> Markdown version of [/jobs/ext/3115705-senior-full-stack-software-developer](https://www.wearedevelopers.com/jobs/ext/3115705-senior-full-stack-software-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Software Developer - **Company:** SPARTAN INNOVATIONS LLC - **Location:** Belleville, IL, United States (Remote available) - **Experience:** Expert - **Salary:** $125,000.0 - $140,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Data Analysis, Apache HTTP Server, Application Services, Cascading Style Sheets (CSS), Cloud Computing, Code Review, Cyber Security, Information Systems, Databases, Continuous Integration, Data as a Services, Relational Databases, Spring Framework, PostgreSQL, MySQL, Software Maintenance, Release Management, Ansible, Secure Coding, Software Engineering, SQL Stored Procedures, TypeScript, Data Logging, Enterprise Software Applications, ReactJS, Delivery Pipeline, Spring-boot, Database Performance, Indexer, Gitlab, Cloudformation, Containerization, Gitlab-ci, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Cloudwatch, Restful APIs, Terraform, Code Restructuring, Devsecops, Docker, Legacy Systems, Microservices, Dynamic Application Security Testing - **Published:** September 27, 2026 - **Apply:** https://www.careerjet.com/job/usc421735e41096980942d25d365c49c56/eaa ## About the Role * Eight or more years of professional software-development experience, including the design and delivery of complex enterprise applications. * Hands-on full stack development experience with React, Java, and Spring or Spring Boot; working knowledge of JavaScript or TypeScript, HTML/CSS, REST APIs, and relational databases. * Bachelor's or master's degree in Computer Science, Cybersecurity, Data Science, Software Engineering, Information Technology, or Information Systems; or one of the following certifications: FITSP-D, GCSA, GISF, or SSCP. * Ability to satisfy applicable DoD workforce-certification requirements. * Ability to analyze complex mission and technical requirements and translate them into secure, reliable, and maintainable software solutions. * Ability to obtain and maintain a Secret security clearance. ## Description Spartan Innovations is seeking a Senior Full Stack Software Developer to support cloud migration and application modernization initiatives. You will design, develop, integrate, test, deploy, and maintain secure, mission-critical applications supporting global transportation and logistics operations. The role requires hands-on React, Java, and Spring experience alongside legacy application modernization, containerization, GitLab CI/CD, Apache Superset analytics, Amazon Aurora migration, infrastructure automation, and DevSecOps security controls. Key responsibilities * Build and maintain React user interfaces and Java and Spring or Spring Boot back-end services, connecting the full stack through secure APIs and data services. * Design, develop, test, deploy, and maintain enterprise applications, microservices, RESTful APIs, and system-integration components. * Refactor and modernize legacy applications for deployment within secure AWS cloud environments. * Containerize applications and supporting services using Docker, Kubernetes, Amazon ECS, Amazon EKS, or comparable technologies. * Develop and manage GitLab CI/CD pipelines and GitLab Runners that automate software builds, testing, security validation, container-image creation, deployment, and release management. * Integrate automated unit, integration, regression, performance, and security testing into CI/CD workflows. * Incorporate static and dynamic application security testing, software-composition analysis, dependency scanning, container scanning, secrets detection, and compliance controls into the delivery pipeline. * Develop, configure, and integrate Apache Superset dashboards, datasets, visualizations, APIs, semantic-layer components, authentication, and role-based access controls. * Support the modernization and migration of legacy databases to Amazon Aurora PostgreSQL or Aurora MySQL. * Assess and remediate database schemas, stored procedures, data types, queries, indexing, and application dependencies for compatibility with Aurora. * Optimize database performance, availability, scalability, resiliency, and application connectivity. * Develop reusable infrastructure-as-code using Terraform, AWS CloudFormation, Ansible, or comparable automation tools. * Automate the provisioning and configuration of AWS infrastructure, container platforms, databases, networking, monitoring, and application services. * Implement centralized logging, monitoring, alerting, auditing, and operational dashboards using AWS CloudWatch or comparable observability platforms. * Apply secure coding standards and support DoD cybersecurity, Risk Management Framework, software-assurance, and applicable STIG requirements. * Troubleshoot application, container, pipeline, database, integration, security, and performance issues across development, test, staging, and production environments. * Participate in Agile ceremonies, architecture reviews, technical design sessions, code reviews, sprint demonstrations, and release planning. * Prepare and maintain system designs, interface specifications, deployment procedures, pipeline documentation, infrastructure diagrams, and operational runbooks. * Provide technical leadership and mentor team members in cloud-native development, containerization, database modernization, automation, and DevSecOps practices. * Collaborate with software architects, cloud engineers, database administrators, cybersecurity personnel, testers, product owners, and government stakeholders., Description The Leidos National Solutions Division has an exciting opportunity for a Journeyman Full Stack Engineer to assist with the software development, maintenance, integrat… + 1 month ago + ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Enabling automated 1-click customer deployments with built-in quality and security](https://www.wearedevelopers.com/videos/83-enabling-automated-1-click-customer-deployments-with-built-in-quality-and-security) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) ## Related Articles - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know)