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Vlad D, Full-Stack Python Software Engineer

Kyiv, Ukraine
Last Updated: 4 Jul 2023
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- Full-Stack (Python + Vue.js) Software Engineer with a background in digital marketing; - Core Python, Flask & Django Frameworks, reusable code - RESTful APIs - MVC, SOLID, DRY principles; - SQL, Django ORM, Elastic Search Platform - Upper-intermediate English; - Available ASAP

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Kamianets-Podilskyi, Ukraine
Last Updated: 5 Apr 2024
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- 4 years of experience in the IT industry as a Python Engineer - Proficient in using technologies such as Django DRF, Flask, Pandas, BeautifulSoup, SQLAlchemy, Asyncio, Flask + Marshmallow, Apscheduler, Jinja, Quip API, Docker, Nginx, Amazon MWS API, Amazon SP-API, Google API, and Telegram API; - Strong in refactoring, bug-fixing, and working with Python, JavaScript, Django, Django Rest Framework; - Skilled in developing faceted search and matching algorithms using ElasticSearch; - Experienced in PDF generation and importing from various formats; - Developed web applications, API interfaces, and automated scripts for data transformation; - Previous experience includes working as a Python developer focused on data scraping for Amazon, eBay, and Walmart products in dropshipping projects; - Also worked as a C# developer on various projects, specializing in web development, scraping, and parsing data; - Upper-Intermediate English; - Available ASAP

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Aser K., Python Software Engineer

Last Updated: 18 Aug 2023

- Python Developer with 5+ years - Deployed to Heroku an HR variability analysis app built with Django/Python, DRF, Celery & RabbitMQ, and PostgreSQL - Automated tests for CI/CD workflows Python, Kubernetes, GitLab CI/CD, AWS Cloud - Native English - Upper-intermediate French - Available ASAP

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Vitalii, Senior Python Developer

Last Updated: 4 Jul 2023

- 10+ years of experience as a software developer. - Upper-Intermediate English. - Available ASAP.

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Elgin C., Python Developer

Last Updated: 4 Jul 2023

- Experience with Python of 5 years - Profoundund understanding of web applications and back-end development - Upper-intermediate English - Available ASAP

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If you urgently need a verified and qualified Celery developer, and resources for finding the right candidate are lacking, UPSTAFF is exactly the service you need. We approach the selection of Celery developers professionally, tailored precisely to your needs. From placing the call to the completion of your task by a qualified developer, only a few days will pass.

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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 Celery 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 Celery 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 Celery developer on board with a trial period to confirm that you’ve hired the right one. There are no termination fees or hidden costs.

How does Upstaff vet remote Celery engineers? Arrow

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 Celery 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

How and where is Celery used?

Case NameCase Description
Task Queuing and Distributed ProcessingCelery allows for efficient task queuing and distributed processing, making it ideal for handling large workloads and scaling applications. It enables the execution of tasks asynchronously, freeing up resources and improving overall system performance.
Scheduled Jobs and Periodic TasksCelery provides a robust scheduling mechanism for executing tasks at specific intervals or time-based triggers. This feature is particularly useful for automating repetitive tasks, such as generating reports, sending notifications, or performing regular data updates.
Real-time Data ProcessingWith Celery, developers can process and analyze real-time data streams efficiently. It can handle high volumes of incoming data, making it suitable for applications that require real-time analytics, monitoring, or data processing, such as social media sentiment analysis or stock market data processing.
Image and Video ProcessingCelery can be utilized for image and video processing tasks, such as resizing, cropping, filtering, or transcoding. By offloading these computationally intensive tasks to Celery workers, applications can remain responsive and provide a seamless user experience.
Parallel Processing and Parallel Task ExecutionCelery supports parallel processing, allowing tasks to be executed concurrently across multiple workers. This feature enables developers to optimize performance by distributing workload across available resources, reducing processing time and improving overall efficiency.
Long-Running Tasks and Background ProcessingCelery is well-suited for handling long-running tasks and background processing. It enables developers to offload resource-intensive tasks to separate worker processes, ensuring that the main application remains responsive and can continue serving user requests.
Error Handling and Retry MechanismsCelery provides built-in error handling and retry mechanisms, allowing tasks to be retried in case of failures or exceptions. This feature enhances the reliability and fault tolerance of applications, ensuring that critical tasks are successfully completed even in the presence of transient errors.
Distributed Task Chains and WorkflowsCelery supports the creation of complex task chains and workflows, where multiple tasks can be executed sequentially or in parallel, with dependencies between them. This functionality enables the development of sophisticated application logic, orchestrating the execution of tasks in a distributed and efficient manner.

