Sheldon Linker, Developer in Irvine, CA, United States
Sheldon is available for hire
Hire Sheldon

Sheldon Linker

Verified Expert  in Engineering

ISAM Developer

Location
Irvine, CA, United States
Toptal Member Since
July 6, 2020

Dr. Linker从事咨询和合同编程已经有几十年了. He has specialized in database work since 1978. His doctoral work involved AI and knowledge bases. He is also adept at programming servers, client systems, desktop systems, embedded systems, and a number of other types of systems. 谢尔登从事过数据库、编程、业务分析师和项目管理工作. 他目前在马里兰大学在线教授后两门课程.

Data ModelingData AnalysisData ReportingDebuggingData ProfilingData CleansingData CleaningProgrammingData AnalyticsCSQLPL/SQLLinuxWindowsDatabasesWin32BasicJCLCrystal ReportsKornShellKofaxCOBOLPOSIX

Portfolio

University of Maryland
质量保证(QA)，性能调优，Cron, KornShell，写作 & Editing...
Linker Systems, Inc.
验收测试驱动开发(ATDD)、敏捷、分析、分析思维...
Freelance
质量保证(QA)，数据清洗，数据清洗，大数据，Oracle DBA...

Experience

ISAM - 20 yearsC - 20 yearsSQL - 20 yearsPL/SQL - 20 yearsC++ - 18 yearsCrystal - 12 yearsIBM Db2 - 10 yearsC# - 4 years

Availability

Part-time

Preferred Environment

Mainframe, Embedded Systems, Win32, .NET, Windows, Java, C++, Linux, Unix, SQL

The most amazing...

...我参与的项目是战略防御计划——我优化了一个信息传递系统, 允许吞吐量能够取出来袭洲际弹道导弹.

Work Experience

Adjunct Professor

2016 - PRESENT
University of Maryland
  • 教授学生项目管理和涉及需求收集的操作技术, requirements writing, choosing a project methodology, and QA.
  • 帮助编写和改进目前使用的新教科书.
  • 学生成绩和满意度连续3年保持在前10%. As a result, I was awarded a bonus for my efforts.
  • 协助更新软件工程要求课程(swen645).
技术:质量保证(QA)、性能调优、Cron、KornShell、写作 & Editing, Lecturing, Management, Analytical Thinking, Debugging, Code Architecture, Business Analysis, Shell Scripting, Project Management, Unix, Microsoft Excel, Architecture, Technical Instruction, C, Linux, Assembly, Business Intelligence (BI), Reporting, Reports, Software QA, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, Consulting, Agile, Waterfall Methodology, ANSI C, Technical Writing

