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42 software integration engineer jobs at 28 companies in St. Louis, MO

1mo
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Sr Software Developer - API Integration
Creve Coeur or St. Louis
$110k-$130k/yr HybridFull Time
First Bank
First Bank: A family-owned bank providing financial solutions to businesses and individuals.
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
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1mo
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Systems Integration Engineer (Experienced or Lead)
Hazelwood or Saint Charles or Berkeley
$112k-$185k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
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
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1mo
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Systems Integration Engineer (Experienced or Lead)
Hazelwood or Saint Charles or Berkeley
$112k-$185k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
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
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Systems Integration Testing Engineer
St Louis, Missouri, United States
$112k-$179k/yr OnsiteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
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.
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2w
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Lead Software Engineer
O'Fallon, Missouri, United States
HybridContract
Delan Associates
Delan Associates: Provides engineering and professional services to government agencies.
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
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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
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
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
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2mo
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Software Development Engineer II- Back End
Redlands or St. Louis or Vienna
$97k-$162k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
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
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2w
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Mid Software Engineer (SFA)
Saint Louis, Missouri, United States
OnsiteFull Time
Kentro
Kentro: Provider of digital and IT services for federal agencies.
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
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Full Stack Software Developer (.NET/React)
St. Louis, Missouri, United States
HybridFull Time
Copeland
Copeland: Provides compression and control solutions for climate technologies.
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
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6d
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Missions Systems Software Engineer - Embedded (Associate, Experienced, Senior)
Berkeley, Missouri, United States
$99k-$217k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures commercial airplanes, defense systems, and space technology.
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
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2mo
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Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Augustine Institute
Augustine Institute: Provides Catholic theological education and media for faith formation.
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
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2w
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Director - Software/ AI Native Engineer
St. Louis, Missouri, United States
$175k-$180k/yr OnsiteFull Time
Tech Mahindra
Tech MahindraNational Stock Exchange of India: TECHM: Global provider of information technology and business process services.
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
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3mo
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Software Development Engineer in Test (SDET) II
O’Fallon, Missouri, United States
$92k-$147k/yr HybridFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
SDET with experience building functional, integration, and UAT test strategies for high-throughput systems. Linux, shell scripting, and programming in C/C++ or Java. Git experience. Bachelor’s in CS/SE/IT/Math. Strong communication.
Linux, Shell scripting, C, C++, Java, Git
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1mo
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Senior Developer
Sunset Hills, Missouri, United States
RemoteFull Time
Grimco
Grimco: Manufacturer and distributor of signs and sign-making supplies.
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
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1d
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Generative AI/ML Intelligent Document Processing Engineer
Irving or Atlanta or Hopkins or San Francisco or Charlotte or New York City or Chicago or Gresham or Englewood or Cincinnati or Brookfield or Earth City
$105k-$124k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
3+ YOE3+ years IDP experience, hands-on Tungsten/Kofax, strong C#/.NET and SQL skills, Azure and AI/ML integration experience, production software engineering and stakeholder collaboration skills.
Tungsten, Kofax, C#, .NET, SQL, Microsoft Azure, AI/ML, Generative AI, IBM DataCap, Retrieval-Augmented Generation (RAG), APIs
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4d
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Angular/NodeJS Engineer
St. Louis or California or Colorado or Illinois or Minnesota or New Jersey or New York or Oregon or Washington or United States
$85k-$117k/yr RemoteFull Time
Syms Strategic Group
Syms Strategic Group: Provides IT and professional services to federal government agencies.
8+ YOE8+ years software development with Java and/or NodeJS, Angular front-end experience, RESTful API design, healthcare/EDI data knowledge, AWS cloud experience, Git/GitHub, unit/integration testing, and U.S. citizenship with Public Trust eligibility.
Java, NodeJS, Angular, C#, .Net, AWS, Azure, API Gateway, Lambda, S3, CloudWatch, Git, GitHub, JUnit, Jest, Docker, ECS, EKS, JIRA, Microsoft Teams, Electronic Data Interchange (EDI), XML, JSON
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2w
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Full Stack Developer 729
St. Louis, Missouri, United States
OnsiteFull Time
Freedom Technology Solutions Group
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
Active TS/SCI clearance, experience in software development/system integration, familiarity with AWS services, CI/CD, containerization, GitLab, Agile, and customer-facing technical communication.
S3, Lambda, SQS, SNS, ECS, ECR, EKS, API Gateway, Cloudwatch, KMS, GitLab CI/CD, GitLab, Docker, Podman, Kubernetes, Harbor, CloudFormation, CDK, Terraform, Linux, JavaScript, React, Angular, HTML5, CSS3, Auroa, PostgreSQL/PostGIS, Oracle, Redis, Memcache, Elasticache, GDAL/OGR, GitLab
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2w
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STARLIMS Developer
St. Louis, Missouri, United States
RemoteFull Time
Precise Software Solutions
Precise Software Solutions: A technology services delivering secure digital platforms, infrastructure, and operational IT services to government organizations.
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
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2w
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Senior NetSuite Engineer
Chesterfield, Missouri, United States
OnsiteFull Time
Imperial
Imperial: Designs and manufactures premium headwear and lifestyle apparel.
3+ YOE3+ years NetSuite development experience, proficiency in SuiteScript 2.x, SDF, SuiteTalk/REST/SOAP integrations, JavaScript, strong troubleshooting and stakeholder communication; Bachelor\u0002s in CS/IS or equivalent.
SuiteScript 1.0, SuiteScript 2.x, SuiteCloud Development Framework (SDF), SuiteTalk, REST, SOAP, JavaScript, Celigo, Boomi, MuleSoft, HTML, CSS, SQL
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Quality Engineer
Saint Louis, Missouri, United States
OnsiteFull Time
KNOWiNK
KNOWiNK: Provider of digital poll book and election management software.
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
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