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I'm a Full Stack Engineer with 8 years of experience building scalable web platforms across FinTech, iGaming, GreenTech, and enterprise software environments. I have a strong background in front-end development with React, JavaScript, HTML, and CSS, complemented by back-end expertise in Python, cloud-native architectures, and API development. I thrive in remote agile teams, Kanban delivery, AWS infrastructure, testing, and cross-functional collaboration to deliver high-quality digital products.…I'm a Full Stack Engineer with 8 years of experience building scalable web platforms across FinTech, iGaming, GreenTech, and enterprise software environments. I have a strong background in front-end development with React, JavaScript, HTML, and CSS, complemented by back-end expertise in Python, cloud-native architectures, and API development. I thrive in remote agile teams, Kanban delivery, AWS infrastructure, testing, and cross-functional collaboration to deliver high-quality digital products.

Krystian Duc

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

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I'm a Full Stack Engineer with 8 years of experience building scalable web platforms across FinTech, iGaming, GreenTech, and enterprise software environments. I have a strong background in front-end development with React, JavaScript, HTML, and CSS, complemented by back-end expertise in Python, cloud-native architectures, and API development. I thrive in remote agile teams, Kanban delivery, AWS infrastructure, testing, and cross-functional collaboration to deliver high-quality digital products.…I'm a Full Stack Engineer with 8 years of experience building scalable web platforms across FinTech, iGaming, GreenTech, and enterprise software environments. I have a strong background in front-end development with React, JavaScript, HTML, and CSS, complemented by back-end expertise in Python, cloud-native architectures, and API development. I thrive in remote agile teams, Kanban delivery, AWS infrastructure, testing, and cross-functional collaboration to deliver high-quality digital products.

Available to hire

I’m a Full Stack Engineer with 8 years of experience building scalable web platforms across FinTech, iGaming, GreenTech, and enterprise software environments.

I have a strong background in front-end development with React, JavaScript, HTML, and CSS, complemented by back-end expertise in Python, cloud-native architectures, and API development. I thrive in remote agile teams, Kanban delivery, AWS infrastructure, testing, and cross-functional collaboration to deliver high-quality digital products.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Full Stack Engineer at itCraft

February 1, 2025 - April 1, 2026

Delivered scalable digital products for AdTech, eCommerce, and customer engagement platforms. Designed responsive campaign management dashboards using React, JavaScript, HTML, and CSS; improved advertiser workflow efficiency by 32% across multi-brand AdTech operations. Built and maintained Python/FastAPI microservices enabling analytics, segmentation, and campaign automation. Led architecture discussions on reusable component libraries and modular front-end design. Implemented AWS-based infrastructure (Lambda, ECS, CloudWatch, S3) improving deployment consistency and reducing downtime. Enhanced quality with automated unit, integration, and UI tests (Pytest, Jest, Cypress) and integrated REST APIs and third-party analytics. Mentored juniors on clean code, performance, and remote collaboration.

Software Engineer at Genpact

August 1, 2022 - January 1, 2025

Contributed to enterprise-grade financial and analytics platforms; built customer-facing web portals with React, TypeScript, and reusable UI components, increasing user adoption. Implemented secure back-end services with Python, Flask, and RESTful APIs to support transaction processing, reporting, and internal workflow automation. Collaborated with architects and DevOps to design scalable systems on AWS with Docker and CI/CD pipelines. Expanded automated testing (Selenium, Pytest, Postman), reducing production defects. Worked with remote teams in Kanban/Jira; optimized SQL queries for high-volume reporting and dashboard responsiveness.

Full Stack Developer at Namics

May 1, 2020 - July 1, 2022

Built digital commerce and customer experience solutions; created responsive UIs with React, JavaScript, HTML, CSS. Developed reusable API services with Python and Node.js; integrated payments, analytics, and CRM platforms for unified customer journeys. Collaborated with designers, QA, and product owners in agile teams; supported cloud deployments with AWS, Docker, and GitHub Actions. Improved front-end performance with code splitting and caching, increasing page speed scores.

Junior Software Engineer at TMA Solutions

January 1, 2018 - April 1, 2020

Supported enterprise software projects by building front-end features, back-end services, and internal business applications. Built interactive web pages with JavaScript, HTML, CSS, and React; assisted seniors with components and bug fixes. Developed simple back-end modules using Python and SQL for data processing and reporting. Participated in code reviews, QA validation, and defect resolution to improve release quality. Worked in agile teams using Jira, Git, and Slack to strengthen communication and problem-solving.