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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Lead Software Engineer - **Company:** Epsilon, Inc. - **Location:** Chicago, IL, United States - **Experience:** Expert - **Salary:** $98,000.0 - $182,000.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Amazon S3, Microsoft Azure, Continuous Integration, Data Systems, DevOps, Distributed Systems, Amazon DynamoDB, Event-Driven Programming, Github, PostgreSQL, Microsoft SQL Server, MongoDB, Node.Js, NoSQL, Performance Tuning, RabbitMQ, Redis, Regression Testing, Cloud Services, Ansible, Amazon Simple Notification Service (SNS), Software Engineering, SQL Databases, TypeScript, Web Services, Google Cloud, Large Language Models, Express.js, Generative AI, Gitlab, Servicebus, Event Driven Architecture, Pyspark, Infrastructure Automation Frameworks, Information Technology, Deployment Automation, Data Analytics, Apache Kafka, Bitbucket, Data Management, Virtual Agents, Functional Programming, Api Gateway, NestJS, Restful APIs, Amazon Simple Queue Service (SQS), Terraform, Jenkins, Databricks, Microservices - **Published:** June 3, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=377239ac77abd801 ## About the Role Do you have experience in Web services design?, Do you have a Bachelor's degree?, * B.E./B.Tech/M.Tech/MCA in Computer Science, Information Technology, or a related field. * 8-10 years of strong software engineering experience, with deep expertise in building scalable UX driven applications and distributed systems architecture. * Proven experience designing and building scalable REST APIs, microservices, and distributed systems. * Strong hands-on expertise in Node.js, TypeScript, JavaScript, Express.js, NestJS, and Fastify. * Extensive experience with AWS services such as S3, Lambda, API Gateway, and EventBridge for building scalable, reliable, cloud-native data platforms. * Strong experience with messaging and event-driven technologies such as Kafka, RabbitMQ, SNS, and SQS, along with solid expertise in relational and * NoSQL databases including PostgreSQL, SQL Server, Aurora, DynamoDB, MongoDB, and Redis. * Hands-on experience with Infrastructure as Code (IaC) tools such as Terraform and Ansible. * Strong understanding of CI/CD and DevOps practices using tools such as Jenkins, GitHub/GitLab, Bitbucket, GoCD, and automated deployment pipelines. * Experience implementing robust testing strategies, including unit, integration, and regression testing, while adhering to engineering best practices. * Strong critical thinking and analytical skills, with the ability to diagnose, troubleshoot, and solve complex technical problems effectively. * Exposure to Generative AI technologies, including LLMs, RAG architectures, and Agentic AI systems, with experience designing and deploying AI-driven solutions. Nice to have * Working knowledge on PySpark & Databricks. * Experience working with Azure and/or Google Cloud Platform (GCP). * Experience building data platforms in privacy-safe or cleanroom environments. ## Description 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 skilled individuals who always set a higher standard by constantly challenging themselves and are experts in building customized solutions in the digital marketing space. So, are you someone who wants to work with innovative 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 dedicated team that's not afraid to push boundaries or take risks. What will you enjoy in this role? As a Lead Software Engineer in the Cleanroom team, you will drive design, delivery, technical strategy, and execution for mission-critical data systems. You will define engineering standards, influence long-term platform direction, mentor junior engineers, and ensure the Cleanroom platform scales securely and reliably to support sustained business growth. What will you do? * Deliver large-scale cloud-native data platforms primarily on AWS using REST APIs, micro services 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, NetJS, AWS services, event-driven architectures, and * SQL/NoSQL databases - to solve complex engineering challenges and maintain platform excellence. * Lead product wide technical initiatives focused on performance optimization, scalability, reliability, security, governance, and cost efficiency. * 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. * Mentor and guide junior engineers, fostering a culture of innovation, accountability, collaboration, and technical excellence. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more) - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Accelerating Authentication Architecture: Taking Passwordless to the Next Level](https://www.wearedevelopers.com/videos/733-accelerating-authentication-architecture-taking-passwordless-to-the-next-level) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)