Junior Full-Stack Software Engineer

About the Role

Flexi Software is hiring Junior Full-Stack Software Engineers to help build the next generation of our platform. You will work across C# services and modern web front ends built with Node.js, React, and Next.js, backed by Microsoft SQL Server. This role is a strong starting point for an early-career engineer who wants to grow quickly, learn from experienced engineers, and ship real software at scale. This is a hybrid position, working in person with the team in our Atlanta, GA office.

Key Responsibilities

• Build, test, and deliver full-stack features for Flexi's next-generation platform, working across C# back-end services and APIs and Node.js, React, and Next.js front ends.
• Write clean, maintainable, well-tested code, including unit and integration tests.
• Work with Microsoft SQL Server: write queries and stored procedures, design tables, and learn to tune for application and database performance.
• Use AI coding assistants and agentic workflows daily across design, coding, code review, testing, and documentation.
• Review and verify AI-generated code, owning correctness, security, and quality.
• Take part in code reviews, both giving and receiving feedback.
• Contribute to CI/CD pipelines, automated testing, and release practices.
• Build with security, reliability, and data integrity for enterprise financial software.
• Investigate and resolve defects, tracing issues across the front end, services, and database.
• Write and maintain technical documentation, including API documentation and developer notes.
• Partner with Product, QA, and senior engineers to turn requirements into shipped customer-facing software.
• Contribute on a limited basis to Flexi's legacy Windows desktop solutions in C++ and C#, while next-generation web platform delivery remains the primary focus.
• Grow skills through mentorship, pairing, and regular feedback, and share learnings about AI-assisted development.

Requirements & Tech Stack

• C# and the .NET platform
• JavaScript or TypeScript, HTML, and CSS
• React
• Node.js and Next.js
• Relational databases and SQL
• Microsoft SQL Server (preferred)
• REST APIs
• Git
• AI coding assistants and agentic tools
• Software testing fundamentals, including unit tests
• CI/CD pipelines (familiarity preferred)
• AWS or Azure cloud platforms (exposure preferred)
• Secure coding practices, including OWASP guidance (interest or exposure preferred)

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related technical field — or equivalent practical experience.
• 0–3 years of professional software development experience; internships and strong personal or academic projects count.
• Working knowledge of C# and the .NET platform, including object-oriented programming fundamentals.
• Working knowledge of JavaScript or TypeScript, HTML, and CSS, with hands-on experience building applications in React.
• Experience or coursework with Node.js and Next.js, including routing, server-side rendering, and API routes.
• Working knowledge of relational databases and SQL, with exposure to Microsoft SQL Server preferred.
• Familiarity with building and consuming REST APIs.
• Experience with Git and a collaborative, pull-request-based workflow.
• Active, hands-on use of AI coding assistants and agentic tools in your own work.
• A solid grasp of software testing fundamentals, including writing unit tests.
• Strong problem-solving skills and attention to detail.
• Clear written and verbal communication skills.

Preferred Qualifications

• Experience with ASP.NET Core, Entity Framework, or Web API development.
• Experience with Vite, modern build tooling, and component libraries or design systems.
• Experience delivering web applications in a B2B software environment using modern AI-accelerated tools such as Claude Code, Cursor, and Codex, including prompt and context engineering for coding tasks.
• Exposure to automated testing frameworks such as xUnit, NUnit, Jest, Playwright, or Cypress.
• Familiarity with CI/CD pipelines, such as Azure DevOps or GitHub Actions, and containerization.
• Exposure to AWS or Azure cloud platforms.
• Interest in or exposure to secure coding practices, including OWASP guidance.
• Experience with ERP, accounting, financial, or other enterprise systems of record, especially B2B enterprise software, and prior experience in the financial services industry or financial accounting.

Personal Characteristics

• AI-curious and AI-forward: Actively use AI tools, enjoy experimenting with agentic workflows, and share learnings.
• Rigorous about quality: Treat AI output as a draft to be verified.
• A builder: Enjoy turning ideas into working software.
• Eager to learn: Ask questions, seek feedback, and improve quickly.
• Hands-on and persistent: Stay with hard bugs until understood.
• Security- and detail-minded: Understand accuracy and data integrity matter.
• Collaborative and low ego: Work well with engineers, QA, and Product.
• High integrity and sound judgment.
• Positive attitude and sense of humor.

Location

• Hybrid: Atlanta, GA area only.