Epsilon · 2 days ago
Lead Developer (Backend)
Chicago, IL
Full-time
Hybrid
Senior Level, Lead/Staff
$98K/yr - $182K/yr
8+ years expEpsilon is building the next-generation Retail Media Network (RMN) platform to power onsite advertising at scale. They are seeking a Lead Software Engineer to design and build scalable backend services, guide technical decisions, and mentor engineers to deliver resilient, high-performance systems.
AdvertisingDigital MediaEmailMarketingMobileSocial Media
Responsibilities
Lead the design and development of high-performance, distributed backend services for ad delivery and optimization
Collaborate with product, platform, and operations teams to integrate new capabilities into the platform
Improve system performance, fix production issues, and eradicate bottlenecks across the stack
Partner with DevOps/SRE to evolve CI/CD, monitoring, and performance tuning
Contribute to frontend integrations (SPAs, dashboards, tools) when needed, ensuring seamless workflows for internal and external users
Mentor and guide other engineers through design reviews, code reviews, and technical planning
Provide critically important services that support a unified onsite/offsite ad serving platform
Lead architectural improvements that reduce latency and increase throughput at scale
Champion engineering best practices around design, testing, automation, and observability
Influence the technical roadmap to ensure alignment between platform capabilities and business goals
Qualification
Required
Bachelor's degree in Computer Science or related field (or equivalent experience)
8+ years of software engineering experience, with a strong focus on backend and distributed systems
Deep expertise in Java and modern backend frameworks (Spring Boot or similar)
Experience with containerization and orchestration (Docker and Kubernetes)
Hands-on experience with streaming platforms (e.g., Kafka, Kinesis, Pulsar)
Strong knowledge of SQL and NoSQL databases, including schema design and query optimization
Solid understanding of system architecture, data flow design, and API performance optimization
Self-starter with demonstrated ability to lead initiatives with minimal oversight
Preferred
Experience in ad tech, especially in ad serving, RTB, or programmatic systems
Familiarity with cloud-native environments (AWS, Kubernetes, Docker)
Experience with frontend technologies (TypeScript, React, or Angular)
Experience working with data engineering and analytics pipelines
Benefits
Flexible time off (FTO), 15 paid holidays
Paid sick time
Parental/new child leave, childcare & elder care assistance, adoption assistance
Comprehensive health coverage
401(k)
Tuition assistance
Commuter benefits
Professional development
Employee recognition
Charitable donation matching
Health coaching and counseling
Company
Epsilon
Epsilon is an all-encompassing global marketing company, a leader in creating connections between people and brands.
5001-10000 employees
H1B Sponsorship
Epsilon has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (132)
2024 (128)
2023 (124)
2022 (201)
2021 (136)
2020 (137)
Funding
Current Stage
Late StageTotal Funding
unknown2019-04-15Acquired
Leadership Team
Myron Sojka
Chief Technology Officer
Lakshmana Gnanapragasam
Senior Vice President Strategy & Analytics
Recent News
Washington Technology
2025-12-19
Washington Technology
2025-12-09
2025-12-03
Company data provided by crunchbase