Senior Full Stack Developer

Senior Full Stack DeveloperCosta Rica - RemoteDuration: 8 to 12 Months
Job Description:We’re looking for a Senior Full Stack Developer to join our team and help build, enhance, and support business-critical applications across a modern Microsoft and JavaScript technology stack. This is an exciting opportunity for an experienced engineer who enjoys working across the full software lifecycle — from user interface development and API design to database engineering, cloud infrastructure, and production support.
You’ll play a key role in delivering scalable, high-quality solutions within a collaborative Agile environment, contributing to both new feature development and the ongoing modernization of complex enterprise systems.
What we’re looking forProven experience as a Senior Full Stack Developer or similar roleStrong hands-on experience with C#, .NET, and building APIs / backend servicesStrong front-end development experience using React, JavaScript, and TypeScriptSolid experience with SQL Server and T-SQL in data-intensive applicationsExperience working with Snowflake and cloud-based data platformsGood knowledge of Entity Framework and common repository/data access patternsFamiliarity with AWS, including services such as EC2, RDS, and related infrastructure conceptsExperience working in Agile teams and participating in standard delivery ceremoniesStrong problem-solving skills and the ability to work effectively in complex enterprise environmentsExcellent communication and collaboration skillsFamiliarity with CI/CD pipelines, automated testing, and deployment best practices
Nice to haveExperience with Hangfire or similar background job processing frameworksExperience working on legacy application modernizationWhat you’ll be doingDesigning, building, and maintaining responsive front-end applications using React, JavaScript, and TypeScriptDeveloping robust, scalable APIs and backend services using C# and .NETWorking across application, domain, and data access layers within a structured enterprise architectureDesigning, developing, and optimizing SQL Server / T-SQL queries, stored procedures, and other database objectsSupporting integrations between front-end applications, backend services, databases, and third-party/internal platformsWorking with cloud-hosted environments and infrastructure, including AWS services such as EC2 and RDSContributing to software quality through code reviews, testing, debugging, and performance tuningSupporting CI/CD and release processes using tools such as Jenkins and modern front-end build toolingParticipating fully in Agile ways of working, including sprint planning, backlog refinement, daily standups, reviews, and retrospectivesCollaborating closely with product, QA, and engineering stakeholders to deliver business value