Full Time Junior Full Stack Software Developer Jobs in St Louis, MO

The position requires a government security clearance. Candidates must be U.S. citizens and eligible for work without a visa sponsorship.

We are seeking a Full Stack Developer with a strong database background to join our engineering team supporting mission-critical enterprise applications and cloud modernization efforts. This role combines hands-on software development with database migration, backend integration, and cloud-hosted application support.

The ideal candidate has experience developing full-stack or backend application components while also supporting relational database design, migration, validation, and performance tuning. This position will support the completion of Oracle-to-PostgreSQL migration activities in AWS environments, then will continue to maintain and tune the databases in the cloud.

This role will spend up to half time on database tasking and the remainder in a full-stack software development role. The successful candidate should be comfortable working across application code, APIs, SQL, database objects, cloud-hosted services, and automated deployment workflows.

What you will do

• Database Development, Migration, and Modernization
• •  Manage schema conversion, object validation, and post-migration reconciliation across multiple Oracle database schemas.
  • Support AWS DMS configuration, monitoring, and troubleshooting, including task validation, CDC synchronization, LOB handling, endpoint verification, and migration performance tuning.
  • Conduct migration validation activities including row count comparisons, object count verification, CDC testing, referential integrity checks, and application smoke testing.
  • Develop and execute SQL and shell automation scripts for schema exports, row count validation, object comparison, and migration verification using SQL*Plus, Bash, PostgreSQL utilities, Oracle metadata utilities, and related tools.
  • Create automated workflows for identifying missing database objects and generating DDL scripts to remediate inconsistencies between source and target environments.
  • Coordinate migration cutover activities and work cross-functionally with cloud engineers, developers, database administrators, and program stakeholders to ensure successful deployment and operational continuity.
  • Author migration procedures, validation checklists, turnover materials, and operational documentation to support sustainment and knowledge transfer.
• Full Stack and Backend Software Development
• • Design, develop, test, and maintain software solutions using modern full-stack development practices.
  • Build and enhance backend services, APIs, and application components that integrate with relational databases and cloud-hosted services.
  • Develop application logic in languages such as Java, JavaScript, TypeScript, or React technologies (you should be an expert in at least one and familiar with the others).
  • Collaborate with technical leads, architects, database engineers, cloud engineers, and program stakeholders to deliver reliable software solutions.
  • Participate in iterative software development activities, including requirements analysis, design, implementation, testing, debugging, code reviews, and deployment support.
  • Troubleshoot and optimize application performance, scalability, reliability, and database interaction patterns.
  • Support application modernization efforts involving microservices, cloud-hosted services, database integration, and data access layer improvements.
  • Assist with application smoke testing, integration testing, and production readiness activities during migration and deployment events.
• Cloud, CI/CD, and DevOps Support
• • Contribute to CI/CD pipeline activities that support application and database deployments
  • Work with cloud and DevOps engineers to support secure, repeatable deployments across development, test, staging, and production environments.
  • Assist with infrastructure-as-code and environment configuration activities related to application/database connectivity, permissions, and deployment automation. 

You should have experience with

• 4+ years of professional experience in software engineering, full-stack development, backend development, database development, or a closely related technical role.
• Experience developing software in one or more modern programming languages such as Java, JavaScript, TypeScript, React, or similar.
• Experience developing backend services, APIs, data access layers, or application components that interact with relational databases.
• SQL, relational database design, schema development, and database object management.
• Developing DDL scripts, migration scripts, validation scripts, and database automation scripts.
• Hands-on experience with PostgreSQL, preferably hosted in AWS RDS.
• Familiarity with AWS Database Migration Service and Oracle
• Familiarity with CI/CD pipelines, Git, Bash, and other DevSecOps tools
• Agile software development methodology and team practices
• Strong troubleshooting skills and the ability to analyze schema, data, migration, and deployment issues across environments.

What we like to see

• Passionate about full-stack development and database development
• Flexible and adaptable when requirements change or priorities change
• Enthusiastic about adopting DevSecOps practices
• Thrives when collaborating within a small, cross-functional team
• Proactive communicator who knows when to ask for help when blocked

Requirements

• 4+ years of professional experience in software engineering, DevOps, or database administration.
• Security+ certification (or willingness to obtain one)
• Bachelor’s Degree in Computer Science, Engineering, or related field

We are a team of driven professionals, committed to creating cutting edge web applications that will positively impact our client's business. Our clients range from start-ups to large government customers. We work hard to deliver web apps with features our customers need to run their business. What we value most are the kind of skills you can't learn in school. We value versatility, autonomy, and an attitude that accepts challenges with open arms.