38,592 Full Stack Sr Developer jobs in the United States

• Lead the full lifecycle development of web applications, from conceptualization and design to implementation, testing, deployment, and maintenance.
• Architect and develop robust and scalable backend systems using Python and relevant frameworks (e.g., Django, Flask).
• Design and implement intuitive and high-performance user interfaces using Angular and modern front-end technologies.
• Leverage AWS Bedrock to integrate and utilize various foundation models for tasks such as natural language processing, text generation, and more.
• Design, develop, and implement agentic systems, including planning, reasoning, tool usage, and memory management, to automate complex workflows and enhance application intelligence.
• Develop and maintain APIs (RESTful, GraphQL) to facilitate communication between front-end and back-end systems, as well as integration with external services.
• Design and manage data models and databases (both relational and NoSQL) to support application requirements.
• Write clean, well-documented, and testable code following best practices and coding standards.
• Collaborate effectively with product managers, designers, data scientists, and other engineers in an agile development environment.
• Participate in code reviews to ensure code quality and knowledge sharing.
• Troubleshoot and debug complex issues across the full stack.
• Stay up to date with the latest advancements in Angular, Python, cloud technologies (especially AWS), large language models, and agentic systems.
• Contribute to technical documentation and knowledge sharing within the team.

• Angular
• Python
• AWS cloud technologies
• Additional Skills:
• Knowledge of AWS Bedrock to integrate and utilize various foundation models.

Location Saint Louis, Missouri

Rate -DOE Only US Citizen, Green Card, GC EAD, and H4 EAD

We Are Not Allowed the Third Party Employer for Corp to Crop

Job Description Requirements:

Bachelor's or Master's degree in Computer Science, Engineering, or related field

Minimum 6 plus years' experience in.

• Lead and manage a team of Application Developers through the full Software Development Life Cycle, including design, development, security, and testing.
• Oversee the development of custom solutions leveraging technologies such as TypeScript, JavaScript, .NET, C#, Flutter, and SQL.
• Perform code reviews, provide mentorship, and drive best practices in code quality and optimization.
• Manage and improve DevOps pipelines for continuous integration and deployment.
• Conduct business process analysis and contribute to system architecture design.
• Monitor systems, troubleshoot issues, and conduct root-cause problem analysis.

• 5+ years of experience as a Software Engineering Manager or Team Lead, with proven ability to lead and motivate a team.
• Hands-on development experience with multiple technologies, including TypeScript, JavaScript, .NET, Flutter, SQL, and Azure DevOps.
• Bachelor’s degree in Computer Science or a related field (or equivalent experience).
• Energetic, positive attitude with strong leadership and communication skills.
• Must be able to work 5 days a week on-site in O’Fallon, MO.

• Competitive salary commensurate with experience.
• Group Insurance (Medical, Dental, Vision, Life, etc.).
• 401 (k) with Employer Match.
• Discounted Tuition Opportunities.
• Professional Development Programs.
• On-site recreational facilities (gym, basketball, and more).
• Additional employee perks.

Summary of Position Functions

The Senior Full Stack Developer performs in a lead role on an agile (scrum) development team to create software products that meet corporate objectives. A senior developer can oversee multiple products at once or a single large-scale effort on a single product while mentoring other developers and guiding their growth. The person in this position seeks accountability and is willing to put in extra effort to exceed expectations. A senior developer has an expert command of technology and has mastered the development tools used at T2 Systems.

