fb-pixel

We are aware of people impersonating our employees offering jobs through WhatsApp or iMessage. When in doubt, reach out to us at [email protected] to confirm authenticity.

Location

Poland

Rate

$30  / per hour

Years of experience

7+

About

As an experienced SQL developer, I specialize in crafting complex queries, stored procedures, and functions, with a strong focus on performance tuning and query optimization in big data environments. My expertise spans all phases of database programming, including data warehousing and ETL processes. Throughout my career, I have successfully implemented numerous projects, ensuring robust customer relations and the seamless execution of database solutions. My technical skill set includes a deep proficiency in technologies such as SQL Server, Snowflake, Python, PowerBI, and Hadoop, among others. Currently, as a SQL Developer at Nordea, I am part of the Environmental, Social, and Governance development team, where I architect, enhance, and optimize multi-terabyte data warehouses. My responsibilities include ETL processes from various sources like Snowflake and Hadoop, developing scalable analytical models, and optimizing queries for large-scale databases. Prior to this, I served as a Senior Implementation Specialist at Mastercard Processing S.A., where I led technically complex processing projects and managed the entire project lifecycle. My background also includes significant experience at Centrum Finansowe S.A., where I developed and optimized the database infrastructure for the debt collection process, ensuring efficient operational workflows and generating critical reports for executive management.

Tech Stack

SQL Server, Confluence, DAX Studio, Git, Hadoop, Jira, Power BI, Python, Snowflake, SQL, Ssis, SSRS

Experience

  • Designed, enhanced, and optimized multi-terabyte data warehouses to support complex analytical needs, ensuring high performance and scalability.
  • Managed ETL (Extract, Transform, Load) processes from diverse data sources, including Snowflake, Hadoop, and SQL Server, to ensure seamless data integration and processing.
  • Specialized in performance tuning and optimization of complex queries in big data environments, improving efficiency and reducing processing times.
  • Spearheaded the execution of technically complex processing implementation projects, managing all phases of the project lifecycle from planning to delivery.
  • Developed and managed sophisticated database infrastructures, particularly in the context of debt collection processes, to enhance operational workflows.
  • Generated detailed reports for executive management, facilitating informed decision-making through precise data analysis and reporting.
  • Developed scalable and tabular analytical models tailored for end-user applications, leveraging tools like PowerBI and DAX for advanced data analysis.

Employment history

SQL Developer, Nordea March 2024 - Present
  • Architected, enhanced, and optimized multi-terabyte data warehouses.
  • Developed ETL processes from various data sources including Snowflake, Hadoop, and SQL Server.
  • Created proprietary, scalable, and tabular analytical models for end-user applications.
  • Performed performance tuning and query optimization for large-scale big data databases.
  • Collaborated with a team of experts on data integration and analytical solutions.
  • Utilized tools like Python, PowerBI, and DAX for advanced data analysis.
Senior Implementation Specialist, Mastercard Processing S.A. September 2023 - March 2024
  • Led the execution of technically complex processing implementation projects.
  • Managed multiple customer implementation projects concurrently.
  • Oversaw all phases of the project lifecycle, ensuring precise and timely delivery.
  • Utilized tools like PL/SQL, Linux, Git, and GitLab for project development and deployment.
SQL Server Developer in IT Department, Centrum Finansowe S.A. June 2017 - August 2023
  • Developed and managed database infrastructure for the debt collection process.
  • Created proprietary solutions to enhance operational workflows.
  • Optimized complex queries and managed MS SQL Server infrastructure.
  • Generated detailed reports for executive management to support decision-making.
  • Utilized tools like SQL Server, SSIS, SSAS, and SSRS for database development and reporting.
Specialist in Valuation and Analysis Department, Centrum Finansowe S.A. November 2016 - June 2017
  • Conducted valuation and analysis of financial data.
  • Supported the IT department with data analysis tasks.
  • Collaborated with other departments to ensure accurate financial reporting.
Office Worker/Senior Office Worker in Retail Debt Collection Department, Centrum Finansowe S.A. January 2012 - October 2016
  • Assisted in the debt collection process through data management and reporting.
  • Supported senior management with administrative tasks related to debt collection.
  • Maintained and updated debt collection databases.

Education history

Uniwersytet Warszawski 2017 - 2018 Postgraduate Studies, Economical data analysis in Microsoft Excel and VBAprogramming language
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie 2015 - 2016 Postgraduate Studies, Information Systems and Data Analysis
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie 2010 - 2012 Masters studies, economics
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie 2006 -2010 Bachelor studies, economics
Download profile as PDF

We’ve helped 83 clients with IT recruitment and software development.

