Full Stack Staff Engineer

# Fullstack Staff Engineer ## About the Role DEUNA is seeking a Fullstack Staff Engineer to serve as a senior technical authority across the engineering organization. This is a hands-on technical leadership role focused on architecture, scalability, reliability, engineering standards, and complex cross-domain technical challenges. The ideal candidate is an experienced Senior Engineer, Principal Engineer, or Staff Engineer with strong fullstack expertise across React, Next.js, TypeScript, Golang and/or Python. This role is not focused on people management; instead, you will provide technical leadership across teams and help shape long-term architecture and engineering strategy in a fast-moving startup environment. ## Key Responsibilities * Define and evolve fullstack architecture across frontend and backend systems. * Lead complex system design initiatives focused on scalability, performance, and maintainability. * Establish and enforce engineering standards and best practices. * Drive technical alignment across multiple engineering teams. * Contribute directly to critical areas of the codebase. * Write scalable, production-ready, well-tested code. * Lead major refactoring and performance optimization initiatives. * Review code and provide deep technical guidance. * Partner with Product and Engineering leaders to evaluate scalability, security, cost, and speed trade-offs. * Design APIs, database schemas, caching strategies, and distributed systems. * Guide teams in handling edge cases, failure scenarios, and observability. * Identify architectural bottlenecks and recommend scalable improvements. * Evaluate new technologies and frameworks. * Improve system monitoring, instrumentation, and reliability practices. ## Required Qualifications * Extensive experience as a Senior Engineer, Principal Engineer, or Staff Engineer in fullstack environments. * Strong frontend expertise with React, Next.js, and TypeScript. * Strong backend experience with Golang and/or Python. * Deep experience designing distributed systems and scalable APIs. * Strong knowledge of data structures and algorithms. * Strong knowledge of design patterns. * Strong knowledge of system design and architectural trade-offs. * Experience with AWS and cloud-native architectures. * Experience with SQL and NoSQL databases. * Strong debugging, refactoring, and performance optimization skills. * Excellent written and verbal communication skills. * Native or fluent English. ## Preferred Qualifications * Spanish language skills. * Experience in payments, fintech, e-commerce, or transaction-heavy platforms. * Experience designing high-availability financial systems. * Exposure to compliance-sensitive or regulated environments. ## Skills & Competencies * Fullstack software engineering * Technical leadership * Software architecture * System design * Distributed systems * API design * Frontend development * Backend development * Database design * Debugging and troubleshooting * Refactoring * Performance optimization * Scalability and reliability * Cloud-native architecture * Technical decision-making * Cross-team collaboration * Written and verbal communication ## Education & Experience ### Experience * Extensive experience as a Senior Engineer, Principal Engineer, or Staff Engineer in fullstack environments. * Experience with frontend technologies including React, Next.js, and TypeScript. * Experience with Golang and/or Python for backend development. * Experience designing distributed systems and scalable APIs. * Experience with AWS, cloud-native architectures, SQL databases, and NoSQL databases. ### Education * No specific education requirement is stated in the original job description. ## Work Arrangement & Schedule * Remote * Location: San Francisco, CA, US * Remote work from anywhere * Full-time status and expected weekly hours are not specified in the original job description. * No specific weekend or schedule-flexibility requirement is stated. ## Compensation & Benefits Compensation is not specified in the original job description. Benefits include: * Vacations and additional PTO * Remote work from anywhere * Economic support for health insurance, internet, and cell phone line * Stock options * Learning and development platform * Multidisciplinary, diverse, and dynamic team * Growth and career path * Opportunity to work on a next-generation payments platform * Startup culture with a high-impact product * Best tools and technology to operate * Multicultural team distributed throughout LATAM ## Compliance / Additional Information DEUNA is proud to be an equal opportunity employer. DEUNA values and celebrates diversity and inclusion in the workplace. All employment decisions are made without discrimination based on nationality, race, ethnicity, religion, gender, sexual orientation, gender identity or expression, marital status, color, disability, or any other characteristic protected by law.