Principal Full-Stack Software Engineer (FinTech)

TL;DR

Principal Full-Stack Software Engineer (FinTech): Provide technical leadership for enterprise investment operations products with an accent on test architecture, automation-first practices, and high-quality delivery. Focus on driving CI/CD and engineering process improvements while mentoring engineers and performing root-cause analysis for complex defects.

Location: Warsaw

Company

hirify.global builds integrated investment management solutions for financial institutions.

What you will do

• Provide technical leadership across design, development, and testing.
• Define and own test architecture and quality strategy at team level, including E2E/API/integration automation.
• Balance active coding with guiding automation-first initiatives and adoption across the team.
• Ensure high-quality delivery by monitoring coverage, test metrics, and quality KPIs.
• Mentor and coach engineers; represent the QA Dev combined approach in cross-team forums.
• Drive improvements in tools, CI/CD pipelines, and engineering processes; perform root-cause analysis for complex defects.

Requirements

• 8+ years of software engineering experience with combined Dev QA responsibilities.
• Expertise in .NET/C# and working knowledge of Angular.
• Extensive test automation experience (E2E, API, integration) and test strategy ownership.
• Solid experience architecting and developing enterprise-scale applications; strong understanding of software architecture, design patterns, and Domain-Driven Design.
• Deep knowledge of CI/CD pipelines and tools (Git, TeamCity, Azure DevOps) plus experience with Cloud and On-Prem infrastructures (Microsoft Azure).
• Proficient English communication (Upper-Intermediate or higher), written and spoken.

Nice to have

• Experience with Azure or similar cloud platforms.
• Background in FinTech/capital markets and financial domain knowledge (derivatives such as options, futures, swaps).

Culture & Benefits

• Hybrid workplace model and flexible work hours.
• Competitive salary with bonus scheme and pension.
• IP sprints: 3 weeks per quarter for skill mastery and contributing to company development.
• Individual approach to professional development to support the direction you want to take.

Hiring process

• Submit the application in English via the career site; applications are processed continuously.
• Only applications sent through the system are processed.
• Interviews and evaluation focus on professional fit; avoid including non-professional personal data (e.g., photo, age).