Top 51 Senior full stack Jobs in O'fallon, Mo

Full Stack Senior Developer C#/ASP.Net/React
Centerprism —St. Louis, MO
- $79,619 - $109,886 a year
- Part-time
- Hybrid work
- Azure
- Java
- AWS
- AD&D insurance
- Health insurance
Quick Apply
Sr. Full Stack Developer
World Wide Technology Holding, LLC —St. Louis, MO
- $106,400 - $133,000 a year
- Full-time
- Remote
- Computer science
- Computer Science
- 8 years
- Profit sharing
- Wellness program
Senior Developer
Centerprism —St. Louis, MO
- $88,470.44 - $106,545.04 a year
- Part-time
- Azure
- System design
- Office
- Relocation assistance
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13d
Senior Software Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Azure
- System design
- AWS
- Paid jury duty
- Health savings account
Senior Developer, Full Stack - Contract
World Wide Technology Holding, LLC —St. Louis, MO
- $51 - $64 an hour
- Contract
- Computer science
- Azure
- Computer Science
Senior Software Engineer
Eastman Chemical Company —St. Louis, MO
- Azure
- 5 years
- Office
Senior Software Engineer - Java Full Stack Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Computer science
- 7 years
- Computer Science
- Paid jury duty
- Health savings account
Full Stack Software Developer (.NET/React)
Copeland —St. Louis, MO
- Full-time
- Hybrid work
- Azure
- Mid-level
- Residential
- Paid parental leave
- Paid holidays
13d
Senior AI/ML Developer (Full-Stack)
Peraton —Pacific, MO
- $86,000 - $138,000 a year
- Azure
- Computer Science
- 5 years
- Health savings account
- Paid holidays
Sr AI Context Engineer
GEHA —Missouri
- $124,666 - $157,710 a year
- Full-time
- Azure
- HIPAA
- SQL
- AD&D insurance
- Disability insurance
8d
Senior Construction Manager - Building
Crusoe —Warrenton, MO
- $160,875 - $195,000 a year
- Full-time
- Civil engineering
- 7 years
- Construction site
- Commuter assistance
- Paid parental leave
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Senior Construction Manager
Crusoe —Warrenton, MO
- $160,875 - $195,000 a year
- Full-time
- Civil engineering
- 7 years
- Construction site
- Commuter assistance
- Paid parental leave
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Senior Developer
Grimco —Sunset Hills, MO
- Online Application
- Remote
- Azure
- 5 years
- AWS
- Profit sharing
- Paid parental leave
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Senior Construction Project Specialist
Crusoe —Warrenton, MO
- $111,375 - $135,000 a year
- Full-time
- Construction site
- Mid-level
- Organizational skills
- Commuter assistance
- Paid parental leave
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Senior Software Engineer– RPPS Platform
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- System design
- Databases
- Mentoring
- Paid jury duty
- Health savings account
Sr. Software Engineer
bioMérieux —Hazelwood, MO
- $82,000 - $115,000 a year
- Hybrid work
- Computer science
- 7 years
- Microsoft Outlook
- Commuter assistance
- Disability insurance
Solution Consultant- Internal Program Management (St. Louis, MO)
World Wide Technology Holding, LLC —St. Louis, MO
- $126,000 - $158,000 a year
- Full-time
- Remote
- 7 years
- Public speaking
- Bachelor's degree
- Profit sharing
- Wellness program
Senior Technical Program Manager
Mastercard —O'Fallon, MO
- $96,000 - $163,000 a year
- Online Application
- Computer science
- Computer Science
- Organizational skills
- Paid jury duty
- Health savings account
13d
BackEnd Software Engineer (Experienced or Senior)
Boeing —Berkeley, MO
- $126,650 - $217,350 a year
- Computer science
- Computer Science
- 5 years
- Health savings account
- Disability insurance
Java Engineer
J2B Global LLC —O'Fallon, MO
- $50 - $60 an hour
- Full-time
- Azure
- Office
- 8 years
- Employee assistance program
- Employee discount
Quick Apply

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senior full stack jobs near o'fallon, mo

