Overview
How You'll Make an Impact
A subsidiary of Publicis Groupe, Epsilon is a leading provider of multi-channel marketing services, technologies, and database solutions. At Epsilon, we do more than collect and store data. We help some of the world's biggest brands discover real opportunities inside the data @types, delimiters and decimals.
We are looking for a highly experienced Senior Software Engineer (7-10 years) to design, build, and scale robust backend systems using Java and Python in an Agile environment. This role has a strong emphasis on spec-driven AI-assisted development, where engineers leverage clear technical specifications and modern AI coding tools such as Cursor, Claude Code, and Kiro to accelerate development while maintaining high engineering rigor and production quality. Join us and do some truly astounding things.
Responsibilities
What You'll Achieve
Design, develop, and maintain scalable backend services using Java and Python
Apply spec-driven AI-assisted development as a core development practice, including:
Translating detailed functional and technical specifications into high-quality code using AI tools
AI-assisted code generation, refactoring, and optimization with strong human validation
Prompt-driven development aligned to explicit design and acceptance criteria
Intelligent debugging, test generation, and code reviews using tools like Cursor, Claude Code, and Kiro.
Build and integrate RAG-based solutions and Agentic AI workflows into enterprise systems
Lead system design and architecture discussions
Ensure high code quality through reviews, testing, and engineering best practices
Collaborate with product, data, platform, and cross-functional teams
Own and resolve complex production issues.
Qualifications
Who You Are
What you'll bring with you:
Bachelor's or Master's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
7-10 years of hands-on software development experience
Strong expertise in Java and Python
Strong backend engineering experience with Java (e.g., Spring or similar frameworks) and production-grade service development
Experience with common Java build and delivery tooling (e.g., Maven / Gradle) and source control workflows (e.g., Git, pull requests)
Strong Data Modeling skills and experience with relational and NOSQL databases
Experienced working in Unix/Linux environments, including automation and scripting
Mandatory experience with spec-driven AI-assisted development
Practical, day-to-day usage of AI coding tools such as Cursor, Claude Code, and similar platforms
Ability to validate, refine, and productionize AI-generated code against explicit specifications
Mandatory hands-on experience with:
RAG (Retrieval-Augmented Generation) architectures
Agentic AI systems (tool-using agents, orchestration, multi-step reasoning workflows).
Strong fundamentals in:
Data Structures & Algorithms
Object-Oriented Programming
Design Patterns and System Design.
Experience building and operating backend systems in production
Solid understanding of REST APIs, microservices, and distributed systems
Proven ability to own problems end-to-end , including driving design, implementation, testing, and production support
Demonstrated technical leadership (mentoring junior engineers, raising code quality via reviews, and ensuring implementations meet specifications and standards)
Experience working in Agile / Scrum teams.
Why you might stand out from other talent:
Frontend exposure using Angular or similar frameworks
Experience with Databricks, Spark , or large-scale data processing
Experience with data modeling, data warehousing, and/or building ETL pipelines
Cloud platforms ( AWS / Azure / GCP ) and DevOps practices
CI/CD pipelines, Docker, Kubernetes
Observability, monitoring, and performance tuning experience
Click here to view how Epsilon transforms marketing with 1 View, 1 Vision, 1 Voice. (https://www.youtube.com/watch?v=xpjtfpntuv8&t=1s)
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
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.
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Compensation Range: USD $88,900.00 - USD $165,100.00/Annually. This is the pay range the Company believes it will pay for this position at the time of this posting. Consistent with applicable law, compensation will be determined based on the skills, qualifications, and experience of the applicant along with the requirements of the position, and the Company reserves the right to modify this pay range at any time. Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan through a third-party benefits administration system once certain criteria have been met. Temporary roles may also qualify for participation in our 401(k) plan after eligibility criteria have been met. For regular roles, the Company will offer medical coverage, dental, vision, disability, 401k, and paid time off. The Company anticipates the application deadline for this job posting will be 6/30/2026.
