**Description** Provides development engineering and programming support to projects and infrastructure support activities. Designs and develops enterprise applications in a Web environment. Develops, creates, and modifies general computer applications software or specialized utility programs. Analyzes user needs and develops software solutions. Designs software or customizes software for client use with the aim of optimizing operational efficiency. May analyze and design databases within an application area, working individually or coordinating database development as part of a team. May manage websites including design, develop, deploy and maintain activities as well as performs testing and quality assurance of web sites and web applications. Coverts project specification and statements of problems and procedures to detailed logical flow charts for coding into computer language. Develops and writes computer programs to store, locate, and retrieve specific documents, data, and information. Analyzes functional business applications and design specifications for functional activities. Develops codes, tests, and debugs new software or enhancements to existing software. Performs maintenance on existing software products and contributes knowledge of business applications. Writes programs according to specifications needed. Provides technical support in the evaluation of prime object names, data elements, and other objects. Ensures that proposed object definitions are clear, concise, technically correct, and that they represent singular concepts. Ensures that the proposed objects are consistent with data and process models. Works with the technical staff to understand problems had with software and then resolve them. Resolves customer complaints with the software and responds to suggestions for improvements and enhancements. Develops block diagrams and logic flow charts. Prepares required documentation. Analyzes user interfaces, maintain hardware and software performance tuning, analyze workload and computer usage, maintain interfaces with outside systems, analyze downtimes, analyze proposed system modifications, upgrades and new COTS. Defines the problem, and develops system requirements and program specifications, from which programmers prepare detailed flow charts, programs, and tests. Coordinates closely with programmers to ensure proper implementation of program and system specifications. Develops, in conjunction with functional users, system alternative solutions. Candidate needs knowledge of Public Key Infrastructure and understand key concepts like digital certificates, Certificate Authorities (CAs), Registration Authorities (RAs), key management practices, cryptographic algorithms, certificate revocation procedures, trust models, and how to design a robust system to issue, manage, and revoke digital certificates while ensuring the integrity and authenticity of users and entities within a network. Duties and Responsibilities: + Design and develop tools for the MS Windows and relevant operating system platforms + Design and develop tools that integrate with commercial applications + Design and develop database management systems, image processing, collaborative tools, data manipulation techniques, data visualization techniques, and directory services + Provide database architectural and design capabilities + Develop unit and functional test plan + Provide the operations and maintenance of operational systems + Modify existing software to correct errors, allow it to adapt to new hardware, or to improve its performance + Analyze user needs and software requirements to determine feasibility of design within time and cost restraints + Consult with customers about software system design and maintenance + Coordinate software system installation and monitor equipment functioning to ensure specifications are met Design, develop, and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequence of design + Develop and direct software system testing and validation procedures, programming, and documentation + Confer with systems analysts, engineers, programmers and others to obtain information on project limitations and capabilities, performance requirements and interfaces + Correct errors by making appropriate changes and then recheck the program to ensure that the desired results are produced + Conduct trial runs of program and software applications to be sure they will produce the desired information and that the instructions are correct + Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instruction so others can understand the program + Write, update, and maintain computer programs or software packages to handle specific jobs, such as tracking inventory, storing or receiving data, or controlling other equipment + Consult with managerial, engineering, and technical personnel to clarify program intent, identify problems, and suggest changes + Perform or direct revision, repair, or expansion of existing programs to increase operating efficiency or adapt to new requirements + Written, analyze, review, and rewrite programs, using workflow chart and diagram, and applying knowledge of computer capabilities, subject matter, and symbolic logic + Write or contribute to instructions or manuals to guide end users + Investigate whether networks, workstations, the central processing unit of the system, or peripheral equipment are responding to a program’s instructions + Prepare detailed workflow charts and diagrams that describe input, output, and logical operational, and convert them into a series of instructions coded in a computer language + Consult with and assist computer operators or system analysts to define and resolve problems in running computer programs + Assign, coordinate, and review work and activities of programming personnel + Collaborate with computer manufacturers and users to develop new programming methods + Train subordinates in programming and program coding + Designs, Develops, and Maintains applications within the cloud environment. This can be for new applications development or the transition of legacy applications to the cloud environment. **Required Quals** + Active TS/SCI with Polygraph + Bachelor's degree and 8+ years' experience. Additional experience in lieu of degree. + Metadata management software – ALL fusion Erwin data Modeler; Data Modeling Software; IBM Rational Data Architect; Visual paradigm DM Visual ARCHITECT + Object or component oriented development software – Microsoft Visual C#.NET; Practical extraction and reporting language Perl; Sun Microsystems Java; Sybase Power Builder. + Program testing software — Defect tracking software; Mercury Interactive LoadRunner; Source code editor software; Usability testing software + Web platform development software — Apache Struts; Hypertext markup language HTML; JavaScript; Ruby on Rails **Original Posting:** March 4, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. **Pay Range:** Pay Range $104,650.00 - $189,175.00 The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. REQNUMBER: R-00154756 All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.