Leon Meister

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Software Engineer

Modernizing legacy applications and building scalable, maintainable systems for the financial sector. Master's degree in Applied Computer Science, specializing in software engineering and architecture.

Experience

Finanz Informatik
Hannover, Germany
Feb 2025 - present
Software Engineer
Modernize legacy banking applications for the Sparkassen group on a Java and JavaScript stack, refactoring critical code and establishing engineering best practices. Coordinate technical decisions across departments and design concepts for application modernization. Onboard new developers ([X] to date) and conduct technical interviews.
Systemum GmbH & Co. KG
Braunschweig, Germany
Oct 2022 - Jun 2023, Mar 2024 - Jan 2025
IT Consultant
Focused on software architecture and modernization projects; led internal and external workshops on Software Product Line Engineering and Attribute-Driven Design. Built an internal prototype to standardize and streamline process documentation.
Stiftung Universität Hildesheim
Hildesheim, Germany
Apr 2019 - Sep 2022, Apr 2023 - Sep 2023
Research Assistant and Tutor
Held various positions including:
  • Assistant: Supervised and mentored students during Girl's Day 2023 and 2024
  • Tutor: Delivered tutorials on Software Engineering, Computer Science, and Java programming
  • Research Assistant: Developed tools for HAISEM-Lab and built a demonstrator for the DevOpt project; presented research at Hannover Messe 2023
  • Research Assistant: Conducted systematic literature reviews to support ongoing research
Gastro Instruments GmbH
Hildesheim, Germany
Apr 2019 - Jan 2020
Software Developer (TypeScript)
Developed the backend for a web-based management software for gastronomy businesses. During a mandatory three-month university internship, also built an Angular frontend for an internal tool.

Skills

Java
Advanced proficiency in Java, with extensive experience in both academic and extracurricular projects. Strong background in object-oriented programming and software architecture.
JavaScript/TypeScript
Experienced with modern JavaScript and TypeScript.

Frameworks: Angular, KoaJS, Express.js

Languages
Fluent in German (native) and English (C1). Currently learning Chinese.

Education

Stiftung Universität Hildesheim
Hildesheim, Germany
Apr 2021 - Apr 2025
Master of Science
Focused on software engineering and architecture. Final grade: 1.8 (German scale, 1.0 = best).

Projects

UML-Eval Framework
Developed a scalable "Hybrid Framework" (Dual-Strategy) to evaluate LLM-generated UML diagrams. It combines structural accountability via atomic triples and SBERT embeddings with semantic flexibility through a 5-run LLM ensemble. Validated across 675 generations, the framework quantified quality differences and demonstrated the efficacy of one-shot prompting.
C-MergeOPtimizer
CMOP was developed as part of my bachelor thesis titled "Search-based Optimization of Merge Results in C-Software". The given merge results do not delete any code, as they are generated automatically by a different tool. CMOP then utilizes genetic programming and test cases to mutate the code in order to fit the specification (i.e. test cases). CMOP is merely an experiment to examine the applicability of genetic programming on configurable C-preprocessor based systems.

Interests

Software architecture, microservices, adaptive systems, knowledge sharing

Hobbies

Reading (mostly history), Cooking, Chess and video games