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F2Onsite

IT Full Stack Developer

On site

Vienna, United states

Mid level

Freelance

14-02-2026

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Skills

Communication Leadership Java SQL CI/CD DevOps Test Test Automation Scrum Problem-solving Research Training Architecture Operating Systems Programming SQL Server Software Development Agile Junit Hibernate Maven

Job Specifications

Job Title: IT Full Stack DeveloperPayments Experience

Visa Eligibility: Please confirm if the candidate is legally authorized to work in the United States

Location: Remote ( The contractor can work remotely but must be local to Vienna, VA, for in-person interaction as needed.)

Experience Level: 510 Years

Basic Purpose

To support software development organizational initiatives by designing and implementing new or modifying existing systems/applications.

Responsibilities

Identifies, analyzes, designs, and maintains cost-effective information technology solutions that align with business initiatives and corporate strategies.
Works with customers (business units) to identify business requirements (e.g., needs, objectives, functions, features, input, and output)
Analyzes, defines, and documents requirements for data, workflow, logical processes, hardware, and operating systems environment; interfaces with other systems; internal and external controls; and output.
Documents, diagrams, organizes, and inputs information for inclusion in the database, developing input/output record layouts or program views.
Designs, develops, implements, and maintains systems with support from other ISD areas, team members, and management.
Codes programs, prepares test data, tests, and debugs programs.
Revises and refines programs to account for changes in functional system requirements and equipment configurations.
Troubleshoots and resolves operational problems/system requirements Participates in testing and implementation of systems/applications.
Provides ongoing maintenance of systems/applications.
Maintains and monitors systems/applications after implementation.
Develops and maintains documentation describing program development, logic, coding, testing, changes, and corrections.
Provides technical support to customers.
Participates in training of peers and SQA staff in new or modified systems/applications.

Additional Responsibilities

" Works independently with moderate guidance from higher level staff or management.

" Assists in determining system requirements.

" Applies specific functional knowledge to analyze and resolve moderately complex problems.

" Designs, codes, debugs, and maintains moderately complex computer programs.

" Works on most phases of applications programming activities

" Researches, identifies, and solves straightforward to moderately complex problems.

" Analyzes possible solutions using established procedures.

" Collaborate with software developers and SQA analysts.

" Investigate defects and bugs as they arise.

" Designs and develops test automation scripts using test automation frameworks.

Qualifications And Education Requirements Target

" Demonstrated experience in systems analysis & design, workflow, or procedural analysis.

" Demonstrated experience in application development, including determining, developing, testing, and implementing system requirements and specifications.

" Demonstrated ability to prioritize, plan, and organize tasks.

" Experience using established testing techniques.

" Demonstrated project leadership experience.

" Effective research, analytical, and problem-solving skills

" Effective interpersonal, verbal, and written communication skills

" Ability to work independently, exercise initiative, and use good judgment.

" Ability to work independently and as part of a team

Specific to this position

" A minimum of 5-10 years of distributed application programming experience in one or more of the following technologies: Java, J2EE, service-oriented architecture (SOA), middleware, integration technologies, and frameworks like JSP, JSTL, JMS, JNDI, JDBC, JAXB, Struts, Hibernate, Maven, log4j, and JUnit.

" Solid understanding of Java Web Services WSDL, SOAP, XML, RESTful, and Web Services Development Kit.

" Relational database, preferably DB2, SQL Server, or Oracle.

" Knowledge of Mainframe systems

" Experience with Data Migration and Mapping to Cloud solutions

" Experience with SFTP and Data File Transfers

" Experience with Automated testing frameworks

Desired

" College degree(s) in information technology, computer science or related field or equivalent experience

" Experience with DevOps and Continuous Integration/Continuous Delivery (CI/CD) practices

" Advanced knowledge of financial/banking industry standards, open banking standards, regulations, and practices specifically supporting real-time, near real-time, and batch payment rails

" Advanced knowledge of client products, services, programs, policies, and procedures

" Advanced knowledge and experience working with or implementing compliance applications.

" Experience in cloud development

" Knowledge of scrum or Scaled Agile Framework (SAFe)

" Familiarity with financial industry applications and systems.

" Expert experience/knowledge of software development best practices in accordance with the ITIL or CMMI capability models.

Plus, Skills

" IT Industry Certifications in good standing

" Know

About the Company

F2OnSite is a trusted national leader in IT services, headquartered in Plano, Texas, with regional hubs in Boston, Austin, Charlotte, and Miami. Our purpose, "Connect People and Technology to Unlock Potential and Drive Growth" is a carefully crafted message we adhere to every day. We specialize in 'Labor as a Service', managing expert technicians and engineers for large-scale projects, implementations, and ongoing support across multiple industries including data centers, healthcare, financial services, retail, entertainment... Know more