Full Stack Software Engineer

Kastle Systems; Falls Church (VA); On-site; USD 85,000 - 115,000; Full time

Benefits offered by this job

Medical/Dental/Vision

401K

Tuition/Training Assistance

Wellness Program

Job summary

Kastle Systems in Falls Church, VA is seeking a Full Stack Software Engineer to enhance our internal tools. You will engage across various technologies and contribute to a platform servicing clients with a focus on safety and convenience.

The ideal candidate has 3-5 years of experience in C#, HTML, CSS, and JavaScript, and should be comfortable working independently in a fast-paced environment. We offer excellent benefits and recognize our commitment to DE&I.

Qualifications

• 3–5 years of application development using C#.
• 3–5 years front-end development experience with HTML, CSS, and JavaScript.
• Experience with relational databases (preferably SQL Server).

Responsibilities

• Support and expand Kastle’s internal applications.
• Provide internal integration support for Kastle’s APIs.
• Problem-solve issues and improve systems.

Skills

C#

HTML

CSS

JavaScript

SQL

Agile problem-solving

Education

Bachelor’s Degree in Computer Science or similar field

Tools

PHP

Python

Kubernetes

Job description

Overview

Kastle Systems is looking for a Full Stack Software Engineer to join our team in Falls Church, VA to help us grow and support our internal tools. You will contribute to our award-winning, highly available and distributed platform that runs on microcontrollers, headless Linux IoT controllers, datacenters, and the AWS and Azure clouds. Our products keep people safe while adding convenience and providing excellent customer service to building managers and enterprise customers that use our Security‑As‑A‑Service platform.

• Kastle Systems has won numerous awards for its products, including the SDM Integrator of the Year and various new product of the year awards.

The successful candidate will be one who is looking to make a big impact. This position will play a hands‑on role in building and supporting the internal Kastle toolset that is used 24/7 by Kastle operations staff to provide the highest level quality of service and support to our customers. It is perfect for someone who enjoys being exposed to a variety of technologies up and down the stack, including database, application, and front‑end layers.

We provide excellent benefits (Medical/Dental/Vision, 401K, Tuition/Training Assistance, BrightHorizons Lifestyle Assistance, Wellness Program, etc.). We are a Certified Great Place to Work with awards for being a Top Work Place with Top DE&I Practices!

Responsibilities

• Support and expand Kastle’s internal applications, generally written in PHP, C#, and JavaScript.
• Provide internal integration support for Kastle’s APIs.
• Support the relational database (SQL Server) through procedure reviews and performance analysis.
• Problem‑solve issues and help to develop and improve systems to meet business needs.
• Work with QA to maintain adequate test coverage of Kastle’s applications and business rules.
• May be required to take part in on‑call rotations.

Qualifications

Required:

• Bachelor’s Degree in Computer Science, Computer Engineering, or a similar field providing a solid foundation in programming.
• 3–5 years of application development using C#.
• 3–5 years of front‑end development using HTML, CSS and JavaScript, with popular libraries and frameworks such as jQuery/Bootstrap, Angular/React, Vue.js, or others.
• 3–5 years of experience working with relational databases (SQL), preferably SQL Server, including performance troubleshooting, stored‑procedure design/review, and data analysis.
• 1–2 years of experience with CI/CD workflows in a cloud container orchestration environment (Kubernetes).
• Ability to problem‑solve in a fast‑paced, agile team environment.
• Ability to work independently with minimal supervision and meet deadlines.
• Excellent written and verbal U.S. English communication skills.

Preferred:

• 1–2 years of experience incorporating AI prompting into the development workflow to maximize development velocity.
• Experience programming in Python and PHP.

Company Overview

The property technology space is growing rapidly, and Kastle is leading the way. We are the leader in managed security, with a track record of introducing innovative technologies that serve more than 460 million square feet of real estate worldwide. Our clients span the commercial and multifamily real estate, education, and construction industries, and we deliver a world‑class customer experience. Kastle’s integrated security solutions—including access control, video, and remote video monitoring—significantly reduce costs and improve the critical 24/7 performance for building owners, developers and tenants.

Equal Opportunity Statement

At Kastle, we believe that diversity makes us stronger—at work and in the world. Kastle Systems International, LLC is an Equal Opportunity / Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, age, protected veteran status, marital status, pregnancy or any other basis protected by applicable federal or state laws.