Senior Fullstack Developer Jobs in McLean, VA
Senior Fullstack Developer jobs in McLean, Virginia are concentrated in the Tysons Corner corridor, the Spring Hill and McLean business districts, and the Beltway-adjacent defense and intelligence campuses, with strong demand across government contracting, cybersecurity, and financial technology. Employers hiring right now include Guidehouse, Aktra, and Steampunk. Scan the live roles below and apply to whichever ones fit.
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Showing 5 of 141+ Senior Fullstack Developer jobs
Job Summary
We are seeking a Senior Full Stack Developer – Python with strong experience in Python, PySpark, AWS, and Data Engineering to develop and modernize data-centric applications supporting enterprise and regulatory reporting initiatives. The ideal candidate will have hands-on experience building scalable data solutions, developing batch and real-time pipelines, supporting legacy applications, and modernizing applications within cloud environments. This role requires strong technical problem-solving skills, production support experience, and the ability to collaborate with cross-functional Agile teams.
Key Responsibilities
- Design and develop scalable data solutions using Python, PySpark, Spark, and AWS.
- Build, enhance, and support batch and real-time data pipelines.
- Develop and maintain cloud-based data processing solutions using AWS S3, Glue, EMR, Data Lake, and Delta Lake.
- Modernize legacy applications while maintaining and supporting existing systems.
- Troubleshoot production issues, defects, performance problems, and application enhancements.
- Analyze existing processes and identify opportunities for automation, optimization, and innovation.
- Collaborate closely with Product Owners, Scrum Masters, business stakeholders, and technical teams.
- Evaluate emerging technologies and develop Proofs of Concept (POCs) to support modernization initiatives.
- Participate in Agile ceremonies, technical discussions, code reviews, and SDLC activities.
- Lead and mentor junior developers while providing technical guidance and best practices.
- Work within CI/CD and Agile development environments.
- Support application deployments, production releases, and ongoing system enhancements.
Required Qualifications
- 5+ years of professional software development experience.
- 5+ years of hands-on Python development experience.
- 5+ years of hands-on PySpark / Spark experience.
- 5+ years of Data Engineering experience.
- Strong hands-on experience with AWS, including:
- Amazon S3
- AWS Glue
- Amazon EMR
- AWS Data Lake
- Delta Lake
- Experience working with legacy applications and modernization initiatives.
- 3+ years of SQL experience, including complex queries.
- 3+ years of Unix/Linux experience.
- Strong understanding of SDLC, Agile methodologies, and software development practices.
- Experience providing technical leadership and mentoring junior developers.
- Strong troubleshooting, analytical, and problem-solving skills.
- Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent professional experience.
Preferred Qualifications
- Experience within financial services or mortgage-related environments.
- Experience supporting regulatory reporting applications or data solutions.
- Experience with the Hadoop/Spark ecosystem.
- Experience developing real-time data processing solutions.
- Experience with CI/CD, cloud modernization, and DevOps practices.
- Strong production support and incident troubleshooting experience.
- Experience developing automation solutions and technical POCs.
- Experience working with large-scale enterprise data platforms.
Technical Skills
Primary: Python, PySpark, Apache Spark, Data Engineering, SQL
AWS: S3, Glue, EMR, Data Lake
Data Technologies: Delta Lake, Hadoop, Spark ecosystem, Batch Processing, Real-Time Data Processing
Systems: Unix, Linux, Legacy Application Modernization
Development Practices: SDLC, Agile, CI/CD, Production Support, Automation, POCs
Work Environment
- 100% onsite in McLean, VA
- Candidates must be local to the DMV region.
- Immediate availability preferred.
Why Join Accelyst?
At Accelyst, you will work on modern data and cloud engineering initiatives involving AI, automation, cloud technologies, and enterprise-scale solutions. Our collaborative and agile environment provides opportunities to work with modern technologies while solving complex business and technical challenges.
Job Summary
We are seeking a Senior Full Stack Developer – Python with strong experience in Python, PySpark, AWS, and Data Engineering to develop and modernize data-centric applications supporting enterprise and regulatory reporting initiatives. The ideal candidate will have hands-on experience building scalable data solutions, developing batch and real-time pipelines, supporting legacy applications, and modernizing applications within cloud environments. This role requires strong technical problem-solving skills, production support experience, and the ability to collaborate with cross-functional Agile teams.
Key Responsibilities
- Design and develop scalable data solutions using Python, PySpark, Spark, and AWS.
- Build, enhance, and support batch and real-time data pipelines.
- Develop and maintain cloud-based data processing solutions using AWS S3, Glue, EMR, Data Lake, and Delta Lake.
- Modernize legacy applications while maintaining and supporting existing systems.
- Troubleshoot production issues, defects, performance problems, and application enhancements.
