About Business Unit:

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 we are 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 talented individuals who always raise the bar by constantly challenging themselves and are experts in building customized solutions in the digital marketing space. 

What you will enjoy in this Role? 

So, are you someone who wants to work with cutting-edge 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 talented team that’s not afraid to push boundaries or take risks. 

Click here to view how Epsilon transforms marketing with 1 View, 1 Vision and 1 Voice.

As a Staff Software Engineer – Fullstack, you will:

• Design, build, and optimize highly scalable and secure web applications and APIs.
• Lead end-to-end development from architecture and design to deployment and maintenance.
• Work across the frontend (React/Next.js) and backend (Java/Spring Boot, Node.js, Python).
• Collaborate with product managers, designers, and engineers to deliver high-quality features.
• Implement cloud-native solutions using AWS or GCP, including microservices and serverless components.
• Optimize application performance, reliability, and observability.
• Establish and enforce coding standards, CI/CD practices, and DevOps workflows.
• Contribute to technical roadmaps and strategic architecture planning.
• Mentor and coach engineers, conducting code reviews and design sessions.
• Continuously evaluate new technologies to ensure we remain at the forefront of modern development.
• Strong written and verbal communication skills (in English) are required to facilitate work across multiple countries and time zones. Good understanding of Agile Methodologies – SCRUM.

• 12+ years of experience in software development, with deep expertise in fullstack engineering.
• Strong proficiency in modern frontend frameworks (React, Angular, or Vue).
• Hands-on experience with backend development using Java (Spring Boot), js, or Python.
• Solid understanding of RESTful APIs, GraphQL, and asynchronous messaging patterns (e.g., Kafka).
• Experience with cloud platforms (AWS or GCP) and cloud-native architectures (microservices, containers, serverless).
• Strong database skills, including SQL (MySQL, PostgreSQL) and NoSQL (MongoDB, DynamoDB).
• Expertise in system design, scalability, and high-availability architectures.
• Strong grasp of CI/CD pipelines, automated testing, and DevOps practices.
• Excellent problem-solving, communication, and leadership skills.

Preferred / Good-to-Have Skills

• Experience with Kubernetes and Docker for container orchestration.
• Knowledge of distributed systems and event-driven architectures.
• Familiarity with performance tuning and observability tools (ELK, Prometheus, Grafana).
• Background in ad-tech, mar-tech, or high-volume transactional systems.
• Familiarity with big data pipelines (e.g., Spark, Databricks) for analytics use cases is a plus
• Experience with data visualization using tools like Tableau or Power BI is a plus.
• AWS/GCP certifications are a plus.

Soft Skills

• Ability to collaborate across global teams and work in an Agile/Scrum environment.
• Proven track record of mentoring and growing engineering teams.
• Ability to manage multiple priorities in a fast-paced environment.
• Strong written and verbal communication skills to influence stakeholders and articulate technical solutions.

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

These pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose.

Epsilon is an Equal Opportunity Employer. 
Epsilon is committed to promoting diversity, inclusion, and equal employment opportunities by using reasonable efforts to attract, recruit, engage and retain qualified individuals of all ethnicities and backgrounds, including, but not limited to, women, people of color, LGBTQ individuals, people with disabilities and any other underrepresented groups, traits or characteristics.