Hi, I amMuhammed Semih Irmak

Frontend-Focused Software Engineer

I build accessible, real-time React, Next.js and TypeScript applications in FinTech/RegTech. My work connects frontend engineering with ASP.NET Core, automated testing and production delivery.

5+ CI/CD pipelines
15+ application deployments
Sakarya, Türkiye

View Projects Get in Touch View Resume (PDF · English)

Selected Projects

Professional platforms, reusable packages and full-stack applications.

Developer tooling

ReactTypeScriptASP.NET CorenpmNuGet

Report Issue Platform

Built reusable React and ASP.NET Core packages for issue reporting with privacy-aware screenshot annotation, browser-tab recording, console and network diagnostics, request correlation, and KVKK/GDPR-aware consent flows. Rolled out across 6+ projects, reducing issue triage and diagnosis time by approximately 70%.

npm Package NuGet Package

Frontend platform

ReactTypeScriptTailwind CSSComponent Library

TRA UI Kit

Developed a reusable React and TypeScript component library with 30+ components, adopted across 5+ applications. Part of a shared frontend platform with TRA UI Base to standardize application foundations.

View Code Live UI Kit

Frontend platform

ReactViteTypeScriptNode.jsCLI

TRA UI Base

Developed a Vite project template and Node.js/TypeScript CLI as part of the shared frontend platform. The foundation has been used to bootstrap 10+ internal projects.

View Code

Full-stack platform

Next.jsTypeScriptPostgreSQLDrizzle ORMSupabaseVitestPlaywright

Kairos Psychology & Child Development Platform

Built and launched a full-stack Next.js platform with dynamic specialist and service management, appointment scheduling, availability management, an admin CMS, RBAC/MFA, email workflows and SEO. Uses PostgreSQL, Drizzle ORM and Supabase, with Vitest and Playwright tests.

View Live App

FinTech / RegTech

ReactASP.NET CoreCRMPermission-Based UI

Tera Bank — Customer Onboarding & CRM

Owned the React UI end-to-end for customer onboarding and CRM, covering customer data, user management, permission-based workflows and real-time state. Also contributed to ASP.NET Core backend features and integrations.

FinTech / RegTech

React.NETSignalRTradingOnboarding

Tera Yatırım — Account Opening, CRM & Trading

Developed the React UI for online account opening and CRM, including multi-step onboarding, document workflows and customer operations, with contributions to the .NET backend. Built TeraRobot’s real-time trading and automation interfaces using SignalR-driven market and order updates.

Operations platform

ReactNode.jsNestJSMulti-Company Workflows

Tera Özel Güvenlik — Security Operations

Owned the complete React UI for a platform serving multiple companies, covering shifts, attendance, patrols, reports, documents and user administration. Implemented major parts of the Node.js/NestJS backend with separate users, documents and workflows for each company.

Experience

Software engineering in FinTech/RegTech, backed by an electronics engineering background.

Nov 2023 – Present

2 years 11 months

Nov 2023 – Present2 years 11 months

Frontend Developer

TRA Bilişim

Sakarya, Türkiye · FinTech / RegTech

Develop products for Tera Bank, Tera Yatırım, Tera Portföy, Tera Özel Güvenlik, Tera Finansal Yatırımlar Holding (TRHOL) and Tera Yatırım Teknoloji Holding (TEHOL).

Build accessible React and Next.js applications for trading, portfolio management, CRM and customer onboarding; collaborate with designers and backend engineers, and review junior developers’ code.
Build live order, order book and ticker interfaces with WebSocket/SignalR; keep large datasets responsive through virtualization, memoization and TanStack Query caching.
Modernize legacy React class-component and MVC frontends with function components, Vite, Next.js and the TanStack ecosystem.
Maintain 5+ GitLab CI/CD pipelines with Vitest/Playwright quality checks, SonarQube analysis and Sentry monitoring.
Manage production delivery for 15+ applications across container registries, Docker Compose, Linux and IIS; designed the company’s first automated IIS deployment pipeline.
Built an issue-reporting platform used across 6+ projects, reducing issue triage and diagnosis time by approximately 70%.

Jan 2022 – Jul 2023

1 year 6 months

Jan 2022 – Jul 20231 year 6 months

R&D / Hardware Design Engineer

Linatek Elektronik Raylı Sistemler

Malatya, Türkiye · Railway electronics

Designed, produced, tested and repaired electronic control boards and electrical control units used in railway locomotives. Contributed to hardware prototyping, troubleshooting and production support.