Lead Software Engineer — Cloud, Data Lake & Architecture

London Stock Exchange Group; Gdynia; Hybrid; PLN 265,000 - 419,000; Full time

Benefits offered by this job

Annual bonus

Healthcare

Job summary

London Stock Exchange Group is seeking a Lead Software Engineer in Gdynia to shape the technical direction of a focused platform. You will lead design, review, and delivery of scalable cloud services, mentor engineers, and drive high-quality releases. Strong hands-on experience in C#, Azure, and data pipelines is essential.

The role blends leadership with hands-on delivery, focusing on reliability, observability, and secure service communication in a modern cloud environment.

Qualifications

• Design and implement distributed systems at scale.
• Strong programming in C#, with OO and functional patterns.
• Experience with Python for automation or data workflows.
• Hands-on Spark SQL and PostgreSQL, data-engineering patterns.
• Expertise with Microsoft Azure and dev-container workflows.
• Design APIs and secure service-to-service communication.
• Ability to guide team decisions and maintain architectural consistency.

Responsibilities

• Define and drive technical direction for a platform area.
• Lead code reviews, design walkthroughs, and architecture discussions.
• Build, optimize, and operate scalable cloud-based services.
• Develop CI/CD pipelines and automated releases.
• Mentor engineers and raise engineering quality across the team.
• Collaborate on data lake solutions and event-driven patterns.

Skills

C#

Python

Spark SQL

PostgreSQL

Azure

AKS

APIs

Dev containers

Tools

Delta Lake

Job description

London Stock Exchange Group is seeking a Lead Software Engineer in Gdynia to shape the technical direction of a focused platform. You will lead design, review, and delivery of scalable cloud services, mentor engineers, and drive high-quality releases. Strong hands-on experience in C#, Azure, and data pipelines is essential.

The role blends leadership with hands-on delivery, focusing on reliability, observability, and secure service communication in a modern cloud environment.