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Tacettin Sertkaya

@tacettinsertkaya

Senior Frontend Developer at Balina, refactoring its Angular codebase and cutting page load times by ~50%.

At Balina, I own frontend development for the backoffice and CRM products, refactored 70–80% of the Angular codebase, and set code-review standards with the backend team. I cut page load times by ~50% and reduced the initial bundle size by ~60% through frontend performance work.

At Criccletech, I worked primarily as the team's frontend developer, building projects with Next.js, React, and Angular against NestJS and ASP.NET Core APIs. I delivered survey, suggestion, workshop, simulation, and education-management platforms for corporate clients.

I started my career in .NET development and have since worked across frontend and full-stack projects. My projects include Linkhiver, a link-in-bio product localized into 7 languages, and an AI code review and bug-fixing agent for Balina's development team.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Developer

Current

Balina

Dec 2023 - Present (2 years 10 months)

Owned frontend development of backoffice and CRM products end to end, refactored 70–80% of the Angular codebase, and set code-review standards. Cut page load times by ~50% and reduced initial bundle size by ~60% through lazy loading, standalone components, change-detection tuning, and RxJS optimization.

Angular RxJS React TypeScript Lazy Loading Standalone Components Change Detection Code Review Performance Optimization

Senior Frontend Developer

Criccletech

Aug 2020 - Dec 2023 (3 years 4 months)

Worked primarily as the team's frontend developer, building many projects with Next.js, React, and Angular against NestJS and ASP.NET Core APIs. Delivered survey, suggestion, workshop, simulation, and education-management platforms for corporate clients.

Next.js React Angular NestJS ASP.NET Core TypeScript REST APIs

Fullstack Developer (.NET & Vue.js)

Koç Digital (Bilge Adam)

Jan 2020 - Aug 2020 (7 months)

Developed Vue.js frontends on a .NET backend for production-line management applications used in Arçelik and Ford factories. Process-tracking screens contributed to a ~30% efficiency gain in production process monitoring.

Vue.Js .NET Production line management Process Tracking

Fullstack Developer (.NET & Angular)

Kosifler Group

Apr 2018 - Jan 2020 (1 year 9 months)

Built management and reporting screens for sales, accounting, and HR modules of a group-wide ERP system (.NET Core + Angular) serving subsidiaries in automotive, construction, and hotel sectors. Owned assigned modules end to end, from database design to UI.

.NET Core Angular ERP Database Design SQL Reporting

Fullstack Developer

Freelance

Aug 2015 - Mar 2018 (2 years 7 months)

Delivered ERP and web-based restaurant-automation projects end to end, including database design, .NET backend, and frontend, for 12 different businesses.

.NET ERP Food Service Automation Database Design Web Development