Role Description We are seeking a Senior Full-Stack Developer. Qualifications - 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 Requirements - 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 Benefits - Continuous learning and career growth opportunities - Professional training and English/Spanish language classes - Comprehensive medical insurance - Mental health support - Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more - Flexible working hours - Inclusive and supportive culture Company Description 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.

• Enhance and support internal and external web-based applications. • Analyze, design, code, test, implement, maintain and support complex business systems. • Contribute meaningfully to a team that builds technology products. • Collaborate with technology experts. • Learn new technologies & languages relevant to the team. • Develop skills coding, testing, and evaluating technical tradeoffs. • Participate in standup meetings, sprints, and take on projects related to the team’s goal. • Attend intern professional, personal, and social development events.

• Ensure high-quality product delivery as a Software Developer Engineer in Test (SDET) • Code advanced automated test suites for applications • Define manual testing plans and strategies • Work with developers to deliver testable code • Improve existing test infrastructure and frameworks • Mentor new QA team members

• Cross-functional collaboration — Work with engineering, data science, and product to evaluate requirements, scope projects, estimate effort, and prioritize work that delivers real value. • Design, develop and maintain web applications — Deliver value for our customers, both externally and internally facing. • Data ingestion at scale — Build pipelines that process millions of records from diverse sources (Jira, Github, payroll systems, accounting software, etc.) reliably and efficiently • Data modeling for flexibility — Design schemas flexible enough to handle different company types, industries, and business processes • Integrations — Read API documentation, build integrations with third-party systems, and handle the inevitable quirks of external data sources. • Customer-facing features — Ship functionality that helps finance teams run their monthly capitalization workflows • Internal tooling — Build tools that help the team operate and debug the system • Automated testing and deployment — Develop and maintain processes to ensure robust systems. • Code Review — Review other engineers’ code and provide timely and valuable feedback to ensure high quality. • Troubleshoot critical issues — Identify root-cause and eliminate recurrence through durable engineering fixes.