Essential Position Functions

• Participates and leads development teams to build best in class software for the parking industry with little or no supervision.
• Proactively participates in all aspects of the product development life cycle within an agile framework.
• Can clearly communicate high-level technical problems and solutions to non-technical stakeholders.
• Assumes a high level of accountability for the quality of the product and code that is delivered to production.
• Collaborate cross-functionally to align software solutions with business and operational goals.
• Provides estimates for design specifications and is accountable for these estimates.
• Interacts with product owners and possibly customers to gather information, provide education, give status updates, and communicate relevant software development related activities.
• Provides recommendations on architecture direction, product direction, and developments tools.
• Promotes a clear vision of the high-level technical direction and has ideas and recommendations to accomplish those goals.
• Collaborates with other departments to provide designs that will solve business problems and ultimately benefit our customers.
• Champion software quality through rigorous code reviews, automated testing, continuous integration practices, and reduction of technical debt.
• Produce and maintain comprehensive documentation for software architecture, code, and development processes.
• Willing and capable of resolving work items (Bugs) in code developed by others.
• Consistently renders clear technical judgment while routinely considering both architecture guidance and sprint and roadmap implications.
• Works with Product Support to provide development that addresses customer issues.
• Consistently demonstrates innovation and imagination to go beyond assigned tasks.
• Craves accountability on the quality and timeliness of delivered outputs.
• Mentor other developers and promotes sound technical skills.
• Committed to self-study to maintain or increase technical abilities.
• Passionate about continuous improvement, efficiency at scale and automation.
• Demonstrated ability to incorporate usage of AI to improve efficiency of daily coding tasks

Note: The statements contained herein describe the essential functions of this position but should not be considered to be an all-inclusive listing of work requirements. Individuals may perform other duties as assigned including work in other areas to cover absences or relief to equalize peak work periods or otherwise balance the workload.

Education and Qualifications

To perform this position successfully, an individual must be able to perform each essential duty satisfactorily. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

• A bachelor’s or master’s degree plus 5 years or more development experience.
• Mastery of Visual Studio and related development tools. This mastery should extend into architecture, user interface design and implementation, and project planning.
• Has 3 or more years of experience as part of an agile development team.

Knowledge, Skills, and Abilities

• 2+ years experience with low-computational power IoT devices / experience developing software systems using a leading IoT solution (Azure / AWS)
• Expertise with containerized technologies (e.g., Docker, Kubernetes).
• Expert knowledge of Visual Studio with an emphasis on C#.
• Expert knowledge of .NET Framework 4.8
• Expert knowledge of Azure DevOps, Azure Portal and other Azure Cloud technologies
• Working knowledge of the Atlassian toolset, especially JIRA and BitBucket (Git).
• Expert knowledge of at least one DB platform. Strong preference for ORACLE experience.
• Ability to stay on the leading edge of technology trends.
• Ability to effectively engage with stakeholders and colleagues across departments.
• Ability to create and deliver presentations and proposals.
• Ability to problem solve; define the problem, collect data, establish facts, draw conclusions.
• Ability to prioritize tasks and tactfully negotiate priority with end users.
• Ability to work under deadline pressure and extra hours if needed.

Preferred Qualifications

• Exposure to working with a software application that has integrations with embedded systems / hardware / peripheral devices
• Familiarity with ASP.NET SOAP web services and Web Forms

T2 Systems is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.

The Developer is responsible for the analysis, design, construction, testing, and implementation of business and technical information technology solutions through application of appropriate software development life cycle methodology. The scope for Developer (Core) is systems based on core technologies, while the scope for Developer (COTS) pertains to custom off the shelf systems. Developer (Niche) refers to niche technologies such as ecommerce systems and Specialty Development in Mobility and TPF. '-Constructs, tests, and implements portions of business and technical information technology solutions through application of appropriate software development life cycle methodology. -Participates in standard business and technical information technology solution implementations, upgrades, enhancements, and conversions. -Uses appropriate tools to analyze, identify, and resolve business and/or technical problems. '-Applies specialized knowledge in a single discipline such as assembly/integration, cross-discipline functions, knowledge engineering, industry expertise, or legacy evolution. -Interacts with the customer to gain an understanding of the business environment and technical context. -Validates scope, plans, and deliverables for assigned projects. '-Leads the design, development, implementation, and support of information technology solutions encompassing multiple specializations, platforms, and technologies. -Defines project scope, plans, and deliverables, including proposed implementation dates. -Researches, analyzes, recommends, and implements new technologies, standard processes, tools, and techniques
-Assists in defining alternate solutions for the business problem.

