Freelance Java Backend Developer Jobs in Philadelphia, PA

Job Title: Senior Full-Stack Java Developer - Contract
Role Overview
We are seeking a highly accomplished and technically secure Senior Full-Stack Java Developer to join an enterprise project team on a contract basis. In this senior individual contributor seat, you will take operational ownership of designing, engineering, and maintaining scalable, high-performance web applications.
Moving seamlessly between backend system architecture and modern front-end design, you will collaborate with cross-functional stakeholders to translate complex business logic into efficient technical specifications. The ideal contractor possesses a deep technical toolkit across cloud environments, writes pristine, modular code, and brings a proven history of technical leadership to maintain absolute application performance and reliability.
Key Responsibilities
Backend Engineering & Cloud Architecture
• Scalable Application Design: Architect, build, and sustain advanced, high-availability backend microservices and application layers utilizing Advanced Java frameworks.
• Cloud Infrastructure: Leverage Amazon Web Services (AWS) to deploy, configure, and optimize cloud-native application components, ensuring code is tailored for distributed cloud environments.
• Modular Code Delivery: Write clean, highly efficient, well-documented, and reusable code components following strict object-oriented design patterns and enterprise best practices.
Front-End Integration & Full-Stack Synergy
• Responsive UI Development: Design and engineer complex, single-page client interfaces using Advanced Angular, ensuring robust cross-platform responsiveness and seamless backend API integration.
• Full-Stack Bridging: Own technical outcomes end-to-end, connecting scalable database structures and RESTful APIs directly to client-facing web components.
Technical Leadership & Quality Governance
• Requirement Translation: Analyze complex user requirements and translate them into functional, maintainable, and highly secure technical solutions.
• Code Quality Assurance: Champion high code quality by conducting comprehensive unit testing, system debugging, and active participation in peer code review loops.
• System Optimization: Stay continuously updated on evolving Java and cloud methodologies, proactively recommending and implementing system performance improvements.
• Project Mentorship: Provide technical direction, architectural guidance, and process oversight to project team members, drawing on prior technical leadership experience to keep development velocities aligned with milestones.
Qualifications & Requirements
Minimum Qualifications
• Experience Baseline: Minimum of 6 to 9 years of professional experience in enterprise-grade Java development.
• Leadership Depth: Minimum of 1 to 2 years of experience serving explicitly in a technical lead or project lead capacity.
• Advanced Hard Filters (6-9 Years of Verifiable Depth Required for Each):
oAdvanced Java Mastery: Expert-level capability designing, debugging, and scaling core Java application frameworks.
oAdvanced Angular Fluency: Proven hands-on track record building complex front-end modules, managing application state, and driving user-experience optimizations.
oAdvanced AWS Core: Solid working knowledge of cloud-native computing, storage, deployment automation, and routing within the Amazon Web Services ecosystem.
• Competencies: Exceptional written and verbal communication habits, strong analytical problem-solving skills, and a proven history of operating successfully within fast-paced, collaborative project teams.
Preferred Qualifications
• Prior professional development experience or domain knowledge within the Investment, Wealth Management, Retirement Services, or broader FinTech industries is highly preferred.
Equal Opportunity Employer / Disabled / Protected Veterans
The Know Your Rights poster is available here:
https://www.eeoc.gov/sites/default/files/2023-06/22-088_EEOC_KnowYourRights6.12.pdf
The pay transparency policy is available here:
https://www.dol.gov/sites/dolgov/files/ofccp/pdf/pay-transp_%20English_formattedESQA508c.pdf
For temporary assignments lasting 13 weeks or longer, AllSTEM Connections is pleased to offer major medical, dental, vision, 401k and any statutory sick pay where required.
We are committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation for any part of the employment process, please contact your staffing representative who will reach out to our HR team.
AllSTEM Connections participates in the E-Verify program in certain locations as required by law. Learn more about the E-Verify program.
https://e-verify.uscis.gov/web/media/resourcesContents/E-Verify_Participation_Poster_ES.pdf
We also consider for employment qualified applicants regardless of criminal histories, consistent with legal requirements, including, if applicable, the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance. Pursuant to applicable state and municipal Fair Chance Laws and Ordinances, we will consider for employment-qualified applicants with arrest and conviction records, including, if applicable, the San Francisco Fair Chance Ordinance. For Los Angeles, CA applicants: Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.
Additional Skills
(none specified)
AllSTEM Representative Contact Info
Account Executive:
Nichols
Branch Phone:
(909) 244-1777
Location:
Ontario, CA