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TEST - Evgeniy K., Java Developer

Last Updated: 15 Nov 2023

- Software engineer with 5+ years of experience in Java development. - Strong knowledge in programming with expertise in Spring Framework, Hibernate, and Java Core. - Proficient in using Design patterns and applying logical thinking to problem-solving. - Highly responsible and self-learning individual. - Skilled in Java technologies such as JDBC, Maven, JUnit, J2EE, JSP, and Tomcat. - Experience in working with databases like MySQL and PostgreSQL. - Familiarity with development methodologies like SCRUM and TDD.

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JDBC   5 yr.


React   5 yr.


Symfony   5 yr.


Solidity   10 yr.


Elixir   10 yr.


Dmytro R, Data Engineer

Kharkiv, Ukraine
Last Updated: 3 Nov 2023

- 5 years of experience as a Data Engineer; - Proficient in Java, Python, JavaScript, and Bash scripting; - Experienced in working with databases such as MSSQL, MySQL, Postgresql, MongoDB, Oracle, DynamoDB, and Redshift; - Skilled in using IDEs like Eclipse and IntelliJ IDEA; - Knowledgeable in Maven, Servlets API, OOP, design patterns, JDBC, Hibernate, JPA, log4j, Git, SVN, Spring core, Spring MVC, Springboot, Hadoop, Spark, JSON, boto3, SQL Alchemy, spark, Pyspark, AWS lambda, AWS CLI, Jenkins, Kafka, jetty, REST; - Has experience in various domains including data engineering, backend web development, and software development; - Holds certifications in AWS machine learning and problem-solving; - English: Upper-intermediate.

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JDBC   5 yr.


Python   5 yr.

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Mykyta G., Java Developer

Last Updated: 16 Aug 2023

- 4+ years of experience in developing applications using Java and related technologies. - Good knowledge in programming JDBC, Hibernate. - Experience in using Design patterns. - Good logical thinking, self-learning, high level of responsibility. - Hard-working, result-oriented, creative and communicative, team player. - Upper-Intermediate English. - Availability starting from 18.09.2023

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Dmytro N., Java Engineer

Kropivnitskiy, Ukraine
Last Updated: 15 Aug 2023

- 5 years of experience in developing applications using Java. - Good knowledge of programming JDBC, and Hibernate. - Experience in using Design patterns. - Good logical thinking, self-learning, high level of responsibility. - Responsible, hard-working, result-oriented, creative, communicative, and team player. - Intermediate+ English. - Availability starting from ASAP

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Maksim, Blockchain Software Engineer

Last Updated: 13 Nov 2023

- Software Engineer with 5 years of experience in building web applications and expertise in blockchain, DeFi, NFT, and tokenization domains. - Proficient in programming languages such as Solidity, Node.js, Python, and Java. - Experienced in back-end development using technologies like Spring, Hibernate, and JDBC. - Skilled in working with blockchain technologies including Ethereum, ERC721, ERC1155, and EIP712. - Familiar with CI/CD tools like Jenkins and containerization platforms like Kubernetes and Docker. - Strong knowledge of database management systems like PostgreSQL, MySQL, and MongoDB. - Well-versed in agile methodologies like Scrum and Kanban, with a solution-oriented approach to project objectives.

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JDBC   1 yr.


TypeScript   2 yr.


Java   5 yr.


Node.js   1 yr.


Solidity   3 yr.

Ethereum blockchain (ETH)

Ethereum blockchain (ETH)   3 yr.

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AI tools and expert human reviewers in the vetting process are combined with a track record and historically collected feedback from clients and teammates. On average, we save over 50 hours for client teams in interviewing JDBC candidates for each job position. We are fueled by a passion for technical expertise, drawn from our deep understanding of the industry.

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Our journey starts with a 30-minute discovery call to explore your project challenges, technical needs, and team diversity. Meet Carefully Matched JDBC Talents. Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person. Validate Your Choice. Bring a new JDBC developer on board with a trial period to confirm that you’ve hired the right one. There are no termination fees or hidden costs.

