Top Software Engineer Jobs in St. Louis, MO

Design and implement scalable backend services, APIs, and geoprocessing workflows for ArcGIS Enterprise. Build connectors, ingestion pipelines, and containerized tooling; support cloud-native and on-prem deployments, observability, and integrations to deliver reliable geospatial backend systems for mission-critical defense and intelligence applications.

Design, implement, and maintain scalable, secure geospatial database platforms supporting mission-critical Defense and Intelligence systems. Responsibilities include database design, performance tuning, high-availability and disaster recovery, automation, data security, and customer-facing technical guidance across implementation lifecycle.

Leads developers in designing, developing, modifying, testing, documenting, and maintaining COBOL and SCOBOL applications. Coordinates project schedules, estimates costs, tracks progress, ensures coding standards, communicates with project requestors, mentors programmers, and resolves operational issues. The role requires developing complex online and batch programs and improving programming processes and techniques.

Maintain, enhance, and support enterprise applications on IBM i (AS/400) using RPGLE. Lead modernization efforts (VS Code, Code for IBM i, Git/GitHub), develop database solutions (MS-Access, OpenEdge Progress), build Visual Basic integrations, perform Linux system administration, troubleshoot issues, gather requirements from business users, and document technical specifications.

Design and develop scalable applications, collaborate across teams, troubleshoot issues, and utilize modern development practices in cloud environments. Requires extensive software engineering experience, particularly in Java and cloud technologies.

The C# Developer will design, develop, and support IT solutions using various technologies, ensuring feasibility and leading project initiatives during the software development life cycle.

Analyze user requirements, develop specifications, design and develop software, resolve issues, provide consultation, ensure code quality, and mentor team members.

The Junior C# Developer will assist in developing system designs, coding, testing, and documenting programs under supervision, while suggesting process improvements.

We are seeking .NET Developers with a minimum of 3 years of experience in VB.NET, C#, and SQL, familiar with ASP.NET and front-end tools like HTML, CSS, and JavaScript for long-term contracts.

The job requires developing and maintaining data systems for Special Education, including database systems and assisting in application development to improve access to education-related data.

Seeking a Senior Web Engineer to develop custom web and mobile applications, collaborate with UX designers, and solve technical problems. Must have a passion for coding and continuous learning.

Develop WordPress themes from PSDs, ensuring high usability and intuitive design. Collaborate effectively and communicate proactively with the team.

The PeopleSoft Developer will design, develop, implement, and support PeopleSoft applications, requiring experience in PeopleTools, SQL, and a strong understanding of ERP solutions.

Develop and maintain custom enterprise web applications, design front-end solutions using Angular, and support AWS environments while ensuring system performance and customer satisfaction.

The Mongo Database Engineer will design and implement database solutions, enhance security, lead automation processes, and optimize database structures, contributing to national security initiatives.

Develop and manage data collection infrastructure for AI model training, utilizing cloud services and collaborating with scientists to enhance data quality and processing.

Lead development of Windows desktop applications, define best practices, ensure accessibility, collaborate on features, and maintain quality across releases.

Designs, develops, and optimizes Oracle Utilities batch processes supporting billing, metering, data conversion, and integrations. Builds shell-script automation for scheduling, monitoring, and recovery; collaborates with functional and architecture teams; documents dependencies and runbooks; leads SIT and UAT; troubleshoots failures; tunes performance; and manages batch sequencing during cutovers and production deployments.