Don Kavi Agency is growing, and we're looking for a Senior Full-Stack Engineer to join our team and help build secure, high-performing custom web applications for U.S.-based clients.

This role is idóneo for an experienced engineer who is comfortable owning complex technical projects from front-end development through backend architecture, database design, cloud infrastructure, and secure payment integrations.

You'll work closely with our developers, designers, Account Managers, and other digital specialists to build meaningful digital products and solve complex business challenges.

What You'll Be DoingYou'll help design, build, and maintain custom web applications with a strong focus on security, reliability, and payment functionality.

Some of what you'll do includes:Build and maintain production web applications using React, Next.js, Node.js, and Express.
Design and maintain PostgreSQL databases, including schema design, queries, and migrations.
Develop secure integrations with payment processors such as Stripe and PayPal.
Implement payment functionality, including tokenization,



webhook verification, idempotent charges, refunds, disputes, and reconciliation.
Deploy, maintain, and optimize applications and infrastructure in AWS.
Design and implement secure authentication, session management, and role-based access control.
Build systems that safely handle sensitive personal and financial data.
Implement audit logging, secrets management, least-privilege access, and other secure development practices.
Identify, troubleshoot, and resolve complex technical and security-related issues.
Maintain high standards for code quality, performance, scalability, and reliability.
Collaborate with cross-functional teams to translate business and client requirements into technical solutions.
Contribute to technical architecture, development processes, and engineering best practices.

What We're Looking ForWe're looking for a senior engineer who is thoughtful, reliable, security-co

📌 Senior Full-Stack Engineer/Payments (Medellín)
🏢 Don Kavi Agency
📍 Medellín