Senior Python Developer

At BBH, Partnership is more than a form of ownership—it’s our approach to business and relationships. We know that supporting your professional and personal goals is the best way to help our clients and advance our business. We take that responsibility seriously. With a 200-year legacy and a shared passion for what’s next, this is the right place to build a fulfilling career.

Location: Kraków

Hybrid model: Hybrid model 3 days per week in the office /2 days for a parent of a child up to 4 years old

About the team:

We are looking for an experienced Senior Python Developer to join our team focused on AI and digital transformation. This role is designed for a senior, hands‑on engineer with a strong background in backend development, data processing, and production‑grade machine learning integration.
As a Senior Python Developer, you will play a key role in building scalable platforms and services that enable AI‑driven solutions. You will influence technical direction, ensure engineering quality, and mentor less experienced engineers, while working closely with Data Scientists, Product Owners, and Business Stakeholders.

In our team, you will be responsible for :

• Design, build, and maintain scalable Python‑based backend applications and services.
• Integrate machine learning models into production workflows, ensuring reliability, performance, and auditability.
• Own features end‑to‑end, from requirements analysis through implementation, testing, deployment, and production support.
• Collaborate closely with cross‑functional teams, including Product, Data Science, and Platform teams.
• Contribute to technical design and architectural decisions, promoting best practices and long‑term maintainability.
• Support and improve testing, CI/CD, and deployment processes.
• Perform code reviews and uphold high standards for code quality, reliability, and security.
• Mentor junior developers and actively contribute to team growth and technical standards.
• Troubleshoot, debug, and resolve complex issues in distributed systems.
• Work effectively in Agile / Scrum environments.

What we’re looking for:

• Strong experience with Python for backend and service development
• Solid knowledge of data structures, APIs, and backend systems
• Experience with AI/ML frameworks such as TensorFlow and/or PyTorch
• Experience integrating ML models into real‑world, production systems
• SQL and NoSQL databases with a strong focus on data modeling and performance
• Cloud platforms such as Azure, AWS, or GCP
• Container technologies: Docker and Kubernetes
• CI/CD pipelines and deployment automation
• Tools: Git, Jenkins, JIRA, Confluence
• 3+ years of hands‑on Python experience, with a strong senior‑level engineering profile
• Proven experience building enterprise‑grade backend systems
• Solid understanding of scalable architecture and design patterns
• Experience working with cloud‑native and containerized environments
• Experience working in Agile / Scrum teams
• Strong analytical and problem‑solving skills
• High attention to accuracy, quality, and operational stability

What we Offer:

• To encourage cultural awareness and philanthropy, BBHers have 1 Culture Celebration Day and 1 Community Service Day in addition to their paid standard vacation allowance
• Private medical care
• Life Insurance
• Employee Assistance Program - offering independent and confidential counselling services for you and your family. You can get support for topics including family, marriage and relationships, finances, and legal issues.
• Professional trainings and qualification support
• Wellbeing Program
• Online Social Fund benefit platform
• Social, sport and integration events
• Onboarding Program for new hires

We value diverse experiences. We value diverse experiences and transferrable skillsets. If your career hasn’t followed a traditional path, includes alternative experiences, or doesn’t meet every qualification or skill listed in the job description, please do go ahead and apply.

About BBH:

Brown Brothers Harriman (BBH) is a premier global financial services firm, known for premium service, specialist expertise, technology solutions and partnership approach to client management. Across Investor Services and Capital Partners, we work with an enviable roster of sophisticated clients who make BBH their first call when they are tackling their hardest challenges. Delivering for our clients and each other energizes us.

We believe that how we do our work is just as important as what we do. We are relentless problem solvers who know our best ideas come from collective debate and development—so we are never possessive about our ideas. Every day we come together as a diverse community of smart and caring people to deliver exceptional service and expert advice—creating success that lasts. No matter where you sit in the organization, everyone is empowered to contribute their ideas. BBHers can pick up the phone and call any colleague, and they are happy to help. Expanding your impact beyond your daily role is part of how we operate as trusted partners to one another.

We believe stability is a competitive advantage, but being stable means having the knowledge, skill, and discipline to evolve, often—pushing the boundaries of innovation. As a private partnership, every investment we make is in the relationships, technologies, products and development we believe are in the long-term interests of our clients and our people. Our long-tenured leaders are experts in their areas and are actively involved in the day-to day business, taking the time to provide guidance and mentoring to build the next generation of BBHers. Because we know, our success begins with yours.

Go to BBH.com to learn more about our rewards and benefits, philanthropy, approach to sustainability or how we support you to thrive personally, physically and financially.