offering them a supportive and international working environment that leverages their expertise and potential. Its corporate culture is based on trust and collaboration and ensures diversity and inclusion so that everyone feels part of a great team.

Technology & Transformation

Our Technology & Transformation teams empower organizations to navigate the future through technology-driven business transformation. Combining deep industry knowledge with cutting-edge technology, we deliver tailored solutions that drive innovation, enhance efficiency, promote cybersecurity, and foster sustainable growth.

This role is designed for professionals who go beyond writing code-individuals who can understand complex business challenges, critically evaluate solutions, leverage emerging technologies, and accelerate the delivery of impactful digital products. We are seeking adaptable, full-stack engineers who are comfortable working across different technology layers, embracing new tools, and pioneering the integration of Generative AI and prompt engineering methodologies into the daily development lifecycle to optimize workflow efficiency while maintaining high standards of quality, security, and maintainability.

As a Full-Stack Software Developer (AI Integration & Prompt Engineering), you will:

• Design, develop, and deliver scalable, secure, and high-quality end-to-end software solutions.
• Take ownership of full-stack technical workstreams and contribute to end-to-end project delivery.
• Collaborate with architects, product owners, designers, and fellow engineers to solve complex business problems.
• Leverage AI-assisted development tools responsibly to 8x personal productivity, accelerate delivery velocity, and enhance code quality.
• Develop, test, and refine advanced system prompts and context-sharing strategies to automate repetitive development workflows and enhance code generation accuracy.
• Apply critical thinking to challenge assumptions, assess trade-offs, and critically review/audit AI-assisted code outputs to ensure compliance with architectural standards.
• Contribute to architecture discussions, technical decision-making, and solution design across both frontend and backend systems.
• Foster a culture of collaboration, AI literacy, and continuous learning.
• Drive engineering excellence through code reviews, database optimization, testing practices, and DevOps principles.

We are interested in professionals who combine strong full-stack technical expertise with deep curiosity, adaptability, and an AI-forward growth mindset.

Key Qualifications

• A Bachelor’s/Master’s Degree in Computer Science, Information Technology, Engineering, Mathematics, or a related field.
• 1-4 years of professional full-stack software development experience.
• Solid grasp of backend logic, API design, database management, and modern frontend ecosystems (e.g., JavaScript, TypeScript).
• Demonstrated proficiency in interacting with LLMs, including an understanding of advanced prompting techniques, context window management, and mitigating model hallucinations.
• Knowledge of Communication Protocols and data formats (e.g., REST, HTTP, JSON).
• Knowledge of Relational Databases (e.g., MySQL, PostgreSQL, Microsoft SQL).
• Strong analytical problem-solving skills with the ability to diagnose when an AI-generated solution is optimal versus when a traditional architectural approach is required.
• Excellent communication and stakeholder management capabilities, with a focus on documenting prompt configurations and sharing AI-driven best practices.
• Ability to work effectively in agile and multidisciplinary teams.
• Strong interpersonal and communication skills in Greek and English is a must.
• Curiosity, critical thinking, and continuous improvement mindset.

Bonus Qualifications

• Practical experience integrating LLM APIs (e.g., OpenAI, Anthropic, Gemini) directly into production software.
• Familiarity with Vector Databases, Embeddings, or Retrieval-Augmented Generation (RAG) architectures.
• Experience working fluidly across multiple technology stacks and cloud infrastructures automated via AI-driven scripts.
• Strong architectural thinking and the ability to connect technical decisions with AI-driven workflow optimization.

Individuals who have a strong will to expand their knowledge of new technologies, a passion to grow within the company, and aspirations for career growth. At Deloitte we foster a consultative culture because the best decisions are made in collaboration with others. We approach our work with a collaborative mindset, teaming across businesses, geographies, and skill sets to deliver tangible, measurable, attributable impact. These are not aspirations, but principles that we all commit to today and every day.

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
• Private medical health insurance plan
• Ticket restaurant card
• Exclusive Discounts to several retail providers, restaurants and others
• Mobile phone
• Fresh fruits and unlimited coffee every day at our offices

Please note that all the well-being benefits mentioned above are subject to annual review

Deloitte offers integrated services that include Audit & Assurance, Tax and Legal, Strategy-Risk & Transactions Advisory, and Technology & Transformation. Our approach combines insight and innovation from multiple disciplines with global business and industry expertise to help our clients excel anywhere in the world. We deliver outstanding impact on the reputation and success of our clients, in Italy and globally. In pursuing this we contribute to a sustainable and prosperous society, and are firm believers in the positive impact business can and should have on the world it operates within.

We are led by a purpose, to make an impact that matters with clients, people and society. This purpose defines who we are and what we stand for. It's not about being the biggest. It’s about being the first choice for the largest and most influential clients, and the first choice for the best talent.

At Deloitte we foster a collaborative culture where talented individuals can produce their best work. We value innovative thinking, diverse insights and a genuinely distinctive level of customer service through our expertise and professionalism. We value difference, with respect at the heart of our inclusive culture.

From day one at our firm, practitioners are part of a community. Our development and career progression framework will help them develop the skills and capabilities to succeed. The wellness of our people and the ability to offer agile working arrangements is at the center of our unique talent experience. We create a workplace that encourages collaboration, creativity, inclusiveness to ensure our staff are supported, encouraged and feel a sense of purpose and meaning in what they do each day.

Sounds like the sort of role for you? Apply now.

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, PAEGA Building, Land Port Zone of the Port of Thessaloniki, 54626 Thessaloniki, Greece, are all companies of the Deloitte Central Mediterranean S.r.l. (“DCM”) geography. DCM, a company limited by guarantee registered in Italy with registered number 09599600963 and its registered office at Via Santa Sofia no.28, 20122, Milan, Italy is one of the Deloitte NSE LLP geographies. Deloitte NSE LLP is a UK limited liability partnership and member firm of Deloitte Touche Tohmatsu Limited, a UK private company limited by guarantee.

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