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Nadya, PostgreSQL Developer

Last Job: 24 Jul 2024

- 10+ years in Forecasting, Analytics & Math Modelling - 8 years in Business Analytics and Economic Processes Modelling - 5 years in Financial Forecasting Systems - 5 years in Data Science - 3 years in Web Development - Master of Statistics and Probability Theory (diploma with honours), PhD (ABD) - BSc in Finance - Strong knowledge of Math & Statistics - Strong knowledge of R, Python, VBA - Strong knowledge of PostgreSQL and MS SQL Server - Knowledge of C# - Knowledge of .net web development technologies - Basic web technologies (JavaScript) - Self-motivated, conscientious, accountable, addicted to data processing, analysis & forecasting

PostgreSQL

PostgreSQL

Data Analysis

Data Analysis   10 yr.

Python

Python

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Ihor K, PostgreSQL Developer

Last Job: 3 Jun 2024
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- Data Engineer with a Ph.D. degree in Measurement methods, Master of industrial automation - 16+ years experience with data-driven projects - Strong background in statistics, machine learning, AI, and predictive modeling of big data sets. - AWS Certified Data Analytics. AWS Certified Cloud Practitioner. - Experience in ETL operations and data curation - PostgreSQL, SQL, Microsoft SQL, MySQL, Snowflake - Big Data Fundamentals via PySpark, Google Cloud, AWS. - Python, Scala, C#, C++ - Skills and knowledge to design and build analytics reports, from data preparation to visualization in BI systems.

PostgreSQL

PostgreSQL

AWS big data services

AWS big data services

AWS Quicksight

AWS Quicksight

Python

Python

Apache Kafka

Apache Kafka

ETL

ETL

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Henry A., PostgreSQL Developer

$30/hr
Last Job: 2 Aug 2024
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Language Verified
Programming Skills Verified
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- 9+ years experience working with Python; - 3+ years of experience with AI/ML projects; - 5 years of experience with PowerBI and 4 years of experience with Tableau and other visualization tools like Spotfire; - Good skills with Vaex, and Dask; - Was a part of a financial debt management project; - 6 years of experience working with MySQL, SQL, and PostgreSQL; - 8 years of experience with various data sets (ETL, Data Engineer, Data Quality Engineer); - 3 years of experience with Amazon Web Services (AWS), Google Cloud Platform (GCP); - Proven commercial experience in HR and related Talent projects; - Extensive experience with Spark and Hadoop; - Background with TensorFlow, Scikit-learn and PyTorch; - Data Analytics/Engineering with Cloud Service Providers (AWS, GCP); - Deep abilities working with Kubernetes (K8s); - Hands-on scripting experience with Python; Microsoft Power BI, Tableau, Sisense, CI/CD principles, Data Validation, Data QA, SQL, Pipelines, ETL, and Automated web scraping; - Pet web3 projects (solidity, wallet integration); - Upper-intermediate English.

PostgreSQL

PostgreSQL

Python

Python   9 yr.

Data Analysis

Data Analysis   6 yr.

SQL

SQL   6 yr.

Microsoft Power BI

Microsoft Power BI   5 yr.

NoSQL

NoSQL   5 yr.

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Taras K., PostgreSQL Developer

Last Job: 24 Jul 2024

- Software Engineer with over two decades of experience, specializing in system design, and system integration (System Design, Technical Leadership, System Integration, Scalability, Security, Communication, Documentation) - More than 20+ years of experience with Delphi, Deep knowledge with different versions of Delphi to 10.2; - Experience with various localisations and Delphi UIs; - Expert in various programming languages including C++, JavaScript, and Python; - Experienced in database management with Oracle, MySQL, and PostgreSQL among others (Data Modeling Database Management, Normalization and Denormalization, Data Integrity, Data Warehousing, ETL, SQL and Query Optimization, Database Design, Stored Routines and Packages, Data Backup and Recovery, Data Migration, Web Scraping). - A record of technical leadership in various domains such as enterprise software, finance, and healthcare.

