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Sr Software Developer - API Integration
Creve Coeur or St. Louis
$110k-$130k/yr HybridFull Time
5+ YOE5+ years software development experience; hands-on Power Apps/Power Automate and Power Platform, REST/JSON API integration, Microsoft Azure, CI/CD and DevOps, Dataverse, Infrastructure as Code, and data mapping; knowledge of data privacy.
Microsoft Power Platform, Power Apps, Power Automate, Dataverse, Microsoft Azure, RESTful APIs, JSON, CI/CD, DevOps, Infrastructure as Code, ServiceNow, RPA, Microsoft SharePoint
1mo
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Systems Integration Engineer (Experienced or Lead)
Hazelwood or Saint Charles or Berkeley
$112k-$185k/yr OnsiteFull Time
Bachelor's in engineering or related field, systems engineering/integration experience, hardware/software integration experience, familiarity with Windows/Linux and scripting, active U.S. Secret security clearance and U.S. citizenship required.
Windows, Linux, BIOS, File Servers, Network Switch, Scripting
1mo
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Systems Integration Engineer (Experienced or Lead)
Hazelwood or Saint Charles or Berkeley
$112k-$185k/yr OnsiteFull Time
Bachelor's in a STEM field, systems engineering and system-integration experience, familiarity with hardware/software integration, operating systems (Windows/Linux), scripting, and ability to support buildup, integration, testing and troubleshooting. Active U.S. Secret clearance and U.S. citizenship required.
Windows, Linux, BIOS, File Servers, Scripting
1mo
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Systems Integration Testing Engineer
St Louis, Missouri, United States
$112k-$179k/yr OnsiteFull Time
6+ YOEMust hold Top Secret clearance and be willing to upgrade to TS/SCI with polygraph. BS in systems/electrical/physics/software engineering (or related) with 8 years' systems engineering experience (6 years with Master's). Experience in sensor imaging systems, test design, data verification, and strong written/oral communication required.
2w
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Lead Software Engineer
O'Fallon, Missouri, United States
HybridContract
Bachelor's in CS/IS, strong full-stack Java, API, Angular, React skills; experience with Agentic frameworks, MCP and LLM integrations; Qlik Sense and data architecture experience; strong analytical and communication skills.
Java, APIs, Angular, React, Agentic Frameworks, MCP, LLMs, Qlik Sense, Tableau, Power BI, WebFocus, Hadoop, Kafka
3mo
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Software Engineer II
O'Fallon, Missouri, United States
$92k-$147k/yr OnsiteFull Time
Experience building applications with Power Apps; strong JS/HTML, API integrations, SQL, and Azure knowledge.
Power Apps, Power Automate, Dataverse, SharePoint, Excel, SQL, APIs, JavaScript, HTML, Azure, Git
3mo
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Customer Onboarding and Integration Engineer
St. Louis, Missouri, United States
OnsiteFull Time
3+ YOEActive TS/SCI clearance; 3–7 years software development, system integration, or technical support; customer-facing; strong communication; Agile; GitLab or similar collaboration tools.
Linux, APIs, AWS, CI/CD, GitLab CI/CD, Containerization, Serverless, Data mapping, Data transfer, Dashboards, IAM
3mo
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Senior Software Engineer-Oracle EPM
St Louis, Missouri, United States
$105k-$204k/yr HybridFull Time
5+ YOEBachelor’s degree plus 5+ years relevant experience; hands-on Oracle EPM and cloud integrations; senior functional knowledge in DRM/EDMCS, Hyperion, and API-based integrations.
Oracle EPM, DRM/EDMCS, Oracle Cloud EPM, EPCM, Hyperion, MuleSoft, ODI, FDMEE, SmartView, Financial Reporting Studio, API development
1mo
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Senior Software Engineer - GoLang and Python
St. Louis or Missouri or Minnesota or Nebraska or Kansas or Iowa
$88k-$157k/yr OnsiteFull Time
Extensive experience with Python and Go, API design (REST,gRPC), GKE/GCP, microservices, CI/CD, DevOps, IaC (Terraform), SQL, Git, observability, messaging (Kafka, Pub/Sub), and integrating AI/MCP into systems.
Python, GoLang, REST, gRPC, Google Kubernetes Engine, Google Cloud Platform, Model Context Protocol (MCP), Datadog, OpenTelemetry, SQL, Git, GitHub, GitLab, Terraform, Apache Kafka, Google Pubsub, AWS SNS/SQS, Istio
1mo
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Software Development Engineer II- Back End
Redlands or St. Louis or Vienna
$97k-$162k/yr OnsiteFull Time
2+ YOE2+ years backend engineering experience building services with Python, Node.js/JavaScript, or Java; REST API design; ArcGIS Enterprise integration; containerization (Docker/Kubernetes); Top Secret/SCI clearance required; Bachelor's degree in CS/Math/GIS/STEM.
Python, Node.js, JavaScript, Java, ArcGIS Enterprise, ArcGIS Enterprise SDKs, Docker, Kubernetes, Azure, AWS, GCP, PostgreSQL, PostGIS, SQL Server, REST APIs
2w
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Mid Software Engineer (SFA)
Saint Louis, Missouri, United States
OnsiteFull Time
5+ YOE5-7 years software development experience; proficiency in Python/Java/C#/Javascript; experience translating requirements, design, testing, deployment, database design, code reviews, and system integration. Active TS/SCI clearance and US citizenship required.
