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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Full Stack Engineer - **Company:** Fmr LLC - **Location:** Durham, NC, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), A/B Testing, Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Server Applications, Automation of Tests, Microsoft Azure, Continuous Integration, DevOps, Distributed Systems, Java Platform Enterprise Edition (J2EE), Github, Java Web Services, Spring Framework, JSON, Junit, Apache Maven, Node.Js, NoSQL, Open Source Technology, Performance Tuning, Mockito, Swagger, Software Engineering, Management of Software Versions, Web Services, Openapi, Cloud Platform System, Spring-mvc, Express.js, Spring-boot, Backend, Information Technology, Npm(Software), Api Design, Restful APIs, Api Management, Docker, Jenkins, Microservices - **Published:** October 22, 2026 - **Apply:** https://www.themuse.com/jobs/fidelityinvestments/principal-full-stack-engineer-9dd9ac ## About the Role * 8+ years of hands on software development experience in Java Web services and API solutions. * Leadership & Strong execution skills in a fast-paced environment using agile methodologies. * Capability to support mission critical customer facing platforms and applications. * Strong experience designing and building scalable Service-Oriented and Microservices Architectures, including RESTful APIs, JSON-based services, and modern application servers. * Proficient in Java, J2EE, Spring MVC, Spring Core, Node and JavaScript. * Deep expertise in API development, including API contract definition, versioning, isolation strategies, and service decomposition. * Strong understanding of distributed systems, performance optimization, and building highly scalable backend platforms using open-source technologies. * Experience with cloud computing platforms, particularly AWS or Azure, including deployment, monitoring, and infrastructure services. * Proficient in API documentation frameworks such as OpenAPI / Swagger. * Strong DevOps experience, including CI/CD pipelines and tools such as Jenkins, Maven, GitHub, NPM, and automated build/deployment processes. * Solid knowledge of containerization and orchestration technologies, including Docker and Kubernetes. * Experience with backend testing frameworks, such as JUnit, Mockito, Spring Test, or equivalent backend testing tools. * Familiarity with backend frameworks, including, Micronaut, Spring Boot, ExpressJS (for Node.js), or similar server-side technologies. * Proficient in working with both relational and NoSQL databases, including schema design, optimization, and data modeling. * Experience working in Agile environments. * Excellent collaboration and communication skills, especially for partnering with global cross-functional teams. * Demonstrated ability to mentor junior engineers and contribute to strong engineering culture and best practices., * Bachelor's or equivalent degree with a Computer Science background. * 8+ years of relevant experience ## Description Are you interested in serving the needs of millions of customers by building best-in-class API capabilities which help deliver experiences in financial planning, investing, and retirement? Our Personal Cards team is looking for solution-based engineers with a passion for developing easy-to-use, customer focused APIs and capabilities which power Fidelity's web and mobile experience platforms. The Purpose of Your Role Our teams build APIs and Digital capabilities that support Fidelity's large scale digital presence. You will help us design and develop re-usable APIs that focus on customer experience needs and optimize quality and deployment practices. You'll contribute to the entire development lifecycle from concept to deployment as a member of an agile, cross-functional team. You will have the opportunity to share your technical knowledge to help strengthen our engineering community and further pursue your own learning of new technologies and platforms. We're looking for software engineers that enjoy a collaborative environment and have a passion for releasing high quality software through iterative software development practices. The Expertise we're Looking For * You have a passion for technology and can navigate your way across complex and rapidly-changing landscapes by staying on top of latest trends and thrive by sharing knowledge. * Are a creator, a doer, and a disruptor who will help us solve real-life problems and meet real customer needs. You'll be helping us build things, taking an idea, and creating rapid prototypes that are shippable and learn from real-life feedback. * Are comfortable to be a self-starter, who actively challenges status-quo, is curious and not afraid to ask "Why" and "What if"? * Care about cycle time and use CI/CD practices, tools to rapidly deploy changes to customers while minimizing risk using practices like A/B tests, blue-green deployments, and feature toggles * Design and architect complex solutions on a platform dedicated to high scale processing of large amounts of data * Mentor and direct team members on technology and specific design; Own issues and provide end-to-end solutions * Collaborate with business and technology stakeholders to define and deliver our next generation ecosystem. * Partner with various teams to assist on moving towards a completely automated testing and deployment. * Continuously evaluate and prototype emerging technologies within developer & test community to understand business value and feasibility. * Help the organization into moving towards an engineering product model based team structure. * Digital mindset, and fluent across technology components including API Services development and consumption using modern frameworks and open source technologies. * Have strong communication skills and technical expertise to drive and participate in meaningful discussions.