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Senior Full Stack Developer

Fiserv

$110,000 - $186,000
Dec 5, 2025
Berkeley Heights, NJ, US
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Fiserv is looking to hire a Senior Full Stack Developer to design and build digital and AI-powered features for the Finxact.io platform, aiming to bring innovation and efficiency to meet client and partner needs.

Requirements

  • 4+ years of development experience in Go, TypeScript, React, or an equivalent language
  • 2+ years of experience with relational databases, Docker, and GIT
  • 2+ years of experience utilizing critical thinking and research strategies to augment existing codebases
  • 2+ years of experience leading development initiatives and delivering tangible results
  • 2+ years of experience with associated development and documentation applications: Jira, Confluence, GitLab, Visio, and Lucid Charts
  • Experience in Core Banking Platform or Payments
  • Experience building AI solutions or using AI to enhance day-to-day productivity

Responsibilities

  • Develop and maintain front-end interfaces for web applications using modern languages and frameworks such as TypeScript and React
  • Design and implement back-end services and APIs using Golang, Docker and other relevant technologies
  • Write clean, maintainable, and efficient code; follow best practices and coding standards and conduct code reviews and provide constructive feedback to peers
  • Troubleshoot and debug issues reported by QA, partners, or clients to ensure high-quality application performance
  • Develop technical designs and collaborate cross-functionally with product managers, designers, developers, and business users to define, design, and deploy new features
  • Operate within an agile environment as an active participant in all traditional agile ceremonies and activities to deliver high-quality outputs
  • Help lead key team initiatives and mentor Junior Developers

Other

  • 6+ years of software development experience in a Technology, AI, Fintech, or SaaS organization
  • Bachelor’s degree in computer science, engineering, or a related field, or an equivalent combination of education, work or military experience
  • This role is on-site Monday through Friday.
  • The role requires being on-call less than 1 week per month
  • You must currently possess valid and unrestricted U.S. work authorization to be considered for this role. Individuals with temporary visas including, but not limited to, F-1 (OPT, CPT, STEM), H-1B, H-2, or TN, or any candidate requiring sponsorship, now or in the future, will not be considered for this role.