Streaming Software Engineer Jobs in Illinois (NOW HIRING)

OverviewHow 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're looking for an outstanding Staff Software Engineer to provide technical leadership across multiple critical initiatives on an established, high-performing team.   This is a hands-on engineering leadership role - you will own the design, delivery, and operational health of solutions end-to-end, from architecture through production support. You will lead our progress toward development practices improved by artificial intelligence. You will guide by example with AI-assisted development based on clear specifications while maintaining the engineering rigor our production systems require.  

The right candidate offers deep expertise in Java/Spring Boot backend services and Databricks/Spark data platforms, the anchors of our current stack. They have a proven ability to mentor engineers, improve code quality, and collaborate with engineering, product, and architecture leadership.

ResponsibilitiesWhat You'll Achieve

• Take end-to-end ownership of solutions - from architecture and development through deployment, operations, and client-facing production support. This is not just a development role; strong DevOps sensibility and operational accountability are expected.
• Champion AI-assisted development based on detailed specifications as a core engineering practice across teams. Lead by example using tools like Cursor, Claude Code, and Kiro - and actively drive adoption so the broader engineering organization evolves with the industry.
• Architect, build, and integrate RAG-based solutions and Agentic AI workflows into enterprise systems.
• Lead design and delivery of Java/Spring Boot backend services and Databricks/Spark data platform solutions - the two anchors of our current production stack.
• Provide technical leadership in architecture reviews, sprint planning, and code review sessions; enforce coding standards and engineering guidelines.
• Mentor and develop engineers across the team. Focus especially on development practices guided by artificial intelligence and production-quality engineering.
• Collaborate across product, data, platform, and cross-functional teams to plan and deliver features aligned with the Epsilon PeopleCloud Platform.

Qualifications

Experience & Education

• Bachelor's or Master's degree in Computer Science, Engineering, or related field
• 10+ years of hands-on software engineering experience; 5+ years in cloud environments
• Demonstrated experience leading and mentoring engineering teams

Core Technical Skills

• Strong expertise in Java (Spring Boot or equivalent frameworks) and Python; Scala a plus
• Strong knowledge of Apache Spark and Databricks (Unity Catalog, Delta Lake, Workflows, Live Tables)
• Expertise in SQL, data warehousing, data streaming, and relational/NoSQL databases
• Solid understanding of REST APIs, microservices, and distributed systems
• Practical knowledge of at least one major cloud platform (AWS, Azure, or GCP)
• Experience with IaC tools (Terraform or Ansible), CI/CD pipelines, Docker, and Kubernetes

AI-Driven Development

• Mandatory hands-on, day-to-day usage of spec-driven AI assisted development using tools such as Cursor, Claude Code, or Kiro
• Ability to validate, refine, and productionize AI-generated code against explicit technical specifications
• Mandatory hands-on experience with RAG (Retrieval Augmented Generation) architectures
• Mandatory hands-on experience with Agentic AI systems (tool-using agents, orchestration, multi-step reasoning workflows)

Engineering Mindset

• Strong sense of operational ownership - comfortable supporting production systems, resolving incidents, and engaging on client-impacting issues
• Outstanding communication skills; proven ability to influence technical direction and collaborate across engineering, product, and architecture teams
• Experience in Test-Driven Development and agile scrum environments

Why you might stand out from other talent:

• Certifications in any of the subject areas listed above
• Frontend exposure (Angular or similar frameworks)
• Observability, monitoring, and performance tuning experience
• Experience working in Unix/Linux environments, including scripting and automation

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

Additional Information

When you join Epsilon, we'll create something EPIC together. We're a global leader in data and identity, with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services. Positioned at the center of Publicis Groupe, Epsilon helps brands deliver personalized experiences at scale and build lasting customer relationships by unlocking the full potential of data and identity. Epsilon operates in 30+ countries across EMEA, the Americas and APAC, with more than 8,000 employees.

Check out a few of these resources to learn more about what makes Epsilon so EPIC:

Our Culture: https://www.epsilon.com/us/about-us/our-culture-epsilon

Life at Epsilon: https://www.epsilon.com/us/about-us/epic-blog

Epsilon has five values that define our culture and guide us as we create value for our clients, our people and consumers. We seek candidates who align with our company values, demonstrate them and make them meaningful in their day-to-day work:

• Act with integrity. We are transparent and have the courage to do the right thing.
• Work together to win together. We believe collaboration is the catalyst that unlocks our full potential.
• Innovate with purpose. We shape the market with big ideas that drive big outcomes.
• Respect all voices. We embrace differences and foster a culture of connection and belonging.
• Empower with accountability. We trust each other to own and deliver on common goals.

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:

• Time to recharge: Flexible time off (FTO), 14 paid holidays, 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 who need 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 qualified applicants with criminal histories for employment 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. 

 Compensation Range: USD $105,000.00 - USD $195,000.00/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. 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 9/30/2026.Employment Type: FULL_TIME