Senior Fullstack Engineer, React, Node.JS, C#

This is a fully remote position, open to applicants in Latin America.

📋 Description

• Develop and sustain features on the Tax Provision 2.0 platform, which includes React microfrontend screens, TypeScript serverless Lambdas, and Fastify services.

• Contribute to the shared @btas/btas-tax-provision-business-rules TypeScript library and its C# code generation pipeline.

• Create and uphold unit, integration, and end-to-end tests utilizing Jest, Playwright, and K6.

• Design and implement AWS infrastructure modifications using Terraform for Lambda, ECS, API Gateway, RDS/PostgreSQL, DynamoDB, S3, CloudFront, and Secrets Manager.

• Engage in the development and maintenance of GitLab CI/CD pipelines, which includes security scanning and Terraform deployment pipelines.

• Work collaboratively with architects and product teams on asynchronous job patterns, calculation service APIs, and data-layer abstractions.

• Leverage AI coding assistants by crafting precise prompts, critically reviewing generated code, and integrating outputs within a vast multi-repository codebase.

• Oversee and enhance the legacy ASP.NET Framework 4.7.2 application during its migration process.

• Facilitate a modern cloud-native platform for intricate corporate tax calculations.

⛳️ Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related discipline.

• Proficient in TypeScript/JavaScript and Node 18.

• Expertise in React 18 and contemporary React patterns, including hooks, context, and query management.

• Familiarity with C#/.NET, preferably modern .NET 10 and legacy .NET Framework 4.7.2.

• Experience with AWS Lambda and API Gateway utilizing AWS SAM/CloudFormation.

• Knowledge of Fastify v5, TypeBox schema validation, and Swagger documentation.

• Strong background in PostgreSQL, encompassing schema management, query optimization, and TypeORM migrations.

• Experience with microfrontend architecture and single-spa or similar composition methodologies.

• Proficiency in MobX/MobX-State-Tree and TanStack React Query.

• Knowledge of Terraform for AWS infrastructure modules.

• Familiarity with Docker/Docker Compose.

• Understanding of GitLab CI/CD, pipeline authoring, shared templates, and environment management.

• Experience with Jest, Playwright, and K6 for various types of testing, including unit, integration, end-to-end, load, and performance testing.

• Practical experience with AI coding tools such as Cursor, GitHub Copilot, or Claude Code, or their equivalents.

• Ability to effectively utilize AI assistants in a large multi-repository codebase, including context management, prompt engineering, and critical assessment of generated outputs.

• Advanced proficiency in English is required; effective communication in English is crucial for collaboration with US clients.

🏝️ Benefits

• Competitive USD salary.

• 100% remote work opportunity.

• Flexibility to achieve professional success while prioritizing personal well-being.

• Access to coworking spaces throughout LATAM.

• Paid time off and national holidays in accordance with the employee’s country regulations, with full salary coverage.

• Sick leave provisions.

• Annual credit for work-life balance benefits.

• Opportunities for team-building activities, coffee breaks, tech talks, and after-work gatherings.

• A day off during the birthday week.

• Wellness check-ins and professional development support from the People Care team.

• A culture of autonomy, open communication, and respect for diversity.

• Engagement in virtual community activities tailored for the LATAM remote team.