Fullstack Staff Engineer in Mexico City at DEUNA

We are looking for a Staff Software Engineer – Fullstack to act as a senior technical leader across our engineering organization.

This is a high-impact individual contributor role, focused on driving architecture, setting technical direction, and solving complex, cross-team challenges. You will partner closely with Engineering, Product, and leadership to ensure our systems scale reliably as the business grows.

This role is not focused on people management — instead, you will operate as a technical authority and multiplier, influencing multiple teams and raising the overall engineering bar.

• Own and evolve the architecture of critical fullstack systems across frontend and backend.

• Lead the design of scalable, high-performance, and resilient distributed systems.

• Set and uphold engineering standards, best practices, and design principles.

• Drive alignment across teams on architectural decisions and technical direction.

• Contribute to high-impact areas of the codebase.

• Write clean, maintainable, production-grade code.

• Lead complex refactors and performance optimization efforts.

• Conduct in-depth code reviews and mentor engineers through technical guidance.

• Partner with Product and Engineering leaders to evaluate trade-offs across scalability, performance, cost, and security.

• Design APIs, data models, and system interactions that support long-term growth.

• Guide teams on handling edge cases, failure scenarios, and observability.

• Identify system bottlenecks and drive scalable solutions.

• Influence long-term technical strategy and roadmap.

• Evaluate and introduce new technologies where they add meaningful value.

• Improve monitoring, instrumentation, and system reliability practices.

• Proven experience as a Staff, Principal, or Senior Software Engineer in fullstack environments.

• Strong frontend expertise with:

  • React

  • Next.js

  • TypeScript

• Strong backend experience with:

  • Golang and/or Python

• Deep experience designing distributed systems and scalable APIs.

• Strong fundamentals in:

  • Data structures and algorithms

  • System design and architecture

  • Design patterns and trade-offs

• Hands-on experience with AWS and cloud-native architectures.

• Experience with SQL and NoSQL databases.

• Strong debugging, performance optimization, and refactoring skills.

• Excellent communication skills, with the ability to influence technical decisions.

• Fluent or native English (Spanish is a plus).

• Experience in payments, fintech, e-commerce, or transaction-heavy platforms.

• Experience building high-availability, low-latency systems.

• Familiarity with regulated environments (PCI-DSS, financial systems, etc.).