Principal Full Stack Engineer, Architecture & Platform (Hybrid - Aguadilla)

Prattwhitney; Aguadilla (PR); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical insurance

Vacation time

401(k) plan with match

Employee Scholar Program (ESP)

Life insurance

Job summary

Collins Aerospace is seeking a Principal Full Stack Engineer, Architecture & Platform to define and govern frontend architecture across enterprise web platforms at our Aguadilla, PR site. This role focuses on scalable SPA design, architecture governance, and alignment with backend models. Hybrid work schedule: 3 days onsite, 2 remote per manager.

U.S. citizenship required for system access. You will also lead backend API design, design system governance, and mentor senior engineers to drive

Qualifications

• Typically requires STEM degree with 8+ years of experience or an advanced degree with 5+ years of experience.
• U.S. citizenship required for access to sensitive systems.

Responsibilities

• Define frontend architecture standards across enterprise web platforms.
• Architect scalable SPA and federated UI systems and mentor engineers.
• Define backend architectures and APIs, data-access layers, and integrations.
• Govern design systems, reusable components, and UI patterns across programs.
• Lead modernization efforts and align frontend with backend domain models.

Skills

Frontend architecture

Backend APIs

Design systems

Scalability

Technical leadership

Education

STEM degree + 8+ years

Advanced degree + 5+ years

Tools

JavaScript/TypeScript

React/Angular/Vue

CI/CD

Java/Python/Node.js

AI/ML in UI

Cloud-native

Job description

Date Posted: 2026-09-09 Country: United States of America Location: US-PR-AGUADILLA-110 ~ Rd 110 N Km 28.8 ~ RD110 Position Role Type: Hybrid U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship is required, as only U.S. citizens are authorized to access certain necessary systems. Security Clearance: None/Not Required Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense.

In this Principal Full Stack Engineer, Architecture & Platform role, you will define and govern frontend architecture across enterprise web platforms. You will establish architectural standards, design systems, and scalable UI engineering strategies. This position will sit at our Aguadilla, PR location. You must be residing in Puerto Rico at the time of starting employment. Relocation is not offered. This role is categorized as hybrid, with 3 days onsite and 2 days remote following the schedule assigned by the Manager.

What YOU will do:

• 1. Enterprise Frontend Architecture Define frontend architecture standards across programs. Architect scalable SPA and distributed UI systems. Establish domain-driven UI structuring. Design micro-frontend or federated architecture where applicable. Lead framework and technology selection decisions.
• 2. Backend Development & Architecture Define and drive scalable, resilient backend architecture and services for enterprise platforms. Lead the design and development of APIs, business services, data-access layers, and integrations across distributed systems. Establish backend engineering standards, architectural patterns, security, performance, and reliability practices while mentoring engineers and driving technical decisions.
• 3. Design System & Pattern Governance Define reusable enterprise component platforms. Institutionalize architectural patterns: Layered UI architecture Event-driven UI orchestration State isolation strategies Middleware patterns Prevent architectural drift across teams.
• 4. Scalability & Advanced UI Systems Establish clear performance budgets and enforce monitoring standards. Architect frontend systems to support: High concurrency, Real-time streaming data, Complex, multi-step workflows. Progressive, adaptive user experiences
• 5. Technical Leadership Mentor senior engineers. Drive modernization (legacy to modular architecture). Influence frontend engineering hiring standards. Align frontend architecture with backend domain models.

Qualifications you must have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) unless prohibited by local laws/regulations and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience Demonstrated professional experience communicating in English (verbal and written).
• U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract.
• Frontend engineering experience.
• Experience architecting enterprise-scale web systems.

Qualifications We Prefer:

• JavaScript & TypeScript React / Angular / Vue ecosystems
• Frontend architectural patterns experience
• Scalable state orchestration
• OOP and system design.
• Exposure to CI/CD governance.
• Backend architecture familiarity (Java, Python, Node.js).
• Experience integrating AI/ML capabilities into UI workflows.
• Mobile/hybrid architecture exposure.
• Cloud-native deployment awareness.
• Exposure to systems engineering concepts

What We Offer Some of our competitive benefits package includes:

• Medical, dental, and vision insurance
• Three weeks of vacation for newly hired employees
• Generous 401(k) plan that includes employer matching funds
• Participation in the Employee Scholar Program (ESP)
• Life insurance and disability coverage
• Employee Assistance Plan, including up to 8 free counseling sessions.
• And more!

Collins Aerospace, an RTX business, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market. Join our growing engineering team in Puerto Rico, where you will provide critical support to all Collins SBUs, working on exciting programs and projects ranging from the development of the next generation of advanced concept ejection seats to the latest technologies for the U.S. warfighter.

Hybrid: Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader.

Please consider the following role type definition as you apply for this role.

At Collins, the paths we pave together lead to limitless possibility. And the bonds we form - with our customers and with each other - propel us all higher, again and again.

WE ARE REDEFINING AEROSPACE.

RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.