Back End Developer

Virtual Coworker Inc.; Polska; On-site; PLN 120,000 - 180,000; Full time

Job summary

Virtual Coworker Inc. seeks a Mid‑Level Backend Developer to join its Financial Reporting team in Warsaw.

The role focuses on building scalable, robust solutions for global regulatory reporting, contributing to risk reduction and operational excellence across the Group. You will design and implement high‑performance reporting solutions using Spark (Scala preferred), develop ETL/ELT pipelines, and collaborate with Product Owners, Architects, Analysts and teams across geographies.

Qualifications

• Bachelor’s degree in Computer Science or related field.

Responsibilities

• Design and implement scalable, high‑performance reporting solutions.
• Build Spark-based applications (Scala preferred).
• Develop and maintain end‑to‑end ETL/ELT pipelines, including data transfer, validation, and business logic.
• Collaborate with Product Owners, Architects, Analysts and cross‑functional teams.
• Work in an Agile/Scrum environment with continuous delivery and fast feedback.
• Contribute to CI/CD pipelines and ensure quality via unit tests and peer reviews.
• Document solutions in JIRA, Confluence, and ALM.
• Integrate data from multiple sources supporting a microservices architecture.

Skills

Spark (Scala)

ETL/ELT pipelines

APIs & microservices

Big Data / SQL

CI/CD (Git/Jenkins)

English (B2+)

Analytical problem solving

Education

Bachelor’s degree in Computer Science or related field

Tools

Git

GitHub

Jenkins

Spark

Scala

Python

Airflow

Kubernetes

Docker

HP ALM

SonarQube

SQL databases

Azure/AWS

Job description

We are seeking a Backend Developer (Mid-Level) to join our Financial Reporting team within SCIB IT in Warsaw. This role focuses on building scalable, efficient, and robust solutions for global regulatory reporting, contributing to risk reduction and operational excellence across the Group.

As a Backend Developer, you will:

• Design and implement scalable, high-performance reporting solutions.
• Build Spark-based applications (Scala preferred).
• Develop and maintain end-to-end ETL/ELT pipelines, including data transfer, validation, and business logic.
• Collaborate closely with Product Owners, Architects, Analysts, and cross-functional teams across geographies.
• Work in an Agile/Scrum environment with a strong focus on continuous delivery and quick feedback loops.
• Contribute to CI/CD pipelines and ensure high-quality delivery through unit testing, automation, and peer reviews.
• Document solutions in standard tools (JIRA, Confluence, ALM).
• Integrate data from multiple sources, supporting a microservices-based architecture.

WHAT WE ARE LOOKING FOR

Required Qualifications:

• Bachelor’s degree in Computer Science or related field.
• 3+ years of experience in software/data engineering, preferably in financial services.
• Hands-on experience with Apache Spark (Scala).
• Strong background in ETL/ELT pipeline development.
• Knowledge of integration solutions (APIs, microservices).
• Familiarity with Big Data technologies and SQL databases.
• Experience with CI/CD tools (Git, GitHub, Jenkins).
• Professional English (B2+).

Preferred Qualifications:

• Experience with Python, Bash scripting, or Airflow/Control-M.
• Familiarity with Cloud platforms (Azure, AWS, Databricks, S3, Kubernetes, Docker, EMR).
• Understanding basics of cybersecurity/quality assurance (Sonar).
• Knowledge of software development lifecycle tools (HP ALM).
• Strong analytical and problem-solving skills.