Senior software engineer

Epsilon
Chicago, IL
Overview

About Epsilon PeopleCloud Discovery

The successful candidate will use expertise in modern web application design and development to advance the Epsilon PeopleCloud Discovery application. Epsilon PeopleCloud Discovery empowers users with a deep understanding of millions of people—on a marketing platform that unites audience insights, segmentation, creative analysis, media planning and digital activation. It includes a consistent, transparent, best-in-class approach to data, analytics solutions, partnerships and technology via a closely joined network of engineers, technology experts, product designers, analysts and data scientists all empowering marketing and digital business transformation.

The PeopleCloud Discovery engineering team is a full-stack development team. Day-to-day duties include building rich user interfaces using the Angular framework, developing microservices to provide data to the Discovery UI or other applications in the Epsilon PeopleCloud ecosystem, interacting with a variety of data stores including PostgreSQL, Databricks, real time analytics Databases and expanding our DevOps capabilities in continuous integration, deployment and infrastructure-as-code. As a Senior Software engineer on the PeopleCloud Discovery team, you will be responsible for rapidly building out new features and feature enhancements, as well as ongoing maintenance.

Core Responsibilities

What You'll Accomplish:

Role

In this role, you will be expected to drive Epsilon’s mission to grow our clients' businesses through the transformative application of data. Your key priorities will include but are not limited to:

  • Building new features and feature enhancements; contributing to ongoing maintenance
  • Contributing to ongoing refinements of our coding style and development processes
  • Embracing strong, agile development methods, including development with tests, infrastructure as code, and continuous integration and deployment.
  • Designing, creating, maintaining, and optimizing a modern web application platform for user interaction, data visualization and workflow management.
  • Evaluating and prototyping new technologies in web application interfaces, APIs, and data management technology.
  • Thinking quickly, communicating clearly, and working collaboratively with product, engineering, QA, and operations teams.

What You'll Bring With You

To successfully accelerate and impact the business objectives in this role, you must bring a fresh perspective with prior experience. Qualification requirements and experience include but are not limited to:

  • 4 - 6 years of professional web application development experience, using Java or JavaScript/TypeScript as the primary programming language.
  • 3+ years of in-depth experience building Single Page Application (SPA) user interfaces using Angular, React or Vue.js.
  • Experience developing using a Test-Driven Development (TDD) approach and knowledge of when/how to test pragmatically.
  • Understanding of algorithms, complexity, and data structures.
  • Knowledge of object-oriented programming (OOP) principles and ability to leverage applicable design patterns.
  • Experience building data visualizations with front-end JavaScript libraries.
  • Experience with relational database systems and ability to write efficient SQL queries.
  • Familiarity and experience with agile development practices.
  • Outstanding communication skills (oral, written and presentation) and strong interpersonal skills.
  • High energy level, strong team player and good work ethic.
  • Ability to drive technical design for system components.
  • Experience providing technical mentorship to junior engineers.
  • Ability to review code written by others and provide constructive feedback.
  • B.S. in Computer Science, Computer Engineering, or related field.
  • Experience building cloud-native applications using AWS services.
  • Digital marketing and advertising domain knowledge.
  • Experience creating complex data visualizations.

Click here to view how Epsilon transforms marketing with 1 View, 1 Vision, 1 Voice.

Base Salary: $88,900 - $165,00

Actual compensation within the range will be dependent upon, but not limited to the individual’s skills, experience, qualifications, location and application employment laws. The salary pay range is subject to change and may be modified at any time.

Additional Information

When You Join Us, We’ll Create Something EPIC Together

Epsilon is a global data, technology and services company that powers the marketing and advertising ecosystem. For decades, we’ve provided marketers from the world’s leading brands the data, technology and services they need to engage consumers with 1 View, 1 Vision and 1 Voice. 1 View of their universe of potential buyers. 1 Vision for engaging each individual. And 1 Voice to harmonize engagement across paid, owned and earned channels.

Epsilon’s comprehensive portfolio of capabilities across our suite of digital media, messaging and loyalty solutions bridge the divide between marketing and advertising technology. We process 400+ billion consumer actions each day using advanced AI and hold many patents of proprietary technology, including real-time modeling languages and consumer privacy advancements. Thanks to the work of every employee, Epsilon has been consistently recognized as industry-leading by Forrester, Adweek and the MRC. Epsilon is a global company with more than 9,000 employees around the world.

Our pillars aren't just words. They're how we show up every day.

  • People centricity: We focus on employee well-being in an environment where colleagues truly care about each other.
  • Collaboration: We work together, support one another, and collectively achieve goals.
  • Growth: There are endless opportunities for growth through learning, development and career advancement.
  • Innovation: We drive progress through cutting-edge solutions and forward-thinking approaches.
  • Flexibility: We’ve created a balance between work and personal life, and we encourage adaptability to solve problems creatively.

Our values guide us to create value for our clients, our people and consumers.

  • Act with integrity
  • Work together to win together
  • Innovate with purpose
  • Respect all voices
  • Empower with accountability

These pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose.

Because You Matter

Benefits

As an Epsilon employee, you deserve perks and benefits that put you, your family and your finances first. Our benefits encompass a wide range of offerings, including but not limited to the following:

  • Time to Recharge: Flexible time off (FTO), 15 paid holidays
  • Time to Recover: Paid sick time
  • Family Well-Being: Parental/new child leave, childcare & elder care assistance, adoption assistance
  • Extra Perks: Comprehensive health coverage, 401(k), tuition assistance, commuter benefits, professional development, employee recognition, charitable donation matching, health coaching and counseling

Epsilon benefits are subject to eligibility requirements and other terms.

Epsilon is an Equal Opportunity Employer. Epsilon’s policy is not to discriminate against any applicant or employee based on actual or perceived race, age, sex or gender (including pregnancy), marital status, national origin, ancestry, citizenship status, mental or physical disability, religion, creed, color, sexual orientation, gender identity or expression (including transgender status), veteran status, genetic information, or any other characteristic protected by applicable federal, state or local law. Epsilon also prohibits harassment of applicants and employees based on any of these protected categories. Epsilon will provide accommodations to applicants needing accommodations to complete the application process. Please reach out to [email protected] to request an accommodation.

For San Francisco Bay and Los Angeles Areas: Epsilon will consider for employment qualified applicants with criminal histories in a manner consistent with the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance and San Francisco Police Code Sections 4901-4919, commonly referred to as the San Francisco Fair Chance Ordinance. Applicants with criminal histories are welcome to apply.

Posted 2026-01-24

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