Senior Software Engineer — CRM Integrations & Data Enrichment

cognism; Warszawa; On-site; PLN 200,000 - 320,000; Full time

Job summary

Cognism is seeking a Senior Software Engineer to join our Integrations & Enrich team. You will build backend services for CRM integrations and enrichment workflows, enabling secure data exchange with customer platforms like Salesforce and HubSpot.

You will own features end-to-end and collaborate with multiple teams to deliver reliable data experiences. Strong backend skills, distributed systems knowledge, and experience with AWS are essential.

Qualifications

• 5+ years of professional software engineering experience.
• Strong backend skills using Java, Scala, Kotlin, C# or modern TypeScript/Node.js.
• Experience building APIs and system integrations.
• Knowledge of distributed systems and asynchronous processing.
• Experience with AWS or another major cloud platform.
• Understanding of CI/CD, automated testing and production support.
• Excellent communication skills and fluent English.

Responsibilities

• Design and develop backend services supporting CRM integrations and enrichment workflows.
• Build scalable APIs enabling secure data exchange between Cognism and customer platforms.
• Own software throughout its lifecycle, from design through production operations.
• Collaborate with Product Managers, Customer Success, Data Engineering and Platform teams.
• Improve integration reliability, synchronization performance and customer experience.
• Write high-quality automated tests and participate in code reviews.
• Contribute to architecture discussions and engineering best practices.
• Leverage AI-assisted engineering tools to improve software delivery and quality.

Skills

Backend engineering

Distributed systems

APIs

English fluency

Production support

CI/CD

AWS

Tools

AWS

Kafka

Kubernetes

TypeScript/Node.js

Job description

Cognism is seeking a Senior Software Engineer to join our Integrations & Enrich team. You will build backend services for CRM integrations and enrichment workflows, enabling secure data exchange with customer platforms like Salesforce and HubSpot.

You will own features end-to-end and collaborate with multiple teams to deliver reliable data experiences. Strong backend skills, distributed systems knowledge, and experience with AWS are essential.