Programmer | Developer | Designer | Manager

1984 - PRESENT
Linker Systems, Inc.
  • Rescued a number of failing projects through programming, forensics, setting management plans, and occasionally acting as manager.
  • 从开始到结果或从当前状态到结果的几个系统. Performed my role both alone and as a part of a team, on a time-and-expense basis, and sometimes on a fixed-price basis.
  • 为几个客户做过调查，具体情况我不便透露. I also researched for my own company; the patent searches found at USPTO using Inventor=Sheldon And Inventor=Linker.
Technologies: 验收测试驱动开发(ATDD)、敏捷、分析、分析思维, Analytics, ANSI C, ANSI SQL, ANSI X.12, APIs, Architecture, Artificial Intelligence (AI), AS/400, Active Server Pages (ASP), ASPX, Assembly, BASIC, Big Data, BI Reporting, Borland C, Business Analysis, Business Intelligence (BI), Business Logic, Business Process Analysis, Business Rules, API Architecture, C, C#, C++, COBOL, Code Architecture, Column-oriented DBMS, ANSI X12, Complex Data Analysis, Consulting, Cron, Crystal Reports, CSS, CSV File Processing, Dashboards, Data, Data Aggregation, APL, Crystal, Data Analysis, Data Analytics, Data Architecture, Database Analytics, Database Architecture, Database Design, Database Development, Database Management Systems (DBMS), Database Modeling, Database Optimization, Database Performance, Databases, Database Schema Design, Database Table Optimization, Database Transactions, Database Triggers, Data Cleaning, Data Cleansing, Data Engineering, Data Migration, Data Modeling, Data Profiling, Data Quality Analysis, Data Reporting, Data Visualization, Data Warehouse Design, Data Warehousing, DB, Debugging, Embedded C, Embedded C++, Embedded Systems, Enterprise, Enterprise Java Beans (EJB), ETL, ETL Development, ETL Implementation & Design, Excel VBA, Financial Reporting Dashboards, Financial Reporting, Fortran, Google, Hibernate, HTML, IBM Db2, Indexing, ISAM, iSeries, Java, Java Native Interface (JNI), JavaScript, JCL, JSON, Jakarta Server Pages (JSP), Kofax, KornShell, Linux, Machine Learning, Mainframe, Management, Master Data, Microsoft Access, Microsoft Excel, Microsoft SQL Server, Modeling, MySQL, .NET, Node.js, NoSQL, Oracle, Oracle 12c, Oracle PL/SQL, Oracle RDBMS, Oracle SQL, Oracle SQL Data Modeler, Performance Tuning, PHP, PL/I, PL/SQL, POSIX, PostgreSQL, Pro*C, Prolog, Python, Quality Assurance (QA), Relational Database Design, Relational Databases, REST, RPGLE, SQL, SOAP, SDKs, SQL Server Reporting Services (SSRS), SQL Server 2016, SQL Server 2010, SQL Server 2015, SQL Server 2014, SQL Server 2017, SQL Server Integration Services (SSIS), Shell Scripting, SMTP, Service-oriented Architecture (SOA), SSH, SSL, Swing, T-SQL (Transact-SQL), TV, Teradata, Toad, Triggers, UML, User Interface (UI), Unix, UDP, Use Cases, UTF-8, Utilities, UNIX Utilities, Visio, VB, VB.NET, Visual Basic 6 (VB6), Visual Basic .NET (VB.NET), Visual Basic for Applications (VBA), Web, Web UI, Win32, XML, Yacc, z/OS, Data Validation, Technical Writing