Python, Java, C#, Javascript
1w
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Full Stack Software Developer (.NET/React)
St. Louis, Missouri, United States
HybridFull Time
3+ YOE3+ years .NET experience, Next.js/React front-end, Optimizely CMS and headless CMS integration, GraphQL/REST APIs, Azure CI/CD and DevOps, Git, CSS/SCSS, JavaScript/TypeScript, strong problem-solving and collaboration skills.
Optimizely CMS, Next.js, React, GraphQL, REST, SSR, SSG, ISR, Jira, Azure DevOps Boards, Azure CI/CD pipelines, Git, CSS, Sass, SCSS, JavaScript, TypeScript, Optimizely Graph, Aprimo DAM, Cloudflare CDN, Google Analytics
2d
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Missions Systems Software Engineer - Embedded (Associate, Experienced, Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
2+ YOE2+ years programming experience (Go, Java, C, C++, Rust, or Python); systems integration experience; strong verbal and written skills; ability to obtain U.S. security clearance.
Go, Java, C, C++, Rust, Python, Linux, VxWorks, Containers, Git, CI/CD, Cameo
2mo
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Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Extensive experience building frontend architecture and design systems; React/Next.js web, React Native/Expo mobile; UI/UX optimization; scalable deployments; AI/SEO integration.
React, Next.js, React Native, Expo, Tailwind CSS, LaunchDarkly, New Relic, Mixpanel, Mux, Cloudflare Pages, Vercel, AWS Amplify, ECS, Fargate, EC2, S3, CloudFront, AI/SEO tooling
1w
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Director - Software/ AI Native Engineer
St. Louis, Missouri, United States
$175k-$180k/yr OnsiteFull Time
8+ YOEBachelor's degree required, 8+ years experience building cloud-native, microservices, DevOps/platform engineering with AWS; experience with AI-assisted development, LLM/agent integrations, and AI governance.
GitHub Copilot, Claude Code CLI, Model Context Protocol (MCP), AI Foundry, Bedrock, OpenAI, Anthropic, AWS
1mo
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Senior Developer
Sunset Hills, Missouri, United States
RemoteFull Time
5+ YOE5+ years professional software development, strong SQL and relational DB skills, experience building system integrations (APIs/EDI), ability to work with legacy code, clear communication, and security awareness.
SQL, RPG, IBM i, IBM Power Systems, EDI, X12, REST, JSON, APIs, ERP, Microsoft Azure, AWS
1w
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STARLIMS Developer
St. Louis, Missouri, United States
RemoteFull Time
4+ YOE4+ years STARLIMS configuration, scripting, upgrade, reporting and integration experience; ability to obtain FDA Public Trust; experience with QBE reporting and SciNote integration; validation and FDA security compliance experience.
STARLIMS, SciNote, QBE Query Manager
1mo
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Quality Engineer
Saint Louis, Missouri, United States
OnsiteFull Time
2+ YOE2+ years SDET/test engineering experience; proficiency in Python, JavaScript, or Java; experience with Selenium, Cypress, or Playwright; API testing (Postman/REST Assured); CI/CD integration; Agile experience and strong analytical/communication skills.
Python, JavaScript, Java, Selenium, Cypress, Playwright, CI/CD, Postman, REST Assured, JMeter, K6, LoadRunner, iOS, Android, AWS, Azure, GCP, Docker
2w
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Application Developer II
St. Louis, Missouri, United States
OnsiteFull Time
3+ YOE3+ years developing integrations and applications using iPaaS (Boomi/Mulesoft/Snaplogic), SQL, JSON/XML, modern stacks (.NET,C#/Node.js/TypeScript/Python/Ruby), DevSecOps practices and cloud platforms (AWS/Azure).
Boomi, Mulesoft, Snaplogic, SQL, JSON, XML, Palantir, .NET 6+, C#, Node.js, TypeScript, Python, Ruby, Ruby on Rails, Sinatra, ActiveRecord, CI/CD, DAST, SAST, SCA, Checkmarx, OWASP, GitHub, Snyk, Terrascan, Terraform, SFTP, PGP, AWS, Azure, Microsoft Office 365
2w
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Application Developer II
St. Louis, Missouri, United States
OnsiteFull Time
3+ YOE3+ years experience with enterprise iPaaS (Boomi/Mulesoft/Snaplogic), strong SQL and API integration skills, JSON/XML knowledge, application development on modern stacks (.NET6+/C#, Node.js/TypeScript, Python, Ruby), DevSecOps familiarity, cloud and container experience, Agile.
Boomi, Mulesoft, Snaplogic, Palantir, .NET 6+, C#, Node.js, TypeScript, Python, Ruby, Ruby on Rails, Sinatra, ActiveRecord, SQL, JSON, XML, CI/CD, DAST, SAST, SCA, Checkmarx, OWASP, GitHub, Snyk, Terrasan, Terraform, SFTP, PGP, AWS, Azure, Microsoft Office 365
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