Senior Software Engineer Fullstack

About the Company

Stone is a technology and financial services company focused on the customer. We are the largest independent payment methods company in Brazil, aiming to transform the payment industry and serve Brazilian entrepreneurs.

Responsibilities

• Build long-term, high-quality solutions from discovery to delivery
• Propose technical improvements and question the status quo in business flows
• Translate complex business rules into clean, testable, and maintainable code
• Build and evolve scalable, asynchronous solutions using the AWS ecosystem
• Support the continuous migration of legacy services to modern architectures

Requirements

• Software development with TypeScript and Node.js
• Focus on NestJS
• Experience with distributed cloud systems (containers, message queues, relational and non-relational databases)
• Solid knowledge of algorithms, data structures, Design Patterns, and SOLID
• Proficiency in unit and integration testing
• Experience with Docker/containerization and Git/Gitflow
• Product vision to balance technical quality with business feasibility

Preferred Qualifications

• Experience with serverless architecture and AWS (Lambda, Step Functions, DynamoDB)
• Background in financial markets, payment methods, or sales-oriented products
• Experience acting as a technical reference and mentoring team members
• Familiarity with production experimentation (A/B testing, Amplitude, etc.)
• Ability to use AI tools to accelerate development and discovery