Senior Full-stack Developer

Company Description

INTRO
Are you passionate about building scalable, high-load systems and tackling complex engineering challenges? Join Sigma Software’s team as a Senior/Principal TypeScript Full Stack Engineer with a strong backend focus, and work on a modern, high-impact product alongside a distributed, collaborative team.

This role is open to candidates based in LATAM and Europe, offering the flexibility to work in a global environment and contribute to cutting-edge architecture while enhancing your expertise in backend development.

At Sigma Software, we value innovation, technical excellence, and career growth. You’ll be part of a project where your work directly influences product performance, scalability, and user experience.

CUSTOMER
Our customer is a leading SaaS provider in the FinTech industry, specializing in AI-native revenue platforms for finance and accounting teams. Their solutions cover subscription management, billing, and revenue operations for companies of all sizes. With a strong focus on compliance, scalability, and integration with multiple payment gateways, they help businesses streamline financial processes and accelerate growth.

PROJECT
This high-impact project focuses on designing and maintaining backend services for distributed systems, with occasional contributions to frontend components. You’ll work with modern technologies, applying best practices in architecture, testing, and code quality. The team operates in a collaborative, agile environment, ensuring scalability, reliability, and security across all services.

Key Technologies: TypeScript, NestJS, Turborepo, React, Next.js, pnpm, relational databases, caching systems, AWS, CI/CD

Job Description

RESPONSIBILITIES

• Design, develop, and optimize backend services and APIs for high-load, distributed systems
• Contribute to frontend components using React and Next.js when required
• Ensure scalability, reliability, and security across all services
• Apply best practices in software architecture, code quality, and testing
• Participate in code reviews, mentoring, and technical discussions
• Collaborate with product managers, designers, and other engineers to deliver end-to-end features

Qualifications

REQUIREMENTS

• 5+ years of experience in software engineering
• Strong proficiency in TypeScript with deep backend expertise
• Solid understanding of relational databases and caching systems
• Familiarity with frontend frameworks (React, Next.js)
• Preferred technologies and tools: NestJS, Turborepo, monorepo environments (pnpm or similar)
• Knowledge of cloud environments (AWS preferred) and CI/CD practices
• Strong understanding of software architecture principles and scalability strategies
• Excellent problem-solving skills and ability to work in a collaborative, agile environment
• Upper-Intermediate English level or higher

Additional Information

WILL BE A PLUS:

• Experience with NestJS and/or Turborepo
• Familiarity with monorepo environments (pnpm or similar)
• AWS expertise

PERSONAL PROFILE:

• Enjoys solving complex challenges
• Collaborative mindset in distributed teams
• Strong problem-solving abilities
• Committed to code quality and scalability