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Upstaff Managers conduct an introductory round with potential candidates to assess their soft skills. Additionally, the talent’s hard skills are evaluated through testing or verification by a qualified developer during a technical interview. The Upstaff Staffing Platform stores data on past and present JDBC candidates. Upstaff managers also assess talent and facilitate rapid work and scalability, offering clients valuable insights into their talent pipeline. Additionally, we have a matching system within the platform that operates in real-time, facilitating efficient pairing of candidates with suitable positions.

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Table of Contents

TOP 15 Facts about JDBC

  • JDBC stands for Java Database Connectivity. It is an API (Application Programming Interface) that allows Java programs to interact with databases.
  • JDBC provides a standard set of classes and interfaces for accessing and manipulating databases, regardless of the specific database management system (DBMS) being used.
  • JDBC is a part of the Java Standard Edition (Java SE) platform, making it widely available and supported across various operating systems.
  • JDBC follows a driver-based architecture, where different types of drivers are used to connect Java applications to different databases.
  • There are four types of JDBC drivers: Type 1 (JDBC-ODBC Bridge), Type 2 (Native-API Driver), Type 3 (Network Protocol Driver), and Type 4 (Thin Driver).
  • JDBC provides methods for establishing database connections, executing SQL statements, retrieving and updating data, and managing transactions.
  • With JDBC, developers can write database-independent code, allowing their applications to be easily ported across different databases without major modifications.
  • JDBC supports both simple and complex SQL queries, including parameterized queries, stored procedures, and batch updates.
  • JDBC supports both synchronous and asynchronous database operations, allowing developers to choose the appropriate approach based on their application requirements.
  • JDBC provides various mechanisms for handling database errors and exceptions, ensuring robustness and reliability in database interactions.
  • Since its introduction in 1997, JDBC has become a popular choice for Java developers when it comes to integrating their applications with databases.
  • JDBC is regularly updated and maintained by Oracle Corporation, ensuring compatibility with the latest Java versions and addressing any security or performance issues.
  • Many popular Java frameworks and libraries, such as Hibernate and Spring, build on top of JDBC to provide higher-level abstractions and simplify database interactions.
  • JDBC is widely supported by major database vendors, including Oracle, MySQL, Microsoft SQL Server, PostgreSQL, and IBM DB2.
  • JDBC can be used in a variety of Java applications, ranging from small desktop applications to large-scale enterprise systems.

Soft skills of a JDBC Developer

Soft skills are essential for a JDBC Developer as they complement technical expertise and contribute to overall job performance and success in the workplace.


  • Communication: Ability to effectively communicate with team members, stakeholders, and clients to understand requirements and convey information.
  • Teamwork: Willingness to collaborate with others, share knowledge, and contribute to a positive team environment.
  • Problem Solving: Capacity to analyze issues, identify potential solutions, and implement effective problem-solving strategies.
  • Time Management: Ability to prioritize tasks, meet deadlines, and efficiently manage workloads.
  • Attention to Detail: Strong focus on accuracy and precision when working with code, data, and documentation.


  • Leadership: Capability to lead small teams, mentor junior developers, and provide guidance and support.
  • Adaptability: Flexibility to adapt to changing project requirements, technologies, and work environments.
  • Critical Thinking: Aptitude to think critically and make informed decisions based on data and analysis.
  • Client Management: Skill in managing client expectations, addressing concerns, and maintaining positive client relationships.
  • Conflict Resolution: Ability to handle conflicts and disagreements within the team and find mutually beneficial resolutions.
  • Organizational Skills: Proficiency in organizing and prioritizing tasks, resources, and project deliverables.
  • Attention to Performance: Focus on optimizing database performance and identifying areas for improvement.


  • Mentoring: Experience in mentoring and coaching junior and middle-level developers, sharing knowledge and best practices.
  • Strategic Thinking: Capacity to think strategically and align database solutions with organizational goals and objectives.
  • Project Management: Ability to manage complex projects, including planning, resource allocation, and risk management.
  • Client Engagement: Skill in understanding client needs, providing consultancy, and building strong client relationships.
  • Quality Assurance: Commitment to ensuring the quality and integrity of database solutions through rigorous testing and validation.
  • Continuous Learning: Eagerness to stay updated with the latest trends, technologies, and advancements in the field of JDBC development.
  • Innovation: Capacity to think creatively and propose innovative solutions to enhance database performance and functionality.
  • Business Acumen: Understanding of business processes and the ability to align database solutions with business requirements.

