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Hi, I’m Ernest Tsamo, a senior backend engineer with 8+ years building and shipping production systems across health care, media, fintech, and AI. I love clean code, robust APIs, and designing systems that are easy to reason about. I’ve got a strong foundation in Python and Django, with hands-on experience in FastAPI, microservices, event-driven architecture, and cloud infrastructure (AWS, GCP). I’m comfortable leading technically, working across the stack when needed, and taking ownership from design through deployment. I value code quality, clear APIs, and maintainable systems that teams can rely on.…Hi, I’m Ernest Tsamo, a senior backend engineer with 8+ years building and shipping production systems across health care, media, fintech, and AI. I love clean code, robust APIs, and designing systems that are easy to reason about. I’ve got a strong foundation in Python and Django, with hands-on experience in FastAPI, microservices, event-driven architecture, and cloud infrastructure (AWS, GCP). I’m comfortable leading technically, working across the stack when needed, and taking ownership from design through deployment. I value code quality, clear APIs, and maintainable systems that teams can rely on.

Ernest Tsamo

Back-End Developer, Full Stack Developer, Data Scientist, +3

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Hi, I’m Ernest Tsamo, a senior backend engineer with 8+ years building and shipping production systems across health care, media, fintech, and AI. I love clean code, robust APIs, and designing systems that are easy to reason about. I’ve got a strong foundation in Python and Django, with hands-on experience in FastAPI, microservices, event-driven architecture, and cloud infrastructure (AWS, GCP). I’m comfortable leading technically, working across the stack when needed, and taking ownership from design through deployment. I value code quality, clear APIs, and maintainable systems that teams can rely on.…Hi, I’m Ernest Tsamo, a senior backend engineer with 8+ years building and shipping production systems across health care, media, fintech, and AI. I love clean code, robust APIs, and designing systems that are easy to reason about. I’ve got a strong foundation in Python and Django, with hands-on experience in FastAPI, microservices, event-driven architecture, and cloud infrastructure (AWS, GCP). I’m comfortable leading technically, working across the stack when needed, and taking ownership from design through deployment. I value code quality, clear APIs, and maintainable systems that teams can rely on.

Available to hire

Hi, I’m Ernest Tsamo, a senior backend engineer with 8+ years building and shipping production systems across health care, media, fintech, and AI. I love clean code, robust APIs, and designing systems that are easy to reason about. I’ve got a strong foundation in Python and Django, with hands-on experience in FastAPI, microservices, event-driven architecture, and cloud infrastructure (AWS, GCP).

I’m comfortable leading technically, working across the stack when needed, and taking ownership from design through deployment. I value code quality, clear APIs, and maintainable systems that teams can rely on.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

French

Fluent

Dutch

Beginner

German

Beginner

Work Experience

Tech Lead to CTO at Colorful

August 1, 2020 - Present

Tech Lead to CTO designing and deploying scalable microservices on AWS, architecting a distributed backend with event-driven patterns (RabbitMQ, Kafka), implementing advanced caching, sharding-based PostgreSQL schema, and data pipelines to support millions of users. Led GDPR/privacy-compliance initiatives and consent management while fostering cross-team collaboration to deliver secure, maintainable systems.

Senior Backend Developer (Freelance) at EnHarmony

July 1, 2019 - August 31, 2020

Engineered Django REST Framework APIs with encryption and JWT authentication; improved PostgreSQL performance via indexing and partitioning to achieve ~50% faster response times; designed Redis caching with expiration strategies and key-space notifications; implemented HIPAA-compliant encryption and access controls; collaborated with frontend teams to deliver responsive React.js dashboards.

Senior Full Stack Engineer (Freelance) at Zebest

April 1, 2018 - June 30, 2019

Designed load-balanced APIs on AWS Elastic Beanstalk with sharding for high transaction volumes; automated CI/CD pipelines with GitLab; developed Vue.js front-end UIs; ensured reliability with Elastic Load Balancing; enhanced backend data structures and query performance; implemented backend scaling and messaging with RabbitMQ and Redis.

Senior Full Stack Engineer at Health Sync

April 1, 2016 - August 31, 2017

Designed real-time medical imaging APIs using Django REST Framework and ASGI (Daphne); automated infrastructure provisioning with Terraform on AWS; implemented HIPAA-compliant encryption and access controls; built robust data processing pipelines for large-scale medical datasets; collaborated with frontend to integrate diagnostic features into React dashboards.

Senior Full Stack Engineer (Freelance) at Tip It

November 1, 2015 - April 1, 2016

Designed ARIMA-based predictive analytics to forecast content engagement, improving user retention; containerized microservices with Kubernetes for scalable deployment; implemented Celery for asynchronous task handling; built analytics dashboards with Vue.js; established Jenkins CI/CD pipelines for microservices.

Senior Django Developer (Freelance) at Enharmony

July 1, 2019 - August 1, 2020

Built robust REST APIs using Django REST Framework, implemented encryption and access controls for HIPAA-compliant healthcare data, and collaborated with frontend teams to deliver responsive UX. Led containerized deployments and contributed to CI/CD improvements to shorten release cycles while preserving data integrity.

Senior Full Stack Engineer (Freelance) at Jury of Peers

September 1, 2017 - March 1, 2018

Built real-time system features using Django Channels and Redis for live updates. Executed high-availability deployments on Kubernetes clusters and implemented event-driven messaging with RabbitMQ to improve system responsiveness and reliability.

