A modern scalable cloud-based platform to support an expanding talent, health, retirement and investment business

“Exadel has been a great partner in this digital transformation journey with talented people with tons of knowledge and experience”

Rick Koo Digital Technology Leader at Mercer

About Mercer

Mercer makes a difference in the lives of more than 115 million people every day by advancing their health, wealth and careers. Headquartered in New York City, the firm operates in more than 130 countries, and is the largest provider of outsourced chief investment officers. Whether it’s designing affordable health plans, ensuring income for retirement, or aligning workers with workforce needs, Mercer is in the business of creating a more secure and rewarding future for its clients and employees. Using analysis and insights as catalysts for change, Mercer anticipates and understands the impact of business decisions on individuals now and in the future. Mercer sees people’s current and future needs through a lens of innovation. Its holistic view, specialized expertise, and deep analytical rigor underpin each and every idea and solution it offers. For more than 80 years, Mercer has turned insights into actions, enabling people around the globe to live, work and retire well.

The Challenge

Mercer Digital was looking to partner with a company that could support the growth of its digital business. They wanted to create a digital platform to build HR applications that support all of Mercer’s business units (career, health and wealth) that were scalable, powerful, and allow for modular addition of new components and features with ease.
Mercer Digital looked to Exadel for its agile capabilities — Mercer is an agile organization and believes deeply in the agile approach to problem-solving and software development. Any vendor it selected needed to be able to hit the ground running and provide value quickly.


Mercer had a vision for a different kind of technology infrastructure — one that leveraged the best of public cloud capabilities while supporting the migration of existing legacy applications into a common framework. That vision was MercerOS.

MercerOS is more than a software application. It is a platform that supplies the features of today while providing a basis for the features of tomorrow. MercerOS is a technology ecosystem that enables existing Mercer apps to move to microservices while offering insights into their carrier, healthcare, pension plan options, etc. It also offers an easy and clear way to get information, sign up and change benefits to Mercer’s customers. MercerOS is built around four pillars: a technology infrastructure, organizational agility, platform services and data.

MercerOS uses the public cloud and DevOps for continuous integration and delivery to increase speed to market as well as quality.

Exadel brought a deep wealth of knowledge in development and worked closely with Mercer’s teams, in an agile fashion, to develop MercerOS. Key technologies Exadel used were JavaScript (Angular and Node) with Drupal CMS and MongoDB on the backend, leveraging private/public (AWS) cloud infrastructure.


MercerOS has successfully transformed Mercer’s technology stack — creating a platform that brings together the best of the public cloud and allows legacy applications to integrate with it. The award-winning software that came out of the collaboration, MercerOS, lays the groundwork for the future, allowing Mercer to continue to deliver on its mission of making people’s lives better. Currently, more than 100 Mercer apps use MercerOS services. Since 2016 Exadel has contributed to the successful development of 37 projects, all of which are based on MercerOS. The Exadel team was able to pivot quickly to meet shifting requirements thanks to their agile development expertise, working closely with Mercer’s own agile teams.