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I'm Halil Teyfik Dolmaci, a Senior Full-Stack Engineer with 10+ years of experience architecting scalable cloud applications for 250K+ users across 15+ countries. I'm proficient in React, Node.js, TypeScript, and AWS, delivering high Lighthouse scores, dramatic performance gains, meaningful cost reductions, and 99.9% uptime. I have led cross-functional teams, mentored 10+ developers, and delivered AI-powered platforms across e-commerce, fintech, and real-time communications. I enjoy shaping system design, microservices, and DevOps practices, and I take pride in building robust, scalable software with clean architecture. I regularly collaborate with product and infra teams to improve performance, reliability, and developer velocity.…I'm Halil Teyfik Dolmaci, a Senior Full-Stack Engineer with 10+ years of experience architecting scalable cloud applications for 250K+ users across 15+ countries. I'm proficient in React, Node.js, TypeScript, and AWS, delivering high Lighthouse scores, dramatic performance gains, meaningful cost reductions, and 99.9% uptime. I have led cross-functional teams, mentored 10+ developers, and delivered AI-powered platforms across e-commerce, fintech, and real-time communications. I enjoy shaping system design, microservices, and DevOps practices, and I take pride in building robust, scalable software with clean architecture. I regularly collaborate with product and infra teams to improve performance, reliability, and developer velocity.

Halil Teyfik Dolmaci

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

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I'm Halil Teyfik Dolmaci, a Senior Full-Stack Engineer with 10+ years of experience architecting scalable cloud applications for 250K+ users across 15+ countries. I'm proficient in React, Node.js, TypeScript, and AWS, delivering high Lighthouse scores, dramatic performance gains, meaningful cost reductions, and 99.9% uptime. I have led cross-functional teams, mentored 10+ developers, and delivered AI-powered platforms across e-commerce, fintech, and real-time communications. I enjoy shaping system design, microservices, and DevOps practices, and I take pride in building robust, scalable software with clean architecture. I regularly collaborate with product and infra teams to improve performance, reliability, and developer velocity.…I'm Halil Teyfik Dolmaci, a Senior Full-Stack Engineer with 10+ years of experience architecting scalable cloud applications for 250K+ users across 15+ countries. I'm proficient in React, Node.js, TypeScript, and AWS, delivering high Lighthouse scores, dramatic performance gains, meaningful cost reductions, and 99.9% uptime. I have led cross-functional teams, mentored 10+ developers, and delivered AI-powered platforms across e-commerce, fintech, and real-time communications. I enjoy shaping system design, microservices, and DevOps practices, and I take pride in building robust, scalable software with clean architecture. I regularly collaborate with product and infra teams to improve performance, reliability, and developer velocity.

Available to hire

I’m Halil Teyfik Dolmaci, a Senior Full-Stack Engineer with 10+ years of experience architecting scalable cloud applications for 250K+ users across 15+ countries. I’m proficient in React, Node.js, TypeScript, and AWS, delivering high Lighthouse scores, dramatic performance gains, meaningful cost reductions, and 99.9% uptime. I have led cross-functional teams, mentored 10+ developers, and delivered AI-powered platforms across e-commerce, fintech, and real-time communications.

I enjoy shaping system design, microservices, and DevOps practices, and I take pride in building robust, scalable software with clean architecture. I regularly collaborate with product and infra teams to improve performance, reliability, and developer velocity.

Skills

Experience Level

Expert

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Intermediate

Language

Turkish

Fluent

English

Advanced

Work Experience

Senior Software Engineer at User Experience Center

September 1, 2024 - Present

Developed full-stack applications for e-commerce (pazmanya.com) and rewards platforms (cashygo.com) using Next.js, shadcn/ui, and OpenAPI code generation with React Query. Optimized performance to 90+ Lighthouse scores via API layer improvements, S3/MinIO asset migration, and image processing acceleration. Architected event-driven backend for pair.center dating app processing Discord presence data through Kafka; built high-performance data ingestion pipelines in Node.js (Bun) with CSV serialization and 50K+ PostgreSQL batch inserts. Designed a logarithmic scoring algorithm in ClickHouse connected to PostgreSQL via FDW. Implemented Redis-based deduplication and advanced PostgreSQL indexing. Created isolated Docker Compose development environments with Traefik reverse proxy and TLS. Built CI/CD pipelines with GitHub Actions for containerized builds and Rancher deployments. Mentored backend teams on performance optimization and developer workflow.

