Oliver Wyman, a business of Marsh McLennan (NYSE: MMC), is a management consulting firm combining deep industry knowledge with specialized expertise to help clients optimize their business, improve operations and accelerate performance. Marsh McLennan is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $24 billion and more than 90,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. For more information, visit oliverwyman.com, or follow on LinkedIn and X.

The Opportunity:

The Analytics Application Developer is a Full Stack Software Engineer with strong experience in modern front-end development and hands-on exposure to Python and React. Ideal candidate will be responsible for creating tools and platforms that enable users to interact with data in meaningful ways bridging the gap between data analytics and software development.

This is a hybrid role - 3 days per week working from the Warsaw Oliver Wyman office.

Key Responsibilities:

• Contribute to the design and development of applications using MEAN/MERN (MongoDB, Express.js, Angular or React, Node.js) and Python FastAPI.
• Develop and maintain applications that enable data exploration, visualization, and reporting.
• Design and Familiarity with microservices and API-first development.
• Develop and deploy applications with a solid understanding of container technologies (e.g., Docker, Kubernetes, or similar).
• Possess strong programming skills, knowledge of data warehousing and visualization tools
• Develop clean, responsive, and accessible UIs using: HTML5, CSS3, JavaScript/TypeScript, React
• Optimize front-end performance for speed and scalability

Experience Required:

• Bachelor’s degree in Computer Science, Software Engineering, or related field — or equivalent practical experience with demonstrable projects.
• 3+ years of of professional software engineering experience.
• Experience working with Python, preferably with FastAPI.
• Experience working with MEAN or MERN stack (Node.js, Express.js, Angular or React, MongoDB)
• Experience with both SQL and NoSQL databases
• Styling: CSS, Tailwind, Bootstrap, Sass
• API integrations and JSON data handling
• Good understanding of Git, CI/CD pipelines, and Agile development
• Experience building responsive, scalable, and cross-browser-compatible interfaces

Preferred (Good to Have):

• Experience with UI component libraries (Material UI, Hero UI)
• Experience working on B2B SaaS or enterprise applications

Your Skills and Attributes:

• Excellent problem-solving and critical thinking skills required
• Strong spirit of innovation, self-starter, independent, and with ability to come up with solutions to meet business problems
• Self-motivated with ability to work independently while also enjoying collaboration with cross-functional teams and other analysts
• Strong desire to learn new skills and pass knowledge acquired onto others
• Strong relationship building skills and ability to build alignment among customers and key stakeholders with demonstrated experience influencing without authority
• Ability to work effectively in a fast paced, deadline driven, highly dynamic atmosphere and react quickly to changes and shifting priorities.
• Effective communication skills and ability to translate numbers into a story
• Attention to detail and user-centric approach
• Fluent English.

What we can offer you:

• Full time job contract with an attractive compensation package
• Flexible benefits package which you can tailor to your needs (e.g. private health care, insurance, sport card, lunch card, gift card, saving plan, pension plan)
• Opportunity for professional growth in a stable, global company
• Access to mentoring and training programs
• Inclusive culture with Employee Resources Groups and CSR activities
• Working in diverse and dynamic teams, friendly and flexible workplace that promotes work-life balance
• A range of digital collaboration and online communication tools to support effective team work
• Various social initiatives and learning opportunities adapted for virtual settings
• Fresh fruit, beverages and snacks while working in our modern office near the city center.

Marsh McLennan is committed to creating a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age, background, disability, ethnic origin, family duties, gender orientation or expression, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, or any other characteristic protected by applicable law.