Principal Software Engineer

WHO WE ARE

Join some of the most innovative thinkers in FinTech as we lead the evolution of financial technology. If you are an innovative, curious, collaborative person who embraces challenges and wants to grow, learn and pursue outcomes with our prestigious financial clients, say Hello to SimCorp!

At its foundation, SimCorp is guided by our values — caring, customer success-driven, collaborative, curious, and courageous. Our people-centered organization focuses on skills development, relationship building, and client success. We take pride in cultivating an environment where all team members can grow, feel heard, valued, and empowered.

WHY THIS ROLE IS IMPORTANT FOR US 

As a Principal Software Engineer, you will play a key role in driving technical excellence and leading backend development within your team. You will work across all stages of the development lifecycle — designing, coding, testing, reviewing, and deploying solutions — while mentoring team members and influencing technical strategy.

You will leverage your expertise in .NET technologies, databases, and the Azure cloud ecosystem to build scalable, high-performance solutions that power business-critical applications. This role requires a strong mix of hands-on engineering, architectural thinking, and leadership to ensure both immediate delivery and long-term sustainability.

WHAT YOU WILL BE RESPONSIBLE FOR:

• Making key design and implementation decisions compliant with architecture to ensure solution scalability, security, and performance.
• Promote best engineering practices within the team, including software design patterns, code quality, documentation, testing, and monitoring.
• Initiate and lead innovations and solution improvements.
• Collaborate with the Product Owner and Engineering Manager to assess delivery capacity and technical feasibility.
• Drive epic/features analysis and support prioritization of the engineering backlog.
• Apply your talents to all stages of the development lifecycle, including review of user stories, development, design, code reviews, and setting up automated test solutions and CI/CD pipelines.
• Support, coach, and nurture engineers to cultivate a proficient, proactive, and effective team.
• Ensure timely, high-quality delivery of tasks, present new features, and address client-reported bugs.
• Stay up-to-date with emerging trends and technologies in software development.

WHAT WE VALUE  

• 7+ years of hands-on experience with .NET technologies (C#, Microsoft .NET), including at least 2 years in a leading role.
• A backend-first mindset with strong architectural rigor.
• Proven experience building REST APIs with .NET (OData experience preferred).
• Strong working knowledge of Azure cloud services, including:

• Azure App Services / Azure Functions
• Azure API Management
• Azure DevOps (Pipelines, Repos, Boards)
• Azure Service Bus / Event Grid
• AKS

Strong database expertise:

• Proficiency with SQL Server (design, optimization, indexing, performance tuning).
• Understanding of data modeling, normalization/denormalization, and query optimization.
• Experience with database versioning/migrations.
• Proficient understanding of design patterns and principles (OOP, GoF, SOLID).
• Strong background in software development practices such as TDD, BDD.
• Hands-on experience with peer code reviews and code quality tools (e.g., SonarQube).
• Experience with Docker/Kubernetes, especially AKS.
• Familiarity with messaging platforms such as Service Bus, Event Hub, Kafka.
• Strong background in distributed systems, REST API design, asynchronous messaging, and cloud-native patterns.
• Solid working knowledge of DevOps practices, CI/CD pipelines, IaC, automated testing, and application monitoring.
• Excellent communication skills and experience leading engineers or cross-functional teams.
• Experience with Git and collaborative workflows.
• Solid experience in Agile/Scrum environments.
• Excellent problem-solving skills with the ability to make sound architectural and technical decisions.
• Knowledge of Angular (v10+), TypeScript, and frontend architecture principles is a plus.

Personal Competencies

• Comfortable working in an international, multicultural environment.
• Positive, constructive mindset — you bring energy, collaboration, and positive vibes to your team.
• Strong sense of responsibility for both technical quality and a healthy team culture.
• Excellent communication skills with fluency in English (speaking and writing).
• Natural leadership skills: able to inspire, mentor, and guide engineers while remaining hands-on.

Educational Background

• Bachelor's degree in Computer Science or a related field.

BENEFITS

• Flexible working hours and hybrid model — 2 days in the office, 3 days remote.
• Modern office (next to Wilanowska metro station) with quiet zones and ergonomic workstations.
• Base salary with annual bonus structure.
• Holiday allowance upon a 2-week vacation.
• Occasional remote work across Poland and international options available (up to 24 days domestic, 20 days international per year — subject to internal policy).
• Employer-paid Medicover Platinum healthcare package (employee-paid family upgrade available).
• Multisport card with 75% employer contribution.
• Unum group life insurance (employee-paid upgrade available).
• Medicover travel insurance for private trips and global business travel insurance.
• Possibility to join Deutsche Börse Group Share Plan (eligible after 1 year).
• Copyrights program for certain roles.
• Possibility to develop your career in an international environment.
• Professional training and courses provided by SimCorp.
• Polish language classes for foreign employees; German and English classes based on business needs.
• Integration events, volunteering initiatives and employee-led clubs.

NEXT STEPS

Please send us your application in English via our career site as soon as possible — we process incoming applications continually. Please note that only applications sent through our system will be processed.

At SimCorp, we recognize that bias can unintentionally occur in the recruitment process. To uphold fairness and equal opportunities for all applicants, we kindly ask you to exclude personal data such as photos, age, or any non-professional information from your application.

Compensation ranges are disclosed at the initial stage of candidate engagement.

If you are interested in being a part of SimCorp but are not sure this role is suitable, submit your CV anyway. SimCorp is on a positive growth journey, and our Talent Acquisition Team is ready to assist you in discovering the right role for you. The approximate time to consider your CV is three weeks.