Full Stack Developer

SMASH, Who we are? We are agents for tech professionals in Costa Rica and Colombia that help them build careers in the United States. We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step. We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast. We purposefully move away from the “contractor” or “outsourcing” type of relationship. Our clients don’t want contractors or “just a service.” Neither does our talent. Our Benefits Wellness Coverage Remote Work Birthday day off Recognition and rewards system Referrals Program Business skill coaching English classes for Smashers and relatives Learning opportunities This position is Remote to work with a US Company; you will require to have Citizenship or a work permit from Costa Rica, Colombia, Argentina or Salvador to apply for this role. Role summary You will develop and enhance enterprise web and desktop applications while collaborating with cross-functional teams to deliver reliable, scalable software solutions. This role focuses on full-stack development, application integrations, and continuous improvement throughout the software development lifecycle. Responsibilities Develop and maintain web and desktop applications using .NET Core, Flask, Express.js, Angular, and Electron. Build responsive user interfaces and scalable backend services. Develop and optimize SQL Server, PostgreSQL, and MongoDB databases. Write clean, maintainable code using C#, Python, JavaScript, and TypeScript. Participate in application architecture and technical design discussions. Develop and integrate RESTful APIs and third-party services. Perform unit testing and support defect resolution throughout the development lifecycle. Troubleshoot application, database, and integration issues across development, QA, and production environments. Participate in code reviews and follow software engineering best practices. Support production incidents, root cause analysis (RCA), and application maintenance. Optimize applications for performance, scalability, and reliability. Collaborate with QA, Product, and Engineering teams to deliver high-quality software. Requirements – Must-haves Bachelor's degree in Computer Science, Information Technology, or a related field. 4+ years of Full Stack software development experience. Strong experience with .NET Core, Flask, and Express.js. Experience developing applications with Angular (React experience is also valuable). Experience with Electron desktop applications. Strong programming skills in C#, Python, JavaScript, and TypeScript. Experience with SQL Server, PostgreSQL, and MongoDB. Experience building and consuming RESTful APIs. Experience with Git and Azure DevOps. Experience with Docker, Kubernetes, and microservices architecture. Strong analytical and problem-solving skills. Excellent communication and collaboration skills. Nice-to-haves (optional) Experience with Microsoft Azure. Experience using AI-assisted development tools such as GitHub Copilot, ChatGPT, Claude, or Cursor. Experience in the travel and transportation industry. Experience supporting production environments and application deployments. Languages English C1 Spanish C1