FinTech Principal Full-Stack Engineer — Automation & Leadership

SimCorp Sp. z o.o.; Warszawa; Hybrid; PLN 320,000 - 520,000; Full time

Benefits offered by this job

Hybrid workplace model

Flexible work hours

IP sprints: 3 weeks per quarter for up

Pension

Job summary

SimCorp is seeking a Principal Full-Stack Software Engineer to guide design, development, and quality across enterprise-scale applications.

You will mentor engineers, shape test strategies, and balance coding with automation initiatives, leveraging C#, Angular, and Azure DevOps in a hybrid Poland team. This role offers collaboration across Ukraine, Poland, Denmark, and Germany and a path to technical leadership.

Qualifications

• Bachelor’s or master’s degree in computer science, engineering, mathematics, or a related field.
• 8+ years of experience in software engineering with combined Dev QA responsibilities.
• Expertise in .NET / C# and working knowledge of Angular.
• Extensive background in test automation (E2E, API, Integration) and test strategy.
• Solid experience in architecting and developing enterprise-scale applications.
• Extensive knowledge of Cloud and On-Prem infrastructures (Microsoft Azure experience).
• Deep expertise in CI/CD pipelines and tools (Git, TeamCity, Azure DevOps).
• Thorough understanding of software architecture, design patterns, and Domain-Driven Design.
• Familiarity with XP practices (TDD, pair programming, continuous integration).
• Experience with relational databases (SQL).
• Readiness to learn APL, developing new features and debugging existing functionality, with full support from our team throughout the learning process.
• Proficient English communication skills (Upper-Intermediate or higher), both written and spoken.
• Ability to mentor, motivate, and guide a team toward technical excellence and efficient delivery.

Responsibilities

• Provide technical leadership in design, development, and testing.
• Define and own test architecture and quality strategy at team level.
• Balance active coding (C#, Angular, APL) with guiding automation initiatives
• Drive adoption of automation-first practices across the team.
• Ensure high-quality delivery by monitoring coverage, test metrics, and quality KPIs.
• Mentor and coach engineers in development, automation, and testing skills.
• Represent QA Dev combined approach in cross-team forums.
• Collaborate with stakeholders (POs, TLs, architects) to align technical and quality goals.
• Conduct in-depth root cause analysis for complex defects and ensure preventive actions
• Advocate for and implement improvements in tools, CI/CD pipelines, and engineering processes.
• Continuously assessing and improving engineering processes, recommending new tools and technologies to enhance productivity and software quality
• Represent the team in technical forums and contribute to cross-team knowledge exchange.

Skills

Leadership

.NET / C#

Angular

Test automation

CI/CD pipelines

Mentoring

English communication

Enterprise-scale apps

Azure Knowledge

Git

Education

Bachelor’s or Master’s in CS/Engineering

Tools

Git

TeamCity

Azure DevOps

SQL

APL

Job description

SimCorp is seeking a Principal Full-Stack Software Engineer to guide design, development, and quality across enterprise-scale applications.

You will mentor engineers, shape test strategies, and balance coding with automation initiatives, leveraging C#, Angular, and Azure DevOps in a hybrid Poland team. This role offers collaboration across Ukraine, Poland, Denmark, and Germany and a path to technical leadership.