Quals--
**Verify Persona under EDUCATION / PERSONA section below.**

6 + years of experience required

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. NLB is committed to providing access, equal opportunity and reasonable accommodation for individuals with disabilities in employment, its services, programs, and activities. To request reasonable accommodation, contact HR department by sending an e-mail to

The Developer is responsible for the analysis, design, construction, testing, and implementation of business and technical information technology solutions through application of appropriate software development life cycle methodology. The scope for Developer (Core) is systems based on core technologies, while the scope for Developer (COTS) pertains to custom off the shelf systems. Developer (Niche) refers to niche technologies such as ecommerce systems and Specialty Development in Mobility and TPF. '-Constructs, tests, and implements portions of business and technical information technology solutions through application of appropriate software development life cycle methodology. -Participates in standard business and technical information technology solution implementations, upgrades, enhancements, and conversions. -Uses appropriate tools to analyze, identify, and resolve business and/or technical problems. '-Applies specialized knowledge in a single discipline such as assembly/integration, cross-discipline functions, knowledge engineering, industry expertise, or legacy evolution. -Interacts with the customer to gain an understanding of the business environment and technical context. -Validates scope, plans, and deliverables for assigned projects. '-Leads the design, development, implementation, and support of information technology solutions encompassing multiple specializations, platforms, and technologies. -Defines project scope, plans, and deliverables, including proposed implementation dates. -Researches, analyzes, recommends, and implements new technologies, standard processes, tools, and techniques
-Assists in defining alternate solutions for the business problem.

Quals--
**Verify Persona under EDUCATION / PERSONA section below.**

6 + years of experience required

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. NLB is committed to providing access, equal opportunity and reasonable accommodation for individuals with disabilities in employment, its services, programs, and activities. To request reasonable accommodation, contact HR department by sending an e-mail to

Direct message the job poster from SMART IT People

Wilmington DE (Onsite initially then hybrid 2 days/week)

Contract to hire opportunity

• Bachelors degree in computer science, IT, engineering, or a related technical field.
• 5+ years experience developing commercial-grade software systems, with an emphasis on real-time operational systems
• Experience with React.js strongly preferred
• Familiarity with Azure Dev Ops a plus
• Familiarity with SQL Server a plus
• Must be comfortable working with end-users who have varying levels of technical knowledge
• Ability to work on small teams to deliver world-class software projects
• Strong attention to detail with an analytical mindset and outstanding problem-solving skills.
• Awareness of current cybersecurity trends and hacking techniques
• Gather system requirements from end users and document for implementation.
• Post-production deployment, troubleshoot software and network-related issues.
• Participate in the Software Change Management Process.
• Act as Tier 2/Tier 3 Support for operational issues with the given application
• Stay apprised of software development trends, recommend improvements to our DevOps process where appropriate
• Willingness to travel to other sites as needed (~10%).
• Other duties as assigned.

• Mid-Senior level

• Contract

• Information Technology

• Transportation, Logistics, Supply Chain and Storage

About the Role:
We are seeking a highly skilled Full Stack Developer with expertise in Node. js, Spring Boot, and Java to join our team. The ideal candidate will be instrumental in modernizing and optimizing our core application while ensuring scalability, maintainability, and compliance. You will work closely with infrastructure and operations teams to troubleshoot complex issues and implement standardized solutions.

Key Responsibilities:
Refactor & optimize legacy code to improve performance, efficiency, and maintainability.
Develop and maintain backend services using Spring Boot and Java.
Build scalable, high-performance front-end applications with JavaScript and Node. js.
Diagnose and troubleshoot critical infrastructure issues, ensuring system reliability and compliance.
Standardize development practices across applications to improve consistency and scalability.
Collaborate with cross-functional teams, including SREs and infrastructure engineers, to resolve technical challenges.
Enhance driver tracking and dependency management for improved visibility and control.
Improve estimation accuracy by analyzing project scope and complexity.

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to com. To learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy: .

Required Skills & Experience:
Strong proficiency in JavaScript, Node. js, Spring Boot, and Java
Experience working in a highly complex infrastructure environment
Deep understanding of troubleshooting & debugging applications at scale
Proven ability to refactor inefficient code and implement structured architecture
Strong analytical and problem-solving skills with an inquisitive mindset
Familiarity with driver dependency tracking & system integration
Experience with microservices architecture and RESTful APIs
Effective communication skills for cross-functional collaboration
Experience in enterprise software development
Knowledge of cloud platforms and containerization (e. g., Kubernetes, Docker)
Background in large-scale distributed systems
Previous experience in a SRE or infrastructure-related role