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Senior Full Stack Engineer with 13+ years building and modernising enterprise platforms across construction, fintech, payments, retail, and investment management. Strong expertise in C#/.NET, ASP.NET Core, React, TypeScript, SQL Server, Azure, and AWS, delivering complex end-to-end features from database and service layers through modern front-end applications. Recently led development on a greenfield .NET 9/React 19 B2B SaaS platform for the Considerate Constructors Scheme, modernising a large legacy ASP.NET MVC 5 system using a strangler-fig approach. Proven ownership of architecture, feature delivery, and DevOps including Azure DevOps CI/CD, integration testing, private NuGet packages, Azure App Service deployments, and reusable platform libraries.…Senior Full Stack Engineer with 13+ years building and modernising enterprise platforms across construction, fintech, payments, retail, and investment management. Strong expertise in C#/.NET, ASP.NET Core, React, TypeScript, SQL Server, Azure, and AWS, delivering complex end-to-end features from database and service layers through modern front-end applications. Recently led development on a greenfield .NET 9/React 19 B2B SaaS platform for the Considerate Constructors Scheme, modernising a large legacy ASP.NET MVC 5 system using a strangler-fig approach. Proven ownership of architecture, feature delivery, and DevOps including Azure DevOps CI/CD, integration testing, private NuGet packages, Azure App Service deployments, and reusable platform libraries.

Ahmet Zurnaci

Developer, Web Developer, Back-End Developer, +5

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Senior Full Stack Engineer with 13+ years building and modernising enterprise platforms across construction, fintech, payments, retail, and investment management. Strong expertise in C#/.NET, ASP.NET Core, React, TypeScript, SQL Server, Azure, and AWS, delivering complex end-to-end features from database and service layers through modern front-end applications. Recently led development on a greenfield .NET 9/React 19 B2B SaaS platform for the Considerate Constructors Scheme, modernising a large legacy ASP.NET MVC 5 system using a strangler-fig approach. Proven ownership of architecture, feature delivery, and DevOps including Azure DevOps CI/CD, integration testing, private NuGet packages, Azure App Service deployments, and reusable platform libraries.…Senior Full Stack Engineer with 13+ years building and modernising enterprise platforms across construction, fintech, payments, retail, and investment management. Strong expertise in C#/.NET, ASP.NET Core, React, TypeScript, SQL Server, Azure, and AWS, delivering complex end-to-end features from database and service layers through modern front-end applications. Recently led development on a greenfield .NET 9/React 19 B2B SaaS platform for the Considerate Constructors Scheme, modernising a large legacy ASP.NET MVC 5 system using a strangler-fig approach. Proven ownership of architecture, feature delivery, and DevOps including Azure DevOps CI/CD, integration testing, private NuGet packages, Azure App Service deployments, and reusable platform libraries.

Available to hire

Senior Full Stack Engineer with 13+ years building and modernising enterprise platforms across construction, fintech, payments, retail, and investment management. Strong expertise in C#/.NET, ASP.NET Core, React, TypeScript, SQL Server, Azure, and AWS, delivering complex end-to-end features from database and service layers through modern front-end applications.

Recently led development on a greenfield .NET 9/React 19 B2B SaaS platform for the Considerate Constructors Scheme, modernising a large legacy ASP.NET MVC 5 system using a strangler-fig approach. Proven ownership of architecture, feature delivery, and DevOps including Azure DevOps CI/CD, integration testing, private NuGet packages, Azure App Service deployments, and reusable platform libraries.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Turkish

Fluent

Work Experience

Senior Full Stack Engineer (Contract) at Considerate Constructors Scheme

March 1, 2025 - June 1, 2026

Led contributions to a multi-repository enterprise platform serving the UK & Ireland construction industry, owning architecture, feature delivery, CI/CD, and legacy modernisation across C#/.NET, React, TypeScript, Node.js, and Python-based tooling. Architected and built Insights Dashboard 2.0 as a greenfield .NET 9/ASP.NET Core MVC + React B2B portal to replace a legacy ASP.NET MVC 5 member platform. Designed layered architecture using C#, EF Core, SQL Server, repository pattern, dependency injection, and React/TypeScript micro-frontends covering registration, analytics, e-commerce, partner rewards, innovation, and admin domains. Delivered complex multi-step Site & Organisation registration workflow including drafts save/resume, Companies House lookup, Google Places address search, dynamic fee calculation, VAT validation, and concurrency protection. Built e-commerce and checkout functionality including basket management, product variants, VAT/carriage/shipping logic, billing and deliv

