Senior Full-Stack Engineer | Architecture, APIs & Leadership

UKG; Lowell (MA); On-site; USD 120,000 - 180,000; Full time

Job summary

UKG in Lowell, MA is seeking an experienced Senior Software Engineer to contribute across front-end, back-end, and data layers. You will write clean, scalable code in React/TypeScript and Java, design REST APIs, and collaborate with product and UX teams to deliver impactful software.

You will own features end-to-end, implement tests with tools like JUnit and Selenium, and help maintain system health with telemetry and CI/CD practices.

Qualifications

• Bachelor's degree or equivalent practical experience in CS or engineering.
• 6+ years of professional software development experience.
• Strong proficiency in Java, React/TypeScript, and SQL.
• Experience building REST APIs and integrating with front-end apps.
• Experience with SQL and NoSQL databases.
• Knowledge of cloud platforms and DevOps principles.

Responsibilities

• Develop and maintain full-stack applications across front-end, back-end, and data components.
• Lead design reviews and ensure scalable, reliable software.
• Manage feature delivery, priorities, and deadlines.
• Write automated tests (unit, integration, API, E2E).
• Maintain service health using telemetry and proactive monitoring.
• Collaborate with product, UX, and external teams to ensure quality.

Skills

Java

React/TypeScript

SQL

REST APIs

GitHub/Jira

Cloud & DevOps

Education

Bachelor's degree in CS/Engineering or equivalent

Tools

GitHub

Jira

CI/CD tools (Jenkins/TeamCity/GH Actions)

Selenium/Cucumber

Job description

UKG in Lowell, MA is seeking an experienced Senior Software Engineer to contribute across front-end, back-end, and data layers. You will write clean, scalable code in React/TypeScript and Java, design REST APIs, and collaborate with product and UX teams to deliver impactful software.

You will own features end-to-end, implement tests with tools like JUnit and Selenium, and help maintain system health with telemetry and CI/CD practices.