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Principal Software Engineer I - Platform generative AI

McKinsey & Company

McKinsey & Company

Software Engineering, Data Science
Lisbon, Portugal · Prague, Czechia
Posted on Mar 29, 2025
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Technology & Digital

Principal Software Engineer I - Platform generative AI

Job ID: 96635
  • Lisbon
  • Prague
  • San Jose
  • Sao Paulo


Do you want to work on complex and pressing challenges—the kind that bring together curious, ambitious, and determined leaders who strive to become better every day? If this sounds like you, you’ve come to the right place.

Your Impact

We are looking for a Principal Software Engineer with expertise with Python, API development, LLM experience and familiarity with SQL databases and cloud technology.
You’ll be a member of a global team working on generative AI initiatives, based in our Lisbon, Prague, São Paulo or San José offices. Our McKinsey’s Tech Ecosystem function is responsible for developing and delivering all technology solutions for the firm’s internal use. You will work in a product team with engineers, designers and product managers doing application development with an with the purpose delivering impactful AI solutions leveraging the best of the data within the firm.
As a Principal Software Engineer on the Lilli team, you will be at the forefront of our firm's generative AI initiatives. Your role will involve writing, testing, debugging, and maintaining application code using Python, React and NextJS. You will leverage industry leading LLMs to drive data retrieval and synthesis.
Your expertise will be crucial in identifying and resolving technical issues and challenges. This involves keeping up to date with the fast-moving technology of generative AI and leveraging the best of the industry to keep Lilli at the leading edge of generative AI products. You will be pivotal in driving innovation within our firm, delivering impactful AI solutions, and collaborating with a distributed team across North America, Europe, and Latin America.

Your Growth

You’ll work with the Lilli team focused on our leading internal AI tool. Our team is distributed across multiple locations, including offices in North America, Europe, and Latin America.
The Lilli team is dedicated to advancing the capabilities and applications of data retrieval and generative AI within our firm, driving innovation, and delivering impactful AI solutions.

Your qualifications and skills

  • Software Engineer with preferably 9+ years of experience
  • Proficiency in product architecture, end-to-end product journey, integration patterns, security
  • Strong programming skills in Python
  • Expertise in React and NextJS
  • Expertise with SQL databases, particularly PostgreSQL or cloud equivalent such as Amazon RDS
  • Experience utilizing LLMs and prompt engineering
  • Experience with CI/CD pipeline setup and management
  • Proficiency in using AWS cloud platform for deploying and managing applications, particularly AWS ECS
  • Proficiency with GitHub for version control and code collaboration
  • Knowledge of containerization
  • Strong conceptual problem-solving
  • Ownership mindset
  • Comfortable working in a fast-paced environment
Please review the additional requirements regarding essential job functions of McKinsey colleagues.
Industries
  • High Tech
Capabilities
  • Technology
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FOR U.S. APPLICANTS: McKinsey & Company is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by applicable law.

FOR NON-U.S. APPLICANTS: McKinsey & Company is an Equal Opportunity employer. For additional details regarding our global EEO policy and diversity initiatives, please visit our McKinsey Careers and Diversity & Inclusion sites.

FOR BRAZILIAN APPLICANTS: Applicants for job positions in any office in Brazil have flexibility regarding qualifications and McKinsey & Company will not require previous experience of more than 6 months. If the job description indicates preferred prior work experience of more than 6 months, applicants for such job position in the Brazilian offices must interpret the preferred qualification described as limited up to 6 months maximum.

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Job Skill Group - N/A
Job Skill Code - SSAR - Principal Software Engineer I
Function - Technology
Industry - High Tech
Post to LinkedIn - Yes
Posted to LinkedIn Date - Mon Mar 31 00:00:00 GMT 2025
LinkedIn Posting City - Prague
LinkedIn Posting State/Province -
LinkedIn Posting Country - Czech Republic
LinkedIn Job Title - Principal Software Engineer I - Platform generative AI
LinkedIn Function - Information Technology
LinkedIn Industry - Computer Software;Information Technology and Services;Management Consulting
LinkedIn Seniority Level - Executive
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