Senior Backend Engineer (Freelance) at Tip It

November 1, 2015 - April 1, 2016

Developed predictive analytics models to forecast content engagement. Containerized microservices with Kubernetes, implemented task queues with Celery, and built analytics dashboards with Vue.js. Established CI/CD pipelines using Jenkins for automated testing and deployment.

Senior Full Stack Engineer at MultiTech

March 1, 2025 - Present

Remote role in Germany. Migrated codebase from Django 5 to Django 6 and Python 3.12 to 3.14 with zero production regressions and ~20% CI build time reduction; shipped configurable label printing for logistics cutting setup time ~35% and removing manual steps; built AI-assisted e-invoice module with embedded ZUGFeRD/XRechnung XML saving 3-4 hours of weekly reconciliation; added real-time driver notes system via Django Channels reducing communication lag to under 3 seconds; automated FTP/BNN supplier file ingestion, cutting manual processing time ~60% and removing import errors; set up AI documentation workflow using Claude Code with Notion and internal Markdown reducing doc turnaround from days to under an hour; built AI-assisted code review tool tailored to project conventions reducing review cycles ~30%; wrote local dev scripts to spin up full stack, reducing onboarding from half a day to under 20 minutes.

Senior Backend Developer at Vail AI

November 1, 2025 - February 1, 2026

Remote contract in UAE. Built core real-time AI media pipeline using Server-Sent Events; developed API layer with FastAPI, asynchronous SQLAlchemy, and Pydantic v2 validation improving edge-case data error rates (~30% reduction); integrated Stripe billing with Celery for async processing; deployed and maintained containerized services on GCP, reducing provisioning time ~40%; integrated ML inference endpoints with batching and async queuing improving average generation response time ~35%.

Tech Lead at Colorful

August 1, 2020 - Present

Remote tech lead role from Paris, France. Designed platform architecture from scratch on AWS with RabbitMQ and Kafka across services; introduced Redis caching with LFU/LRU eviction and cache warming reducing API response times by 60%; architected a sharded PostgreSQL schema for high concurrency with zero data loss; integrated PyTorch models for audio spectral analysis and lossless compression reducing storage costs; led engineering pivots during growth while keeping codebase maintainable; drove GDPR compliance (anonymization, consent flows, right-to-erase) with legal translating requirements into implementations.

Senior Django Developer at Enharmony

July 1, 2019 - August 1, 2020

Remote freelance role in Miami, USA. Built and maintained REST APIs with Django REST Framework and JWT authentication; tuned PostgreSQL performance via indexing and partitioning reducing high-traffic endpoint response times by ~50%; implemented HIPAA-compliant data handling (encryption at rest, RBAC, audit logging); set up Redis caching with TTL logic and keyspace notifications to reduce DB pressure and improve session throughput.

Senior Django Developer at Zebest

April 1, 2018 - June 1, 2019

Remote freelance role in Switzerland. Designed load-balanced APIs on AWS Elastic Beanstalk with RabbitMQ and Kafka for cross-service communication; introduced Redis caching with LFU/LRU eviction and cache warming; architected shard PostgreSQL schema; integrated PyTorch models for audio spectral analysis and lossless compression to reduce storage costs without perceptible quality loss.

Senior Django Developer at Jury of Peers

September 1, 2017 - March 1, 2018

Remote freelance role in USA. Implemented real-time WebSocket features with Django Channels and Redis; deployed a Kubernetes cluster with horizontal auto-scaling; offloaded compute-heavy tasks to RabbitMQ asynchronous workers; set up Prometheus and Grafana dashboards for system observability to identify and resolve issues proactively.

Mid-level Full Stack Engineer at Health Sync

April 1, 2016 - August 1, 2017

Remote freelance role in USA. Built asynchronous APIs for real-time medical imaging workflows using Django REST Framework with ASGI (Daphne); HIPAA-compliant infrastructure setup with Terraform across dev, staging, and production; developed data ingestion pipelines with validation at each stage to improve throughput and data integrity; collaborated with frontend to integrate imaging features in React dashboards.

Backend / ML Developer at Tip It

November 1, 2015 - April 1, 2016

Remote freelance role in USA. Developed ARIMA-based forecasting models for content engagement; decomposed monolith into Dockerized microservices on Kubernetes enabling independent component scaling; set up Celery task queues with retry logic to maintain low failure rates; configured Jenkins CI/CD pipelines with automated testing gates to improve coverage and reduce production bugs.

Tech Lead at Colorfol

August 1, 2020 - Present

Designed distributed architecture from scratch on AWS with RabbitMQ and Kafka for event-driven communication; introduced Redis caching; created a sharded PostgreSQL schema; integrated PyTorch models for audio analysis; led engineers through product pivots while keeping codebase stable.

Senior Developer at Zebest

April 1, 2018 - June 1, 2019

Designed scalable APIs on AWS Elastic Beanstalk with Redis caching and load balancing; integrated PyTorch-based ML components; led architecture pivots to support growing demand.

Senior Developer at Jury of Peers

September 1, 2017 - March 1, 2018

Implemented real-time WebSocket features with Django Channels and Redis; deployed a Kubernetes cluster with horizontal auto-scaling; offloaded compute-intensive tasks to RabbitMQ workers; set up Prometheus and Grafana dashboards for monitoring.