Soft skills of a Celery Developer

Soft skills are crucial for a Celery Developer as they contribute to their overall effectiveness and success in their role. These skills enable developers to communicate, collaborate, and solve problems efficiently, making them valuable assets in any development team.


  • Effective Communication: Able to articulate ideas clearly and concisely to team members and stakeholders.
  • Adaptability: Willingness to learn and adapt to new technologies and processes.
  • Problem-solving: Ability to identify and resolve issues in a timely manner.
  • Teamwork: Collaborates effectively with other team members to achieve project goals.
  • Time Management: Able to prioritize tasks and meet deadlines.


  • Leadership: Demonstrates leadership skills by guiding and mentoring junior developers.
  • Critical Thinking: Analyzes complex problems and develops innovative solutions.
  • Conflict Resolution: Effectively resolves conflicts and promotes a positive team environment.
  • Project Management: Manages projects efficiently, ensuring timely delivery and meeting client expectations.
  • Empathy: Understands and empathizes with the needs and concerns of team members and stakeholders.
  • Continuous Learning: Actively seeks opportunities to expand knowledge and stay updated with industry trends.
  • Attention to Detail: Pays meticulous attention to detail to ensure high-quality deliverables.


  • Strategic Thinking: Develops long-term plans and strategies to achieve project and organizational goals.
  • Client Management: Builds strong relationships with clients and provides excellent customer service.
  • Influence and Persuasion: Able to influence and persuade stakeholders to adopt new ideas and approaches.
  • Cross-functional Collaboration: Collaborates effectively with teams from different departments to achieve common objectives.
  • Conflict Management: Resolves conflicts and manages disagreements among team members and stakeholders.
  • Decision-making: Makes informed and timely decisions based on thorough analysis and evaluation.
  • Resilience: Remains resilient in the face of challenges and adapts quickly to changing circumstances.
  • Strategic Planning: Develops and executes strategic plans to drive business growth and innovation.

Expert/Team Lead

  • Visionary Leadership: Inspires and motivates team members, setting a clear vision for the project.
  • Technical Mentorship: Provides guidance and mentorship to junior and mid-level developers.
  • Conflict Resolution: Effectively resolves conflicts and promotes a harmonious team environment.
  • Resource Management: Efficiently manages resources, including budget, time, and personnel.
  • Business Acumen: Understands the business aspects of projects and makes decisions aligned with organizational goals.
  • Strategic Partnerships: Establishes strategic partnerships with external stakeholders to enhance project outcomes.
  • Innovation: Encourages and fosters innovation within the team, driving continuous improvement.
  • Technical Expertise: Possesses deep knowledge and expertise in Celery development and related technologies.
  • Risk Management: Identifies and mitigates project risks, ensuring the successful delivery of projects.
  • Team Building: Builds and nurtures a high-performing team, fostering a positive and collaborative culture.
  • Communication and Presentation: Communicates complex ideas effectively and delivers impactful presentations.

Cases when Celery does not work

  1. Celery may not work if the required dependencies are not installed properly. It relies on several external libraries such as RabbitMQ, Redis, and SQLAlchemy. If these dependencies are not correctly set up, Celery may fail to function as expected.
  2. If the configuration settings are not properly configured, Celery may not work as intended. Incorrectly specified broker URL, result backend, or task queues can lead to issues with task execution and communication.
  3. Another common reason for Celery not working is when the worker processes are not running or are not properly connected to the message broker. If the workers are not actively listening for tasks or are unable to communicate with the broker, tasks will not be executed.
  4. Issues with the message broker itself can also cause Celery to stop working. If the message broker service (e.g., RabbitMQ, Redis) is down or experiencing problems, Celery will not be able to send or receive messages, leading to task failures.
  5. Incorrect task implementation or usage can also prevent Celery from working. If the task code contains errors, exceptions, or is not properly registered with Celery, it can result in failed task execution.
  6. If the system running Celery does not have enough resources (CPU, memory, disk space), it can lead to performance degradation or even complete failure. Insufficient resources can cause tasks to time out, fail, or not be processed at all.
  7. Network connectivity issues between the Celery worker nodes and the broker or result backend can also disrupt the functioning of Celery. If there are network disruptions, packet loss, or high latency, it can affect the reliability and responsiveness of Celery’s task execution.
  8. Lastly, misconfiguration or conflicts with other software or services running on the same system can interfere with Celery’s operation. Issues such as port conflicts, firewall rules, or conflicting library versions can cause Celery to malfunction.

What are top Celery instruments and tools?

