Senior Full-Stack Developer (.NET & React, AWS)

We are seeking a Senior Full-Stack Developer to build and evolve scalable, cloud-native applications that support fleet optimization and operational efficiency across a large-scale vehicle network of 46,000+ assets in 545+ locations. You will work hands-on across front-end and back-end systems, collaborating closely with product, architecture, data, and business stakeholders to deliver high-quality solutions deployed on AWS.

Requirements

5+ years of experience in full-stack software development
Strong hands-on experience with .NET (C#) for backend services and APIs
Solid experience building modern front-end applications using React
Proven experience designing and consuming RESTful APIs
Good understanding of cloud-native application development on AWS
Experience working with relational and/or NoSQL databases
Strong understanding of software engineering best practices (clean code, testing, performance, security)
Experience working in agile, cross-functional teams
Ability to collaborate effectively with architects, data engineers, and business stakeholders

Nice-to-haves

Experience with microservices architectures
Familiarity with AWS services such as ECS/Fargate, Lambda, API Gateway, S3, SNS/SQS
Experience with event-driven architectures
Exposure to CI/CD pipelines and Infrastructure as Code (Terraform or CloudFormation)
Experience integrating frontend applications with data or analytics platforms
Familiarity with authentication and authorization mechanisms (OAuth2, JWT, enterprise SSO)
Experience working with high-load or enterprise-scale systems

Core Responsibilities

Develop and maintain end-to-end features across React front-end and .NET back-end services
Build scalable, maintainable APIs and business logic supporting fleet optimization workflows
Implement responsive, user-friendly interfaces with a strong focus on performance and usability
Integrate applications with cloud infrastructure, data platforms, and enterprise systems
Collaborate with Solution Architects to implement architectural patterns and best practices
Ensure code quality through reviews, automated testing, and adherence to engineering standards
Troubleshoot, optimize, and improve system performance, reliability, and scalability
Support deployments and production operations on AWS
Work closely with product and business teams to translate requirements into production-ready solutions

What We Offer

Continuous learning and career growth opportunities
Flexible working hours
Inclusive and supportive culture

About Us

Established in 2011, Trinetix is a dynamic tech service provider supporting enterprise clients around the world.

Headquartered in Nashville, Tennessee, we have a global team of over 1,000 professionals and delivery centers across Europe, the United States, and Argentina. We partner with leading global brands, delivering innovative digital solutions across Fintech, Professional Services, Logistics, Healthcare, and Agriculture.

Our operations are driven by a strong business vision, a people-first culture, and a commitment to responsible growth. We actively give back to the community through various CSR activities and adhere to international principles for sustainable development and business ethics.

To learn more about how we collect, process, and store your personal data, please review our Privacy Notice: https://www.trinetix.com/corporate-policies/privacy-notice

Senior Full-Stack Developer (.NET & React, AWS)

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