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I am a Senior Software Engineer with 10+ years building Python and Node.js services across healthcare, eCommerce, and enterprise platforms. I design reliable AWS cloud integrations and SaaS workflows, delivering secure backend features using FastAPI, Django, TypeScript, PostgreSQL, and event-driven patterns. I own end-to-end delivery—from requirements clarification and bug fixing to cloud integration and scalable backend delivery for usage-driven products. I thrive in collaborative, Scrum-driven environments, advocating for automated testing, observability, and translating complex business rules into dependable service contracts.…I am a Senior Software Engineer with 10+ years building Python and Node.js services across healthcare, eCommerce, and enterprise platforms. I design reliable AWS cloud integrations and SaaS workflows, delivering secure backend features using FastAPI, Django, TypeScript, PostgreSQL, and event-driven patterns. I own end-to-end delivery—from requirements clarification and bug fixing to cloud integration and scalable backend delivery for usage-driven products. I thrive in collaborative, Scrum-driven environments, advocating for automated testing, observability, and translating complex business rules into dependable service contracts.

Artur Mazalewski

Full Stack Developer, Web Developer, Back-End Developer, +2

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I am a Senior Software Engineer with 10+ years building Python and Node.js services across healthcare, eCommerce, and enterprise platforms. I design reliable AWS cloud integrations and SaaS workflows, delivering secure backend features using FastAPI, Django, TypeScript, PostgreSQL, and event-driven patterns. I own end-to-end delivery—from requirements clarification and bug fixing to cloud integration and scalable backend delivery for usage-driven products. I thrive in collaborative, Scrum-driven environments, advocating for automated testing, observability, and translating complex business rules into dependable service contracts.…I am a Senior Software Engineer with 10+ years building Python and Node.js services across healthcare, eCommerce, and enterprise platforms. I design reliable AWS cloud integrations and SaaS workflows, delivering secure backend features using FastAPI, Django, TypeScript, PostgreSQL, and event-driven patterns. I own end-to-end delivery—from requirements clarification and bug fixing to cloud integration and scalable backend delivery for usage-driven products. I thrive in collaborative, Scrum-driven environments, advocating for automated testing, observability, and translating complex business rules into dependable service contracts.

Available to hire

I am a Senior Software Engineer with 10+ years building Python and Node.js services across healthcare, eCommerce, and enterprise platforms. I design reliable AWS cloud integrations and SaaS workflows, delivering secure backend features using FastAPI, Django, TypeScript, PostgreSQL, and event-driven patterns.

I own end-to-end delivery—from requirements clarification and bug fixing to cloud integration and scalable backend delivery for usage-driven products. I thrive in collaborative, Scrum-driven environments, advocating for automated testing, observability, and translating complex business rules into dependable service contracts.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at The Cervantes Group

October 1, 2024 - Present

Integration Modernization Platform: migrated legacy middleware to Python services with resilient AWS integrations; optimized ERP synchronization workers, reducing memory leaks and crash rate by ~50%. Restructured ingestion with SQS/Lambda and idempotent retries, cutting duplicates by ~40% across multi-tenant workloads. Implemented core APIs with FastAPI and Node.js/TypeScript services, separating synchronous reporting from asynchronous jobs for steadier throughput. Strengthened security with IAM boundaries, secrets rotation, audit logging, and least-privilege roles. Established GitHub Actions pipelines with container checks and deployment gates, shortening release verification by ~30%. Built AI incident summarization and semantic runbook tools using OpenAI, LangChain, and Pinecone to accelerate support.

Software Engineer at Signify Health

August 1, 2019 - September 30, 2024

Backend workflow services processing clinician visit data, scheduling events, and payer reporting. Built Python services with Django and FastAPI for intake, validation, and routing; improved background processing with SQS, Redis, and batching, reducing peak memory usage during large nightly jobs. Defined service boundaries, onboarding standards, and improved test coverage. Integrated storage and reporting pipelines for analytics and added Node.js/TypeScript services for partner integrations and notifications. Developed an AI summarization workflow to condense visit notes and a semantic search prototype with embeddings and Weaviate for clinical reference retrieval.

Full-Stack Software Developer at Shoplo

September 1, 2016 - May 31, 2019

Merchant Commerce Core: owned catalog and order synchronization components for a multi-tenant SaaS platform. Implemented backend features with Python/Django and Node.js services for webhooks; optimized queries and caching with PostgreSQL and Redis, reducing latency during campaign spikes. Integrated marketplace and payment APIs with retries and idempotency; expanded automated tests with Pytest and API fixtures. Improved monitoring and operational runbooks to shorten time-to-resolution during integration incidents.