Full-stack, Desktop, and Embedded Developer

1984 - PRESENT
Freelance
  • 改进了许多客户端数据库的操作速度和规范化.
  • Simplified the amount of code in use, and the time taken, 通过重写和重构一些客户端应用程序的代码.
  • 改进的系统设计导致更短、更清晰的消息流和业务流程.
  • 从项目开始，从最初的失败点到成功完成，对项目进行管理.
  • 将客户的网站想法从最初的草图带到完成的网站, boxed products, and embedded products.
  • 关闭了许多客户的安全漏洞，包括保险和银行业务.
  • Helped in the transition from one system to another, such as SQL Server to Oracle and DB/2, from Borland C to C#, and from Amiga to Mac, Windows, and SGI.
  • 为各种客户端发现并修复了许多错误.
Technologies: 质量保证(QA)，数据清洗，数据清洗，大数据，Oracle DBA, Enterprise, Performance Tuning, SDKs, Indexing, BI Reporting, ETL Development, Analysis, Business Process Analysis, Business Rules, Business Logic, T-SQL (Transact-SQL), POSIX, Embedded C++, Embedded C, RESTful Development, REST APIs, Data, Analytics, Hibernate, Cron, Pascal, KornShell, Prolog, SSRS Reports, Software QA, ASPX, REST, z/OS, Acceptance Test-driven Development (ATDD), JCL, AS/400, Kofax, Data Visualization, Data Migration, Writing & 编辑，数据库分析，数据工程，api, Oracle 12c, PL/I, ETL实现 & Design, Oracle RDBMS, DB, Column-oriented DBMS, Database Triggers, Stored Procedure, Database Modeling, Management, Yacc, Analytical Thinking, Master Data, Data Aggregation, Reports, Modeling, Debugging, Code Architecture, Complex Data Analysis, Data Quality Analysis, Triggers, Relational Database Services (RDS), Relational Database Design, Relational Data Mapping, Query Optimization, Database Table Optimization, Data Architecture, Database Optimization, Data Analysis, Data Modeling, Reporting, Business Analysis, ISAM, Shell Scripting, SQL Server Reporting Services (SSRS), Python, Node.js, Teradata Databases, Teradata, Test-driven Development (TDD), NoSQL, Visual Basic for Applications (VBA), Project Management, Machine Learning, Data Analytics, Artificial Intelligence (AI), PostgreSQL, MySQL, Visual Basic .NET (VB.NET), Jakarta Server Pages (JSP), Web Architecture, API Architecture, Microsoft Access, Visual Basic, Business Intelligence (BI), Microsoft Excel, Data Warehouse Design, Data Warehousing, PHP, SQL Server Integration Services (SSIS), SQL Server 2014, Microsoft SQL Server, ETL, IBM Db2, Oracle SQL, Oracle, Oracle PL/SQL, SQL Architecture, Database Management Systems (DBMS), SQL Triggers, Database Transactions, Relational Databases, SQL Stored Procedures, Database Architecture, Database Design, Databases, PL/SQL, C, Data Profiling, Data Reporting, JavaScript, HTML, Fortran, CSS, Crystal, COBOL, C#, C++, BASIC, Assembly, Active Server Pages (ASP), APL, Architecture, Financial Reporting Dashboards, Financial Reporting, CSV File Processing, Database Development, Consulting, Oracle SQL Data Modeler, SQL Server 2017, Database Performance, Database Schema Design, Waterfall Methodology, Agile, SQL, Linux, Windows, Unix, .NET, Mainframe, Win32, Borland C, Pro*C, SQL Server 2010, JSON, Swing, ANSI SQL, ANSI C, Data Validation

Programmer | Developer | Designer

2002 - 2020
The PIASC
  • 为了速度和准确性，重新设计了他们的数据库和与数据库的通信.
  • Sped up many of their reports and batch processes, for instance, 把他们的会计工作时间从25小时缩短到不到一个小时.
  • 接管并管理他们的网络项目，使网站上线，并与桌面应用程序完全集成, fixing security flaws in the process.
  • 自动化许多手动功能，以便在编程方面, fewer team members were needed, and on the customer representative side, more time could be spent with customers.
Technologies: .NET, Borland C, C++, C#, Oracle, SQL Server 2017, Windows, HTML, CSS, ASPX, PL/SQL, Kofax, Google, Crystal Reports, Excel VBA, SQL, Data Reporting, Data Profiling, Data Analytics, C, Databases, Database Design, Database Architecture, SQL Stored Procedures, T-SQL (Transact-SQL), Relational Databases, Database Transactions, SQL Triggers, Database Management Systems (DBMS), SQL Architecture, Oracle PL/SQL, Oracle SQL, ETL, Microsoft SQL Server, Data Warehousing, Data Warehouse Design, Microsoft Excel, Business Intelligence (BI), Visual Basic, API Architecture, Web Architecture, Project Management, Visual Basic for Applications (VBA), Business Analysis, Reporting, Data Modeling, Data Analysis, Data Architecture, Database Optimization, Database Table Optimization, Query Optimization, Relational Data Mapping, Relational Database Design, Triggers, Data Quality Analysis, Complex Data Analysis, Code Architecture, Debugging, Modeling, Reports, Data Aggregation, Master Data, Analytical Thinking, Management, Database Modeling, Stored Procedure, Database Triggers, Column-oriented DBMS, DB, Oracle RDBMS, Crystal, ETL Implementation & Design, Oracle 12c, APIs, Data Engineering, Database Analytics, REST, Software QA, Win32, Data, REST APIs, RESTful Development, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, ETL Development, BI Reporting, Performance Tuning, Enterprise, Data Cleansing, Data Cleaning, Quality Assurance (QA), Financial Reporting Dashboards, Financial Reporting, CSV File Processing, Database Development, Consulting, Oracle SQL Data Modeler, Database Performance, Database Schema Design, Agile, Waterfall Methodology, SQL Server 2010, Dashboards, SQL Server 2016, ANSI SQL, ANSI C, ANSI X12, ANSI X.12, Data Validation