Read about a few of them below...

DevsData LLC Reviews 5.0 stars 37 reviews
Powered byClutch logo
Powered byClutch logo
See more testimonials
Similar blind CVs/resumes
Poland

Swagger Developer Resume Sample

Senior Java Software Developer skilled in backend architecture, database management, and team mentoring.
Swagger-icon
Swagger
Angular-icon
Angular
Bash-icon
Bash
Docker-icon
Docker
Git-icon
Git
Hibernate-icon
Hibernate
Java-icon
Java
JavaScript-icon
JavaScript
Kafka
Kubernetes-icon
Kubernetes
Microservices
MySQL-icon
MySQL
Oracle
PL/SQL
Python-icon
Python
Spring Framework
Rate $25  /  per hour
Poland

Sample COO Resume

A COO with over 20 years of experience in banking.
ERP
CRM
Google Analytics
Jira
Marketing
MS SQL
Oracle
Power BI
Project Management
ServiceNow
Workday
Rate $20  /  per hour
Poland

Board Member Resume Sample

A highly experienced executive with over 20 years of leadership.
MS Office
Asana
ERP
Jira
Microsoft Excel
Oracle
Project Management
SAP
Workday
Rate $25  /  per hour
USA

Chief of Staff Resume Sample

A highly strategic and visionary operations executive.
ERP
Confluence
CRM
Jira
Power BI
Project Management
ServiceNow
Slack
Tableau-icon
Tableau
Rate $125  /  per hour
Ukraine

Senior Android Developer Resume Sample

Senior Android Developer with expertise in Kotlin, app architecture, and complex backend integration.
Android-icon
Android
C++-icon
C++
Git-icon
Git
Java-icon
Java
Jenkins-icon
Jenkins
Kotlin-icon
Kotlin
Rate $15  /  per hour
UK

C Level Resume Sample

Experienced CTO with 20+ years in AI, data science, and tech leadership, driving innovation, growth, and sustainability.
Java-icon
Java
AWS-icon
AWS
Azure-icon
Azure
C#-icon
C#
C++-icon
C++
CSS-icon
CSS
Elasticsearch
Git-icon
Git
Github
HTML-icon
HTML
JavaScript-icon
JavaScript
Jenkins-icon
Jenkins
MongoDB-icon
MongoDB
PHP-icon
PHP
Python-icon
Python
SQL-icon
SQL
Rate $60  /  per hour
Poland

Work From Home Resume Sample

Senior .NET Developer with expertise in backend architecture, business analysis, and system integration.
.NET-icon
.NET
Angular-icon
Angular
ASP.NET
C#-icon
C#
Microservices
MS SQL
Typescript-icon
Typescript
Rate $15  /  per hour
Poland

CEO Resume Sample

A CEO over 15 years of leadership experience.
ERP
Asana
AWS-icon
AWS
CRM
Microsoft Azure
MS Office
Oracle
Salesforce
SAP
Slack
Rate $25  /  per hour
Poland

Product Designer Resume Sample

Experienced Product Designer skilled in UX/UI, platform monetization, and leading cross-functional teams.
Designer-icon
Designer
Figma-icon
Figma
Product Manager
Project Management
Sketch-icon
Sketch
UI/UX
UX-icon
UX
Rate $17  /  per hour
map

Our global locations

Or meet our local partners in other regions we serve

I agree to and accept that DevsData LLC will provide better user experience by collecting, analyzing and cataloging information about Internet electronic addresses that I have connected with my devices and about the type of my devices (such as the type and version of software) as well as by making automatic decisions (not involving sensitive data). The agreement applies for the legally binding period, or until either the user or DevsData LLC withdraws from the agreement. Withdrawing from the agreement will result in removing the user's data. Please see our privacy policy.

We use cookies to provide the best experience for you. >More about cookie policyarrow

Accept Decline

Book a call with our team

For software development projects, minimum engagement is $15,000.

whatsapp
Prefer email?
[email protected]
Quote mark

Best back-end engineers I've ever worked with...​

“I interviewed about a dozen different firms. DevsData LLC is truly exceptional – their backend developers are some of the best I’ve ever worked with. I’ve worked with a lot of very well-qualified developers, locally in San Francisco, and remotely, so that is not a compliment I offer lightly. I appreciate their depth of knowledge and their ability to get things done quickly. “

Avatar

Nicholas Johnson

CEO of Orange Charger LLC,

ex-Tesla Engineer,

Mentor at YCombinator

Success

Thank you


We'll get back to you within 1 business day.