Full Stack Senior Developer C#/ASP.Net/React

Centerprism -
St. Louis, MO

Quick Apply

Job Details

Part-time | Full-time | Contract | Internship
$79,619 - $109,886 a year

Benefits

AD&D insurance
Health insurance
Dental insurance
Vision insurance
Life insurance

Qualifications

ASP.NET
Software engineering
MVC
Bug Tracking (Quality assurance practices)
Engineering development testing
Bug Reporting (Quality assurance practices)
JavaScript frameworks
Microservices
System design for system development
Issue tracking
Version control systems
Web applications
Agile software development
Application Maintenance
Design (software development lifecycle)
Agile planning
Web services design
Database software proficiency

Full Job Description

Job Overview

We are seeking a dynamic and highly skilled Full Stack Senior Developer specializing in C# and web development to join our innovative technology team. In this role, you will lead the design, development, and deployment of scalable, high-performance software solutions. You will work across the full technology stack, collaborating with cross-functional teams to create robust applications that meet evolving business needs. Your expertise will drive system architecture decisions, optimize existing platforms, and implement cutting-edge features using a variety of programming languages and frameworks. This is an exciting opportunity to influence the future of our digital infrastructure while working in a fast-paced, agile environment that values innovation and continuous improvement.

Responsibilities

Lead the development of full-stack applications utilizing C#,.NET framework, React, and modern JavaScript frameworks such as React or Angular to deliver seamless user experiences.
Design and implement RESTful APIs and microservices architectures to ensure system scalability, reliability, and maintainability.
Collaborate with product owners and stakeholders to gather requirements and translate them into technical specifications aligned with best practices in software engineering.
Develop scalable systems by applying design patterns, system design principles, and cloud infrastructure solutions such as AWS or Azure.
Maintain version control using tools like GitHub or SVN, and implement CI/CD pipelines for automated testing and deployment.
Optimize application performance by analyzing system bottlenecks, refining codebases, and ensuring adherence to security standards such as RBAC (Role-Based Access Control).
Contribute to agile software development processes through regular sprint planning, stand-ups, code reviews, and documentation.

Qualifications

Minimum 5 years of C#/.NET full‑stack development

· Expert‑level proficiency in C#, ASP.NET, MVC, and SQL Server

· Strong understanding of SOLID principles and modern software engineering practices

· Skilled in debugging, testing, maintenance, and bug tracking

· Ability to thrive in a highly agile, collaborative environment

· Excellent written and verbal communication skillsProven experience in software development with a strong focus on web development using C#,.NET technologies, JavaScript frameworks (React, Angular), and RESTful API design.

Extensive knowledge of IT infrastructure including cloud services (AWS, Azure), Linux environments, and database management systems such as MySQL or SQL Server.
Solid understanding of system design for scalable systems employing microservices architecture, design patterns, and APIs.
Hands-on experience with version control systems like Git or SVN along with CI/CD tools for automated deployment workflows.
Familiarity with Agile software development methodologies including Scrum or Kanban to facilitate iterative project delivery.
Strong programming skills across languages such as Python, Java, C++, C#, VBA or C are highly desirable for supporting diverse application needs.
Ability to work effectively in a collaborative environment while managing multiple priorities in a fast-paced setting.

Join us as we push the boundaries of technology innovation! We are committed to fostering an inclusive culture that values continuous learning and professional growth. If you’re passionate about building impactful software solutions with cutting-edge tools and methodologies—this is your chance to make a difference!

Family‑first culture, zero bureaucracy, tight‑knit team, real ownership, and constant recognition — a place where your work truly matters.

Pay: $79,619.00 - $109,886.00 per year

Benefits:

AD&D insurance
Dental insurance
Health insurance
Life insurance
Vision insurance

Work Location: Hybrid remote in St. Louis, MO 63141

Quick Apply

Refine Your Search

senior full stack jobs in o'fallon, mo

Full Stack Senior Developer C#/ASP.Net/React

Sr. Full Stack Developer

Senior Developer

Senior Software Engineer

Senior Developer, Full Stack - Contract

Senior Software Engineer

Senior Software Engineer - Java Full Stack Engineer

Full Stack Software Developer (.NET/React)

Senior AI/ML Developer (Full-Stack)

Sr AI Context Engineer

Senior Construction Manager - Building

Senior Construction Manager

Senior Developer

Senior Construction Project Specialist

Senior Software Engineer– RPPS Platform

Sr. Software Engineer

Solution Consultant- Internal Program Management (St. Louis, MO)

Senior Technical Program Manager

BackEnd Software Engineer (Experienced or Senior)

Java Engineer

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