Programmer | Developer | Designer

2007 - 2017
Friar Tux Shop
  • 加强网站，并与其他系统整合.
  • 建立一个内部信息网站，帮助库存管理和处理.
  • 增强了内部流程，包括为标签打印机添加专用打印驱动程序.
Technologies: SQL Server 2015, SQL Server Integration Services (SSIS), T-SQL (Transact-SQL), Crystal Reports, HTML, VBScript, Active Server Pages (ASP), Java, SQL, Data Reporting, Data Analytics, C, Windows, Databases, Database Design, Database Architecture, SQL Stored Procedures, Relational Databases, Database Transactions, Database Management Systems (DBMS), SQL Architecture, ETL, JavaScript, SQL Server 2014, Microsoft Excel, Business Intelligence (BI), Visual Basic, Web Architecture, Visual Basic .NET (VB.NET), .NET, Visual Basic for Applications (VBA), SQL Server Reporting Services (SSRS), Business Analysis, Reporting, Data Modeling, Data Analysis, Data Architecture, Query Optimization, Relational Data Mapping, Relational Database Design, Code Architecture, Debugging, Reports, Data Aggregation, Analytical Thinking, Database Modeling, Stored Procedure, Column-oriented DBMS, DB, REST, Software QA, SSRS Reports, Win32, BASIC, Data, REST APIs, RESTful Development, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, BI Reporting, Quality Assurance (QA), Consulting, SQL Server 2017, Waterfall Methodology, SQL Server 2010, ANSI SQL

Programmer

2001 - 2016
Delta Dental Plans Association
  • 通过重新设计算法，将某些过程的速度提高了1600倍, 并通过添加代码来决定给定作业的最佳算法.
  • 增加了一个网站，供雇主管理员工资格.
  • 增加了EDI处理，使系统能够以多种格式读取事务.
  • Enhanced their reporting system, 这样它就可以更快地生成更广泛的报告, 并将复杂的报告生成器上的两页控件替换为一个字段，该字段接受所需内容的英文描述.
Technologies: AS/400, C, Pro*C, RPGLE, iSeries, Crystal Reports, Visual Basic, Java, Windows, Enterprise Java Beans (EJB), Jakarta Server Pages (JSP), XML, Microsoft Access, HTML, JavaScript, Visio, UML, SharePoint, Oracle, Data Reporting, Data Profiling, PL/SQL, Databases, Database Design, Database Architecture, SQL Stored Procedures, Relational Databases, Database Transactions, SQL Triggers, Database Management Systems (DBMS), SQL Architecture, IBM Db2, ETL, Data Warehousing, Data Warehouse Design, Business Intelligence (BI), Web Architecture, Visual Basic .NET (VB.NET), Visual Basic for Applications (VBA), SQL Server Reporting Services (SSRS), Reporting, Data Modeling, Data Analysis, Data Architecture, Database Optimization, Database Table Optimization, Query Optimization, Relational Data Mapping, Relational Database Design, Triggers, Data Quality Analysis, Complex Data Analysis, Code Architecture, Debugging, Modeling, Reports, Data Aggregation, Master Data, Analytical Thinking, Database Modeling, Stored Procedure, Database Triggers, Column-oriented DBMS, DB, Crystal, ETL Implementation & Design, Oracle 12c, APIs, Database Analytics, REST, Mainframe, Software QA, Win32, BASIC, Data, REST APIs, RESTful Development, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, ETL Development, BI Reporting, Performance Tuning, Enterprise, Data Cleansing, Data Cleaning, Quality Assurance (QA), Financial Reporting, CSV File Processing, Database Development, Consulting, Database Performance, Waterfall Methodology, ANSI SQL, ANSI C, ANSI X12, ANSI X.12, Data Validation

