Senior Software Architect (.NET)

Bonapolia; Warszawa; On-site; PLN 320,000 - 420,000; Full time

Job summary

Bonapolia in Warsaw seeks a Senior Software Architect (.NET) to lead high-impact architecture across Azure cloud, microservices, and data platforms. You will shape system design, set standards, and guide teams to deliver secure, scalable solutions.

With 10+ years in .NET, you will create design docs, collaborate with customers, and explore technology options to improve implementation. Fluent English and strong leadership are expected.

Qualifications

• 10+ years of .NET application development background.
• Hands-on experience with microservices architecture and distributed systems.
• Experience leading teams to deliver secure, high-quality solutions.

Responsibilities

• Collaborate with the customer to understand functional and non-functional requirements for the system.
• Analyze requirements, prepare the design of the system, and monitor solutions to match them afterward.
• Guide and assist the development team and provide architectural blueprints to follow.
• Communicate and collaborate across teams to define optimal technical solutions.
• Share expertise on technical aspects of system development and integration and ensure that relevant technical strategies, policies, standards, and practices are applied correctly.
• Create, present, and explain high-level product specifications and design documents.
• Explore a range of technology and design possibilities to improve system implementation.

Skills

Microservices

Distributed systems

MongoDB

SQL Server

Azure Cloud

Architectural design

Technical design docs

Team leadership

Documentation

Organization

Education

Bachelor's or Master's in Computer Science/Software Engineering

Tools

GitHub Enterprise

Copilot

Job description

We are looking for Senior Software Architect (.NET)

About the Client

Our client is one of the Big Four accounting firms and the world’s largest professional services

network. Headquartered in London, they operate in 150+ countries with 460,000+ professionals

delivering excellence in audit, tax, consulting, and advisory.

Project Tech Stack

Azure Cloud, Microservices Architecture, .NET 8 ASP.NET Core services, Mongo, Azure SQL,

Angular 18, Kendo, GitHub Enterprise with Copilot

What You’ll Do

Collaborate closely with the customer to understand functional and non-functional software requirements for the system

Analyze functional and non-functional requirements, prepare the design of the system according to these requirements, and monitor solutions to match them afterward

Guide and assist the development team and provide them with architectural blueprints to follow

Communicate and collaborate across teams to define optimal technical solutions

Share expertise on technical aspects of system development and integration and ensure that relevant technical strategies, policies, standards, and practices are applied correctly

Create, present, and explain high-level product specifications and design documents

Explore a range of technology and design possibilities and alternatives to improve system implementation

What You Bring

10+ years of background in .NET application development

Experience with large-scale products, solid understanding and practical experience with microservices architecture and distributed systems

Proficiency in Mongo and/or SQL Server

Experience with Azure Cloud, including different SaaS offerings (Service Bus, Blob, Redis, etc.)

Experience writing technical design documents

Experience leading teams to develop high-quality and secure solutions to fulfill functional and non-functional requirements

Pragmatic approach to balancing process and flexibility in achieving objectives

Excellent organisational skills including the capacity to self-manage, structure work, set priorities, and meet deadlines

Nice to have

Hands-on experience with Microsoft Graph API, especially in the context of document retrieval and management workflows

Experience with document storage platforms (SharePoint, SharePoint Online, Azure Blob Storage, Amazon S3, and/or Dropbox)

Knowledge of Angular

Bachelor's or Master’s degree in Computer Science/Software Engineering or an equivalent third-level qualification in another technical field

English level

Advanced