Senior AI Full Stack Developer

We are seeking a Senior AI Full Stack Developer who combines strong software engineering fundamentals with AI-augmented development practices. The ideal candidate is a self-starter with a solid Computer Science foundation, production-grade coding discipline, and demonstrated use of modern AI tooling – including prompt engineering and agentic coding workflows. This role is central to delivering enterprise-grade solutions.

Responsibilities:

Design, develop, test and deploy production-ready AI-driven full stack applications

Develop backend services including APIs, microservices and data pipelines along with modern frontend interfaces

Write high-quality, maintainable and testable code while leveraging AI coding assistants to accelerate delivery without compromising quality

Integrate AI/ML models into enterprise systems ensuring reliability, scalability and performance

Apply advanced prompt engineering techniques for code generation, refactoring, debugging, testing and documentation

Design and implement agentic development workflows where AI agents handle multi-step tasks

Review, validate and refine AI-generated code to meet production, security and architectural standards

Continuously explore and adopt emerging AI development tools, frameworks and best practices

Collaborate with Solution Architects, Product Owners and cross-functional teams to translate requirements into technical solutions

Participate in code reviews focused on quality, security and engineering excellence

Troubleshoot and resolve complex full stack technical issues

Requirements:

5+ years of professional software development experience delivering production systems

4+ years of experience in at least one primary programming language such as Python (preferred), TypeScript/JavaScript, Java, C# or Go

Bachelor’s degree in Computer Science, Software Engineering, Mathematics or related field; Master’s preferred

Strong foundation in computer science fundamentals including data structures, algorithms, systems design and database theory

Solid understanding of design patterns, SOLID principles, clean architecture and distributed systems

Proven ability to write clean, performant and production-ready code with strong ecosystem knowledge

Experience with at least one additional language or stack for full stack development

Hands-on experience with modern frameworks such as FastAPI, Django, Next.js or React

Experience working with relational, non-relational and vector databases (e.g., Pinecone, Weaviate, Chroma, pgvector)

Production experience with RAG architectures and LLM-based systems

Experience with agentic workflows and multi-agent systems including tool use, planning and memory

Familiarity with major LLM APIs such as OpenAI, Anthropic Claude, Google Gemini, AWS Bedrock or Azure OpenAI

Strong prompt engineering and optimization skills

Practical experience with AI-assisted development tools such as GitHub Copilot, Cursor, Claude Code or Amazon Q Developer

Experience with at least one cloud platform (AWS, Azure or GCP)

Familiarity with Docker, CI/CD pipelines and infrastructure-as-code

Self-starter mindset with ability to independently drive tasks and solve problems

Strong analytical thinking, communication and collaboration skills

Experience working in Agile/Scrum environments

Passion for continuous learning in AI and software engineering

Nice to have:

Experience with model fine-tuning or training custom AI models

Familiarity with LLM evaluation and observability tools such as RAGAS, LangSmith or Weights & Biases

Experience with event-driven architecture and streaming systems

Knowledge of AI security best practices

Open-source contributions or technical writing experience

Experience with graph databases such as Neo4j

We offer/Benefits:

Opportunity to Engineer your Future and to drive the world’s digital transformation with top industry clients

Personal development program that will allow you to be valued for your strengths

Wide range of professional trainings and workshops

Being part of a collaborative, fast-growing, and innovative design team

Established and accelerated growth toward different career paths, competencies, and roles

Broad projects variety and possible mobility between projects over the time

Collaboration in a multicultural environment and exchange of best practices with colleagues around the world

Varied social benefits, Sports, Transportation and Health programs

Work-life balance and flexible schedule, team buildings and sport opportunities

Modern office/collaboration spaces (incl. new Infinity Tower business center, Sofia)

Hybrid By Design – we provide you with the best productivity options from the 2 worlds. Meet, socialize and enjoy F2F time with your colleagues, while working from the modern EPAM’s office for a few days per week and benefit from the EPAM’s virtual working environment – making you able to be productive and work from remote for the rest of the week