PostgreSQL

PostgreSQL

Delphi

Delphi   20 yr.

C++

C++

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Oleg K., PostgreSQL Developer

Last Job: 24 Jul 2024

Software Engineer with proficiency in data engineering, specializing in backend development and data processing. Accrued expertise in building and maintaining scalable data systems using technologies such as Scala, Akka, SBT, ScalaTest, Elasticsearch, RabbitMQ, Kubernetes, and cloud platforms like AWS and Google Cloud. Holds a solid foundation in computer science with a Master's degree in Software Engineering, ongoing Ph.D. studies, and advanced certifications. Demonstrates strong proficiency in English, underpinned by international experience. Adept at incorporating CI/CD practices, contributing to all stages of the software development lifecycle. Track record of enhancing querying capabilities through native language text processing and executing complex CI/CD pipelines. Distinguished by technical agility, consistently delivering improvements in processing flows and back-end systems.

PostgreSQL

PostgreSQL

Scala

Scala

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Table of Contents

How and where is PostgreSQL used?

How and where
Case NameCase Description
1. UberUber, the ride-hailing giant, uses PostgreSQL to manage its massive amounts of data. PostgreSQL’s scalability and robustness allow Uber to handle millions of transactions daily, ensuring reliable and efficient service for its users.
2. InstagramInstagram, the popular photo-sharing platform, relies on PostgreSQL to power its backend infrastructure. The database’s flexibility and support for complex queries enable Instagram to handle the vast amount of user-generated content and deliver a seamless experience to its millions of users.
3. CiscoCisco, a leading networking and telecommunications company, utilizes PostgreSQL for various purposes, including managing customer data, monitoring network devices, and analyzing network performance. PostgreSQL’s reliability and advanced features make it a preferred choice for handling critical network infrastructure.
4. FujitsuFujitsu, a global IT services provider, leverages PostgreSQL for its cloud-based solutions. The database’s compatibility with various operating systems and its support for high availability and scalability allow Fujitsu to deliver robust and reliable cloud services to its customers.
5. TwitchTwitch, the popular live streaming platform for gamers, relies on PostgreSQL to handle real-time chat interactions between millions of users. PostgreSQL’s support for concurrent transactions and efficient indexing enables Twitch to provide reliable and responsive chat functionality during live streams.
6. SkypeSkype, the widely used communication platform, utilizes PostgreSQL to store user profiles, chat history, and call records. PostgreSQL’s data integrity features and support for complex queries ensure that Skype’s users can access their data securely and quickly.
7. AppleApple, the technology giant, utilizes PostgreSQL for various purposes, including managing user data, product inventory, and handling online transactions. PostgreSQL’s stability, security, and support for geospatial data make it a suitable choice for managing Apple’s vast ecosystem of products and services.
8. Sony Interactive EntertainmentSony Interactive Entertainment, the company behind PlayStation gaming consoles, relies on PostgreSQL for managing player profiles, game statistics, and online multiplayer functionalities. PostgreSQL’s performance and robustness ensure a seamless gaming experience for millions of PlayStation users worldwide.
9. RedditReddit, the popular online community and discussion platform, uses PostgreSQL to store and retrieve vast amounts of user-generated content. PostgreSQL’s support for full-text search and its ability to handle high read and write workloads make it an ideal choice for powering Reddit’s extensive database of posts and comments.

What are top PostgreSQL instruments and tools?

