Lead Software Engineer

OverviewThe Product team forms the crux of our powerful platforms and connects millions of customers to the product magic. This team of innovative problem solvers develops and builds products that help Epsilon be a market differentiator. They map the future and set new standards for our products, empowered with industry guidelines, ML and AI capabilities. The team passionately delivers intelligent end-to-end solutions and 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 looking for dedicated individuals who constantly improve by challenging themselves and excel at building customized solutions in digital marketing. So, are you someone who wants to work with brand new technology and enable marketers to build 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 talented team that’s not afraid to push boundaries or take risks. ResponsibilitiesWhat will you enjoy in this role?As a Lead Software Engineer in the Cleanroom team, you will drive design, delivery, technical strategy, and execution for mission-critical data systems. You will define engineering standards, influence long-term platform direction, mentor junior engineers, and ensure the Cleanroom platform scales securely and reliably to support sustained business growth.What will you do?Deliver large-scale cloud-native data platforms primarily on AWS leveraging REST APIs, micro services and event driven applications to build highly scalable and resilient systems.Work hands-on across the technology stack - including Node.js, TypeScript, JavaScript, Express.js, NetJS, 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 stakeholders 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.QualificationsQualificationsB.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, and distributed systems.Strong hands-on expertise in Node.js, TypeScript, JavaScript, Express.js, NestJS, and Fastify.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, RabbitMQ, 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, with experience designing and deploying AI-driven solutions.Nice to haveWorking knowledge on PySpark & Databricks.Experience working with Azure and/or Google Cloud Platform (GCP).Experience building data platforms in privacy-safe or cleanroom environments.Click here to view how Epsilon transforms marketing with 1 View, 1 Vision, 1 Voice.Additional InformationWhen You Join Us, We’ll Create Something EPIC TogetherEpsilon 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 integrityWork together to win togetherInnovate with purposeRespect all voicesEmpower with accountabilityThese pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose.Because You MatterAs 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 holidaysTime 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 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.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, 401k, and paid time off. The Company anticipates the application deadline for this job posting will be 9/7/2026.