Expert/Team Lead

  • Team Leadership: Experience in leading and managing teams, setting project goals, and ensuring successful project delivery.
  • Strategic Planning: Ability to develop long-term strategies for database development, performance optimization, and scalability.
  • Technical Consultancy: Skill in providing technical guidance and consultancy to clients and internal stakeholders.
  • Process Improvement: Capability to identify inefficiencies, develop and implement process improvements to enhance team productivity.
  • Risk Management: Expertise in identifying and mitigating risks associated with database development, security, and performance.
  • Vendor Management: Experience in evaluating and managing relationships with external vendors and service providers.
  • Budgeting and Resource Allocation: Proficiency in budgeting for projects, allocating resources effectively, and managing project finances.
  • Strategic Partnerships: Ability to build strategic partnerships with other teams or organizations to drive synergy and collaboration.
  • Thought Leadership: Recognition as a thought leader in the field of JDBC development, with contributions to industry forums, conferences, and publications.
  • Conflict Management: Skill in effectively managing and resolving conflicts within the team or with external stakeholders.
  • Decision Making: Capacity to make critical decisions based on analysis, data, and consideration of potential impacts.

TOP 10 JDBC Related Technologies

  • Java

    Java is a widely used programming language in the software development industry. It provides a robust platform for building enterprise-level applications. With JDBC, Java developers can easily connect and interact with relational databases.

  • Spring Framework

    Spring is a popular Java framework that simplifies the development process and enhances productivity. It provides excellent support for JDBC integration, allowing developers to seamlessly work with databases using Spring’s powerful JDBC template.

  • Hibernate

    Hibernate is an object-relational mapping (ORM) framework for Java. It simplifies database access by mapping Java objects to database tables. With Hibernate, developers can leverage JDBC to perform efficient database operations without writing complex SQL queries.

  • MySQL

    MySQL is an open-source relational database management system. It is widely used in web applications and provides excellent support for JDBC. MySQL’s JDBC driver allows Java applications to connect and interact with MySQL databases efficiently.

  • Oracle Database

    Oracle Database is a powerful and feature-rich relational database management system. It offers robust JDBC support, enabling Java developers to build high-performance applications that seamlessly integrate with Oracle databases.

  • PostgreSQL

    PostgreSQL is a popular open-source relational database management system known for its advanced features and performance. It offers excellent JDBC support, making it a preferred choice for Java developers working on data-intensive applications.

  • Microsoft SQL Server

    Microsoft SQL Server is a widely used relational database management system in the enterprise market. It offers comprehensive JDBC support, allowing Java developers to build scalable and reliable applications that integrate seamlessly with SQL Server.

What are top JDBC instruments and tools?

