Lead .NET Engineer with AWS

EPAM Systems; Poland; Hybrid; PLN 180,000 - 320,000; Full time

Benefits offered by this job

Hybrid work mode

Remote within Poland

Relocation opportunities

Employee stock purchase plan

Referral bonuses

Job summary

EPAM Systems Poland is seeking a Lead .NET Developer with AWS expertise to drive the transformation of legacy applications into cloud-native, scalable solutions. You will migrate selected microservices to .NET Core, modernize from Windows to Linux, and ensure optimal performance with AWS services.

You will work on AI-enabled modernization engagements, collaborating with AWS ProServe and utilizing AWS Well-Architected best practices within a hybrid Poland work model.

Qualifications

• 5+ years of software development experience with leadership background.
• Proficiency in C# / .NET Core and strong knowledge of .NET Framework.
• Advanced AWS native development and microservices experience.
• Experience migrating legacy .NET Framework (Windows) to .NET Core (Linux).
• Proficiency with SQL Server, PostgreSQL and Amazon Aurora PostgreSQL.
• Experience with stored procedure migration (T-SQL to PL/pgSQL) and testing.
• Knowledge of unit and performance testing.
• Ability to collaborate with US EST time zone.
• Strong English communication skills (B2 or higher).

Responsibilities

• Design and develop high-performance, scalable applications with .NET Core and a microservices architecture.
• Migrate and refactor legacy .NET Framework applications to .NET Core with improved performance.
• Refactor code and stored procedures for PostgreSQL/Aurora PostgreSQL compatibility.
• Implement unit and performance tests to ensure stability and production readiness.
• Collaborate with database engineers and AWS ProServe on validation and optimization.
• Apply AWS Well-Architected Framework principles across security, reliability, and performance.

Skills

C# / .NET Core

AWS

Microservices

.NET Framework

SQL Server

PostgreSQL

Aurora PostgreSQL

Unit testing

Performance testing

English (B2)

Job description

We are looking for a Lead .NET Developer with AWS to join our dynamic and collaborative team. This engagement focuses on the transformation of legacy applications into scalable, cloud-native solutions, including the migration of selected microservices to the latest .NET Core, modernization from Windows to Linux, performance optimization and seamless integration with AWS services. We deliver the work as an AI agentic modernization engagement that leverages Kiro and Amazon Transform, aligned with AWS cloud-native best practices and the AWS Well-Architected Framework.

Responsibilities

• Use Kiro and Amazon Transform to accelerate code analysis, refactoring and migration tasks; validate and optimize tool-generated outputs


• Design and develop high-performance, scalable applications with .NET Core and a microservices architecture


• Migrate and refactor legacy .NET Framework (Windows) applications to .NET Core (Linux), with functional parity and improved performance


• Modify and optimize application code and stored procedures for compatibility with PostgreSQL / Aurora PostgreSQL, in line with AWS development standards


• Implement unit tests and performance tests for application stability, responsiveness and production readiness


• Partner with database engineers for seamless integration between application code and PostgreSQL; work closely with AWS ProServe consultants on validation and optimization


• Apply AWS Well-Architected Framework principles across security, reliability, performance efficiency and operational excellence


• Capture key findings, migration strategies, code conversion patterns and technical validation results for long-term maintainability and knowledge transfer

Requirements

• 5+ years of experience in software development with proven leadership background


• Expertise in C# / .NET Core and advanced proficiency in .NET Framework


• Advanced skills in AWS native development and microservices architecture


• Background in .NET legacy (Windows) to .NET Core (Linux) modernization


• Proficiency in SQL Server, PostgreSQL and Amazon Aurora PostgreSQL


• Competency in stored procedure migration (T-SQL to PL/pgSQL)


• Knowledge of unit and performance testing


• Ability to overlap with the US EST time zone


• English communication skills at B2 level or higher

Nice to have

• Familiarity with Kiro and Amazon Transform


• Understanding of AWS DMS / SCT


• Skills in Docker and containerization on AWS, including Amazon ECS / EKS


• Background in CI/CD pipelines (GitHub Actions, CodePipeline)

We offer

• We gather like-minded people:


• Top tech minds driving innovation in AI, cloud and digital platform modernization


• Supportive team and agile, startup-like culture


• Hybrid by design mode and opportunity to work remotely within Poland


• Chance to work abroad for up to 60 days annually


• Business-driven relocation opportunities


• Thought leadership, mentoring, soft skills and well-being programs


• We cover it all:


• Participation in the Employee Stock Purchase Plan with a 15% discount


• Referral bonuses up to $2,000


• Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more


• Corporate, social and well-being events


• Please, note:


• Benefits listed above are available to employees only


• We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually


• We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.