Senior/Lead Software Engineer | OTC Product Area, Fintech Solutions

SimCorp; Województwo mazowieckie; Hybrid; PLN 180,000 - 320,000; Full time

Benefits offered by this job

Hybrid work model

Two days in Copenhagen office

Base salary with annual bonus

Medicover healthcare package

Job summary

SimCorp invites mid-level Software Engineers to join our fintech engineering team, building solutions for OTC asset management within SimCorp Dimension and SimCorp One. You will deliver features that advance the platform and maintain existing systems to keep client operations up and running.

The role emphasizes C# development with exposure to OCaml and APL, modernizing legacy code, and collaborating with product owners to refine requirements.

Qualifications

• Solid C# skills; ownership and architectural input depending on seniority.
• Experience with or interest in functional programming (OCaml, APL, F#, etc.).
• Experience refactoring legacy code and contributing to scalable backend architecture.
• Fluency in English (written and spoken).
• A relevant CS or STEM degree with hands‑on software engineering experience.

Responsibilities

• Design, build, and extend APIs for OTC asset management products.
• Work primarily in C#; familiarity with OCaml and APL is a plus.
• Refactor and modernize legacy code without disrupting the business.
• Improve quality, performance, and user experience.
• Collaborate with product owner to refine requirements and shape features.
• Code review, pair programming, and shared ownership of the solution.

Skills

C#

OCaml

APL

Functional programming

REST APIs

CI/CD

English

Education

CS/STEM degree

Job description

For over 50 years, we have worked closely with investment and asset managers to become the world’s leading provider of integrated investment management solutions. We are 3,500+ colleagues with a broad range of nationalities, educations, professional experiences, ages, and backgrounds in general.

SimCorp is an equal opportunity employer. We are committed to building a culture where diverse perspectives and expertise are integrated in our everyday work. We believe in the continual growth and development of our employees, so that we can provide best-in-class solutions to our clients.

While striving to deliver client value, we believe it is vital to consider our people and our planet in every business decision we make. Acting responsibly is not optional. It is essential.

Why This Role is Important to Us

We are looking for Software Engineers at middle level to join our engineering team that builds fintech solutions for managing OTC (Over-The-Counter) financial instruments within our asset management platform, SimCorp Dimension and SimCorp One. Our work delivers value in two major areas. First, we implement new features that drive the business forward and shape the future of our platform. Second, we focus on extending and maintaining our established solutions to ensure our clients’ operations remain uninterrupted and always available.

What You Will Be Responsible For

• Designing, building, and extending existing solutions and APIs for our OTC asset management product, delivering value to customers incrementally.
• Working primarily in C#. Our codebase also includes OCaml and APL therefore prior experience with these languages is a strong plus.
• Understanding, refactoring and modernizing our legacy codebase without disrupting the business it supports.
• Focusing on the systems as a whole and being able address fundamental changes that improves the quality, performance and user experience.
• Collaborating closely with your product owner to refine requirements, clarify business needs, and shape how features get built.
• Working as part of a team of skilled engineers — pairing, reviewing code, and sharing ownership of the solution with fellow engineers.
• Following good engineering practice: clean code, automated testing, and CI/CD.
• Building, extending and consuming REST APIs.
• Communicating clearly with both technical and business stakeholders.
• Continuously learning — and helping the team and product grow with you.

Required Skills & Experience

• Interest in creating innovative features for a complex platform, working on areas such as API scalability, automation, performance, and operational resilience - having space to explore, design and influence the final solution.
• Solid C# skills. This is the core language for the role; your level of seniority will determine how much ownership and architectural input you're expected to bring.
• Experience with, or genuine interest in, functional programming. Familiarity with OCaml, APL, F#, Standard ML, Scala or Haskell is a real advantage but not required — a willingness to learn is what matters most.
• Experience (or strong interest) in refactoring existing code and working with legacy systems.
• Track record of contributing to architectural decisions on scalable backend systems.
• Good collaboration and communication skills, with fluency in English (written and spoken).
• A relevant degree (Computer Science or STEM) with demonstrated hands‑on experience in software engineering.

Furthermore, We Value That You Are:

• motivated to work within the financial domain,
• comfortable working closely with a cross‑functional team,
• willing to learn and pick up new languages and paradigms as needed,
• able to identify tech debt and help drive incremental improvement,
• a collaborative person willing to share knowledge and learn from your team members.

Our Team and Ways of Working

We deliver solution for large scale financial institutions with billions of dollars in managed assets. Therefore, our work impacts everyday of our customers operations. You will work in a small team of highly skilled engineers on whole SDLC process – from understanding customers' needs, through solutioning and design to coding, testing and maintaining our software. Our hybrid model of working includes two days (minimum) in our Copenhagen office and up to three days working remotely. Codebase includes a mix of C#, OCaml and APL which gives broad opportunities to upskill and drive your career with us. We invest a lot in your understanding of both the technical details of the solution and financial knowledge that will allow you to contribute to building the future of asset management.

• 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)
• MyBenefit Cafeteria with a monthly budget provided by SimCorp, which can be used to finance a Multisport card (with a 25% employee contribution) or choose other lifestyle options
• 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

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

Visit our career pages to learn more about working at SimCorp: www.simcorp.com/career