Programmer

2006 - 2008
Kofax
  • 将他们的SQL Server T-SQL代码移植到Oracle PL/SQL的所有变体上, 包括让Kofax系统在目标环境中充当DBA的功能.
  • 将他们的SQL Server T-SQL代码移植到IBM的DB/2的所有变体上, 包括让Kofax系统在目标环境中充当DBA的功能.
  • Reengineered their SQL Server T-SQL code, to act much faster, 并完成自己的DBA工作，使数据库结构更快.
Technologies: Visual Basic, C#, .NET, C++, T-SQL (Transact-SQL), SQL Server 2010, Oracle, PL/SQL, Unix, Linux, Windows, z/OS, SQL, Databases, Database Design, Database Architecture, SQL Stored Procedures, Relational Databases, Database Transactions, Database Management Systems (DBMS), SQL Architecture, Oracle PL/SQL, Oracle SQL, IBM Db2, Microsoft SQL Server, SQL Server 2014, Business Intelligence (BI), Database Optimization, Query Optimization, Relational Data Mapping, Data Quality Analysis, Code Architecture, Debugging, Analytical Thinking, Stored Procedure, Column-oriented DBMS, DB, Oracle RDBMS, ETL Implementation & Design, Oracle 12c, Kofax, Mainframe, Software QA, Win32, Data, SDKs, Business Logic, Business Rules, ETL Development, Performance Tuning, Data Cleansing, Data Cleaning, Quality Assurance (QA), Database Development, Database Performance, Agile, Waterfall Methodology, ANSI SQL, Data Validation

QA | Programmer

2006 - 2006
DIRECTV
  • 增加了跳频和压缩相关的功能，以便旧卫星可以不用更换而退役.
  • Found a number of bugs and documented them as a QA tech. 切换到程序员角色，并修复那些尚未修复的问题.
  • 向文件系统添加了扩展名，以便滚动缓冲区文件可以在原始打开的情况下使用, read, write, tell, seek, and close calls.
Technologies: C, C++, Java, Java Native Interface (JNI), XML, Shell Scripting, Linux, HTML, SOAP, UML, Relational Databases, API Architecture, NoSQL, Code Architecture, Debugging, Analytical Thinking, APIs, REST, Software QA, Data, REST APIs, RESTful Development, Business Logic, Business Rules, Quality Assurance (QA), Consulting, ANSI C

Writer

1972 - 1973
Byte Magazine
  • Wrote published articles on software and hardware topics.
  • Republished some of my articles in the best of issues.
  • Responded to letters to the editors' items on occasion.
技术:电子，编程，技术写作

JCB™ English and JCB Robotics

一个可以学习、理解并做出明智决策的知识库和人工智能. 此外，JCB机器人公司可以基于安全或道德理由拒绝命令. This patent can be searched on USPTO.gov.
2008 - 2011

PhD in Computer Science and Software Engineering

Auburn University - Auburn, AL, United States

2006 - 2008

Master of Science Degree in Computer Science

University of Illinois - Springfield, IL, United States

2004 - 2006

理学学士学位，应用科学与技术专业

Thomas Edison State College - Trenton, NJ, United States

1973 - 1977

Coursework in Electrical Engineering

加州大学伯克利分校和美国加州洛杉矶分校

APRIL 2019 - PRESENT

Kofax Capture

Kofax

Libraries/APIs

POSIX, ASPX, Node.js, REST APIs

Tools

Oracle SQL Data Modeler, Borland C, Crystal Reports, Visio, Microsoft Word, JCL, Microsoft Access, Microsoft Excel, Cron, Toad

