Senior Full Stack Engineer (NestJS, Next.js, PostgreSQL) at Agility.io

Location: Remote (Latin America) Job Type: Full-time, Contract About Us: AgilityIO is a software development firm that designs and builds custom applications for startups and Fortune 500 companies. We are a global team of over 400 developers, QA engineers, project managers, and UX/UI designers with offices in New York City and Vietnam. This is a full-time contractor role based in Latin America. We are seeking a versatile Senior Full Stack Developer to build intuitive front-end experiences and scalable serverless backend systems. This role is ideal for someone who enjoys working across the stack, with a strong focus on API integrations and modern web technologies. JOB RESPONSIBILITIES: - Architect, develop, and maintain full-stack applications using TypeScript, Next.js, and NestJS - Design and implement scalable, secure, and high-performance backend services and APIs - Build and optimize data models and queries using PostgreSQL - Collaborate with cross-functional teams (Product, Design, QA) to define, design, and deliver new features - Ensure applications meet high standards of performance, scalability, and security - Lead code reviews, mentor junior developers, and promote best engineering practices - Build and maintain CI/CD pipelines; ensure system reliability, monitoring, and observability - Identify technical risks and propose solutions aligned with business needs - Stay current with emerging technologies and continuously improve development processes QUALIFICATIONS & EXPERIENCE: - 5+ years of experience in full-stack software development - Strong proficiency in JavaScript/TypeScript across frontend and backend - Solid experience building backend systems with NestJS or similar Node.js frameworks - Experience developing frontend applications using Next.js or modern React-based frameworks - Strong experience working with relational databases, especially PostgreSQL - Deep understanding of RESTful APIs (GraphQL is a plus) - Experience with ORMs such as Prisma, TypeORM, or Sequelize - Familiarity with authentication/authorization patterns (JWT, OAuth) - Proficiency with Git, testing frameworks, and agile development practices - Strong problem-solving skills and attention to detail - Excellent communication skills in English and ability to work in distributed teams - AI-Assisted Coding Experience: Proven hands-on experience using LLM-based tools such as Cursor, GitHub Copilot, Tabnine, or Claude Code - Experience with finance systems PREFERRED QUALIFICATIONS: - Experience with cloud platforms (AWS, GCP, or Azure) - Experience with containerization (Docker) and modern deployment workflows - Familiarity with CI/CD tools (e.g., GitHub Actions, GitLab CI) - Experience with Infrastructure as Code (Terraform, Pulumi, or similar) - Knowledge of microservices or event-driven architectures - Experience with monitoring and observability tools (Datadog, Prometheus, etc.) - Familiarity with frontend performance optimization and SSR/SSG concepts in Next.js WHAT WE OFFER: - Competitive salary and performance-based bonuses - Flexible remote work environment - Professional growth opportunities and mentorship - Engaging and collaborative team culture with cutting-edge projects READY TO MAKE AN IMPACT? If you’re passionate about both frontend and backend development and thrive in a dynamic, product-driven environment, we’d love to hear from you.