Freelance Python Developer Remote Jobs in Rockville, MD

Lead Full-Stack Developer Remote

This role supports a federal client and requires the ability to obtain a public trust clearance. No sponsorship is available.

We are seeking a Lead Full-Stack Developer to support a major federal modernization initiative focused on building secure, scalable, cloud-native applications on AWS. This is a remote, hands-on technical leadership role for someone who can lead architecture, mentor developers, define technical standards, and still contribute directly to full-stack engineering.

What You Will Do:

• Lead and mentor full-stack development teams supporting cloud modernization, product development, and solution architecture initiatives. • Provide hands-on full-stack engineering and architectural oversight for secure, scalable, distributed applications built on AWS. • Design and implement frontend and backend services using Python, JavaScript, Django, Vue.js, REST APIs, microservices, containers, and AWS-native services. • Collaborate with clients, solution architects, product owners, UX designers, business analysts, platform engineers, and development teams to deliver resilient software products that meet functional and non-functional requirements. • Define application architecture standards, development best practices, design patterns, and technical roadmaps across complex modernization projects. • Ensure solutions align with AWS Well-Architected Framework principles, modern CI/CD practices, API-first design, event-driven architecture, and cloud-native engineering standards. • Lead technical decision-making, evaluate design tradeoffs, provide escalation support, and guide implementation across multiple concurrent initiatives. • Support proof-of-concept development, technical demonstrations, proposal efforts, RFP responses, and technical thought leadership.

What You Will Need:

• Ability to obtain a public trust clearance. • No sponsorship available. • Minimum of 8 years of relevant full-stack application development experience, including at least 4 years in technical leadership, architecture, or team lead roles. • Bachelor’s degree required, or 12 years of relevant experience in lieu of a degree. • Strong hands-on experience with Python and JavaScript. • Experience leading or mentoring teams of 5 or more developers. • Experience building frontend and backend services for cloud-native software products. • Django experience preferred; Flask, FastAPI, Falcon, or SQLAlchemy may be considered as alternatives. • Vue.js experience preferred; React, Svelte, or Angular 1.6+ may be considered as alternatives. • Experience with microservices architecture, REST API design, Docker or Kubernetes, serverless computing, and CI/CD for enterprise applications. • Familiarity with AWS SAM and design patterns such as MVC, Circuit Breaker, and Event-Driven Architecture. • Ability to design, build, test, deploy, and architect custom AWS cloud applications. • Strong understanding of Agile and Scaled Agile software delivery practices. • Excellent communication skills, including the ability to explain technical tradeoffs to technical and non-technical stakeholders.

What Would Be Nice to Have:

• AWS Certified Solutions Architect – Professional. • AWS Certified Developer – Associate. • Experience with AWS Lambda, API Gateway, Step Functions, EventBridge, EKS/Kubernetes, RDS PostgreSQL, MongoDB, Redis, Memcached, Elasticsearch, Docker, and modern monitoring/observability tools. • Experience supporting technical proposals, white papers, RFPs/RFIs, or consulting solution architecture efforts. • Experience with performance tuning, capacity planning, and operational resilience for large-scale distributed systems. • Contributions to open-source projects, technical publications, or cloud-native development thought leadership.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

#M- #LI- Ref: #851-Rockville-S1