Languages

APL, Assembly, C, C++, C#, Fortran, HTML, Java, JavaScript, PHP, PL/I, SQL, Crystal, Stored Procedure, Embedded C, Embedded C++, T-SQL (Transact-SQL), ANSI C, Active Server Pages (ASP), Visual Basic, COBOL, CSS, Visual Basic .NET (VB.NET), XML, Pascal, Prolog, Visual Basic for Applications (VBA), Python, BASIC, Excel VBA, VBScript, Pro*C, RPGLE, UML, VB, VB.NET, Visual Basic 6 (VB6)

Paradigms

Management, ETL, Database Design, ETL Implementation & Design, Database Development, Agile, Business Intelligence (BI), API Architecture, Web Architecture, Acceptance Test-driven Development (ATDD), REST, Test-driven Development (TDD), RESTful Development, Service-oriented Architecture (SOA)

Platforms

Linux, Windows, Oracle, AS/400, z/OS，嵌入式Linux, KornShell, Unix, Win32, SharePoint, Web

Storage

IBM Db2, PL/SQL, Databases, Microsoft SQL Server, Database Architecture, Database Modeling, SQL Server 2014, SQL Server Integration Services (SSIS), SQL Stored Procedures, Relational Databases, Database Triggers, Database Transactions, SQL Triggers, Database Management Systems (DBMS), Column-oriented DBMS, SQL Architecture, Oracle PL/SQL, Oracle 12c, Oracle SQL, DB, Oracle RDBMS, SQL Server 2017, Database Performance, SQL Server 2010, SQL Server 2016, ANSI SQL, Data Validation, MySQL, PostgreSQL, JSON, Teradata, Teradata Databases, NoSQL, SQL Server Reporting Services (SSRS), Oracle DBA

Frameworks

Jakarta Server Pages (JSP), Swing, .NET, Hibernate

Industry Expertise

Project Management

Other

Shell Scripting, ISAM, Yacc, Business Analysis, Reporting, Data Modeling, Data Analysis, Data Architecture, Database Optimization, Database Table Optimization, Query Optimization, Relational Data Mapping, Relational Database Design, Relational Database Services (RDS), Triggers, Data Reporting, Data Quality Analysis, Data Analytics, Complex Data Analysis, Code Architecture, Debugging, Modeling, Reports, Data Aggregation, Data Profiling, Master Data, Analytical Thinking, Data, SDKs, Business Logic, Business Rules, Business Process Analysis, Analysis, ETL Development, BI Reporting, Indexing, Performance Tuning, Data Cleansing, Data Cleaning, Architecture, CSV File Processing, Consulting, Database Schema Design, Waterfall Methodology, Technical Instruction, SQL Server 2015, iSeries, Java Native Interface (JNI), Programming, Kofax, Data Migration, Writing & Editing, Lecturing, Data Warehousing, APIs, Data Warehouse Design, Data Engineering, Database Analytics, Data Visualization, Analytics, Enterprise, Big Data, Quality Assurance (QA), Financial Reporting Dashboards, Financial Reporting, SOAP, Dashboards, ANSI X12, ANSI X.12, Enterprise Java Beans (EJB), PDF, Templates, Technical Writing, Software QA, Artificial Intelligence (AI), Machine Learning, Embedded Systems, Mainframe, SSRS Reports, Google, SMTP, SSH, SSL, TV, User Interface (UI), UDP, Use Cases, UTF-8, Utilities, UNIX Utilities, Web UI, Technology, Electronics

Collaboration That Works

How to Work with Toptal

在数小时内，而不是数周或数月，我们的网络将为您直接匹配全球行业专家.

1

Share your needs

在与Toptal领域专家的电话中讨论您的需求并细化您的范围.
2

Choose your talent

在24小时内获得专业匹配人才的简短列表，以进行审查，面试和选择.
3

Start your risk-free talent trial

与你选择的人才一起工作，试用最多两周. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring