Principal Software Engineer (.NET + Azure)

Key Info:

Principal Software Engineer (.NET + Azure) In total, we need as many as 6 candidates for the project (divided into smaller modules), which is already underway. They are supervised by an internal manager.

🌍 Location: 100% remote (work hours: 9am-5pm and occasional calls with US after hours)

💵 Rate: 170 PLN/h - 180 PLN/h net + VAT / B2B (slightly negotiable, no paid vacation)

📅 Planned Start: ASAP / 2 weeks (ideally) or max. 1 month

💼 Experience Level: 1-2 people at the senior manager level, 4 people at the manager level

Project Context

Work on the existing tax platform and implementation of AI solutions into it Our Global Tax Technology group is at the forefront of innovation, building cutting-edge AI-powered solutions that transform how we do business. We are a dynamic global collaborative team of engineers, data scientists, and product managers passionate about using technology (especially generative AI) to solve complex challenges.

In the Global Tax Technology space, we are looking for a person with senior commercial experience in software projects. The ideal profile is: an active full stack software developer with solid experience in an IT architect / IT Tech Lead role and some experience in the Team Lead role. The person will fulfil a key technical role in the tax platform environment with influence on strategic directions and managerial responsibility for a given area within it.

The responsibility scope will include: technology (Tech Lead) and engineering team (Team Lead).

This tax platform is an in-house built platform for tax practice to facilitate delivering tax consulting services to external clients. On a daily basis you will drive end-to-end design, development, and deployment activities of next-generation AI-driven tax technology solutions. You will leverage the latest Gen AI tools and agentic development techniques to build smarter, customer-oriented systems. You will work on a variety of challenging projects – from enhancing our core platform’s infrastructure to implementing new features using AI agents – while collaborating with stakeholders to ensure our solutions meet business needs and quality standards.

This position offers an opportunity to redefine how software is built by integrating AI assistants and multi-agent workflows into the development lifecycle.

Your Responsibilities

• 70% coding
• 30% acting as a TL / Architect
• Lead the design (whole components and particular features), development, and deployment of new solutions
• Proposing improvements to technical standards and delivery processes, promoting good practices in cooperation with other Tech Leads in Global Tax Technology
• Facilitating collaboration with Product Owners/Managers on product roadmaps, in alignment with other Tech Leads in Global Tax Technology, overseeing solution implementation
• Lead and mentor other Software Developers and Quality Analysts, support code and test plan reviews
• Monitor solution compliance with tax platform technical standards/security requirements and facilitate timely issue resolution and facilitate other DevOps tasks
• Support incident and problem management: help the platform L3 Support in Production issue troubleshooting, and facilitate resolution
• Stay up to date on the latest trends and technologies in AI and full-stack development by keeping current with new AI frameworks, agent platforms, CLI toolkits, and best practices in the industry.
• Leverage and promote GenAI usage in daily work and educate others on new ways of working.

Requirements

• 10-12+ years of experience in software projects within a global environment and a complex organization, including communicating directly to Business (end-users) or their representative and senior stakeholders
• 3-5+ years of experience as an IT Architect / IT Tech Lead / Principal, applying best practices including Agile, DDD, microservices, CQRS, CLEAN, and SOLID
• Proficiency in RESTful Web app development using C#/.NET, Python, and front-end technologies such as React, Angular, or Vue.js
• Proficiency in the Microsoft Azure and M365 cloud platforms, as well as Azure stack: Functions, Service Bus or Event Hub, App Services, SQL/MongoDB
• Experience with AI enabled development tools and agents such as GitHub Copilot, Cursor, OpenAI Codex, Claude Code, Gemini CLI, Antigravity, etc.
• Experience using test-driven and spec-drive development practices with tools such as Playwright, MS Test, Fluent, NUnit, K6, SpecKit, BMAD, etc.
• Experience with DevOps technologies is a must
• B2+ in written and spoken English (ideally C1+)