Senior .NET Technical Lead

Infinity Quest; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Infinity Quest in Warszawa is looking for a Senior .NET Technical Lead / .NET Architect to drive backend architecture across microservices and cloud-native environments. You will mentor teams and define architectural direction while delivering scalable APIs and data models.

You will collaborate with frontend squads (React/Angular) and own CI/CD pipelines, code reviews, and DevOps practices to ensure high-quality, secure software delivery.

Qualifications

• Senior-level experience in .NET development and technical leadership.
• Proven ability to lead and mentor development teams and make architectural decisions.
• Hands-on with microservices-based applications and API backends.
• Experience across backend and frontend with React/Angular and .NET.
• Strong knowledge of CI/CD pipelines, DevOps practices, and container orchestration.

Responsibilities

• Lead and mentor development teams; set technical direction and architectural standards.
• Design and implement microservices-based backend APIs and scalable data models.
• Oversee code reviews and enforce best practices for quality and security.
• Coordinate full-stack delivery with frontend teams (React/Angular).
• Drive containerization and cloud-native strategies using Docker/OpenShift/ECS.
• Ensure high-performance, maintainable software and robust CI/CD pipelines.

Skills

C#

.NET

ASP.NET

MVC

Web API

SQL Server

Microservices

Technical Leadership

React

Angular

Backend development

Docker

OpenShift

ECS

Git

CI/CD

Kubernetes

Tools

Docker

OpenShift

ECS

Git

GitHub

Bitbucket

Jenkins

TeamCity

ROD

LightSpeed

Job description

Job Title: Senior .NET Technical Lead / .NET Architect

Experience: Senior-level experience in .NET development and technical leadership

1. Core .NET Development

• Strong expertise in C#, .NET, ASP.NET, MVC, Web API
• Strong experience with SQL Server
• Hands-on experience developing microservices-based applications
• Strong understanding of backend and API development

2. Technical Leadership

• Proven experience leading and mentoring development teams
• Ability to provide technical direction and make architectural decisions
• Experience conducting code reviews and ensuring development best practices
• Strong understanding of software architecture
• Expertise in microservices architecture and design patterns
• Knowledge of scalable, maintainable and high-performance application design

4. Full-Stack Development

Experience across both backend and frontend technologies, including:

• React
• Angular
• .NET / C# backend technologies

5. Containerization & Cloud-Native Technologies

Hands-on experience with:

• Docker
• OpenShift
• ECS

6. Database

• Strong experience with relational databases
• Database design, performance tuning and optimization
• Git
• GitHub
• Bitbucket

8. Agile & DevOps

• Experience working in Agile/Scrum environments
• Sprint planning and task estimation
• Experience with CI/CD pipelines
• DevOps tools such as:
• Jenkins
• TeamCity
• ROD
• LightSpeed

9. Code Quality & Security

• Code coverage and quality practices
• SonarQube
• Strong experience conducting code reviews
• Experience addressing VA / vulnerability fixes

10. Soft Skills

• Ability to communicate effectively with technical and non-technical stakeholders
• Strong stakeholder management and team collaboration skills

Must-Have Keywords

C# + .NET/ASP.NET + Web API + MVC + SQL Server + Microservices + Technical Leadership + Docker + Kubernetes + Git + CI/CD