Back to jobs

Senior Android Engineer

Middleburg, VA

Sandboxx is the leading platform dedicated to finding and building technology solutions throughout a service member's military life cycle. We're looking for people with drive and initiative who are excited about making great technology and a positive attitude for our service members.  Come help us build meaningful solutions for the military community!

Senior Android Engineer (AI-Accelerated)

Location: Middleburg, VA

Type: Full-time

Sandboxx is seeking a Senior Android Engineer who thrives in product-focused teams and is passionate about delivering seamless, secure, and delightful mobile experiences. You’ll lead the development of our Android app used by thousands of military families, service members, and veterans—and help shape how we incorporate AI to accelerate our engineering workflow and user experience.

We’re a mission-driven team building products that matter. If you’re motivated by purposeful work, enjoy end-to-end ownership, and have experience leveraging AI coding tools to move faster and build smarter, this role is for you.

What You’ll Do

  • Build and evolve our flagship Android app using Kotlin and modern architecture patterns (MVVM, MVI, Clean Architecture).
  • Translate Figma designs and functional specs into performant, pixel-perfect Android code.
  • Integrate AI-enhanced features to support personalization, intelligent notifications, and natural-language interactions.
  • Use AI coding tools (e.g., GitHub Copilot, Cursor) to streamline development, testing, and debugging workflows.
  • Collaborate across product, design, and backend engineering to ship fast and learn faster.
  • Maintain a high-quality codebase with well-structured tests and automated pipelines.
  • Participate in code reviews, pair programming, and mentorship to elevate the team.
  • Monitor performance and crashes, and iterate quickly on improvements.

About You

  • 5+ years of experience building production Android apps at scale, ideally in high-growth environments.
  • Deep fluency with Kotlin and the Android SDK. Bonus points for experience with Jetpack Compose.
  • Hands-on experience using AI-assisted development tools in your workflow.
  • Strong foundation in Android Architecture Components (ViewModel, Room, Navigation, Lifecycle).
  • Comfortable with asynchronous programming using Kotlin Coroutines and Flow.
  • Experience integrating REST APIs and working with GraphQL is a plus.
  • Prior experience deploying features via CI/CD pipelines (e.g., GitHub Actions, Bitrise, CircleCI).
  • Passion for clean code, maintainable systems, and delightful UX.
  • Familiarity with data privacy, mobile security best practices, and compliance requirements.
  • Self-directed and proactive—especially in a remote environment.
  • Bonus: Experience with Firebase, Compose Multiplatform, or AI/ML SDKs on-device.

Tech Stack

  • Languages & Frameworks: Kotlin, Jetpack Compose, Android SDK, XML
  • Architecture: MVVM, MVI, Clean Architecture, Dependency Injection (Hilt/Koin)
  • Networking: Retrofit, OkHttp, Apollo GraphQL
  • AI & ML: ML Kit, Firebase ML, OpenAI (ChatGPT), TensorFlow Lite
  • Testing: JUnit, Espresso, MockK, Robolectric
  • CI/CD: GitHub Actions, Bitrise, Fastlane, Gradle
  • Crash & Performance Monitoring: Firebase Crashlytics, Android Profiler, LeakCanary
  • Tooling: GitHub Copilot, Android Studio (Giraffe+), Lint, ktlint, Detekt
  • 3rd Party Libraries: Coil, Lottie, Moshi, Coroutines, Navigation Component

Interview Process

  1. Application Review – Assessed by our hiring manager.
  2. CTO Chat – 30-minute intro focused on team fit and values.
  3. Technical Deep Dive – 1-hour discussion with our Lead Android Engineer.
  4. In-depth Coding Session – A 4-hour real-world programming exercise focused on architectural thinking, clean code, and testing. Done in a collaborative format.
  5. Virtual Panel Interview – 2 hours with team stakeholders. Includes a real-world Android coding exercise (we’ll share context beforehand).
  6. Offer Stage – If it’s a match, we move fast.

Benefits & Perks

  • Competitive salary + equity options
  • 100% company-paid health, dental, and vision (employee-only plans)
  • 401(k) with company match
  • Unlimited PTO + 11 company holidays + year-end holiday break
  • 12 weeks paid parental leave for all parents
  • $1,500/year learning & development budget
  • $1,000/year wellness stipend
  • Mission-driven team, startup autonomy, and the opportunity to improve lives in the military community

At Sandboxx, we believe technology should serve people—not replace them.

Come help us shape the future of how service members stay connected, informed, and empowered—while building with the tools of tomorrow.

Sandboxx is an equal opportunity employer - if you are a continuous learner who enjoys startups in either tech or military, you'll thrive at Sandboxx.  We are committed to building a diverse and inclusive workforce and take affirmative action to not discriminate based on race, religion, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, sexual orientation, veteran or military status, or any other legally protected characteristics.  This policy applies to all employment practices within our organization, including but not limited to recruiting, hiring, promotion, termination, compensation, benefits, and training.  Sandboxx is committed to providing reasonable accommodations for candidates with disabilities who need assistance during the hiring process. 

To all recruitment agencies: Sandboxx does not accept agency resumes.  Please do not forward resumes to our jobs alias, Sandboxx employees, or any other organization location.  Sandboxx is not responsible for any fees related to unsolicited resumes.  

Create a Job Alert

Interested in building your career at Sandboxx? Get future opportunities sent straight to your email.

Apply for this job

*

indicates a required field

Resume/CV*

Accepted file types: pdf, doc, docx, txt, rtf

Education

Select...
Select...
Select...
Select...

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey. Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

As set forth in Sandboxx’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.

Select...
Select...
Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Select...

Voluntary Self-Identification of Disability

Form CC-305
Page 1 of 1
OMB Control Number 1250-0005
Expires 04/30/2026

Why are you being asked to complete this form?

We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years.

Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

How do you know if you have a disability?

A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to:

  • Alcohol or other substance use disorder (not currently using drugs illegally)
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS
  • Blind or low vision
  • Cancer (past or present)
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or serious difficulty hearing
  • Diabetes
  • Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders
  • Epilepsy or other seizure disorder
  • Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome
  • Intellectual or developmental disability
  • Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD
  • Missing limbs or partially missing limbs
  • Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports
  • Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)
  • Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities
  • Partial or complete paralysis (any cause)
  • Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema
  • Short stature (dwarfism)
  • Traumatic brain injury
Select...

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.