- Analyze existing processes and identify opportunities for automation, optimization, and innovation.
- Collaborate closely with Product Owners, Scrum Masters, business stakeholders, and technical teams.
- Evaluate emerging technologies and develop Proofs of Concept (POCs) to support modernization initiatives.
- Participate in Agile ceremonies, technical discussions, code reviews, and SDLC activities.
- Lead and mentor junior developers while providing technical guidance and best practices.
- Work within CI/CD and Agile development environments.
- Support application deployments, production releases, and ongoing system enhancements.
Required Qualifications
- 5+ years of professional software development experience.
- 5+ years of hands-on Python development experience.
- 5+ years of hands-on PySpark / Spark experience.
- 5+ years of Data Engineering experience.
- Strong hands-on experience with AWS, including:
- Amazon S3
- AWS Glue
- Amazon EMR
- AWS Data Lake
- Delta Lake
- Experience working with legacy applications and modernization initiatives.
- 3+ years of SQL experience, including complex queries.
- 3+ years of Unix/Linux experience.
- Strong understanding of SDLC, Agile methodologies, and software development practices.
- Experience providing technical leadership and mentoring junior developers.
- Strong troubleshooting, analytical, and problem-solving skills.
- Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent professional experience.
Preferred Qualifications
- Experience within financial services or mortgage-related environments.
- Experience supporting regulatory reporting applications or data solutions.
- Experience with the Hadoop/Spark ecosystem.
- Experience developing real-time data processing solutions.
- Experience with CI/CD, cloud modernization, and DevOps practices.
- Strong production support and incident troubleshooting experience.
- Experience developing automation solutions and technical POCs.
- Experience working with large-scale enterprise data platforms.
Technical Skills
Primary: Python, PySpark, Apache Spark, Data Engineering, SQL
AWS: S3, Glue, EMR, Data Lake
Data Technologies: Delta Lake, Hadoop, Spark ecosystem, Batch Processing, Real-Time Data Processing
Systems: Unix, Linux, Legacy Application Modernization
Development Practices: SDLC, Agile, CI/CD, Production Support, Automation, POCs
Work Environment
- 100% onsite in McLean, VA
- Candidates must be local to the DMV region.
- Immediate availability preferred.
Why Join Accelyst?
At Accelyst, you will work on modern data and cloud engineering initiatives involving AI, automation, cloud technologies, and enterprise-scale solutions. Our collaborative and agile environment provides opportunities to work with modern technologies while solving complex business and technical challenges.
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Find JobsSenior Fullstack Developer Job Market in McLean
Who's Hiring
- Guidehouse18
- Aktra12
- Steampunk12
- Booz Allen Hamilton12
- DMI6
Top Industries Hiring
- Technology & Software
Senior Fullstack Developer Jobs in McLean: Frequently Asked Questions
How do I get a senior fullstack developer job in McLean?
The strongest path is targeting McLean's dominant employer types: defense contractors, intelligence-adjacent technology firms, and financial services companies clustered near Tysons Corner and the Beltway. Clearance eligibility is a meaningful edge with many of these employers, even for roles that don't formally require it. Depth in React, Node.js, or cloud-native stacks tailored to enterprise or government environments will differentiate you from generalist candidates competing in this market.
Which companies hire senior fullstack developers in McLean?
Employers hiring senior fullstack developers in McLean right now include Guidehouse, Aktra, and Steampunk, based on current listings on Migrate Mate as of September 2026. McLean's employer base skews toward large defense primes, federal IT consultancies, and financial institutions with headquarters or major operations anchored in the Tysons Corner area.
Are there remote senior fullstack developer jobs in McLean?
Yes, senior fullstack developer roles are among the more remote-compatible positions in tech because the work centers on code, architecture, and asynchronous collaboration rather than physical presence. About 41% of senior fullstack developer openings tied to McLean are remote or hybrid as of September 2026, though clearance-required roles at defense and intelligence contractors typically require on-site or secure-facility work. Client-facing product and commercial technology roles in McLean tend to offer the most remote flexibility.
How can I get a senior fullstack developer job in McLean with little or no experience?
The most realistic entry path in McLean is through the area's large federal IT consultancies and defense contractors, many of which run associate or junior developer programs that feed into senior pipelines. Targeting full-stack or backend support roles at Tysons-area firms, contributing to government-adjacent open-source projects, and pursuing cloud certifications relevant to AWS GovCloud or Azure Government gives candidates a concrete edge in this specific market over generalist applicants.
Which industries hire the most senior fullstack developers in McLean?
Most senior fullstack developer openings in McLean sit in Technology & Software, per current listings on Migrate Mate as of September 2026. McLean's proximity to federal agencies, the intelligence community in nearby Langley, and the Tysons financial corridor makes those sectors the primary engines of local demand for experienced fullstack talent.
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