Anton – Python, React, Node.js

A client portal and supporting infrastructure designed to facilitate daily trading operations for professional trading firms. The platform provides clients with access to essential trading-related services and operational tools, helping streamline workflows, improve visibility into trading activities, and ensure reliable access to critical information and services.

• Architected and delivered a high-throughput distributed reporting platform serving over 100 professional trading firms worldwide;
• Designed event-driven processing and scalable worker pools to generate reports ranging from 1 MB to 500 MB reliably and in parallel;
• Implemented time-zone-aware scheduling and configurable report delivery intervals through a customer-facing UI;
• Developed operational dashboards to monitor worker performance, memory usage, and throughput in real time;
• Led the full client migration from the legacy reporting platform;
• Migrated a failing trading-data synchronization pipeline to dedicated worker-based processing, reducing report availability time from 15–30 minutes to near-immediate delivery.

A real-time trading platform designed to support trade execution and provide traders with visibility into trade performance across global financial markets. The platform combines backend services with desktop and web applications, enabling efficient trading workflows, end-to-end trade traceability, and reliable data auditing. Its modular architecture supports consistent development and integration of new services, helping trading teams improve operational efficiency and make informed decisions.

• Designed and developed a real-time platform supporting trade execution and providing traders with greater visibility into trade performance;
• Built a modular suite of services and contributed to a shared framework for consistent development of applications and services across teams;
• Developed end-to-end traceability to track trades and related data across the platform;
• Implemented logging, auditing, and automated tests to protect data integrity;
• Developed backend services and desktop and web tooling using Python, Go, gRPC, React, TypeScript, Node.js, and Electron;
• Collaborated directly with traders to identify and prioritize practical improvements;
• Mentored junior engineers and maintained code quality through code reviews.

An internal customer-service CRM platform used by call-center agents and retail staff at one of the largest telecom providers in the Netherlands. The platform unifies customer interactions across public chat, chatbot conversations, and CRM chat, providing a centralized workspace for customer support and daily service operations.

• Designed and developed backend systems for a desktop CRM used daily by over 4,000 customer-support employees across contact centres and retail locations;
• Contributed to desktop application development as part of a team of more than eight engineers;
• Integrated public chat, chatbot conversations, and CRM chat into a unified customer-support workspace;
• Developed internal CRM workflows and supported reliable service operations;
• Automated dashboard generation from microservice source code;
• Implemented real-time monitoring and on-call alerting;
• Developed deployment pipelines enabling rapid, zero-downtime releases across multiple nodes;
• Established a beta environment for early feature testing and agent feedback before wider rollout.

A fintech platform providing banking services to clients through web applications accessible on mobile devices. The platform includes a JavaScript SDK for iOS that enables web-based applications to run on mobile devices without requiring separate native app development, allowing teams to extend and maintain digital banking experiences efficiently.

• Contributed to a JavaScript SDK for iOS, enabling web applications to run on mobile devices without requiring separate native app development;
• Implemented new platform functionality using TypeScript, MySQL, Python, and Java;
• Collaborated with a team of more than five engineers to extend the fintech platform;
• Created a command-line tool to bootstrap new front-end projects with a consistent structure and reduce setup effort.