Senior Full Stack Developer (Geospatial Experience Required)

Senior Full Stack Engineer (GIS Specialist) About the Role Expression is seeking an exceptional Senior Full Stack Engineer with deep expertise in Geographic Information Systems (GIS) to join our innovative team. As a technical leader, you'll architect and develop sophisticated spatial data applications that solve complex geographic challenges while working alongside world-class data scientists, DevSecOps engineers, and product designers. Impact You'll Make Architect and develop cutting-edge web-based mapping applications that transform complex spatial data into intuitive user experiences Lead the technical direction of feature-focused teams while mentoring junior developers Drive innovation in our geospatial technology stack through thoughtful architecture decisions and implementation Collaborate with cross-functional teams to deliver robust, scalable solutions that delight our customers Technical Expertise Required GIS & Spatial Technologies Expert knowledge of GIS platforms including ArcGIS, QGIS, and OpenLayers Deep understanding of spatial data formats (shapefiles, GeoJSON, GeoTIFF) and analysis techniques Experience with geospatial projections, coordinate systems, and spatial indexing Proven track record building interactive mapping applications Full Stack Development Advanced proficiency in Python, JavaScript, and C# Deep expertise in React (or Angular 2/Vue.js) for frontend development Strong command of Express.js and GraphQL/REST APIs Experience with modern ORMs and database technologies including PostgreSQL, Redis, ElasticSearch/OpenSearch, MongoDB Extensive AWS cloud platform experience, particularly with S3 and spatial services Mastery of Git version control and collaborative development workflows Leadership & Communication Proven ability to mentor junior developers and drive technical excellence Outstanding written and verbal communication skills Experience leading code reviews and maintaining high engineering standards Track record of successful collaboration with cross-functional teams Requirements Ability to obtain Secret clearance or higher Associates degree or higher in Computer Science, Engineering, or related field 10 years of software engineering experience 7 years of recent full-stack development experience Demonstrated experience with big data visualization Located in or willing to relocate to the DMV area (Washington DC, Maryland, Virginia) Work Location Hybrid work environment (approximately 3 days per week on-site) in the DMV area Compensation & Benefits Salary $140,000 - $200,000 annually, based on experience, locality pay, and work arrangement Comprehensive Benefits Package Competitive 401(k) with employer matching Premium health coverage (PPO and HDHP options) Medical, dental, and vision insurance Professional development support Education reimbursement program Training and certification opportunities Work-life balance Generous PTO and holiday schedule Flexible work arrangements Additional perks Complimentary life insurance On-site gym access Commuter benefits plan About Expression: Founded in 1997 and headquartered in Washington DC, Expression provides data fusion, data analytics, 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. Equal Opportunity Employer/Veterans/Disabled