Full Stack Developer

Company Description

See how Epsilon powers connected marketing by unlocking the full potential of data and identity.

Overview

As a Full Stack Developer on the Automation & Infrastructure team, you’ll build and support internalapplications and integrations that automate workflows and help operational teams work more efficiently. You’ll work directly with internal users and project teams to understand their workflows and turn requirements into practical software solutions.

In this mid-level role, you’ll independently own clearly scoped features and improvements through development, testing, deployment, and ongoing support, collaborating with senior engineers on broader architecture decisions.

Responsibilities

What You’ll Achieve

• Build and maintain usable, accessible web applications using TypeScript and modern frontend frameworks.
• Develop secure, well-structured APIs and backend services using Node.js and frameworks such as NestJS or Express.
• Write clean, maintainable code and automated tests appropriate to the change.
• Participate in code reviews and contribute to shared development practices.
• Troubleshoot application and integration issues using logs, monitoring, and other diagnostic tools.
• Work with internal users to clarify requirements, validate workflows, and improve existing applications.
• Contribute to AI-enabled application features and workflow automation where appropriate.

Qualifications

Who You Are

• Bachelor’s degree in Computer Science or a related field, or equivalent practical experience.
• 2+ years of professional software development experience, including experience delivering and supporting production applications.
• Strong proficiency in TypeScript and experience with Angular or another modern frontend framework.
• Experience building backend applications and APIs with Node.js and frameworks such as NestJS or Express.
• Experience building data-driven web applications and integrating with internal or external APIs.
• Working knowledge of relational databases and SQL, such as PostgreSQL or MySQL.
• Experience writing automated tests and troubleshooting application issues.
• Proficiency with Git and collaborative development workflows.
• Experience developing or supporting applications in Linux-based environments.
• Ability to break work into manageable increments, communicate progress and dependencies, and raise blockers or priority conflicts early.
• Ability to clarify requirements with technical and non-technical partners and explain technical decisions clearly.

Why you might stand out from other talent:

• Experience with Docker and containerized application deployments.
• Experience with CI/CD pipelines and modern DevOps practices.
• Experience with scripting languages such as Python or Bash.
• Experience integrating AI services or APIs into applications, including handling structured outputs, validation, and failure cases.
• Experience building internal applications, workflow automation, or integrations that replace manual operational processes.

Additional Information

When you join Epsilon, we’ll create something EPIC together. We’re 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 8,000 employees.

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

Our Culture: https://www.epsilon.com/us/about-us/our-culture-epsilon

Life at Epsilon: https://www.epsilon.com/us/about-us/epic-blog

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 dese