  • Apache Derby: Apache Derby is a lightweight, pure Java relational database management system. It was originally developed by IBM and then open-sourced as a project under the Apache Software Foundation. Apache Derby is known for its portability, easy installation, and support for JDBC. It has been widely used in embedded systems and small-scale applications.
  • H2 Database Engine: The H2 Database Engine is a Java-based relational database engine. It is known for its high performance, small footprint, and support for advanced features such as in-memory databases and full-text search. H2 has gained popularity in the Java community due to its ease of use and compatibility with JDBC.
  • MySQL Connector/J: MySQL Connector/J is the official JDBC driver for MySQL databases. It provides a high-performance, native implementation of the JDBC API for connecting Java applications to MySQL databases. MySQL Connector/J has been widely adopted and is used in many production environments.
  • Oracle JDBC Driver: Oracle JDBC Driver is the official JDBC driver for Oracle databases. It offers a comprehensive set of features and optimizations for connecting Java applications to Oracle databases. The Oracle JDBC Driver has a long history and is widely used in enterprise-level applications.
  • PostgreSQL JDBC Driver: The PostgreSQL JDBC Driver is a Type 4 JDBC driver that allows Java applications to connect to PostgreSQL databases. It provides robust support for the latest JDBC standards and features. The PostgreSQL JDBC Driver is known for its stability, performance, and compatibility with PostgreSQL.
  • Microsoft SQL Server JDBC Driver: The Microsoft SQL Server JDBC Driver enables Java applications to connect to Microsoft SQL Server databases. It offers high-performance data access and supports the latest JDBC standards. The Microsoft SQL Server JDBC Driver is widely used in enterprise environments running Microsoft SQL Server.
  • SQLite JDBC Driver: The SQLite JDBC Driver allows Java applications to connect to SQLite databases. SQLite is a self-contained, serverless, and zero-configuration database engine. The SQLite JDBC Driver provides a lightweight and efficient way to interact with SQLite databases using JDBC.
  • IBM Data Server Driver for JDBC and SQLJ: The IBM Data Server Driver for JDBC and SQLJ is a high-performance and robust JDBC driver for connecting Java applications to IBM Db2 databases. It offers advanced features such as connection pooling, statement caching, and distributed transactions. The IBM Data Server Driver is widely used in enterprise applications running on IBM Db2.
  • Amazon Redshift JDBC Driver: The Amazon Redshift JDBC Driver allows Java applications to connect to Amazon Redshift, a fully managed data warehousing service. It provides fast and secure access to Redshift clusters and supports advanced features such as bulk data loading and query execution. The Amazon Redshift JDBC Driver is widely used in data analytics and business intelligence applications.
  • Google Cloud Spanner JDBC Driver: The Google Cloud Spanner JDBC Driver enables Java applications to connect to Google Cloud Spanner, a globally distributed relational database service. It offers high availability, scalability, and strong consistency. The Google Cloud Spanner JDBC Driver provides seamless integration with Java applications running on Google Cloud Platform.

Pros & cons of JDBC

6 Pros of JDBC

  • 1. Platform Independence: JDBC provides a platform-independent way to access databases. It allows developers to write database queries in Java, enabling the application to work on different operating systems and database platforms.
  • 2. Performance: JDBC offers high performance due to its ability to directly interact with the database server. It eliminates the need for intermediate layers or protocols, resulting in faster execution of database operations.
  • 3. Scalability: JDBC supports connection pooling, which allows multiple users to share a set of database connections. This improves scalability by efficiently managing database connections and reducing the overhead of establishing new connections for each user.
  • 4. Security: JDBC provides secure access to databases by supporting various authentication mechanisms and encryption methods. It allows developers to establish secure connections and protect sensitive data from unauthorized access.
  • 5. Flexibility: JDBC offers flexibility by allowing developers to use dynamic SQL queries. This enables the creation of dynamic and customizable database queries based on runtime conditions and user inputs.
  • 6. Community Support: JDBC is widely used and has a large community of developers. This means there are plenty of online resources, forums, and libraries available for support and troubleshooting.

6 Cons of JDBC

  • 1. Boilerplate Code: JDBC requires writing a significant amount of boilerplate code to establish database connections, execute queries, and handle result sets. This can make the code more verbose and increase development time.
  • 2. Database-specific Code: JDBC code can become database-specific, as different databases may have variations in SQL syntax and features. This can make it challenging to switch between database vendors or support multiple databases.
  • 3. Lack of Object-Relational Mapping: JDBC does not provide built-in support for object-relational mapping (ORM), which can make mapping Java objects to database tables more complex and time-consuming.
  • 4. Manual Resource Management: JDBC requires manual management of database resources such as connections, statements, and result sets. This can lead to resource leaks if not handled properly, causing performance issues or even crashes.
  • 5. Limited Error Handling: JDBC’s error handling mechanism is basic, often providing only error codes and messages. Developers need to manually handle exceptions and implement error logging and recovery mechanisms.
  • 6. Steeper Learning Curve: JDBC requires a good understanding of SQL and database concepts. Developers need to learn the JDBC API and its various classes and methods, which can have a steep learning curve for beginners.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior Developer0-2 yearsAssist in the development of software applications, under the guidance of more experienced developers. Contribute to coding, testing, and debugging activities. Collaborate with team members to understand project requirements and deliver solutions.$50,000 – $70,000
Middle Developer2-5 yearsIndependently develop and maintain software applications. Participate in the design and implementation of software modules. Collaborate with cross-functional teams to identify and resolve technical issues. Mentor junior developers and provide guidance.$70,000 – $90,000
Senior Developer5-8 yearsLead the development of complex software systems. Design and architect software solutions. Provide technical guidance to the development team. Collaborate with stakeholders to define project requirements and ensure timely delivery.$90,000 – $120,000
Expert/Team Lead Developer8+ yearsLead a team of developers and oversee project delivery. Define technical strategies and roadmaps. Mentor and coach team members. Collaborate with stakeholders to align development efforts with business goals. Contribute to high-level decision-making processes.$120,000 – $150,000