Instruments and tools
  • pgAdmin: pgAdmin is a comprehensive administration and development platform for PostgreSQL. It provides a user-friendly interface to manage databases, execute queries, and monitor server activity. pgAdmin has been actively developed since 1996 and is widely used by developers and database administrators.
  • PostgreSQL Studio: PostgreSQL Studio is a web-based administration tool that allows users to manage and interact with PostgreSQL databases through a browser interface. It offers features such as query execution, schema management, and data visualization. PostgreSQL Studio was first released in 2005 and has gained popularity among developers for its simplicity and ease of use.
  • DataGrip: DataGrip is a powerful IDE for databases that supports PostgreSQL along with other popular database management systems. It offers advanced features like intelligent code completion, database exploration, and query profiling. DataGrip is known for its seamless integration with version control systems and is widely used by developers for database development and administration tasks.
  • pgBadger: pgBadger is a PostgreSQL log analyzer that helps in understanding and optimizing database performance. It generates detailed reports from PostgreSQL log files, highlighting slow queries, resource utilization, and other performance metrics. pgBadger is particularly useful for identifying and resolving performance bottlenecks in PostgreSQL databases.
  • PostGIS: PostGIS is a spatial database extender for PostgreSQL that adds support for geographic objects and spatial operations. It enables the storage, retrieval, and analysis of geospatial data within a PostgreSQL database. PostGIS has been actively developed since 2001 and is widely used in various domains, including geospatial applications, mapping, and location-based services.
  • pgBouncer: pgBouncer is a lightweight connection pooler for PostgreSQL. It helps in managing database connections efficiently and reduces the overhead of establishing new connections for each client. pgBouncer improves the scalability and performance of PostgreSQL by reusing connections and optimizing resource usage.
  • Barman: Barman is a backup and recovery manager for PostgreSQL. It provides a simple yet powerful solution for managing database backups, including full and incremental backups, point-in-time recovery, and continuous archiving. Barman ensures data protection and disaster recovery for PostgreSQL databases.

Pros & cons of PostgreSQL

Pros & cons

9 Pros of PostgreSQL

  • 1. Performance: PostgreSQL is known for its excellent performance, especially when handling complex queries and large amounts of data. It offers various optimization techniques, such as indexing, query optimization, and parallel query execution, leading to efficient and speedy data retrieval.
  • 2. Extensibility: PostgreSQL provides a rich set of data types, functions, and extensions, allowing developers to customize and extend the functionality of the database. This flexibility enables the creation of advanced applications and supports various data types, including JSON, arrays, and spatial data.
  • 3. ACID Compliance: PostgreSQL follows the ACID (Atomicity, Consistency, Isolation, Durability) principles, ensuring data integrity and reliability. It guarantees that transactions are processed reliably, and data remains consistent even in the event of system failures.
  • 4. Scalability: PostgreSQL is designed to handle high workloads and can scale vertically by utilizing powerful hardware resources. It also supports horizontal scalability through features like table partitioning and replication, allowing the database to handle increasing data volumes and user concurrency.
  • 5. Advanced Features: PostgreSQL offers advanced features such as full-text search, geospatial support, and support for complex data structures like arrays and JSON. These features enable developers to build robust applications that can efficiently handle diverse data types and search requirements.
  • 6. Community Support: PostgreSQL has a vibrant and active community of developers and users who contribute to its development and provide support through forums, mailing lists, and user groups. This community-driven approach ensures continuous improvement, regular updates, and timely bug fixes.
  • 7. Security: PostgreSQL has a strong focus on security and provides various mechanisms to protect data. It supports authentication methods like SSL/TLS, LDAP, and Kerberos, and offers features such as role-based access control (RBAC), row-level security, and encryption options to ensure data confidentiality and integrity.
  • 8. Cross-Platform Compatibility: PostgreSQL is available for multiple operating systems, including Linux, Windows, macOS, and various Unix-based systems. This cross-platform compatibility allows developers to deploy their applications on different environments without significant modifications.
  • 9. Cost-Effective: PostgreSQL is an open-source database, meaning it is free to use and has no licensing costs. This makes it an attractive option for businesses looking to reduce their expenses without compromising on performance, reliability, or security.

