Full Stack Developer
Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Jul 17, 2026.
Expression is seeking a Full Stack Developer to build applications that help people work with complex data and workflows. You will work across the user interface, APIs, and back-end services, partnering with developers, designers, and customer stakeholders to turn real needs into software that is useful, reliable, and easy to navigate.
We are looking for someone who enjoys understanding how a system works from end to end. You should be comfortable taking ownership of a feature, asking questions when requirements are unclear, and working through problems with your team. Strong technical skills matter, and so do curiosity, clear communication, and a willingness to keep learning as the technology and our customers’ needs evolve.
Clearance: Active Secret clearance or higher is required.
Key Responsibilities
- Build responsive web interfaces using React, JavaScript, and TypeScript.
- Develop and maintain Node.js services and APIs that support application features and integrations.
- Work with relational and document databases to store, retrieve, and present data effectively.
- Collaborate with teammates and customer stakeholders to understand user needs, clarify requirements, and shape solutions.
- Own features through design, development, testing, deployment, and ongoing improvement.
- Write maintainable code, participate in code reviews, and share approaches that help the team grow.
- Investigate defects and performance issues, identify root causes, and implement reliable fixes.
- Document technical decisions and communicate progress, tradeoffs, and risks clearly.
- Stay curious about new tools and practices, and apply them when they make the product or development process better.
Required Qualifications
- An associate degree or higher in computer science, engineering, or a related field.
- At least five years of software engineering experience, including three years of recent full stack development experience with React, JavaScript, TypeScript, and Node.js.
- Experience developing applications in AWS or Microsoft Azure.
- Experience working with databases such as PostgreSQL, MongoDB, or MySQL.
- Understanding of object-oriented programming principles and API development.
- Experience using Git, including branching and merging.
- Proficiency with the Linux or Unix command line.
- Ability to troubleshoot across the full stack, communicate findings clearly, and collaborate constructively with others.
Preferred Qualifications
- Experience with Elasticsearch.
- Experience with Vue or Angular.
- Experience with Google Cloud Platform or multiple cloud environments.
- Very comfortable using AI to create efficiencies in your workflows.
What Success Looks Like
You learn how customers use the application, deliver features that solve their problems, and make the software easier to maintain as it grows. You work through unfamiliar challenges with curiosity, bring others into decisions when their perspective helps, and leave the codebase and team stronger than you found them.
Benefits:
Expression offers competitive salaries and benefits, such as:
- 401k matching
- PPO and HDHP medical/dental/vision insurance
- Education reimbursement
- Complimentary life insurance
- Generous PTO and holiday leave
- Onsite office gym access
- Commuter Benefits Plan
About Expression:
Founded in 1997 and headquartered in Washington DC, Expression provides data fusion, data analytics, AI/ML, software engineering, information technology, and electromagnetic spectrum management solutions to the U.S. Department of Defense, Department of State, and national security community. Expression’s culture focuses on creating immediate and sustainable value for our clients via agile delivery of tailored solutions built through constant engagement with our clients. Expression was ranked #1 on the Washington Technology 2018's Fast 50 list of fastest-growing small business Government contractors and a Top 20 Big Data Solutions Provider by CIO Review.
We make sure to provide everyone with the tools and opportunities to grow while working on some of the newest technologies in the industry. We get excited about celebrating our professionals' milestones, accomplishments, promotions, overcoming challenges, and many other aspects that make an engaging collaborative environment.
Equal Opportunity Employer/Veterans/Disabled
Expression is an Equal Opportunity Employer. If you require a reasonable accommodation during the application or interview process, please submit your request to our Human Resources department through the application portal.