How and where is JDBC used?

Case NameCase Description
Database ConnectivityJDBC allows developers to establish a connection between Java applications and various databases. It provides a standard interface to connect and interact with databases such as Oracle, MySQL, PostgreSQL, and more. This enables developers to perform tasks like querying, updating, and manipulating data in the database.
Data RetrievalJDBC enables developers to retrieve data from databases using SQL queries. With JDBC, developers can execute SELECT statements to fetch specific data or retrieve entire result sets. This functionality is essential for applications that require accessing and displaying data from databases in a structured manner.
Data ModificationJDBC allows developers to modify data in databases by executing SQL statements like UPDATE, INSERT, and DELETE. This capability is crucial for applications that involve data manipulation, such as updating records, adding new entries, or deleting existing data.
Batch ProcessingJDBC supports batch processing, which enables developers to execute multiple SQL statements as a batch. This can significantly improve performance and efficiency when dealing with large amounts of data. Batch processing reduces the overhead of repeated communication with the database by sending multiple statements in a single request.
Transaction ManagementJDBC provides transaction management capabilities, allowing developers to group multiple database operations into a single transaction. This ensures atomicity, consistency, isolation, and durability (ACID properties) for database transactions. Developers can control the commit and rollback operations, ensuring data integrity and reliability.
Stored Procedure ExecutionJDBC enables developers to execute stored procedures defined in the database. Stored procedures are precompiled database routines that can be invoked from Java applications using JDBC. This allows for modular and efficient code execution, as complex database operations can be encapsulated and reused within the application.
Database MigrationJDBC can be utilized for database migration tasks, such as transferring data from one database to another or upgrading database schemas. Developers can leverage JDBC to extract data from the source database, transform it if necessary, and load it into the target database. This is useful when migrating applications or consolidating data across different database systems.

Cases when JDBC does not work

  1. Unsupported Database: JDBC relies on drivers to connect to different types of databases. However, not all databases have JDBC drivers available. If you are trying to connect to a database that does not have a compatible JDBC driver, JDBC will not work.
  2. Firewall Restrictions: JDBC connections require network access to establish a connection with the database server. If there are firewall restrictions in place that prevent the JDBC connection from reaching the database server, JDBC will not be able to establish a connection.
  3. Incorrect JDBC URL: The JDBC URL specifies the location and properties of the database you are trying to connect to. If the JDBC URL is incorrect or improperly formatted, JDBC will not be able to establish a connection with the database.
  4. Invalid Credentials: JDBC requires valid credentials (username and password) to authenticate and access the database. If the provided credentials are incorrect or do not have the necessary permissions, JDBC will not be able to connect to the database.
  5. Outdated JDBC Driver: JDBC drivers are regularly updated to improve compatibility, performance, and security. If you are using an outdated JDBC driver, it may not work with the latest version of the database or may have compatibility issues with your Java application.
  6. Resource Limitations: JDBC connections require system resources such as memory and network bandwidth. If your system does not have enough available resources to establish and maintain JDBC connections, it may not work properly.
  7. Network Issues: Network connectivity problems such as intermittent connection drops, high latency, or network congestion can affect the reliability of JDBC connections. If there are network issues between your application and the database server, JDBC may not function correctly.

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