thyll.muller()

/// Senior software engineer

/// Building high-performance trading platforms where resilience and precision matter.

/// Bilingual: English / German.

public class THYLL_MULLER

{

public string ROLE = "Senior Software Engineer";

public string COMPANY = "JPMorgan Chase";

public string FOCUS = "Python, modern web technologies, and backend systems";

I’m a Senior Software Engineer at JPMorgan Chase, building high-performance trading platforms where resilience and precision matter. I specialise in Python, modern web technologies, and backend systems, turning complex, business-critical workflows into clear, maintainable products that perform reliably in production.

public static class EXPERIENCE

{

JPMorganChase()

var period = "2023 to Present"; // High-volume trading & risk systems

Senior Associate Software Engineer (SWE III)

Delivered major trading-platform initiatives in a regulated environment, combining product ownership, delivery leadership, and operational support.

Bond Portfolio TRS Athena migration
  • Led the design and delivery of the trade-capture UI for the Bond Portfolio TRS migration to Athena, replacing an error-prone legacy booking workflow with a modern, resilient interface.
  • Enabled the desk to scale while reducing trade-booking time and improving workflow efficiency.
  • Supported the full go-live lifecycle from instrument build through trade capture, pricing, and lifecycle management, improving reporting accuracy for Operations, Risk, and P&L.
Legacy trading platform tactical modernisation
  • Contributed to the migration of a long-established monolithic trading platform to a cloud-native Java backend and TypeScript/React frontend.
  • Migrated financial instruments while achieving behavioural and risk parity through comprehensive regression testing and integration with existing trading infrastructure.
  • Used AI-assisted reverse engineering to accelerate analysis and implementation of legacy functionality where subject matter expertise was no longer available.
  • Developed cloud-based (AWS) risk calculation services, improving platform scalability, resilience, and long-term maintainability.
General engineering impact
  • Championed continuous engineering improvements by refactoring large monolithic modules into focused, well-tested components.
  • Reduced commit contention and workflow pileup despite increased development activity.
  • Supported first-of-its-kind exotic derivative trade bookings.
  • Managed a summer intern to build an automation framework for lower-environment trade bookings to accelerate developer and QA testing.

Junior Associate Software Engineer (SWE II)

Credit Derivative Flow bulk trade management

Built and shipped new bulk trade-management capabilities for Credit Derivative Flow products within Athena, improving workflow accuracy and reducing reliance on manual operations.

  • Designed and implemented GraphQL APIs and front-end view models to support complex trade-management workflows across Athena Trade and Risk systems.
  • Replaced fragile, generic operational processes with dedicated tooling that reduced manual intervention.
  • Provided high-priority production support for CDS and index products, while owning quarterly IMM processing.

Waracle()

var role = "Junior Python Developer"; // Sep 2022 to Apr 2023 · Global pharmaceutical company · data pipelines

Supported a global pharmaceutical company in building and testing data pipelines for a mobile drug-testing application, helping maintain reliable data flows as the programme progressed into further trial phases.

  • Wrote unit and integration tests and created custom APIs to interact with Azure Cosmos DB.
  • Configured Docker containers to mirror client infrastructure for strict testing requirements.
  • Worked within a large agile delivery team using version control and collaborative engineering practices.

IBM()

var role = "Conversational Analyst"; // Mar 2022 to Sep 2022 · Government financial institution · NLP user support

Contributed to the early build-out of NLP capabilities for user support at a government financial institution, helping translate client requirements into practical conversational-AI improvements.

  • Helped build conversational AI capabilities using NLP and NLU to support clearer, more reliable user journeys.
  • Worked closely with clients to translate requirements into practical, production-ready solutions.

// Selected contributions · Engineering work in practice.

public enum CONTRIBUTIONS

{

Workflow modernisation

Delivered user-facing improvements for complex, regulated workflows.

Legacy systems

Contributed to modernising established platforms and strengthening maintainability.

Production support

Supported reliable operation of time-sensitive, business-critical processes.

Team enablement

Improved engineering workflows and created automation to support development and testing.

// Engineering philosophy · How I approach building software.

private string EngineeringPhilosophy()

{

return "I enjoy simplifying complex systems into maintainable products that are dependable in production. My focus is on delivering software that is reliable, easy to evolve, and backed by measurable outcomes. I care about ownership, clear architecture, and engineering practices that help teams move quickly without sacrificing quality.";

public static class EDUCATION

{

UniversityOfStrathclyde()

var degree = "Data Analytics MSc. (Distinction, 82%)"; // Sep 2021 to Sep 2022

  • Specialised in artificial intelligence, machine learning, and deep learning.
  • Worked with Python, R, SQL, TensorFlow, PyTorch, Scikit-learn, and XGBoost.

UniversityOfGlasgow()

var degree = "Pharmacology BSc. (Hons) (2:1)"; // Sep 2017 to Jul 2021

My scientific training led naturally into data analytics and, ultimately, software engineering: a path grounded in rigorous analysis, experimentation, and problem-solving.

  • Built strong foundations in experimental design, statistics, and scientific analysis.
  • Completed an honours project on vitamin D and COVID-19 morbidity and mortality.

public void Connect()

{

// Interested in discussing engineering, distributed systems, AI, or opportunities? Feel free to get in touch.

EmailPhoneLinkedInGitHubRequest CV
}
}