  • Flower: Flower is a web-based monitoring tool for Celery. It provides a real-time view of task progress, statistics, and worker status. With an intuitive user interface, Flower allows you to easily monitor and manage your Celery cluster. It was first released in 2012 and has since become one of the most popular tools for monitoring and debugging Celery tasks.
  • Celery Beat: Celery Beat is a scheduler for Celery that allows you to schedule periodic tasks. It provides a simple and flexible way to define when and how often your tasks should run. Celery Beat has been a part of the Celery project since its early days and has proven to be a reliable tool for scheduling tasks.
  • Celery Cam: Celery Cam is a tool that records the execution history of Celery tasks. It captures task events and stores them in a database, allowing you to analyze and troubleshoot task execution. Celery Cam was first introduced in 2011 and has been widely used for monitoring and auditing Celery tasks.
  • Redis: Redis is an in-memory data structure store that is commonly used as a message broker in Celery. It provides fast and efficient message passing between Celery workers and allows for distributed task execution. Redis has been around since 2009 and is known for its speed and scalability.
  • RabbitMQ: RabbitMQ is another popular message broker for Celery. It provides reliable message queuing and delivery, making it a great choice for distributed task processing. RabbitMQ has been in development since 2007 and is widely used in the industry.
  • Celery Script: Celery Script is a domain-specific language for writing Celery tasks. It provides a concise and expressive syntax for defining task dependencies, retries, and other task-related properties. Although not as widely known as other tools, Celery Script offers a powerful way to define complex task workflows.
  • Celery HAT: Celery HAT (High Availability Task) is a tool that adds high availability and fault tolerance to Celery. It ensures that tasks continue to run even in the event of failures or outages. Celery HAT was introduced in 2016 and has gained recognition for its ability to keep Celery tasks running smoothly in production environments.
  • Celery Studio: Celery Studio is a visual workflow editor for Celery. It allows you to create and manage complex task workflows using a drag-and-drop interface. Celery Studio was released in 2019 as a way to simplify the creation and maintenance of Celery task flows.
  • Celery Task Monitor: Celery Task Monitor is a monitoring tool that provides real-time insights into the performance and health of Celery tasks. It tracks task execution times, success rates, and error rates, allowing you to identify bottlenecks and troubleshoot issues. Celery Task Monitor was developed in 2014 and has been widely adopted by Celery users.
  • Celery Inspector: Celery Inspector is a tool that allows you to inspect and debug Celery tasks at runtime. It provides an interactive shell where you can explore task state, arguments, and results. Celery Inspector was first released in 2013 and has been a valuable tool for troubleshooting and understanding task behavior.

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

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior0-2 yearsAssist in the development and maintenance of software applications under the guidance of senior developers. Debug and fix simple issues, write code based on specifications provided by senior team members. Collaborate with the team to learn and improve skills.$50,000 – $70,000
Middle2-5 yearsWork independently on assigned tasks, such as developing new features and modules, troubleshooting and resolving complex issues, and improving the performance of existing software applications. Collaborate with team members to design and implement technical solutions.$70,000 – $90,000
Senior5-10 yearsLead the development of complex software projects, provide technical guidance to junior and middle developers. Design and architect software solutions, optimize performance, and ensure scalability. Collaborate with cross-functional teams and stakeholders to deliver high-quality software products.$90,000 – $120,000
Expert/Team Lead10+ yearsManage a team of developers, providing leadership, guidance, and mentorship. Take ownership of multiple projects, establish development processes and best practices. Collaborate with stakeholders to define project objectives and deliverables. Drive innovation and technological advancements within the organization.$120,000 – $150,000+

Pros & cons of Celery

8 Pros of Celery

  • High in Nutrients: Celery is a low-calorie vegetable that is packed with essential vitamins and minerals. It is a good source of vitamin K, vitamin C, potassium, and folate.
  • Rich in Antioxidants: Celery contains antioxidants such as flavonoids and vitamin C, which help protect the body against oxidative stress and reduce inflammation.
  • Supports Digestive Health: The high fiber content in celery can promote a healthy digestive system by preventing constipation and supporting regular bowel movements.
  • May Lower Blood Pressure: Some studies suggest that celery may have antihypertensive properties, which can help lower blood pressure levels.
  • May Aid in Weight Loss: Due to its low calorie and high fiber content, celery can be a valuable addition to a weight loss diet as it helps you feel full without adding excess calories.
  • May Reduce Inflammation: The antioxidants and anti-inflammatory compounds in celery may help reduce inflammation in the body and alleviate symptoms of inflammatory conditions.
  • Hydrating Properties: Celery is made up of mostly water, which can help keep you hydrated and maintain a healthy fluid balance in the body.
  • May Have Cancer-Fighting Properties: Some research suggests that celery contains compounds that may have anticancer effects, including apigenin and luteolin.

