Staff Software Engineer

Overview About Epsilon At Epsilon, we build advanced software solutions and intelligent data platforms that help global brands unlock value at scale. We operate at the intersection of cloud, data engineering, and high‑performance backend systems. Why This Role We are a small engineering team and are hiring a Staff Software Engineer to be a force multiplier —someone who can materially raise technical standards, improve delivery momentum, and lead complex engineering efforts through hands‑on execution and influence. This is a Staff‑level individual contributor role : no people management, but significant ownership, architectural responsibility, and team impact. What You’ll Do Own the architecture and delivery of high‑performance backend services and REST APIs (Java), from design through production. Design, build, and optimize data‑intensive systems, including Spark workloads and performance tuning. Deliver cloud‑native solutions across AWS, Azure, and GCP, integrating with platforms such as Databricks. Raise the engineering bar by leading design reviews, improving code quality and operational practices, and mentoring other engineers. Use AI‑assisted engineering tools (e.g., coding copilots, test generation, refactoring, design exploration) to increase speed and quality—and help establish team norms for responsible, effective use. What We’re Looking For Proven experience building and operating production distributed systems. Strong backend expertise in Java and data‑driven services at scale. Hands‑on experience with Apache Spark and modern data tooling (Hadoop/Hive exposure a plus). Solid cloud experience (AWS, Azure, or GCP) and modern platform tooling (Kubernetes, Docker; Airflow or equivalents). Demonstrated Staff‑level behaviors: strong technical judgment, cross‑team influence, and the ability to level up others through mentorship and standards. Our Current Stack Backend: Java, RESTful microservices, occasional Python Data: Spark, Databricks, PostgreSQL, Scylla Cloud: AWS, Azure, GCP Platform: Kubernetes, Docker, some AWS Lambda Who Thrives Here You enjoy solving ambiguous problems, care deeply about engineering quality, and lead by building. You’re the engineer teams rely on to get unstuck, make sound technical tradeoffs, and ship durable systems. 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 View email address on click.appcast.io 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. #J-18808-Ljbffr Publicis Groupe Holdings B.V