Senior Mobile Apps Engineer (Android/iOS) - Onsite Ashburn

Leidos; Ashburn (VA); On-site; USD 107,900 - 195,050; Full time

Job summary

Leidos’ Homeland Sector seeks a Mobile Application Developer to modernize, enhance, operate, and maintain services for DHS/CBP mission critical systems. The role requires hands‑on mobile development across Android and iOS, plus RESTful API development and Java/Node.js expertise. Based in Ashburn, VA, the candidate must work onsite 2 days per week and hold U.S.

citizenship with CBP background eligibility. Ideal candidates have 5+ years in mobile development, experience with Flutter/Dart or

Qualifications

• BS/BA degree with 10 years of relevant experience or Master’s with 8 years, or 4 years additional experience in lieu.
• At least 5 years of Mobile Application Development experience on Android and iOS.
• Experience in Front-end Mobile and Back-end RESTful API development.
• Experience with Java and Node.js.
• Experience with both NoSQL and SQL databases.
• Strong application testing discipline.
• Experience with Google’s Flutter engine and Dart language or a similar Android/iOS framework.
• Excellent problem‑solving skills and communication.
• Proficiency with PostgreSQL, Spring Boot, SQL, Kafka, MySQL, Hibernate, Java, JSF, Swing, JavaScript, Bootstrap, and Angular/React.
• Knowledge of software design patterns.
• Experience with Jira.
• Proficiency with Agile practices, SOA, and modern development practices.
• U.S. Citizen and able to obtain CBP background check.

Responsibilities

• Architect, design, build, deliver, and enhance highly available, scalable real‑time systems.
• Evaluate designs based on customer objectives, timelines, and resource constraints.
• Lead major deliverables through all SDLC phases including scope estimation, architecture, design, coding and unit testing.

Skills

Mobile app development

Android

iOS

RESTful API development

Java

Node.js

PostgreSQL

SQL

Flutter/Dart

Problem solving

Education

BS/BA in CS or related

Master’s degree

Tools

Jira

Spring Boot

Kafka

Hibernate

JSF

Swing

Angular/React

Bootstrap

MySQL

PostgreSQL

Job description

Leidos’ Homeland Sector seeks a Mobile Application Developer to modernize, enhance, operate, and maintain services for DHS/CBP mission critical systems. The role requires hands‑on mobile development across Android and iOS, plus RESTful API development and Java/Node.js expertise. Based in Ashburn, VA, the candidate must work onsite 2 days per week and hold U.S.

citizenship with CBP background eligibility. Ideal candidates have 5+ years in mobile development, experience with Flutter/Dart or