> Markdown version of [/jobs/ext/673737-senior-full-stack-software-engineer](https://www.wearedevelopers.com/jobs/ext/673737-senior-full-stack-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Software Engineer - **Company:** Fiserv, Inc. - **Location:** Berkeley Heights, NJ, United States - **Experience:** Expert - **Salary:** $110,000.0 - $186,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, HTML, Java (Programming Language), JavaScript (Programming Language), Agile Methodology, Cloud Engineering, Software Quality, Continuous Integration, Database Design, DevOps, Distributed Systems, Fault Tolerance, Iterative and Incremental Development, Java Virtual Machine (JVM), NoSQL, Object-Oriented Software Development, Software Architecture, Cloud Services, Software Engineering, SQL Databases, TypeScript, Web Applications, Multithreading, Cloud Platform System, Spring Cloud, ReactJS, Concurrency, Spring-boot, Kotlin, Containerization, Webpack, Information Technology, Graphql, Front End Software Development, Asynchronous Programming, Functional Programming, Restful APIs, Microservices - **Published:** June 27, 2026 - **Apply:** https://www.juju.com/job/00000000gbd0lt ## About the Role + Bachelor's degree in Computer Science or a related discipline. + 7+ years of professional software development experience. + 3+ years of hands-on experience developing highly scalable, fault-tolerant distributed systems. + 2+ years of technical leadership experience delivering complex systems into production. + Significant experience with software architecture, object-oriented design, and cloud systems. + Strong experience with multithreading, concurrency models, and asynchronous programming. + Proficiency with a focus area on the web, including deep knowledge of React, Webpack, modern tools, Typescript, and HTML. + Proven expertise in building and maintaining large-scale web applications. + Deep understanding of Javascript and HTML ecosystems with experience delivering web UIs as a feature developer. + Experience with at least one JVM language, such as Java, Kotlin, or Scala. + Hands-on experience working with Spring Boot, and preferably Spring Cloud. + Experience with developer tests and relevant testing frameworks. + Proven skills in database design and SQL, along with exposure to NoSQL datastores. + Experience designing intuitive and extensible Restful APIs and exposure to GraphQL APIs. + Practical experience with micro-apps, micro-services, and cloud-native applications. + Strong analytical and problem-solving skills with a demonstrable bias toward action. + Sound understanding of Computer Science fundamentals in algorithms and data structures. + Proactive self-starter with the ability to multi-task and work independently with minimal guidance. + Ability to write understandable, testable code with an eye toward maintainability, scalability, and performance. + Experience with lean methodologies, agile practices, and iterative development to incrementally deliver value. + Strong presentation skills, with the ability to effectively collaborate and communicate with technical peers and non-technical audiences. Experience that would be great to have: + Master's degree in Computer Science or a related discipline. + Professional cloud service provider certifications. + Hands-on experience with BDD, TDD, and relevant testing frameworks. + Knowledge of or a strong interest in learning functional programming. + Prior experience or direct exposure to POS (Point of Sale) systems. + Proven productivity with AI coding assistants and the ability to evaluate their output critically. ## Description + Lead the architecture, design, and development of web-based and front-end applications mainly using Javascript, Typescript, React, and HTML. + Contribute to the architecture, design, and development of server-side applications using JVM languages, container technologies, and cloud-native principles. + Write clean code using modern JS and Java syntax, maintaining a strong passion and keen eye for code quality and standards. + Collaborate with cross-functional, distributed agile teams with the flexibility to work across time zones. + Architect, build, and maintain robust, scalable, reliable, highly available, and performant applications. + Coach and mentor engineers to deliver efficient, extensible solutions and improve their technical and leadership skills. + Raise the bar on engineering excellence by advocating engineering best practices, lean agile methodologies, and a CI/CD DevOps mindset. + Triage bugs and evaluate their impact on product or service operations and quality with a strict focus on customer centricity. + Prioritize and multi-task between projects with the ability to easily handle changing priorities. + Contribute to the vision, strategy, and assist in driving the software technical roadmap. + Act as an excellent team player with strong empathy and critical thinking skills. + Responsibilities listed are not intended to be all-inclusive and may be modified as necessary. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) - [NoLoJS - Avoiding JavaScript Cruft with HTML and CSS - Aaron T. Grogg](https://www.wearedevelopers.com/videos/1806-nolojs-avoiding-javascript-cruft-with-html-and-css-aaron-t-grogg) - [Tomorrow's cloud data platforms - fully managed database-as-a-service (DBaaS)](https://www.wearedevelopers.com/videos/254-tomorrow-s-cloud-data-platforms-fully-managed-database-as-a-service-dbaas) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023)