Backend engineer with 4+ years of production experience shipping scalable systems, real-time data pipelines, and SaaS platforms. Strong ownership mindset across design, deployment, and operations, with a track record of building and maintaining commercial products from day one. Specialized in async FastAPI architecture, PostgreSQL optimization, event-driven systems, and GPU-accelerated workloads. Experienced in building reliable background pipelines, multi-tenancy, observability, and production-grade APIs and systems.…

Panagiotis Panageas

Backend engineer with 4+ years of production experience shipping scalable systems, real-time data pipelines, and SaaS platforms. Strong ownership mindset across design, deployment, and operations, with a track record of building and maintaining commercial products from day one. Specialized in async FastAPI architecture, PostgreSQL optimization, event-driven systems, and GPU-accelerated workloads. Experienced in building reliable background pipelines, multi-tenancy, observability, and production-grade APIs and systems.…

Available to hire

Backend engineer with 4+ years of production experience shipping scalable systems, real-time data pipelines, and SaaS platforms. Strong ownership mindset across design, deployment, and operations, with a track record of building and maintaining commercial products from day one.

Specialized in async FastAPI architecture, PostgreSQL optimization, event-driven systems, and GPU-accelerated workloads. Experienced in building reliable background pipelines, multi-tenancy, observability, and production-grade APIs and systems.

See more

Skills

Language

Work Experience

Senior Backend Engineer at B2B SaaS Platform (Churn Prediction & Renewal Analytics)
January 1, 2023 - December 31, 2024
Designed and shipped backend services for a customer renewal risk platform combining account data, usage signals, support metrics, and billing status into unified health scores. Implemented a multi-tenant architecture with Stripe billing integration and role-based access control (RBAC) plus API key management for enterprise customers. Built background job pipelines for data aggregation, batch email delivery, and scheduled renewal risk recalculation using async workers. Developed AI-assisted recommendations using OpenAI APIs and designed prompt engineering workflows with streaming responses for real-time decision support.
Founder & Lead Backend Engineer at Hutsix
January 1, 2023 - Present
Shipped and monetized a commercial desktop automation platform with 50+ active paying users. Built a stateful workflow engine with profile-based triggering, robust state machine transitions, and production diagnostics for real-world debugging. Engineered a GPU-accelerated computer vision pipeline (PyTorch + CUDA) to achieve sub-100ms latency for real-time visual automation. Designed an async event-driven architecture using a Redis-backed queue for reliable concurrent task execution and graceful degradation under load. Delivered a full-stack desktop application (Python + PySide6/Qt) with automated update distribution, plus custom crash reporting and telemetry for production observability. Owned feature roadmap, customer support, performance optimization, bug triage, and long-term maintenance with zero downtime.
Architect & Full-Stack Engineer at Real Estate SaaS Platform (AI Listing Generation & Lead Management)
January 1, 2022 - December 31, 2023
Designed an end-to-end AI listing generation system integrating OpenAI APIs with custom prompt engineering for real estate-specific property descriptions. Built lead management workflows including inbox organization, CRM integration, and agent analytics dashboards for deal pipeline visibility. Implemented subscription billing with Stripe, automated renewal reminders, and churn analytics while managing recurring revenue operations. Set up CI/CD pipelines with GitHub Actions, containerized services with Docker, and automated testing with Playwright to ensure reliability under production load.
Senior Distributed Systems Engineer at ML Training Platform
January 1, 2022 - December 31, 2023
Architected a distributed platform for dataset generation and model training with async worker pools, job scheduling, and horizontal scaling. Implemented API-key-based multi-tenancy with usage tracking, fair-share queuing, and rate limiting, using Redis-backed task distribution across worker nodes. Designed MinIO/S3 artifact storage with versioning, lineage tracking, and automated cleanup for training runs and model checkpoints. Built production observability with structured logging, Prometheus metrics, and alerting for troubleshooting and capacity planning.

Education

Master of Science — Computer Science at Hellenic Open University (EAP), Greece
January 11, 2030 - July 25, 2026
Diploma — Applied Electronics at Technological Educational Institute (TEI), Thessaloniki, Greece
January 11, 2030 - July 25, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Computers & Electronics, Media & Entertainment, Professional Services, Real Estate & Construction, Financial Services

Skills