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Epsilon

Epsilon

Senior Software Engineer

Location : Leominster, MA, 01453

Job Type : Full Time

Date Posted : 7 November 2025

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  4. Senior Software Engineer job in Leominster, MA, US

Base pay range

$80,250.00/yr - $133,750.00/yr
Overview

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

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
Additional information

When You Join Us, We’ll Create Something EPIC Together
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 LeaveofAbsence@epsilon.com 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.
Seniority level

Not Applicable
Employment type

Full-time
Job function

Engineering and Information Technology
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