Senior Full Stack Engineer: Enterprise Modernization & AI

Square One Resources Limited; Poland; Remote; PLN 240,000 - 360,000; Full time

Job summary

Square One Resources Limited is seeking experienced Senior Full Stack Engineers to join a large-scale technology modernization program within the financial services sector.

The program focuses on modern application development, cloud transformation, legacy and mainframe modernization, data migration, and modern software architecture. This is a complex, enterprise-scale transformation initiative requiring collaboration with experienced engineers, architects, and technology specialists.

Qualifications

• Strong experience in full stack software development in enterprise environments.

Responsibilities

• Design, develop, and maintain modern enterprise applications.
• Work across both backend and frontend development.
• Build scalable and secure APIs and system integrations.
• Develop cloud-native applications and services.
• Contribute to the modernization of legacy applications and enterprise systems.
• Participate in transformation to microservices and event-driven solutions.
• Collaborate with Solution Architects, Technical Leads, DevOps, Data, Cloud, and Mainframe teams.
• Support application and data migration initiatives.
• Ensure high standards of code quality, performance, security, and maintainability.
• Participate in technical discussions and architectural decisions.
• Work in an Agile environment with distributed engineering teams.

Skills

Full Stack software development

Backend development

Frontend development

REST APIs and integrations

Cloud and cloud-native technologies

Microservices and distributed systems

Enterprise-scale applications

CI/CD and modern practices

Cross-functional collaboration

Tools

React

Angular

Kafka

Terraform

Jenkins

Git

GitHub Actions

Azure DevOps

Job description

Square One Resources Limited is seeking experienced Senior Full Stack Engineers to join a large-scale technology modernization program within the financial services sector.

The program focuses on modern application development, cloud transformation, legacy and mainframe modernization, data migration, and modern software architecture. This is a complex, enterprise-scale transformation initiative requiring collaboration with experienced engineers, architects, and technology specialists.