Senior Software Engineer

Overview

We are seeking an experienced Senior Full Stack Engineer to join our Product Engineering team. This role will work on a team of engineers in all aspects of the software development lifecycle. This person will contribute significantly to both front‑end and backend development, maintaining alignment to our quality processes, contributing to component development, and collaborating with the rest of the team for cross‑team functionality.

We are seeking an experienced Senior Full Stack Engineer to join our Product Engineering team. This role will work on a team of engineers in all aspects of the software development lifecycle. This person will contribute significantly to both front‑end and backend development, maintaining alignment to our quality processes, contributing to component development, and collaborating with the rest of the team for cross‑team functionality.

• Contribute to the implementation and maintenance of our platform code and components, spanning both frontend and backend.
• Collaborate with platform, operations, and engineering teams across the organization.
• Ensure features are well‑tested, contributing to our continuous integration environment.
• Diagnose performance bottlenecks and solve critical production issues across the entire stack.
• Collaborate in designing solutions using both backend and frontend technologies.

• Deliver high‑performance, low‑latency software solutions for our platform.
• Enhance the platform with new technologies and techniques in both frontend and backend areas.
• Ensure robust testing and integration to maintain software quality.
• Identify and solve critical issues to maintain platform performance.

• What you’ll bring with you:
  • Bachelor’s degree in Computer Science or a related field, or equivalent experience, with 5+ years in full stack software development.
  • Knowledge of high‑performance software and clean architecture principles.
  • Experience with Single Page Applications (SPAs) using Type Script and Angular or other modern frameworks/technologies.
  • Strong expertise in backend development with Python or similar languages.
  • Experience working on low‑latency, high‑throughput systems.
  • Familiarity with public cloud providers and technologies like AWS, Azure, Kubernetes, and Docker.
  • Clear and honest communication are key to success in this role.
• Why you might stand out from other talent:
  • Master’s Degree in Computer Science or a related field
  • Exposure to working in the Ad Tech industry
  • Experience launching tech products across multiple sectors
  • Comfortable using tech platforms such as Salesforce, Eloqua, Asana, or similar
  • Familiarity with performance metrics and KPIs to assess GTM success

• 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

Base Salary: $88,900.00 – $

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.

The Final date to receive applications for this job posting is 06/16/2026.

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  to request an accommodation.