Furkan Kalinsaz
Verified Expert in Engineering
Full-stack Engineer and Developer
Bern, Switzerland
Toptal member since February 18, 2026
Furkan is a senior full-stack engineer with nine years of experience building scalable platforms across SaaS, IoT, and cultural heritage domains. He architected a multi-tenant digital collections platform serving 50+ museums across Europe and built real-time IoT monitoring systems compliant with 21 CFR Part 11. Furkan thrives as a core contributor, taking ownership from architecture to deployment. His primary stack is Django, Vue, PostgreSQL, and Kubernetes.
Portfolio
Experience
- PostgreSQL - 9 years
- Software Engineering - 9 years
- JavaScript - 9 years
- Python - 9 years
- Vue - 7 years
- Django - 5 years
- TypeScript - 3 years
- NestJS - 3 years
Preferred Environment
Django, Vue, Nuxt.js, PostgreSQL, Python, REST APIs, NestJS, TypeScript, Docker, Kubernetes
The most amazing...
...thing I've developed is a digital collections platform serving 50+ museums across Europe and a real-time IoT system powering industrial sensor networks.
Work Experience
Full-stack Engineer
A Swiss Software Company
- Built a custom query language and advanced search system with tree-based hierarchical filtering, compound search queries via Solr, and a generic server-side table architecture reused across the entire platform.
- Architected an image processing server with compression, thumbnail generation, resumable uploads, and a custom viewer, along with a Word and PDF export system using configurable templates.
- Created an audit logging system, a bulk mutation engine for mass editing operations, and a generic entity architecture that eliminated thousands of lines of duplicated code across the codebase.
- Developed a data transfer and relation management module handling complex entity relationships, mass transfers with configurable field strategies, and polymorphic event logging.
- Led Django 5 and Python 3.13 upgrades, migrated all dependency management to Poetry, and introduced Celery workers for background task processing.
- Led the Vue 3 migration of the public web front end, replacing Cypress with Playwright, and rebuilt the entire service architecture within the monorepo from scratch.
- Created a PDF generator microservice with batch image processing and configurable cover page templates. Integrated it into the ordering system for customer-facing document delivery.
Python Data Annotator
Pareto.AI
- Evaluated and annotated LLM-generated outputs for accuracy, relevance, and code correctness across Python and data processing tasks.
- Performed structured data validation using Python and Excel to verify AI model responses against expected outputs and quality benchmarks.
- Contributed to improving large language model performance through systematic human feedback and annotation workflows.
Full-stack Engineer
Proxify
- Architected the core back end of an enterprise IoT platform using NestJS and TimescaleDB, building real-time sensor ingestion, multi-channel alert notifications, and schedule-based threshold evaluation as the primary back-end contributor.
- Designed a streaming export microservice in Python and FastAPI with connection pooling, enabling PDF and XLSX generation at scale. Implemented CI/CD pipelines, Docker and Kubernetes deployments, and Nginx optimizations.
- Built comprehensive E2E test coverage using Jest and Playwright across all critical back-end services, ensuring a reliable and audit-compliant system aligned with 21 CFR Part 11 regulatory requirements.
- Engineered real-time data streaming infrastructure using WebSockets and Redis pub/sub, enabling cross-process event distribution for live sensor updates across the monitoring dashboard.
- Implemented multi-tenant device visibility and entity ownership isolation, enabling shared device access control across accounts and user groups in a SaaS environment.
- Built the alarm management system with suppression, acknowledgment workflows, and per-device breakdown APIs, integrated with automated email and SMS escalation pipelines.
Full-stack Engineer
Openzeka
- Led full-cycle development of the Cordatus.ai IoT management platform, serving as the lead engineer from early-stage prototype to production.
- Built and maintained a real-time Stream engine and Inference engine, enabling deep learning model deployment on edge devices.
- Developed back-end services using Node.js and Flask, designing RESTful APIs for device management and model orchestration.
- Created communication algorithms for autonomous vehicles, enabling the exchange of deep learning outcomes between systems over cloud and local networks.
Experience
IoT Sensor Monitoring and Alerting Platform
I architected the NestJS back end, comprising 20+ modules including configurable alarm profiles with schedule-based threshold evaluation, a multi-channel notification engine delivering alerts via email, SMS, push notifications, and webhooks, and real-time dashboards powered by WebSocket streaming through Redis pub/sub. I also built a standalone Python/FastAPI export microservice with streaming PDF and XLSX report generation, connection pooling, and concurrency control. The platform includes role-based access control, comprehensive audit trails aligned with 21 CFR Part 11 regulatory compliance, and a full CI/CD pipeline with Docker, Kubernetes, and GitHub Actions.
Digital Archive and Collection Management Platform
I also developed standalone microservices for file conversion, PDF generation with batch processing, and ETL pipelines handling multiple data formats. On the front end, I led the Vue 3 migration of the public-facing portal and built core UI components using Nuxt and Vuetify. The platform uses PostGIS for spatial data, Solr for full-text search, and Celery for background task processing. It is deployed on Kubernetes with Docker and is internationalized across five languages.
Beatscribe - AI Audio Mastering Platform
Education
Bachelor's Degree in Electrical Engineering
Gazi University - Ankara, Turkey
Skills
Libraries/APIs
Vue, Playwright, REST APIs, Node.js, API Development, Vue 3, Leaflet, TensorFlow, React, OpenAPI, NumPy, SendGrid API, SQLAlchemy, OpenCV, PyTorch, Twilio API, OpenAI API
Tools
Git, Claude Code, Docker Compose, RabbitMQ, Celery, Terraform, Prisma, Amazon EKS, MQTT, Amazon Simple Notification Service (SNS), Apache Solr, NGINX, You Only Look Once (YOLO), Sentry
Languages
Python, JavaScript, TypeScript, HTML, CSS, HTML5, Python Script, SCSS
Frameworks
NestJS, Django, Nuxt.js, Flask, Swagger, JSON Web Tokens (JWT), Nuxt 3, Electron, Tailwind CSS, Jest, Django REST Framework, Vuetify, Next.js
Paradigms
Microservices Architecture, Test-driven Development (TDD), Back-end Architecture, Microservices, Unit Testing, Continuous Integration (CI), Continuous Delivery (CD), ETL, Database Design, Desktop App Development
Platforms
Docker, Amazon Web Services (AWS), Kubernetes, Linux, Amazon EC2, Twilio, Google Cloud Platform (GCP)
Storage
PostgreSQL, Redis, Databases, JSON, PostGIS, SQLite, Amazon S3 (AWS S3), Data Pipelines
Other
Software Engineering, Full-stack Development, Web Development, API Integration, Bug Fixes, CI/CD Pipelines, Server-side Rendering (SSR), Software Architecture, System Architecture, RESTFul APIs, Front-end, Back-end Development, Full-stack, APIs, Containerization, Content Management Systems (CMS), Scripting, Back-end, OAuth, Data Visualization, Front-end Development, Architecture, AI Model Training, Performance Optimization, Wagtail CMS, Machine Learning, Computer Vision, FastAPI, QR Codes, Internet of Things (IoT), Computer Science, Argo CD, GitOps, Nodemailer, ETL Tools, Code Review, Data, Scalable Architecture, AI Programming, Artificial Intelligence (AI), Pinia, Tailwind UI, SaaS, Statistics, AI Agents, ETL Pipelines, Robot Operating System (ROS), Large Language Models (LLMs), TimescaleDB, WebSockets, TypeORM, GitHub Actions, Single Sign-on (SSO), Identity & Access Management (IAM), AI Integration, AI Design, Facial Recognition, Data Annotation
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