Full Stack Developer (.NET)

Quantum Technologies LLC; Fremont (CA); On-site; USD 90,000 - 130,000; Full time

Job summary

Quantum Technologies. LLC is seeking a skilled Full Stack Developer to join our development team in Fremont, CA.

You will build scalable web applications using ASP.NET Core, C#, and front-end frameworks like React or Angular, and design robust RESTful APIs with MySQL databases. You will collaborate across product, QA, and analytics teams, troubleshoot issues, and contribute to architecture while exploring AI-enabled capabilities.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 3–6 years of experience in full-stack application development.
• Strong hands-on experience with C#, ASP.NET Core, and RESTful API development.
• Experience designing and working with MySQL databases, including query optimization.
• Strong understanding of object-oriented programming principles, SOLID principles, and software design patterns.
• Experience with version control systems such as Git.
• Familiarity with Agile/Scrum development methodologies.
• Basic knowledge of AI integration, AI APIs, or LLM-based application features is an added advantage.

Responsibilities

• Design, develop, and maintain full-stack web applications using ASP.NET Core, C#, and React or Angular.
• Develop robust, secure, and scalable RESTful APIs and backend services.
• Design, optimize, and manage MySQL databases, including writing efficient queries and stored procedures where required.
• Collaborate with product owners, business analysts, QA engineers, and other developers throughout the software development lifecycle.
• Troubleshoot, debug, and resolve application issues to ensure optimal performance, security, and reliability.
• Participate in code reviews and ensure adherence to coding standards, software design principles, and development best practices.
• Contribute to application architecture, technical design, and continuous improvement initiatives.
• Explore and integrate AI-powered capabilities into applications using AI APIs, large language models (LLMs), or other AI services, where applicable.
• Maintain technical documentation for developed features, APIs, and application solutions.

Skills

Full-stack development

Analytical skills

Teamwork

Education

Bachelor's degree in Computer Science/IT or related field

Tools

C#

ASP.NET Core

React

Angular

MySQL

RESTful APIs

Git

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Work Authorization:US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description:

We are seeking a skilled and motivated Full Stack Developer to join our development team. The ideal candidate will have hands‑on experience building scalable web applications using Microsoft technologies and modern front‑end frameworks such as React or Angular. You will be responsible for designing, developing, testing, and maintaining high‑quality software solutions while collaborating with cross‑functional teams to deliver business requirements. Familiarity with AI‑powered solutions or AI integration into web applications is an added advantage.

Key Responsibilities:

• Design, develop, and maintain full‑stack web applications using ASP.NET Core, C#, and React or Angular.
• Develop robust, secure, and scalable RESTful APIs and backend services.
• Design, optimize, and manage MySQL databases, including writing efficient queries and stored procedures where required.
• Collaborate with product owners, business analysts, QA engineers, and other developers throughout the software development lifecycle.
• Troubleshoot, debug, and resolve application issues to ensure optimal performance, security, and reliability.
• Participate in code reviews and ensure adherence to coding standards, software design principles, and development best practices.
• Contribute to application architecture, technical design, and continuous improvement initiatives.
• Explore and integrate AI‑powered capabilities into applications using AI APIs, large language models (LLMs), or other AI services, where applicable.
• Maintain technical documentation for developed features, APIs, and application solutions.

Preferred Qualifications:

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 3–6 years of experience in full‑stack application development.
• Strong hands‑on experience with C#, ASP.NET Core, and RESTful API development.
• Experience designing and working with MySQL databases, including query optimization.
• Strong understanding of object-oriented programming principles, SOLID principles, and software design patterns.
• Experience with version control systems such as Git.
• Familiarity with Agile/Scrum development methodologies.
• Basic knowledge of AI integration, AI APIs, or LLM‑based application features is an added advantage.
• Strong analytical, problem‑solving, and debugging skills.
• Excellent communication, collaboration, and teamwork skills.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.