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Maksymilian KarperskiMK
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Maksymilian Karperski

@maksymiliankarperski

I build fintech, ERP, and AI web applications with React, Next.js, Python, and AWS.

Poland
Message

I've built fintech, ERP, and AI-driven web applications for Fieldpoint ServiceApplications, Advocu, Accesto, and Open-E Data Storage Software. At Fieldpoint, I created enterprise AI assistants using Python, FastAPI, LangChain, Claude Opus, Gemini, and OpenAI APIs.

At Advocu, I developed a fintech web app with Vue 3, Tailwind CSS, Stripe, and Keycloak, while architecting a serverless AWS backend with Lambda, API Gateway, S3, DynamoDB, EC2, and Cognito. I also built an ERP system with Next.js and improved SEO through lazy loading and CDN fonts.

I've worked across React, Vue, Next.js, Django, PostgreSQL, Docker, GitHub Actions, and AWS to deliver responsive, secure products for distributed teams.

Experience

Work history, roles, and key accomplishments

FI

Sr. Full Stack Developer

Fieldpoint ServiceApplications, Inc

Oct 2023 - Aug 2026 (2 years 10 months)

Established automated and event-triggered cloud security measures within AWS using CloudTrail, CloudWatch, SNS, and Lambda. Implemented prompt versioning, A/B testing, and prompt evaluation across Claude Opus, Gemini, and OpenAI, and built enterprise AI assistants using Python (FastAPI), LangChain, and these APIs.

AD

Sr. Full Stack Developer

Advocu

Sep 2020 - Aug 2023 (2 years 11 months)

Developed a Fintech web app using Vue 3, Composition API, Tailwind CSS, Stripe, Keycloak, Vuex, and Vue Router. Architected a serverless backend in AWS with Lambda, API Gateway, S3, DynamoDB, EC2, and Cognito, and integrated Stripe API for payment processing. Also developed an ERP system using Next.js, Redux, Redux Toolkit, Ant Design, Formik, and AWS Cognito, and improved SEO scores by implementi

AC

Full Stack Developer

Accesto

Jun 2016 - Aug 2020 (4 years 2 months)

Developed Fintech and CRM platforms with React, Next.js, Gatsby, Redux, Styled Components, and Ant Design. Worked with React.js and Vue.js to change the stack from regular JavaScript to Flux and Vuetify framework using Semantic UI, and collaborated with distributed remote team members using Jira and Slack. Implemented CI/CD with GitHub Actions and managed AWS servers and deployed products using Do

OS

Full Stack Developer

Open-E Data Storage Software

Dec 2013 - May 2016 (2 years 5 months)

Managed application state using server and client-based state management options. Coded JavaScript for page functionality and Lightbox plug-in using jQuery, and developed Ant Design Form, Table, Avatar, Button, Modal, etc., widgets to redesign the previous contact page into React.js. Utilized Agile methodology SDLC to manage projects.

Education

Degrees, certifications, and relevant coursework

Warsaw University of Technology logoWT

Warsaw University of Technology

Bachelor's degree, Computer Science

2006 - 2012

Bachelor's degree in Computer Science from Warsaw University of Technology.

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