Lead Software Engineer

Job Description The Product team forms the crux of our powerful platforms and helps connect millions of customers worldwide with the brands that matter most to them. This team of innovative problem solvers develops and builds products that position Epsilon as a differentiator, encouraging an open and balanced marketplace built on respect for individuals, where every brand interaction holds value. Our full‑cycle product engineering and data teams chart the future and set new benchmarks for our products, by using industry standard methodologies and sophisticated capabilities in data, machine learning, and artificial intelligence.

Driven by a passion for delivering smart end‑to‑end solutions, this team plays a key role in Epsilon’s success story. Why are we looking for you? At Epsilon, we run on our people’s ideas.

It’s how we solve problems and exceed expectations. Our team is now growing, and we are on the lookout for dedicated individuals who always set the standard by constantly challenging themselves and are experts in building customized solutions in the digital marketing space. If you want to work with pioneering technology and enable marketers to create data‑driven, omnichannel consumer experiences through data platforms, then you could be exactly who we are looking for.

Apply today and be part of a creative, innovative, and experienced team that’s not afraid to push boundaries or take risks. What will you enjoy in this role? As a Lead Software Engineer in the CDP team, you will drive design, delivery, technical strategy, and execution for critically important data systems.

You will define engineering standards, influence long‑term platform direction, mentor junior engineers, and ensure the CDP and Foundations platform scales securely and reliably to support sustained business growth. Responsibilities Deliver large‑scale cloud‑native data platforms primarily on AWS using REST APIs, micro services and event driven applications to build highly scalable and resilient systems. Work hands‑on across the technology stack – including Java, Python, Spark, TypeScript, JavaScript, Angular, AWS services, event‑driven architectures, and SQL/NoSQL databases – to solve complex engineering challenges and maintain platform excellence.

Lead product‑wide technical initiatives focused on performance optimization, scalability, reliability, security, governance, and cost efficiency. Partner closely with global engineering, product management, architecture, and business partners to align technical solutions with strategic business objectives. Own the end‑to‑end software development lifecycle, including requirements gathering, solution design, development, deployment, observability, and documentation.

Mentor and guide junior engineers, fostering a culture of innovation, accountability, collaboration, and technical excellence. Qualifications B.E./B.Tech/M.Tech/MCA in Computer Science, Information Technology, or a related field. 8–10 years of strong software engineering experience, with deep expertise in building scalable UX‑driven applications and distributed systems architecture. Proven experience designing and building scalable REST APIs, microservices, Kubernetes, and distributed systems.

Experience in Data Warehousing, Data Lakes, Delta Lake architecture, and modern big data ecosystem designs. Strong hands‑on expertise in Python, Java, Angular and well‑versed with object‑oriented design patterns and functional programming. Expertise in PySpark, and Apache Spark, with proven experience building high‑performance distributed data processing solutions.

Solid depth in Micro‑services development with Kubernetes containerization for eventing and serving. Extensive experience with AWS services such as S3, Lambda, API Gateway, and EventBridge for building scalable, reliable, cloud‑native data platforms. Strong experience with messaging and event‑driven technologies such as Kafka, SNS, and SQS, along with solid expertise in relational and NoSQL databases including PostgreSQL, SQL Server, Aurora, DynamoDB, MongoDB, and Redis.

Hands‑on experience with Infrastructure as Code (IaC) tools such as Terraform and Ansible. Strong understanding of CI/CD and DevOps practices using tools such as Jenkins, GitHub/GitLab, Bitbucket, GoCD, and automated deployment pipelines. Experience implementing robust testing strategies, including unit, integration, and regression testing, while adhering to engineering best practices.

Strong critical thinking and analytical skills, with the ability to diagnose, troubleshoot, and solve complex technical problems effectively. Exposure to Generative AI technologies, including LLMs, RAG architectures, and Agentic AI systems. Nice to have: Working knowledge of PySpark with Databricks.

Experience working with Azure and/or Google Cloud Platform (GCP). Experience building data platforms in privacy‑safe or Customer Data Platforms and Marketing Technology environments. Benefits 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 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.

Compensation Range: USD 112,700.00 – USD 209,300.00 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, 401(k), and paid time off.

The application deadline for this job posting is 6/29/2026. #J-18808-Ljbffr