Lead Software Engineer

The Product team forms the crux of our powerful platforms and connects millions of customers to the product magic. This team of innovative problem solvers develop and build products that help Epsilon be a market differentiator. They map the future and set new standards for our products empowered with industrys standards ML and AI capabilities. The team passionately delivers intelligent end-to-end solutions and plays a key role in Epsilons success story.

At Epsilon we run on our peoples ideas. Its how we solve problems and exceed expectations. Our team is now growing and we are on the lookout for skilled individuals who always set a higher standard by constantly challenging themselves and are experts in building customized solutions in the digital marketing space. So are you someone who wants to work with innovative 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 dedicated team thats not afraid to push boundaries or take risks.

What 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 using REST APIs micro services and event driven applications to build highly scalable and resilient systems.
• Work hands-on across the technology stack - including TypeScript JavaScript 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.

• B.E./ 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 TypeScript JavaScript 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 have

• Working 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.

When you join Epsilon well create something EPIC together.Were 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 8000 employees.

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

Our Culture: at 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. Epsilons 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 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.