Senior Software Engineer – Mainframe Modernization & Cloud

Kyndryl; United States; Hybrid; USD 150,000 - 210,000; Full time

Job summary

Kyndryl is seeking an experienced Software Engineer to join our modernization efforts. You will work on complex software projects, applying a strong foundation in Java, Python, and .NET, with a focus on scalable architectures and robust development practices.

You’ll contribute to microservices, containerized environments, and modern engineering disciplines while building solutions that enable cloud integration and performance optimization. Hybrid-friendly culture supports growth and impact.

Qualifications

• Minimum 9+ years of experience as a software engineer on complex projects.
• Strong coding skills in Java, Python and .NET with debugging and problem-solving.
• Experience with scalable and robust software development methods.
• Experience with relational and NoSQL databases, data mapping, XML/JSON, REST services.
• Knowledge of microservices architecture, containers (Docker & k8s), and messaging queues.
• Strong understanding of OOP and design patterns.

Responsibilities

• Maintain performance: monitor architecture and optimize code for mainframe-like systems.
• Debug and test: troubleshoot and analyze complex interactions to keep mission-critical apps running.
• Develop for the future: extract business logic from legacy systems for cloud-based migration or integration.

Skills

Java

Python

.NET

OOP

Design patterns

Microservices architecture

REST

XML/JSON

Relational databases

NoSQL databases

Docker

Kubernetes

Education

Bachelor's degree in Computer Science or related field

Tools

Docker

Kubernetes

Job description

Kyndryl is seeking an experienced Software Engineer to join our modernization efforts. You will work on complex software projects, applying a strong foundation in Java, Python, and .NET, with a focus on scalable architectures and robust development practices.

You’ll contribute to microservices, containerized environments, and modern engineering disciplines while building solutions that enable cloud integration and performance optimization. Hybrid-friendly culture supports growth and impact.