Senior Full Stack / DevOps Engineer at PLANET, Payment and Technology Solutions

June 1, 2023 - January 1, 2025

Enhanced payment switch services by designing and implementing performance optimisations including efficient database paging structures and Node.js-based APIs, reducing system load and improving performance for real-time transaction processing. Conducted performance analysis to advise on solutions for data migration to a region-agnostic database, ensuring global configuration consistency, and developed TypeScript-based tooling for seamless integration. Refactored legacy payment services by modularising components and extracting them from a monolithic architecture; upgraded backend from .NET Framework 4.6.2 to .NET 8 improving scalability, performance, and maintainability. Designed and developed React-based front-end applications including a real-time admin dashboard and a customer-facing portal, integrating TypeScript APIs for monitoring, configuration, and user management. Developed proofs of concept for migrating messaging systems from MSMQ to Kafka and redesigning a complex 300-co

Senior Full Stack Engineer at Cult Wines, Investment Management & Financial Services

October 1, 2021 - April 1, 2023

Implemented Azure Web Apps and Azure Functions with Service Bus integration to support the Cult X platform using C#, .NET Core, Node.js, TypeScript, GraphQL, and React UI components. Constructed a faceted search feature via Elasticsearch integration. Built daily data update processes triggered by a TimerTrigger that fetched data from Azure Blob Storage and indexed it into Elasticsearch automatically. Created Azure Durable Functions triggered by Azure Service Bus to incrementally update Elasticsearch from SQL Server database tables. Developed serverless microservices in an Azure environment.

Senior Full Stack Engineer at Costa Coffee

February 1, 2021 - October 1, 2021

Designed and constructed a Nutrition Project for Costa Coffee web portal microservices to facilitate product tracking. Developed a React-based QR code generator for user portal using AWS Amplify, AWS Cognito, and TypeScript for retail events; incorporated Node.js, GraphQL with additional AWS services such as Lambda functions, S3, SES, DynamoDB, and AWS ECS. Set up continuous integration/delivery through GitHub Actions & AWS CodePipeline.

Senior Full Stack Engineer at Lanistar (Banking)

September 1, 2020 - February 1, 2021

Implemented microservices for the Lanistar App/Lanistar Card projects leveraging React, TypeScript, Node.js, C#, .NET Core and MSSQL on a secure AWS cloud architecture. Developed, maintained, and optimised banking/payment system microservices. Integrated ModuleRand and GPS (Global Processing Services) to improve performance.

Senior Full Stack Engineer at Karshare (Digital Transportation Services)

November 1, 2019 - August 1, 2020

Engineered microservices for the Karshare app, a car sharing system built with React, GraphQL, TypeScript and Node.js on AWS. Leveraged Elasticsearch to drive the search module in vehicle microservices. Implemented Stripe to power the payment/wallet system.

Senior Full Stack Engineer at INTERTECH (Payment and Technology Solutions)

December 1, 2017 - November 1, 2019

Built front-end and back-end services for payment systems using React, JavaScript, .NET, C#, C++ and MSSQL. Developed and maintained card payment solutions for Deniz Bank, Paycell/Turkcell, PTT Bank, İninal and Palladium. Worked on secure code projects including MasterCard Masterpass Digital Wallet, 3D Secure, BKM Express, and TROY GO. Crafted integration services for UnionPay/ChinaPay (UPI) platforms.

Software Engineer at INTERTECH (Payment and Technology Solutions)

April 1, 2013 - December 1, 2017

Developed payment authorisation and batch processing applications for card payment solutions. Built C++ OLTP services and ISO 8583-based online/offline authorisation flows. Worked on EMV, HSM, remote key loading, fraud prevention and scheme certification requirements for Visa, MasterCard and BKM. Prepared technical documentation, integration flows, and database specifications for client implementations.