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I am a full stack senior software engineer with over 14 years of experience in back-end and frontend development, and I’m certified in Google and AWS. I have delivered large-scale solutions for both startups and major enterprises, including work for clients with multi-billion revenue streams. I enjoy building robust, scalable systems and mentoring others. I thrive on solving complex engineering challenges, exploring GenAI and cloud-native architectures, and collaborating with cross-functional teams to drive business impact.…I am a full stack senior software engineer with over 14 years of experience in back-end and frontend development, and I’m certified in Google and AWS. I have delivered large-scale solutions for both startups and major enterprises, including work for clients with multi-billion revenue streams. I enjoy building robust, scalable systems and mentoring others. I thrive on solving complex engineering challenges, exploring GenAI and cloud-native architectures, and collaborating with cross-functional teams to drive business impact.

Ergun Polat

AI Developer, Back-End Developer, Front-End Developer, +2

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I am a full stack senior software engineer with over 14 years of experience in back-end and frontend development, and I’m certified in Google and AWS. I have delivered large-scale solutions for both startups and major enterprises, including work for clients with multi-billion revenue streams. I enjoy building robust, scalable systems and mentoring others. I thrive on solving complex engineering challenges, exploring GenAI and cloud-native architectures, and collaborating with cross-functional teams to drive business impact.…I am a full stack senior software engineer with over 14 years of experience in back-end and frontend development, and I’m certified in Google and AWS. I have delivered large-scale solutions for both startups and major enterprises, including work for clients with multi-billion revenue streams. I enjoy building robust, scalable systems and mentoring others. I thrive on solving complex engineering challenges, exploring GenAI and cloud-native architectures, and collaborating with cross-functional teams to drive business impact.

Available to hire

I am a full stack senior software engineer with over 14 years of experience in back-end and frontend development, and I’m certified in Google and AWS. I have delivered large-scale solutions for both startups and major enterprises, including work for clients with multi-billion revenue streams. I enjoy building robust, scalable systems and mentoring others.

I thrive on solving complex engineering challenges, exploring GenAI and cloud-native architectures, and collaborating with cross-functional teams to drive business impact.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Kyndryl UK

April 1, 2025 - Present

Architected and led the development of a ground-up agentic GenAI framework for the UK’s biggest financial institutions, enabling autonomous tool usage, multi-step reasoning and complex data orchestration using LangGraph, ReAct with RAG, and Langfuse for AI observability, deployed on Azure Kubernetes Service. Provided technical leadership to a medium-sized team, shaping architecture, test strategies and threat models, conducted code reviews, and signed off on features and test plans. Built POCs comparing LangGraph, AutoGen and CrewAI; contributed to automating internal ServiceNow tickets and improving employee experience. Played a key role in retaining a £50M+ account through validated delivery, and led security incident resolution at Heathrow.

Senior Software Engineer at Very.co.uk

January 1, 2022 - April 1, 2025

Migrated a monolithic app serving 10M users/week to a microservices-based architecture using Node.js, TypeScript and React. Increased test coverage by 80% and reduced bugs by 50%. Cut AWS expenses by over 20%. Built scalable services on AWS (ECS, Lambda, Step Functions, DynamoDB), and used Azure OpenAI for training custom models. Modernized UI with accessibility improvements. Adopted TDD with Jest, Cypress and React Testing Library; built automated infrastructure with Terraform; maintained CI/CD pipelines with GitLab and Jenkins. Mentored juniors and collaborated with stakeholders and UI/UX teams; produced detailed service documentation.

Software Engineer at Sky

January 1, 2019 - December 1, 2022

Built internal tools using Node.js, TypeScript, React and Redux; developed a web app to send maintenance notifications via a third-party RESTful API (Mailjet); leveraged Sky’s component toolkit and testing frameworks; deployed backend services to Sky’s cloud with MongoDB and Nimbus Proxy; implemented Microsoft Active Directory login via a Spring Boot backend in Kotlin; contributed to an Android app for engineers; managed a small team and provided guidance on web projects; designed an internal network app for field engineers with orders, faults and user management; integrated Azure Active Directory for authentication; followed a test-driven approach.

Software Engineer at Avanti Communication PLC

November 1, 2017 - December 1, 2018

Contributed to government-based projects; Java 8, Spring Boot 2.0+, Docker; MySQL; MongoDB for reporting; Jenkins; Linux-based environments; developed an Android app to facilitate internet access via Avanti satellites; integrated online credit purchasing features; built a Kotlin Android app for truck management with GPS tracking.

Software Engineer at Brightbook Ltd UK

December 1, 2016 - October 1, 2017

Developed and maintained web applications, implemented new features and optimised backend services; collaborated with frontend teams to deliver enhanced user experiences and improved performance.

Software Engineer at Sky

December 1, 2013 - November 1, 2016

Built internal tools using Node.js, TypeScript, React and Redux; contributed to web and mobile solutions that supported field engineers and internal operations; implemented authentication and authorization flows; mentored junior developers and collaborated with cross-functional teams.

Junior Automated Tester at Amelco UK Ltd

July 1, 2012 - November 1, 2013

Contributed to automated test development and software quality assurance; collaborated with development teams to ensure robust release cycles and reliable builds.

Junior Software Tester and Programmer at Capscan Ltd (Placement year)

August 1, 2010 - September 1, 2011

Placement year focusing on QA automation and software development; supported testing efforts and contributed to coding tasks to improve product reliability.