Senior Software Engineer

Job Description Epsilon is looking for a Senior Software Engineer to help build and enhance core capabilities for Epsilon Clean Room, our privacy-first data collaboration platform. In this role, you will contribute as a strong individual contributor, partner with product, architecture, and engineering teams, and develop scalable solutions that enable secure, data-rich collaboration for enterprise clients. Responsibilities What You’ll Do Build and maintain cloud-native data platform features on AWS using REST APIs, microservices, and event-driven applications to support 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 deliver high-quality software solutions. Collaborate with engineering, product management, and architecture teams to translate requirements into reliable technical solutions. Own the design, development, testing, deployment, and support of assigned software components and services. Contribute to improvements in performance, scalability, reliability, security, and operational excellence across the platform. Write clean, maintainable code, participate in code reviews, and support team engineering standards and documentation. Qualifications Education: Bachelor’s degree in computer science, Information Technology, or a related technical field. Experience: 5+ years of software engineering experience designing, building, and maintaining production applications. Architecture: Experience building distributed systems, microservices, and robust REST APIs. Tech-Stack: Strong hands‑on proficiency with JavaScript/TypeScript, Node.js, and modern backend development frameworks and practices. Data: Experience with event‑driven architectures, messaging technologies, and relational or NoSQL databases. Infrastructure: Experience developing cloud‑native applications on AWS, Azure, or GCP using core platform services. DevOps: Experience with CI/CD pipelines, automated testing, and modern software development practices. AI: Practical experience leveraging agent‑assisted coding tools (e.g., Cursor, Claude Code) to optimize software delivery velocity without compromising on code quality. Preferred Qualifications Education: Master’s degree in Computer Science, Information Technology, or a related technical field. Experience: 8+ years of software engineering experience building scalable, enterprise‑grade applications. Data: Hands‑on experience with modern, big data platforms and processing frameworks such as Databricks, Snowflake, or PySpark. AI: Practical exposure to Generative AI architectures, including Large Language Models (LLMs), Retrieval‑Augmented Generation (RAG), and autonomous agentic systems. Who Thrives Here This is a strong opportunity for an experienced software engineer who enjoys solving complex technical problems, delivering high-quality software, and contributing to scalable platform capabilities through hands‑on engineering. If you are excited by the idea of building privacy‑first data systems in a fast‑moving environment, this role offers meaningful technical impact. Base Salary: $108,500.00 - $201,500.00 Actual compensation within the range will be dependent upon, but not limited to the individual’s skills, experience, qualifications, location and application employment laws. The salary pay range is subject to change and may be modified at any time. The application deadline for this job posting is 07/13/2026. Benefits Time to Recharge: Flexible time off (FTO), 15 paid holidays Time to Recover: 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 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 needing accommodations to complete the application process. Please reach out to View email address on click.appcast.io to request an accommodation. Act with integrity Work together to win together Innovate with purpose Respect all voices Empower with accountability For San Francisco Bay and Los Angeles Areas Epsilon will consider for employment qualified applicants with criminal histories 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. #J-18808-Ljbffr