Senior Software Engineer

Company Description See how Epsilon powers connected marketing by unlocking the full potential of data and identity. At Epsilon, we help leading brands use data, identity, and technology to drive measurable business outcomes.

Our Clean Room product enables privacy-first data collaboration, audience intelligence, and activation at scale, combining modern cloud architecture with data-rich capabilities for marketers, analysts, and data scientists.

As our platform evolves, we are also investing in agentic and AI-powered capabilities that help users automate complex workflows, accelerate insight generation, and interact with data and systems more intelligently and efficiently.

Overview Epsilon is looking for a Senior Software Engineer to drive the design, delivery, technical strategy, and execution of key capabilities within the 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, secure solutions that enable enterprise clients to collaborate on and derive value from data while preserving privacy.

You will play a pivotal role in advancing the platform's Clean Room Insights capabilities while maintaining the highest standards of privacy, security, and data governance.

Responsibilities

• Design, develop, and maintain large-scale cloud-native applications and platforms on AWS, leveraging REST APIs, microservices, and event-driven architectures to deliver resilient, secure, and high-performing solutions.
• Work hands-on primarily across APIs, microservices, and service-layer components, collaborating with frontend and data platform teams to deliver end-to-end Clean Room capabilities.
• 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.
• Provide technical guidance and support to team members through design reviews, code reviews, and collaborative problem-solving.

Qualifications

• Education: Bachelor’s degree in computer science, Information Technology, Engineering, or a related technical field.
• Experience: 7+ years of software engineering experience designing, building, and operating large-scale production applications, APIs, microservices, and distributed systems.

Architecture & System Design

Experience designing scalable, resilient, and secure distributed systems, event-driven architectures, and APIs, with a strong understanding of performance, reliability, observability, and maintainability.

API & Service Engineering

Strong experience designing, developing, securing, and operating scalable APIs, microservices, and distributed applications using modern JavaScript/TypeScript technologies.

Application Development

Experience building cloud-native applications and service-based solutions that support complex business workflows and customer-facing capabilities.

Messaging & Data Technologies

Experience with event-driven architectures, messaging platforms, and relational and NoSQL databases supporting scalable applications.

Cloud Engineering

Proven experience building and operating cloud-native applications on AWS, Azure, or GCP, leveraging services for compute, storage, API management, event routing, monitoring, and security.

DevOps

Experience with Infrastructure as Code (Terraform, Ansible, or similar tools), CI/CD automation, automated testing, logging, monitoring, observability, and production support for mission-critical services.

AI-Assisted Development

Practical experience leveraging AI-powered engineering tools such as Cursor, Claude Code, or GitHub Copilot to improve developer productivity while maintaining high standards of code quality. 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 Benefits 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.

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 who need accommodations to complete the application process. Please reach out to [email protected] 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.

Compensation

Range: USD $88,900.00 - USD $165,100.00/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. 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 11/6/2026.