9 Cons of PostgreSQL

  • 1. Complexity: PostgreSQL can be more complex to set up and configure compared to some other databases. It requires a certain level of expertise to optimize performance, fine-tune configurations, and manage advanced features effectively.
  • 2. Memory Consumption: PostgreSQL’s memory usage can be relatively higher compared to some other databases, especially when handling large datasets. This can impact the overall system resources and require careful monitoring and resource allocation.
  • 3. GUI Tools: While PostgreSQL has command-line tools and some graphical user interface (GUI) tools available, the selection might be limited compared to other databases. This can make certain administrative tasks less intuitive for users who prefer GUI-based management.
  • 4. Replication Complexity: Although PostgreSQL supports replication, setting up and managing replication configurations can be more complex compared to some other databases. It may require additional effort and expertise to ensure replication is properly configured and maintained.
  • 5. Learning Curve: For developers who are new to PostgreSQL, there can be a learning curve to understand its unique features, syntax, and best practices. However, with proper documentation and resources, this learning curve can be overcome.
  • 6. Limited Commercial Support: While there are companies that offer commercial support for PostgreSQL, the availability of such services might be more limited compared to some other popular databases. This can be a consideration for organizations requiring extensive commercial support options.
  • 7. Index Maintenance: PostgreSQL’s automatic index maintenance might not be as efficient as some other databases, leading to potential performance issues when dealing with frequent data modifications. Manual intervention might be required to optimize index usage in certain scenarios.
  • 8. Upgrades: Upgrading PostgreSQL to a new version can require careful planning and testing, especially for production environments. It is important to ensure compatibility with existing applications and thoroughly test the upgrade process to avoid any potential issues.
  • 9. Market Share: While PostgreSQL has gained popularity and has a strong user base, it may not have the same market share or widespread adoption as some other commercial databases. This can impact the availability of third-party tools, integrations, and expertise specific to PostgreSQL.

TOP 10 PostgreSQL Related Technologies

Related Technologies
  • Python

    Python is one of the most popular languages for PostgreSQL software development. It offers a wide range of libraries and frameworks, making it easy to connect to databases, execute queries, and manipulate data. Its simplicity and readability make it a favorite among developers.

  • Java

    Java is another widely used language for PostgreSQL development. It is known for its scalability and cross-platform compatibility. With its strong community support and vast number of frameworks, Java offers a robust environment for building PostgreSQL applications.

  • Node.js

    Node.js is a JavaScript runtime that enables server-side development. It provides an asynchronous, event-driven architecture that is well-suited for handling database operations in PostgreSQL. Its lightweight nature and non-blocking I/O make it a popular choice for building scalable and high-performance applications.

  • SQLAlchemy

    SQLAlchemy is a powerful ORM (Object-Relational Mapping) tool for Python. It simplifies database access and manipulation by providing a high-level API. It supports PostgreSQL as one of its backends, making it a popular choice among Python developers.

  • Express.js

    Express.js is a popular web application framework for Node.js. It provides a minimalistic and flexible approach to building web applications. With its support for PostgreSQL, Express.js allows developers to easily integrate databases into their applications.

  • Spring Framework

    The Spring Framework is a widely used Java framework for building enterprise applications. It provides extensive support for database access, including PostgreSQL. With its modular design and comprehensive feature set, Spring Framework simplifies the development of PostgreSQL applications.

  • Ruby on Rails

    Ruby on Rails is a popular web application framework written in Ruby. It follows the MVC (Model-View-Controller) pattern and offers seamless integration with PostgreSQL. Its convention-over-configuration approach allows developers to focus on writing business logic rather than boilerplate code.

Hard skills of a PostgreSQL Developer

Hard skills

Hard skills of a PostgreSQL Developer:

Junior

  • SQL: Proficient in writing SQL queries and understanding database design principles.
  • PostgreSQL Administration: Basic knowledge of setting up and managing PostgreSQL databases.
  • Performance Tuning: Familiarity with optimizing query performance and indexing strategies.
  • Data Modeling: Ability to design and implement database schemas.
  • Backup and Recovery: Understanding of backup and recovery procedures in PostgreSQL.

Middle

  • Advanced SQL: Expertise in writing complex SQL queries and optimizing them for performance.
  • PostgreSQL Replication: Knowledge of setting up and configuring replication in PostgreSQL.
  • Query Optimization: Proficiency in analyzing query plans and optimizing database performance.
  • High Availability: Experience with implementing high availability solutions using PostgreSQL.
  • Schema Design: Ability to design and implement efficient and scalable database schemas.
  • Data Migration: Familiarity with migrating data from other databases to PostgreSQL.
  • Security: Understanding of PostgreSQL security features and best practices.

