09/09/2026 updated
100 % available
Senior Backend Engineer | Python, Kafka, AWS, Distributed Systems
Nigüelas, Spain
Worldwide
BSc in Computer ScienceAbout me
Senior Backend Engineer with 5+ years of experience building distributed Python systems, event-driven architectures and cloud platforms on AWS. Currently focused on backend, former Full-Stack (CSS kicked me out). Based in Spain, open to relocation to Germany or 100% remote
AI AgentsAmazon CloudfrontAmazon S3Test AutomationCloud DatabaseDistributed DevelopmentAmazon DynamoDBPython (Programming Language)RabbitMQAWS CLITypeScriptS3 BucketTest-Driven Development (TDD)BackendFastAPI
Python Backend Development
Extensive experience building high-throughput backend services and microservices using Python, FastAPI, Flask, and Django REST, deployed across AWS, Azure, and GCP environments.
Distributed Systems & Kafka
Deep expertise in designing and operating distributed streaming architectures with Apache Kafka and Amazon MSK, handling 100K+ sustained events per second and reducing infrastructure costs significantly.
Cloud Infrastructure & AWS
Hands-on experience designing AWS media workflows, containerized deployments with Docker, Kubernetes and Helm, and managing cloud-native services including Amazon MSK and event-driven architectures.
PostgreSQL & MongoDB
Proficiency in relational and document databases, including schema design, migration management, and integration with production microservices.
GraphQL & API Design
Experience building tenant-scoped GraphQL tools and RESTful APIs for multi-tenant SaaS platforms and internal product workflows.
CI/CD & DevOps
Ownership of release pipelines from application versioning through environment promotion, including diagnosis of deployment failures and stabilization of CI through improved test architecture.
Applied AI & RAG
Building multi-tenant MCP platforms with token-derived isolation and Retrieval-Augmented Generation over large knowledge bases such as Confluence pages.
Angular & Full Stack Development
Development of Angular frontend features and modules alongside backend services for multi-tenant SaaS platforms and client-facing product workflows.
Third-Party Integrations
Delivery of integrations with Shopify, LinkedIn, and Google, as well as event-driven AWS workflows and containerized cloud deployments.
Extensive experience building high-throughput backend services and microservices using Python, FastAPI, Flask, and Django REST, deployed across AWS, Azure, and GCP environments.
Distributed Systems & Kafka
Deep expertise in designing and operating distributed streaming architectures with Apache Kafka and Amazon MSK, handling 100K+ sustained events per second and reducing infrastructure costs significantly.
Cloud Infrastructure & AWS
Hands-on experience designing AWS media workflows, containerized deployments with Docker, Kubernetes and Helm, and managing cloud-native services including Amazon MSK and event-driven architectures.
PostgreSQL & MongoDB
Proficiency in relational and document databases, including schema design, migration management, and integration with production microservices.
GraphQL & API Design
Experience building tenant-scoped GraphQL tools and RESTful APIs for multi-tenant SaaS platforms and internal product workflows.
CI/CD & DevOps
Ownership of release pipelines from application versioning through environment promotion, including diagnosis of deployment failures and stabilization of CI through improved test architecture.
Applied AI & RAG
Building multi-tenant MCP platforms with token-derived isolation and Retrieval-Augmented Generation over large knowledge bases such as Confluence pages.
Angular & Full Stack Development
Development of Angular frontend features and modules alongside backend services for multi-tenant SaaS platforms and client-facing product workflows.
Third-Party Integrations
Delivery of integrations with Shopify, LinkedIn, and Google, as well as event-driven AWS workflows and containerized cloud deployments.
Experience
Professional experience5 - 10 years
Freelancer since2026
Languages
EnglishFluentFrenchGoodSpanishNative speaker
Project history
Led the redesign of playback telemetry for 100K+ sustained events/sec, publishing directly to Kafka and removing RabbitMQ from the critical path. Migrated managed Kafka from Confluent Cloud to Amazon MSK, reducing streaming costs 80%. Built a Kafka-based viewing-progress service for a seven-figure user platform using event coalescing to reduce Redis write pressure. Designed AWS media workflows spanning live ingestion, adaptive delivery, clipping, transcoding and transcription. Built a multi-tenant MCP platform with token-derived isolation, tenant-scoped GraphQL tools, human approval for writes and RAG over 100+ Confluence pages.
Developed and operated 10+ production microservices with Python/FastAPI and PostgreSQL on AWS, using Docker, Kubernetes and Helm. Owned releases from application versioning through environment promotion; diagnosed and resolved failures caused by incorrectly applied database migrations.
Built Python/FastAPI services and Angular features for a multi-tenant SaaS platform serving approximately 30 customer organizations. Delivered Shopify, LinkedIn and Google integrations plus event-driven AWS workflows and containerized cloud deployments.