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Kriss – AWS, React, Typescript, experts in Lemon.io

Kriss

From Romania (GMT+3)

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Full-stack Web DeveloperSenior
Hire developer
4 years of commercial experience
AI
Animation
Asset management
Banking
Beauty
Data analytics
Edtech
Fintech
Govtech
Healthcare
Management
Photography
Project management
Subscription
Trade
SaaS
Lemon.io stats
1
projects done
1300
hours worked
3
offers now 🔥

Kriss – AWS, React, Typescript

With 4+ years of experience as a Full-stack Software Developer, Kriss is a tech-savvy professional who brings a unique blend of expertise and creativity to every project. Having solid command of Python, JS/TS, Django, React, CI/CD configuration, git, and databases like PostgreSQL and MongoDB, Kriss knows how to navigate complex code with ease. In addition, his positive attitude and solution-oriented mindset make him an ideal candidate for senior/lead full-stack developer positions.

Main technologies
AWS
3 years
React
4 years
Typescript
4 years
Django
4 years
Python
4 years
Next.js
2.5 years
Additional skills
Node.js
PostgreSQL
MongoDB
JavaScript
Express.js
React Native
Docker
AWS Lambda
Terraform
GraphQL
GCP
Cypress
CI/CD
Heroku
OpenAI
Vercel
OpenAI API
Tailwind CSS
Web scraping
Chrome extensions
Puppeteer.js
BeautifulSoup
Arduino
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Founder / Full-stack Developer
Mar 2024 - Ongoing2 months
Project Overview

This company develops web services and Chrome extensions for its Community Owners to increase their conversion rates and simplify workflows.

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Responsibilities:
  • Worked closely with clients to develop key features and create a tailored experience.
  • Developed an account management system and ensured the account information's safely.
  • Integrated Llama 3 for Chat Flows (chat funnel automation service) & content moderation.
  • Created extensions for the injection of important information and features.
Project Tech stack:
Chrome extensions
React
Prisma
PostgreSQL
Node.js
Next.js
Auth0
Tech Lead
Apr 2024 - May 20241 month
Project Overview

This company has created the world’s most secure, intelligent, and competent AI speech-to-text assistant for Therapists and Psychologists. It can take your notes for you, make adjustments as you see fit, and even update them in your EHR of choice, ultimately saving you thousands of hours per year. Let the assistant handle all your time-consuming tasks so you can focus on what matters most.

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Responsibilities:

HIPAA compliant AI assistant for Therapists, Psychologists, and Psychiatrists.

  • Developed a realtime transcription application with built in sentence analysis.
  • Integrated AI for smart suggestions and transcription summarisation.
  • Ensured data protection by implementing critical security features.
Project Tech stack:
Next.js
AWS
AI
Node.js
Express.js
Socket.io
Amazon EC2
Nginx
Technical lead / Senior Full-stack Developer
Jun 2023 - Mar 20249 months
Project Overview

Leading university admissions consultancy. The product provides unparalleled perspectives on what constitutes a successful college application, from academics and test scores to essays and scholarships. The product provides industry-lead recommendations using special AI-powered methodology.

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Responsibilities:
  • Increased traffic by 175%, owning the merger of the two platforms.
  • Improved security by implementing cross-platform authentication and API keys.
  • Developed data collection and reporting systems for platform usage, spending, and trends.
  • Increased revenue by X2 developing a platform currency and integrating it across all services provided.
  • Developed industry-leading technology by implementing OpenAI’s API for the solutions.
Project Tech stack:
React
Next.js
Prisma
tRPC
Typescript
Firebase
Google API and Services
Stripe API
ChakraUI
Material UI
OpenAI
OpenAI API
PostgreSQL
Python
Docker
GCP
JavaScript
Vercel
Algolia
Senior Full-stack Developer
May 2023 - Sep 20233 months
Project Overview

An AI-powered professional headshot generator.

This innovative app allows you to reimagine yourself in various professional aesthetics. Utilizing advanced AI technology, simply upload a few of your photos and let the AI get acquainted with your features.

Record your voice, and our AI model will convert your photos into a video. It also offers the convenience of collecting, downloading, and sharing your favorite images with ease. You can save all your pictures and share them across all popular social media platforms.

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Responsibilities:
  • Improved output quality by 10% by developing AI picture filtering & detection before upload.
  • Reduced client tickets by over 60% by creating feedback, rewards systems and elevating data collection.
  • Developed time sensitive features for Web, iOS and Android devices.
Project Tech stack:
React Native
Styled-components
Python
Node.js
React Query
Figma
tRPC
FastAPI
AWS
AWS SageMaker
Typescript
AI
Prisma
PostgreSQL
Docker
Docker Compose
Tech Lead / Senior Full-stack Developer
Dec 2020 - May 20232 years 4 months
Project Overview

It allows users to manage real-time & historical portfolios. The application provides real-time services (1-12 months) and historical services (2 years in 1 hour). It tracks smart metrics and insights that allow the trainee and trainer to outline a Portfolio Management Profile, generate reports, and many more.