8 Cons of Celery

  • Potential Allergies: Celery allergies are relatively common and can cause symptoms such as itching, swelling, and difficulty breathing in some individuals.
  • Oxalate Content: Celery contains oxalates, which can contribute to the formation of kidney stones in susceptible individuals.
  • High Sodium Content: Although celery is low in calories, it naturally contains sodium, which may be a concern for those on a low-sodium diet or with certain medical conditions.
  • Environmental Impact: Celery production can have a significant environmental impact due to water usage, pesticide application, and transportation.
  • Limited Nutritional Variety: While celery is nutritious, it is not a diverse source of nutrients compared to other vegetables.
  • Fibrous Texture: The fibrous nature of celery can be difficult for some individuals to chew and digest, particularly for those with certain dental or digestive conditions.
  • Not Suitable for Everyone: Celery may not be suitable for individuals with certain medical conditions, such as kidney problems or allergies, and it may interact with certain medications.
  • Potential Pesticide Residues: Conventionally grown celery may have pesticide residues, so opting for organic celery can help minimize exposure to these chemicals.

TOP 10 Celery Related Technologies

  • Python

    Python is the most popular language for Celery software development. Known for its simplicity and readability, Python provides a robust and efficient environment for building Celery applications. With a large community and extensive libraries, Python offers developers a wide range of tools and resources to enhance their Celery development process.

  • Celery

    Celery is a powerful distributed task queue system written in Python. It allows developers to easily distribute and execute tasks asynchronously across multiple workers and machines. With features like task prioritization, result caching, and task monitoring, Celery simplifies the development and management of background tasks in Celery software.

  • RabbitMQ

    RabbitMQ is a popular message broker that integrates seamlessly with Celery. It provides reliable message queuing and delivery, making it an ideal choice for Celery applications that require efficient task distribution. RabbitMQ’s robustness and scalability make it a preferred choice for handling large volumes of Celery tasks in production environments.

  • Django

    Django is a high-level Python web framework that offers built-in support for Celery integration. With its rich set of features like ORM, authentication, and templating, Django provides a solid foundation for building Celery-powered web applications. Django’s seamless integration with Celery simplifies the development of scalable and asynchronous web applications.

  • Redis

    Redis is an in-memory data structure store that can be used as a message broker and result backend for Celery. It provides fast and efficient data storage and retrieval, making it an excellent choice for handling Celery tasks. Redis’s versatility and performance make it a popular choice for Celery software development.

  • AWS Lambda

    AWS Lambda is a serverless computing platform that allows developers to run code without provisioning or managing servers. It integrates well with Celery, enabling developers to create scalable and event-driven applications. AWS Lambda’s pay-per-use pricing model and seamless integration with other AWS services make it a popular choice for Celery software development in cloud environments.

  • Kubernetes

    Kubernetes is an open-source container orchestration platform that simplifies the deployment and management of applications, including Celery-based ones. With its robust scaling, fault tolerance, and load balancing capabilities, Kubernetes provides a reliable infrastructure for running Celery tasks at scale. Its popularity and community support make it a valuable tool for Celery software development.

TOP 14 Facts about Celery

  • Celery is a versatile vegetable that belongs to the Apiaceae family, which also includes carrots, parsley, and fennel.
  • It is believed that celery originated in the Mediterranean region, where it was cultivated for medicinal purposes thousands of years ago.
  • Celery has a high water content, with about 95% of its weight being water. This makes it a hydrating and refreshing snack option.
  • One stalk of celery contains only about 6 calories, making it a low-calorie food choice for those looking to manage their weight.
  • Celery is rich in dietary fiber, which aids in digestion and helps maintain a healthy digestive system.
  • It is a good source of vitamins and minerals, including vitamin K, vitamin C, potassium, and folate.
  • The antioxidants found in celery, such as flavonoids and vitamin C, help protect the body against oxidative stress and inflammation.
  • Celery is known for its crunchy texture and distinct flavor, which can add depth to salads, soups, and stir-fries.
  • Some people may experience an allergic reaction to celery, known as celery allergy. Symptoms may include itching, swelling, and difficulty breathing.
  • Celery seeds, which have a slightly bitter taste, are often used as a spice or flavoring agent in various cuisines.
  • Celery has been traditionally used in herbal medicine to treat conditions such as high blood pressure, arthritis, and digestive disorders.
  • Research suggests that celery may have potential anti-inflammatory and anti-cancer properties due to its high antioxidant content.
  • Celery is a popular ingredient in juicing recipes, as it adds a refreshing taste and is believed to have detoxifying effects on the body.
  • When storing celery, it is best to keep it in the refrigerator, preferably in a sealed plastic bag, to maintain its freshness and crispness.

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