Senior

  • Database Sharding: Expertise in implementing sharding techniques for horizontal scaling.
  • Advanced Replication: Knowledge of advanced replication scenarios and troubleshooting.
  • Performance Monitoring: Experience with monitoring and tuning PostgreSQL performance.
  • Disaster Recovery: Proficiency in designing and implementing disaster recovery strategies.
  • Advanced Security: Deep understanding of PostgreSQL security mechanisms and encryption.
  • Query Optimization: Ability to optimize complex queries and tune database performance.
  • Partitioning: Experience with partitioning large tables for improved performance.
  • Database Migration: Expertise in migrating large-scale databases to PostgreSQL.

Expert/Team Lead

  • PostgreSQL Internals: In-depth knowledge of PostgreSQL internals and architecture.
  • Cluster Management: Experience with managing PostgreSQL clusters in production environments.
  • Performance Scaling: Proficiency in scaling PostgreSQL databases for high traffic loads.
  • Database Design: Ability to design and implement complex database solutions.
  • Advanced Troubleshooting: Expertise in diagnosing and resolving complex PostgreSQL issues.
  • Automation: Experience with automating database management tasks using scripts and tools.
  • Data Warehousing: Familiarity with designing and implementing data warehousing solutions.
  • Database Security: Deep understanding of database security best practices and compliance.
  • Team Leadership: Ability to lead a team of PostgreSQL developers and provide technical guidance.
  • Code Review: Proficiency in reviewing and optimizing SQL code written by other developers.
  • Training and Mentoring: Experience in training and mentoring junior PostgreSQL developers.

TOP 12 Tech facts and history of creation and versions about PostgreSQL Development

Facts and history
  • PostgreSQL is an open-source object-relational database management system (ORDBMS) known for its robustness, reliability, and extensive feature set.
  • It was initially developed at the University of California, Berkeley in the 1980s as a successor to the Ingres database system.
  • Michael Stonebraker, along with a team of researchers, is credited with the creation of PostgreSQL.
  • PostgreSQL’s development methodology emphasizes correctness, standards compliance, and extensibility.
  • The first version of PostgreSQL, then known as Postgres, was released in 1989.
  • PostgreSQL introduced the concept of MVCC (Multiversion Concurrency Control), allowing for concurrent access to the database without locking.
  • In 1996, the project was renamed PostgreSQL to better reflect its SQL support.
  • PostgreSQL supports a wide range of data types, including geometric, network address, and JSON.
  • PostgreSQL has built-in support for full-text search, allowing users to efficiently search for text within documents.
  • PostgreSQL has a strong focus on extensibility, providing a robust framework for creating custom data types, operators, and functions.
  • PostgreSQL has an active and vibrant community of developers and users who contribute to its ongoing development and improvement.
  • PostgreSQL is released under the PostgreSQL License, which is a permissive open-source license that allows for both commercial and non-commercial use.

Soft skills of a PostgreSQL Developer

Soft skills

Soft skills are essential for a PostgreSQL developer to effectively communicate, collaborate, and excel in their role. Here are the soft skills required at different levels:

Junior

  • Problem-solving: Ability to identify and resolve issues efficiently to ensure smooth database operations.
  • Attention to detail: Paying close attention to database design, query optimization, and data integrity.
  • Time management: Efficiently managing tasks and meeting deadlines to deliver projects on time.
  • Teamwork: Collaborating with team members to achieve common goals and contribute to a positive work environment.
  • Adaptability: Being open to learning new technologies, tools, and techniques to stay updated in the dynamic field of database development.

