Principal Full Stack Software Engineer

Fidelity Investments

Principal Full Stack Engineer responsible for designing and delivering modern web applications for Fidelity. Collaborate with teams to implement CI/CD processes and mentor developers.

Posted 6/10/2026full-timeSalem • New Hampshire, North Carolina • 🇺🇸 United StatesLeadWebsite

Tech Stack

Tools & technologies

AzureCloudJavaScript.NETNode.jsPythonReactTypeScript

About the role

Key responsibilities & impact

Design and deliver modern web applications and the automation pipelines that ship them
Gain understanding of all the components of the technology stack including Azure, databases, and related enterprise platforms
Work closely with team members to deliver solutions
Bridge traditional application development with modern platform-based solutions
Take ownership of designing and implementing CI/CD processes
Provide guidance and mentoring to other Developers

Requirements

What you’ll need

8+ years of experience in full stack software engineering
BS/BA Degree or equivalent experience required
Strong hands-on experience developing and maintaining web applications using React (frontend) and Python (backend)
Demonstrated experience in communicating technical needs and capabilities to non-technical team members, product owners, and partners
Shown leadership skills in driving the workforce and guiding/mentoring junior developers
Experience collaborating in a team environment to develop, deploy, and support key applications and features
A proven understanding of the Agile software development methodology
Extensive experience decomposing sophisticated business problems into creative, efficient, and scalable solutions
Relevant knowledge of modern application architecture patterns and emerging technologies
Proficiency with server-side/mid-tier languages, frameworks, libraries, and related technologies: Python, .NET, .NET MVC and microsoft frameworks
Client-side language, library, and framework proficiency: React a plus, JavaScript/TypeScript, Node, NPM, HTML/CSS, SPFx
Solid understanding of CI/CD concepts and tools, including build pipelines, automation, and version control
Demonstrated ability to establish and manage CI/CD pipelines for both traditional applications (React/Python)
Experience collaborating with cross-functional teams working on Azure, Microsoft Fabric, and related cloud services
Proven ability to create automation scripts and tooling to streamline deployments and workflows
Experience defining best practices for version control, release management, and DevOps in hybrid environments
Demonstrated experience communicating technical needs and capabilities to both technical and non-technical team members
Comfort working across both traditional codebases and platform-based solutions.

Benefits

Comp & perks

Health insurance
Paid time off
Professional development opportunities
Flexible work arrangements

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

full stack software engineeringReactPython.NET.NET MVCJavaScriptTypeScriptNodeHTMLCSS

Soft Skills

leadershipmentoringcommunicationcollaborationproblem-solvingguidance

Certifications

BS/BA Degree