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Piotr Liwerski

@piotrliwerski

Senior Software Engineer at GlobalLogic who delivered a multi-provider gRPC payment service and migrated 20 services to Kubernetes.

Poland

Message

At GlobalLogic, I own and maintain production payment services, including Django and FastAPI APIs, gRPC services, and Kafka integrations. I delivered a multi-provider abstraction for a high-volume payment service, integrating a second provider and removing vendor lock-in.

I also led the migration of around 20 services to Kubernetes with Helm and built an HTTP API that integrates a Hugging Face model for check fraud detection. I develop features for internal payment applications using Python and React.

Before GlobalLogic, I worked across healthcare, automotive, iGaming, and e-commerce projects. At Spyrosoft, I led two developers building an async FastAPI service; at Merixstudio, I built analytics and real-time features for an online casino platform.

Experience

Work history, roles, and key accomplishments

Current

Senior Python Developer

Current

GlobalLogic

Aug 2022 - Present (4 years 3 months)

Own and maintain around 20 production services for payment processing, including Django and FastAPI REST APIs, gRPC services, and Kafka producers/consumers. Led migration of services to Kubernetes and designed a multi-provider abstraction for a high-volume payment service.

Python Django fastAPI Flask gRPC Kafka React JavaScript Jest Cython Docker Kubernetes Helm Prometheus S3 Hugging Face Locust

Python Software Engineer

Spyrosoft

Oct 2021 - Jul 2022 (9 months)

Delivered 5-7 client projects in automotive, healthcare, and geospatial domains. Led a team building an async FastAPI service and co-designed a serverless architecture on AWS for a healthcare application.

Python Django DRF fastAPI Celery PostgreSQL MongoDB AWS Lambda Step Functions Amazon SQS DynamoDB Django Templates

Regular Python Web Developer

Merixstudio

Oct 2020 - Oct 2021 (1 year)

Backend developer on an online casino platform handling up to 1000 concurrent WebSocket connections per casino. Built analytics on bet data and improved back-office performance through SQL optimization and async processing.

Python Django DRF Celery WebSockets Elasticsearch Redis PostgreSQL Kubernetes React JavaScript

Python Web Developer

Deployed

Mar 2020 - Jul 2020 (4 months)

Developed web applications for clients using Django and DRF, and extended an existing GraphQL API. Improved code quality tooling and GitLab CI/CD pipelines.

Python Django DRF GraphQL

Software Developer

Philip Morris International

Mar 2019 - Mar 2020 (1 year)

Developed a Flask microservices platform for validating mobile event apps and publishing them to app stores. Built SOAP microservices for factory machine integration and integrated an ML model for template detection.