Senior Software Engineer at Osoci

August 1, 2023 - September 1, 2024

Maintained and enhanced Alve real-time video chat platform; migrated from Janus Gateway to Jitsi on Kubernetes, enabling auto-scaling and multi-cloud availability (AWS, GCP, Hetzner). Refactored MongoDB aggregations with custom type-safe lookup builders, achieving 10–20x query performance improvements on 500K user collections. Replaced regex-based username search with indexed n-grams. Built custom Prosody plugins for enhanced stream monitoring and observability. Developed Angular admin panel with a micro-frontend architecture and Jitsi Meet SDK integration.

Senior Software Engineer at Proxify

January 1, 2023 - Present

Qualified for Proxify senior engineer talent network; contributed as a senior full-stack developer and architecture consultant across client engagements.

Senior Full-stack Developer at Creatopy

March 1, 2022 - August 1, 2023

Developed features for a digital advertising platform generating multi-platform campaign outputs; implemented template list view with pixel-perfect Figma-driven UI; optimized Windows development environment with WSL2 and improved developer onboarding. Identified and resolved performance bottlenecks during platform optimization.

Senior Frontend Developer at La3eb

November 1, 2021 - March 1, 2022

Refactored checkout, delivery, and authentication modules for an international e-commerce platform. Implemented in-memory caching for React hooks and components, reducing CPU usage by 10% and improving load times by 5–10%. Modernized React components using ResizeObserver and efficient hooks; built a reusable component library with JSDoc documentation.

Lead Full-stack Developer at KAÇPARA Inc

December 1, 2020 - November 1, 2021

Led a 5-person development team as technical mentor, coordinating cross-department collaboration. Designed and built a renovation cost calculation platform from scratch using Next.js with a wizard-based UI. Implemented a configurable inflation-rate factor system requiring 10% price adjustments. Built backend infrastructure with NestJS and TypeORM, including authentication and subscription management. Deployed on DigitalOcean Apps with established CI/CD pipelines.

Senior Full-stack Developer at Orenda Software

December 1, 2018 - December 1, 2020

Architected frontend for a cryptocurrency exchange platform serving 1,000+ daily active users. Built a custom WebSocket gateway with REST API for real-time data publishing and subscription management. Mentored backend team on migrating critical real-time features from PHP to Node.js and guided architectural decisions for high-frequency trading requirements.

Senior Full-stack Developer at Talha IT

July 1, 2017 - December 1, 2018

Built a real-time auction platform with pay-per-bid model; optimized transaction processing using MySQL stored procedures; developed real-time chat with AngularJS, Node.js, MongoDB, and WebSockets. Implemented a hybrid backend architecture combining Node.js and PHP with MySQL for performance across components.

Medior Full-stack Developer at GD Holding Inc

June 1, 2016 - May 1, 2017

Integrated Parasut billing API into Symfony-based CRM for voice management; built a drag-and-drop in-voice templating system enabling accurate digital mapping of invoice templates with proper printing alignment.

Junior Full-stack Developer at GD Holding Inc

June 1, 2015 - June 1, 2016

Developed feature modules for a CRM application using JavaScript technologies including AngularJS and Node.js.

Senior Software Engineer at User Experience Center (Osoci team)

September 1, 2024 - Present

Current role focusing on high-traffic applications (pazmanya.com e-commerce, cashygo.com rewards) using Next.js, shadcn/ui, TypeScript, and OpenAPI code generation. Architected an AI-powered dating platform (pair.center) processing 1M+ daily events via event-driven microservices and Kafka with ClickHouse/PostgreSQL analytics. Delivered 95+ Lighthouse scores through API redesign, CDN migrations, image optimization (imgproxy), and caching; built scalable data ingestion pipelines and mentored a 5+ person team.