Principal Software Engineer

Location: Wrocław or Warszawa

Hybrid model: 2 days office/3 days remote

The opportunity

• Leads the delivery of solution or infrastructure development services for a large or more complex project, using strong technical capabilities and outstanding hands-on experience!
• Takes accountability for the design, development, delivery and maintenance of solutions or infrastructure, driving compliance with and contributing to the development of relevant standards
• Fully understands business and user requirements and ensures design specifications meet the requirements from a business and technical perspective

Your key responsibilities

• Solves complex and escalated aspects of a project, performing coding, debugging, testing and troubleshooting throughout the development process
• Provides advanced technical expertise to maximize efficiency, reliability and value from current solutions, infrastructure and emerging technologies, showing technical leadership and identifying and implementing continuous improvement plans
• Develops strong working relationships with peers across Development & Engineering and Architecture teams, collaborating to develop and engineer leading solutions
• Provides a leadership role for the work group, ensuring the appropriate expectations, principles, structures, tools and responsibilities are in place to deliver the project
• Drives consistency to the relevant processes, procedures, standards, technical design whilst supporting the definition, maintenance and implementation of technology standard

Skills and attributes for success

• Advanced technical proficiency in designing, developing, and debugging solutions
• Advanced knowledge of one or more of: C#/Java or Python
• Bachelor’s degree in computer science, Engineering, IT, Mathematics, or related field preferred
• More than 10 years applied experience
• Significant relevant experience in either an internal or external software or platform engineering role, or similar
• Technical knowledge and experience in delivering software / platform engineering solutions (depending on specialism), providing comprehensive technical advice and handling user requirements
• CI/CD delivery using code management, configuration management and automation tools such as GitHub, ADO
• Proficiency in fine-tuning language models for specific tasks, including text generation, summarization, or question answering
• Knowledge of embedding models and their application in NLP tasks like similarity matching, clustering, and information retrieval
• Familiarity with designing and implementing agentic systems that combine AI models with external tools or environments for autonomous decision-making
• Ability to design robust evaluation frameworks for AI models and agents, including metrics development, A/B testing, and performance benchmarking

Ideally, you’ll also

• Microsoft/Google/AWS certificates
• Delivery using modern methodologies
• Significant proven experience in building application using container-orchestration systems like Kubernetes, and container engines like Docker

What we look for

• A self-starter, independent-thinker, curious and creative person with ambition and passion

What we offer

EY Global Delivery Services (GDS) is a dynamic and truly global delivery network. We work across ten locations – Argentina, China, Hungary, India, the Philippines, Poland, Sri Lanka, Mexico, Spain and the United Kingdom – and with teams from all EY service lines, geographies and sectors, playing a vital role in the delivery of the EY growth strategy. From accountants to coders to advisory consultants, we offer a wide variety of fulfilling career opportunities that span all business disciplines. In GDS, you will collaborate with EY teams on exciting projects and work with well-known brands from across the globe. We’ll introduce you to an ever-expanding ecosystem of people, learning, skills and insights that will stay with you throughout your career.

• Continuous learning: You’ll develop the mindset and skills to navigate whatever comes next.
• Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
• Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.
• Diverse and inclusive culture: You’ll be embraced for who you are and empowered to use your voice to help others find theirs.