(1533) Senior Fullstack Engineer (React, Node.JS & C#)

Join   Nortal   for your next big adventure. We are   seeking   a   Senior  Fullstack  Engineer (React, Node.JS & C#)   to join our team, grow with us, and teach us a few things along the way.  

Why join   Nortal  

Say Goodbye to Micromanagement:   We   champion   autonomy, open communication, and respect for diversity as our core values.  

Outcomes Over Hours:   We believe in a work model focused on impact, providing you with the flexibility to balance your professional success with your personal well-being.  

Vibrant Community:   Join our close-knit LATAM remote team and connect through tech talks, virtual coffee breaks, and team-building activities.  

Support from Day One:   Our People Care team is here to support you throughout your journey, from wellness check-ins to professional growth.  

Our benefits   ✨  

Competitive USD salary.  

100% remote work:   While you can work from anywhere, you’re always welcome to connect with teammates and grow your network at our coworking spaces across LATAM.  

Paid   off   &   national   holidays:   Take   the   time   you   need   according   to   your   country’s   regulations   while   receiving   your   full   salary.  

Sick leave:   Focus on your health without   stress. Take the necessary time to recover and feel better.  

Annual   credit:   Spend   it   on   the   perks   you   love   to   enhance   your   work-life   balance.  

Team-building activities:   Join us for coffee breaks, tech talks, and after-work gatherings to bond with your   Nortal   family and feel part of our vibrant community.  

Birthday off:   Enjoy an extra day off during your birthday week to celebrate in style with friends and family.  

About the project  

As a  Senior  Fullstack  Engineer (React, Node.JS & C#) , you  will join the Tax Provision 2.0 (TP2.0) product team to build and maintain a modern, cloud-native platform supporting complex corporate tax calculations across a polyglot, multi-repo ecosystem spanning React  microfrontends , TypeScript serverless APIs, C# shared libraries, and AWS infrastructure, actively leveraging AI coding assistants to accelerate delivery and engineering productivity .  

What   you’ll   do  

Build and  maintain  features across the TP2.0 platform — from React  microfrontend  screens to TypeScript serverless Lambdas and  Fastify  services .  

Contribute to the shared @btas/btas-tax-provision-business-rules TypeScript library consumed by both frontend and backend, including its C# code-generation pipeline .  

Write and  maintain  unit, integration, and E2E tests using Jest, Playwright, and K6 .  

Develop and deploy infrastructure changes using Terraform targeting AWS (Lambda, ECS, API Gateway, RDS/PostgreSQL, DynamoDB, S3, CloudFront, Secrets Manager) .  

Participate in GitLab CI/CD pipeline development and maintenance, including security scanning and Terraform deployment pipelines .  

Collaborate with architects and product teams to evolve async job patterns (imports, report generation), calculation service APIs, and data layer abstractions .  

Use AI coding assistants effectively — writing precise prompts, reviewing AI-generated code critically, and applying outputs productively within a large existing codebase .  

Maintain and improve the  legacy  ASP.NET Framework 4.7.2 application as needed during migration .  

What makes you a great fit   🎯  

Bachelor's Degree in Computer Science , Engineering, or   a related   field.  

Experience working with  Strong TypeScript/JavaScript (Node 18 ) .  

Proficiency  with React 18 and modern React patterns (hooks, context, query management) .  

Working knowledge of C# / .NET (ideally both modern .NET 10 and legacy .NET Framework 4.7.2) .  

Experience working with  AWS Lambda  and  API Gateway (serverless handlers via AWS SAM / CloudFormation) .  

Experience working with  Fastify  (v5) . B uilding RESTful APIs with  TypeBox  schema validation and Swagger documentation .  

Strong experience working with  PostgreSQL  ( schema management, query optimization,  TypeORM  migrations ) .  

Microfrontend  architecture . E xperience with single-spa or similar composition patterns .  

Experience with  MobX  /  MobX -State-Tree and  TanStack  React Query for state and server state management .  

Experience working with  Terraform  ( writing and  maintaining  AWS infrastructure modules ) .  

Experience working with  Docker / Docker Compose  ( local development stacks ) .  

Familiarity working with  GitLab CI/CD  ( pipeline authoring, shared templates, environment management ) .  

Experience working with  Jest (unit + integration), Playwright (E2E), K6 (load/performance) .  

Hands-on experience with one or more AI coding tools: Cursor, GitHub, Copilot, Claude Code, or equivalent .  

Ability to use AI assistants effectively within a large, multi-repo codebase  ( including context management, prompt engineering, and critically evaluating generated output ) .  

Advanced English Level is   required   for this role,   as you will work with US clients. Effective communication in English is essential to deliver the best solutions to our clients and expand your horizons.    

Global Impact, Local Culture   🌍  

For over 25 years,   we’ve   been shaping digital transformation, delivering complex solutions for global enterprises and public sector organizations. Today, we are at the forefront of an  AI-driven transformation era, helping organizations turn data into   real business   value. By combining deep domain   expertise   with data and AI, we design solutions that create immediate impact while scaling for the future.      

We believe complexity   doesn’t   have to mean complicated, and that the best solutions are those that work in the real world, not just on paper.   That’s   why our clients trust us with their most ambitious, business-critical initiatives.    

Apply now and   let’s   shape the future of technology together!   🧑 ‍ 💻   By applying to this position, you authorize Nortal to collect, store, transfer, and process your personal data in accordance with our Privacy Policy. For more information, please review our  Privacy Policy.