Senior Software Engineer (Python + AI)
Why Join Exadel
We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.
From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.
What powers it all? Our people are ambitious, collaborative, and constantly evolving.
About the Client
Our client is one of the Big Four accounting firms and the world’s largest professional services network. Headquartered in London, they operate in 150+ countries with 460,000+ professionals delivering excellence in audit, tax, consulting, and advisory.
The team you will join designs, develops, and deploys innovative enterprise technology and AI-driven tools to support the delivery of tax services. It is a dynamic group combining expertise in tax, software engineering, change management, and project management, working on initiatives from tool design and deployment to training development and engagement management.
Project Tech Stack
Azure Cloud, Microservices Architecture, .NET 8, ASP.NET Core services, Python, MongoDB, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot, LangGraph, LangChain, RAG Pipelines, Multi-modal LLMs
What You’ll Do
- Providing requirements analysis, system design, Python and AI development, troubleshooting, performance optimization, and technical support
- Designing, developing, and maintaining scalable Python applications using FastAPI and Pydantic
- Implementing asynchronous and parallel programming solutions with asyncio
- Building agentic AI applications with frameworks such as LangGraph and LangChain
- Applying prompt engineering techniques - including design, refinement, and evaluation - to optimize LLM performance
- Developing and optimizing RAG pipelines with hybrid search and vector databases
- Integrating and experimenting with multi-modal GenAI models (text-to-image, text-to-audio, etc.)
- Conducting code reviews to ensure adherence to best practices and coding standards
- Working both independently and collaboratively within the team
- Providing clear instructions to team members and helping coordinate day-to-day operations
- Communicating with the client on a regular basis
- Providing technical leadership for the team – mentor, coach, and lead by example
What You Bring
- 5+ years of background in development
- Strong background in Python, FastAPI, and Pydantic
- Hands-on experience with asyncio, asynchronous/parallel programming
- Solid understanding of microservices architecture and scalable system implementation
- Experience using LLMs to solve real-world problems and developing agentic AI applications
- Understanding of RAG pipelines and hybrid search with vector databases
- Knowledge of multi-modal AI models and their practical applications
- Strong analytical and problem-solving abilities with a detail-oriented mindset
- Pragmatic approach to balancing process against flexibility in achieving objectives
- Excellent organizational skills, including the capacity to self-manage, structure work, set priorities, and work to deadlines
- Excellent troubleshooting and communication skills
Nice to have
- Bachelor’s or Master’s degree in Computer Science or Software Engineering
- Experience with Kendo UI or other component libraries
- Knowledge of MongoDB, Azure SQL
- Familiarity with Azure DevOps Build/Release configuration
- Experience with testing frameworks (Jasmine, Karma, Jest)
- Understanding of CI/CD pipelines and Git workflows
- Understanding of RAG pipelines and hybrid search with vector databases
Nice to have
- Bachelor’s or Master’s degree in Computer Science or Software Engineering
- Skill for writing reusable libraries
- Knowledge of MongoDB, NPM, Azure DevOps Build/Release configuration
- Experience with containerization and orchestration tools (Docker, Kubernetes)
English level
Want more jobs like this?
Get jobs in Sofia, Bulgaria delivered to your inbox every week.
Intermediate
Legal & Hiring Information
- Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
- Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
- Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Your Benefits at Exadel
Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.
- International projects
- In-office, hybrid, or remote flexibility
- Medical healthcare
- Recognition program
- Ongoing learning & reimbursement
- Well-being program
- Team events & local benefits
- Sports compensation
- Referral bonuses
- Top-tier equipment provision
Exadel Culture
We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.
Perks and Benefits
Health and Wellness
Parental Benefits
Work Flexibility
Office Life and Perks
Vacation and Time Off
Financial and Retirement
Professional Development
Diversity and Inclusion