ETL / Integration Developer REST APIs, SQL, Python, ETL Warsaw

DCG Poland; Warszawa; On-site; PLN 75,000 - 95,000; Full time

Benefits offered by this job

Private medical care

Co-financing for the sports card

Constant support of dedicated consultant

Job summary

DCG Poland is seeking an experienced ETL / Integration Developer in Warsaw, Poland. The role involves designing and maintaining ETL workflows, integrating banking applications using APIs, and ensuring data quality and compliance with regulations.

The ideal candidate should have over 5 years of experience in data engineering, strong SQL and Python skills, and a solid understanding of API integration. The position offers benefits like private medical care and sports card co-financing.

Qualifications

• Minimum 5 years of experience in data engineering or ETL development.
• Hands-on experience with REST APIs and API authentication methods.
• Fluency in English (both written and spoken).

Responsibilities

• Design, develop, and maintain ETL workflows.
• Integrate banking applications using APIs.
• Troubleshoot data flow issues.

Skills

Data engineering

ETL development

API integration

SQL

Python

Analytical skills

Problem-solving skills

Communication

Tools

IBM DataStage

Apache Airflow

Job description

As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for:

ETL / Integration Developer

Responsibilities:

• Design, develop, and maintain ETL workflows using IBM DataStage and Apache Airflow
• Integrate banking applications and third‑party systems using APIs
• Work closely with architecture, business, and application teams to understand banking data flows and integration requirements
• Develop and maintain data processing scripts using SQL and Python
• Handle API responses, authentication, error management, and integration‑related issues
• Support testing, deployment, and monitoring of ETL and integration solutions
• Ensure data quality, security, and compliance with banking standards and regulatory requirements
• Troubleshoot data flow issues and support continuous improvement of existing integration processes

Requirements:

• Minimum 5 years of experience in data engineering, ETL development, data integration, or a similar role
• Strong understanding of API and integration concepts
• Hands‑on experience with REST APIs
• Knowledge of API authentication methods, API response handling, and error management
• Advanced SQL skills
• Experience with Python scripting, including data‑related libraries such as Pandas
• Good understanding of ETL processes and data integration principles
• Ability to work closely with technical and business stakeholders
• Strong analytical and problem‑solving skills
• Good communication skills and ability to work in a collaborative environment
• Fluency in English (both written and spoken)

Nice to have:

• Experience with Apache Airflow
• Experience in ETL design, development, testing, and deployment
• Basic to intermediate Unix/Linux shell scripting knowledge
• Good understanding of Data Warehouse concepts
• Knowledge of dimensional modelling
• Experience working in a banking or financial services environment

Offer:

• Private medical care
• Co‑financing for the sports card
• Constant support of dedicated consultant