Senior Software Engineer, Automated Test Systems (Hybrid - Aguadilla, PR)

Prattwhitney; Aguadilla (PR); Hybrid; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks vacation

Generous 401(k) with matches

ESP program

Life and disability insurance

Employee Assistance Plan

Job summary

Collins Aerospace, an RTX business, seeks a Software Engineer in Aguadilla, PR to join an Agile/Scrum team developing a reusable operating environment for automated product testing and hardware‑in‑the‑loop systems.

You will design modular C# software, interface with test fixtures and embedded hardware, and implement test sequences with NI TestStand, collaborating with engineers to meet program goals in a hybrid onsite/remote setup.

Qualifications

• Requires STEM degree with 5 years of related experience or an advanced degree with 3+ years.
• Proficiency with C# and object-oriented design.
• Experience with NI TestStand for test sequences.
• Strong understanding of hardware/software interaction.
• Experience mentoring engineers.
• Proficient English communication.

Responsibilities

• Design and support software for automated test stations used to validate communication systems.
• Develop modular C# applications interfacing with test hardware and embedded systems.
• Implement automated test sequences using NI TestStand with custom modules.
• Program and control electronic test instruments using SCPI.
• Interface with JTAG, I2C and Ethernet-based protocols in tests.
• Collaborate with electrical/RF and systems engineers on integration needs.
• Debug hardware/software interactions and maintain test station docs.
• Provide on-site and remote support for lab environments.

Skills

C# development

OO programming

Visual Studio

NI TestStand

SCPI

JTAG

I2C

Ethernet protocols

English communication

Education

STEM degree

Advanced degree

Tools

LabVIEW

Git

Jira

Job description

Date Posted: 2026-09-29 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 information under this program/contract. Security Clearance: None/Not Required

At RTX, the world’s largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. 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.

We are seeking a Software Engineer to join an Agile/Scrum Development team focused on building and supporting a reusable operating environment for automated product testing and hardware‑in‑the‑loop (HIL) systems. This role involves developing software that interfaces directly with complex test equipment, radio test fixtures, and hardware systems, and enabling automated testing, simulation, and validation of advanced communication systems. 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:

• Work as part of an agile development team designing and supporting software for automated test stations used in the validation of communication systems and mixed‑signal electronic assemblies.
• Develop modular C# software applications, including dynamic libraries, that interface directly with automated test hardware, test fixtures, and embedded systems.
• Implement automated test sequences using NI TestStand and integrate them with custom software modules, test instruments, and communication interfaces.
• Program and control electronic test instruments using SCPI and related command sets.
• Interface with a wide range of communication protocols including JTAG, I2C, and Ethernet‑based methods such as SSH and gRPC.
• Collaborate closely with electrical, RF, and systems engineers to define hardware/software integration requirements, wiring configurations, and station architecture.
• Debug hardware/software interactions, troubleshoot test equipment issues, and support the setup, configuration, and maintenance of test stations.
• Design and maintain documentation, interface specifications, and automated test workflows.
• Provide on‑site and remote support for development labs, including software updates, station upgrades, and issue resolution.

What YOU will learn:

You will learn about our growing engineering team in Puerto Rico; What we do? Who we support? How we work? You will learn the technologies of today and tomorrow which we count on to maintain world leadership in the aerospace industry. You will learn why people enjoy and feel fulfilled by working in our industry.

Qualifications you must have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience
• C# development experience, including class-based design, object‑oriented programming, and dynamic library creation
• Proficiency with Visual Studio and general software debugging methods
• Experience with NI TestStand for test sequence development
• Solid understanding of electrical engineering concepts and hardware interaction
• Experience mentoring or guiding other engineers
• Demonstrated professional experience communicating in English across all levels of an organization (verbal and written)
• U.S. citizenship is required, as only U.S. citizens are authorized to access information under this program/contract.

Qualifications We Prefer:

• Professional experience developing software for automated test systems, ATE environments, or hardware-in-the-loop setups.
• Experience using communication protocols such as JTAG, I2C, and Ethernet‑based methods (SSH, gRPC).
• Ability to interface with test instruments using SCPI.
• Knowledge of LabVIEW for instrument integration or station development.
• Familiarity with hardware debugging tools such as logic analyzers, protocol analyzers, and RF test equipment.
• Experience with development tool sets, for example, Jira, Subversion/Git/Version Management.
• UX design experience, especially for operator‑facing test applications.
• Experience with automated test environments (Python).

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.

WE ARE REDEFINING AEROSPACE.

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

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.