Junior Full-Stack Software Engineer

Flexi Software is hiring a junior full-stack engineer to build and deliver its next-generation platform for financial institutions. The role spans C# services, modern web front ends, SQL Server, AI-assisted development, and limited work on legacy Windows desktop solutions.

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Diego García Barrientos

Systems Operation Engineer

Previously@Tata Consultancy Services

from your School

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, as part of every change you ship

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, and learn to direct them effectively

Review and verify AI-generated code with care, owning correctness, security, and quality for everything you commit

Take part in code reviews, both giving and receiving feedback, to build skill and uphold team standards

Contribute to CI/CD pipelines, automated testing, and release practices so changes move to production safely and often

Build with the security, reliability, and data integrity expected of enterprise financial software, including input validation, error handling, and audit-friendly design

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 your primary focus, and learn how the new platform integrates with these existing products and our DevOps environment

Grow your skills through mentorship, pairing, and regular feedback, and share what you learn about AI-assisted development with the team

Preferred

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

Benefits

Paid holidays and paid time off

401(k) Plan with company match

Health and dental insurance

Life and disability insurance

Vision discount plan

Hybrid work arrangement (Atlanta, GA area only)

Mentorship, pairing, and regular feedback

Somos la marca mexicana líder en calzado, reconocidos internacionalmente por el confort y la calidad existente en cada uno de nuestros productos.

León, Guanajuato, MEX

https://www.flexi.com.mx

Late Stage

Recent News

EIN Presswire

The Top Financial Close Management Software According to the FeaturedCustomers Winter 2025 Customer Success Report

2025-04-01

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Qualifications

Bachelor's degree in Computer Science, Software Engineering, or a related technical field — or equivalent practical experience, such as a bootcamp, internship, or substantial project work

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, and a willingness to work in legacy C++ and C# Windows desktop code on a limited basis

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, with a clear sense of when to trust their output and when to question it

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, and the ability to ask good questions and take feedback well

AI-curious and AI-forward; you actively use AI tools in your own work, enjoy experimenting with agentic workflows, and share what works

Rigorous about quality; you treat AI output as a draft to be verified, not a result to be trusted blindly

A builder; you like turning an idea into working software and seeing it used

Eager to learn; you ask questions, seek feedback, and improve quickly

Hands-on and persistent; you stay with a hard bug until you understand the cause

Security- and detail-minded; you understand that accuracy and data integrity matter in financial software

Collaborative and low ego; you work well with engineers, QA, and Product

High integrity and sound judgment; trusted with sensitive customer and product information

Positive attitude and sense of humor; work is way more fun with people you enjoy!

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

Required skills

C#, .NET, JavaScript/TypeScript, HTML and CSS, React, Node.js, Next.js, Microsoft SQL Server, REST APIs, Git, Unit Testing, Claude Code, Cursor, and Codex

Preferred skills

Exposure to AWS or Azure cloud platforms

Experience

Entry level