Lead Software Engineer

Lead Engineer

Epsilon is looking for a lead engineer to help drive the design, delivery, technical strategy, and execution of core capabilities for Epsilon Clean Room, our privacy-first data collaboration platform. In this role, you will lead through technical expertise, partner closely with product, architecture, and engineering stakeholders, and build scalable solutions that enable secure, data-rich collaboration for enterprise clients.

Deliver large-scale cloud-native data platforms primarily on AWS using REST APIs, microservices, 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, AWS services, event-driven architecture, and SQL/NoSQL databases, to solve complex engineering challenges and maintain platform excellence. 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. Lead product-wide technical initiatives focused on performance optimization, scalability, reliability, security, governance, and cost efficiency. Mentor and guide junior engineers, fostering a culture of innovation, accountability, collaboration, and technical excellence.

Education: Bachelor's degree in computer science, information technology, or a related technical field. Experience: 8+ years of software engineering experience designing, building, and maintaining large-scale production applications. Architecture: Proven expertise in distributed systems, microservices design, and building robust REST APIs. Tech-stack: Strong hands-on proficiency across the modern JavaScript/TypeScript ecosystem, including modern frontend frameworks (e.g., React, Next.js) and server-side runtimes/frameworks like Node.js, Express.js, NestJS, or Fastify. Data: Comprehensive experience with event-driven architectures and messaging technologies (Kafka, RabbitMQ, SNS/SQS), alongside broad proficiency across relational and NoSQL databases (PostgreSQL, SQL Server, Aurora, DynamoDB, MongoDB, Redis). Infrastructure: Deep experience building cloud-native applications on a major cloud platform (AWS, Azure, or GCP), utilizing core services for object storage, serverless compute, API management, and event routing. DevOps: Experience with Infrastructure as Code (IaC) tools like Terraform or Ansible, CI/CD pipeline automation, and comprehensive testing strategies. AI: Practical experience leveraging agent-assisted coding tools (e.g., Cursor, Claude Code) to optimize software delivery velocity without compromising on code quality.

Epsilon 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. 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 integrity. Work together to win together. Innovate with purpose. Respect all voices. Empower with accountability.