M
Marek Spychalski
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Bytom, Silesian Voivodeship, Poland
Résumé
Jobs
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Senior Full Stack EngineerRunwaySep 2023 - Current (3 years 2 months)Leading backend architecture and AI-enabled platform capabilities for a scalable web application, defining API standards, data models, and infrastructure decisions. Defined backend architecture for core platform services using Node.js and NestJS, establishing modular boundaries, API versioning strategy, and scalable deployment patterns. Architected event-driven workflows with Kafka and Redis queues to process notifications and background jobs with deterministic processing guarantees. Designed relational and NoSQL schemas in PostgreSQL and MongoDB, introducing indexing and caching strategies that reduced query latency. Implemented RESTful and GraphQL APIs for user, permissions, and records domains, enforcing rate limiting and consistent pagi- Full Stack EngineerCSharkJul 2022 - Jul 2023 (1 year 1 month)Designed and evolved backend services for a distributed SaaS learning platform, focusing on scalable APIs, data modeling, and authentication workflows. Designed RESTful APIs in Node.js supporting course management, user analytics, and third-party integrations within a distributed SaaS architecture. Modeled MongoDB collections for high-volume learning content, introducing compound indexes that reduced read latency under concurrent access. Implemented authentication and authorization workflows with role-based access control, securing multi-tenant endpoints across backend services. Built asynchronous processing pipelines using RabbitMQ to handle progress tracking and notification dispatch without blocking core requests. Refactored server-side
- Full Stack DeveloperDREAMIXMay 2019 - Apr 2022 (3 years)Delivered backend services and architectural patterns for healthcare platforms, emphasizing modular design, auditability, and secure data processing. Owned service architecture for patient records and appointment coordination modules using Python and Django with clearly defined REST contracts. Designed audit logging and role-based access control mechanisms to ensure traceability and compliance across sensitive healthcare workflows. Standardized configuration and dependency management across services, reducing environment drift and simplifying cross-service deployments. Implemented GraphQL endpoints alongside REST APIs, enabling flexible client queries while preserving strict backend validation rules. Optimized PostgreSQL queries with indexi
- WBackend DeveloperWiser TechnologySep 2016 - Apr 2019 (2 years 8 months)Contributed to backend service architecture and platform reliability patterns for business-critical enterprise workflows. Strengthened core domain models in Python services, clarifying service boundaries and improving consistency of business-critical workflows. Implemented API versioning and structured error handling standards, reducing integration ambiguity for consuming client applications. Introduced monitoring hooks and health-check endpoints, increasing visibility into service reliability and runtime behavior. Collaborated on database schema evolution in PostgreSQL, ensuring backward compatibility during iterative feature releases. Refactored legacy modules into modular components, simplifying unit testing and enabling safer incrementa
Education
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- M.S. in Computer ScienceTechnical University of SofiaOct 2014 - Jun 2016 (1 year 9 months)
- B.S. in Computer ScienceTechnical University of SofiaSep 2010 - Jun 2014 (3 years 10 months)