Middle

  • Analytical thinking: Ability to analyze complex data structures and optimize queries for better performance.
  • Communication: Clearly conveying ideas, requirements, and technical concepts to both technical and non-technical stakeholders.
  • Leadership: Taking ownership of tasks, guiding junior developers, and contributing to the success of the team.
  • Collaboration: Working effectively with cross-functional teams, such as application developers, testers, and project managers.
  • Problem-solving: Identifying root causes of issues, proposing viable solutions, and implementing them efficiently.
  • Documentation: Creating comprehensive documentation to facilitate knowledge sharing and maintain database integrity.
  • Customer focus: Understanding and addressing the needs of end-users to deliver solutions that meet their requirements.

Senior

  • Mentoring: Providing guidance, support, and knowledge transfer to junior and mid-level developers.
  • Strategic thinking: Contributing to long-term database architecture and design decisions to align with business goals.
  • Project management: Leading and managing database-related projects, including planning, resource allocation, and risk management.
  • Conflict resolution: Effectively resolving conflicts and fostering a positive and collaborative work environment.
  • Innovation: Identifying opportunities for process improvement, automation, and optimization within the database environment.
  • Technical expertise: Deep knowledge and expertise in PostgreSQL and related technologies, as well as emerging trends in database development.
  • Decision-making: Making informed decisions based on data analysis, industry best practices, and business requirements.
  • Client management: Building and maintaining strong relationships with clients, understanding their needs, and providing appropriate solutions.

Expert/Team Lead

  • Strategic leadership: Guiding the overall direction and strategy of the database team and aligning it with the organization’s goals.
  • Resource management: Optimally allocating resources, including personnel, hardware, and software, to ensure efficient database operations.
  • Enterprise-level thinking: Understanding the impact of database decisions on the entire organization and making choices that benefit the business as a whole.
  • Stakeholder management: Building and maintaining relationships with key stakeholders, such as executives, department heads, and project managers.
  • Influence and negotiation: Persuading and negotiating with stakeholders to gain support for database-related initiatives and projects.
  • Continuous learning: Staying updated with the latest advancements in database technologies and sharing knowledge with the team.
  • Risk management: Identifying and mitigating potential risks and vulnerabilities in the database environment.
  • Performance optimization: Optimizing database performance through advanced techniques, such as indexing, partitioning, and query tuning.
  • In-depth expertise: Demonstrating mastery in PostgreSQL and related technologies, including advanced features and complex database operations.
  • Business acumen: Understanding the business objectives, market dynamics, and industry trends to make informed decisions and drive innovation.
  • Strategic partnerships: Building partnerships with technology vendors, industry experts, and research institutions to leverage cutting-edge solutions and knowledge.

Cases when PostgreSQL does not work

Does not work
  1. Insufficient hardware resources: PostgreSQL may not work efficiently if the hardware resources, such as CPU, memory, and storage, are insufficient for the workload. This can lead to slow query performance, high latency, and system crashes.
  2. Network connectivity issues: If there are network connectivity issues between the PostgreSQL server and the clients, it can result in intermittent connection failures or slow response times. This can be caused by network misconfigurations, firewall restrictions, or network congestion.
  3. Software compatibility conflicts: PostgreSQL may encounter compatibility issues when interacting with certain software components or operating systems. For example, if the PostgreSQL version is not compatible with the host operating system, it can lead to instability or unexpected behavior.
  4. Inadequate database design: Poorly designed databases can negatively impact PostgreSQL’s performance. Issues such as lack of proper indexing, redundant or inefficient queries, and improper data modeling can lead to slower query execution and increased resource usage.
  5. Concurrency and locking conflicts: In highly concurrent environments, where multiple users or applications are accessing the database simultaneously, PostgreSQL may experience locking conflicts. This can result in contention for resources and can cause delays or even deadlocks.
  6. Insufficient database maintenance: PostgreSQL requires regular maintenance tasks, such as vacuuming and analyzing, to optimize performance and reclaim disk space. If these maintenance tasks are not performed regularly, the database can become bloated, leading to degraded performance and increased storage requirements.
  7. Hardware or storage failures: Like any other system, PostgreSQL is susceptible to hardware or storage failures. If the underlying hardware or storage devices fail, it can lead to data corruption or loss, rendering PostgreSQL inoperable.

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