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Responsibilities:
  • Developed reporting and other time-sensitive features with positive feedback from the clients. As a result, the tool has grown in popularity and in 2022, fir the first time, the tool was booked for the entire year by a growing customer base.
  • Reduced client tickets by 70% by resolving critical issues using more scalable approaches and troubleshooting. Having the product in mind and its fast growth, I had to find a way to make the application as efficient as possible, implement scalable infrastructure having costs in mind and reduce development issues to a minimum.
  • Designed and implemented Terraform infrastructure for CI & CD for both the backend and frontend using AWS features. Created more reliable staging and local environments for faster development and higher quality testing.
  • Increased development efficiency by mentoring junior developers and holding internship training lessons.
Project Tech stack:
Typescript
Socket.io
Django
Python
PostgreSQL
Docker
Docker Swarm
Nginx
JavaScript
Redux
Redux Saga
Webpack
CSS
SASS
AWS
CI
CD
Terraform
Full-stack Developer
Feb 2021 - Apr 20232 years 2 months
Project Overview

Fast pace day trading simulator, which allows traders to experience real-time trading. The application brings together all necessary tools for a trader like Electronic Brokers, Clients calls, Broker Dealer markets, Live News and many more. Enforces decision making for the user which eventually leads to a Trading Profile, leader boards and various metrics which are included in a report.

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Responsibilities:
  • Reduced load time by upgrading the Webpack configuration from version 3 to 5 and decreased file sizes.
  • Refactored project framework architecture by upgrading React 12 (Class Based) to React 16 (Hook Based).
  • Designed a responsive user interface using the Adobe XD toolkit, which lessened the development time of the service.
  • Implemented mentioned design.
  • Developed AWS lambdas for developer-friendly service update.
Project Tech stack:
React
Webpack
JavaScript
Typescript
CSS
SCSS
Adobe XD
AWS
Redux
Redux Saga
Django
Python
PostgreSQL
Full-stack Developer
Oct 2021 - Mar 20231 year 4 months
Project Overview

The Options Simulator contains various complex features that allow itself to stand out (will enable users to modify large amounts of parameters that impact the market and, therefore, gameplay). Allows trainers to build Trading Profile Reports.

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Responsibilities:
  • Developed a successful front-end application MVP in a single month using the latest technologies. Later in 2023, after the product reached maturity and all the client requested features were implemented, he refactored the entire design and user interface in order to create a more premium user experience.
  • Implemented better event management using Redux Saga due to requests being handled mostly through WebSockets. Due to the nature of this particularly fast paced trading application, rest requests which are blocking would have not provided performance. Implementing Redux Saga allowed for complex event handling which generic state management tools are simply not capable of.
  • Decreased user latency by 40% by improving loading time and optimising client side operations. Implemented cache busting, chunk splitting and image/file size reductions in order to decrease load time.
  • Implemented CI & CD using AWS features.
  • Worked closely with the backend developer in order to structure and ensure a reliable and fast communication between the client side and the server. Message payloads have to be consistent, as light as possible and error handling must be twice as strict in this case.
Project Tech stack:
Typescript
JavaScript
Django
Python
PostgreSQL
Redux
Nginx
React
Redux Saga
Webpack
CSS
SASS
AWS
Terraform
CI
CD
Tech Lead / Contractor
Sep 2022 - Feb 20234 months
Project Overview

Personalised mentoring for acceptance into elite universities. The product's aim is to smooth the application process for ambitious students who walk in our shoes.

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Responsibilities:
  • Reduced internal tickets by over 60% refactoring APIs and Databases for more consistent data tracking.
  • Streamlined task management and ensured code quality through consistent reviews.
  • Influenced feature development through technical assessments, contributing to the product’s overall shape up. Worked closely with the Product Team in order to estimate technical resources required.
  • Provided pull request reviews and code quality assurance. Held meetings every two weeks to recap good and bad practices to ensure the team is on the same page.
  • Took on troubleshooting and bug fixes whenever needed. He acted as a problem solver and aided my team when a problem was blocking the development process. Communication and transparency are the two key factors that helped the team overcome all technical issues.
Project Tech stack:
Typescript
React
React Query
CSS
SASS
Node.js
Express.js
Socket.io
MongoDB
DigitalOcean
Docker
Cypress
GitHub Actions
Full-stack Developer
Feb 2022 - Dec 202210 months
Project Overview

Documents validator and collaboration software. It's a web application for the US Government for contract bidding & selection that enabled better collaboration in larger teams and making better assessments.

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Responsibilities:
  • Developed a NextJS application MVP in less than 4 months.
  • Maximised security and data protection by implementing AWS GovCloud infrastructure and private networks. Due to the nature of the project, security was a must. All services and data had to be strictly managed and all credentials well protected.
  • Contributed to the product vision with features backed by cost, time, and user experience analysis.
  • Provided realtime statistics and filters by efficiently parsing large amounts of data.
Project Tech stack:
React
Next.js
Node.js
GraphQL
CircleCI
Express.js
Socket.io
Docker
Nginx
AWS
Typescript
React Query
SASS
CSS
MongoDB
tRPC
Lead Full-stack Developer
May 2021 - Jul 20221 year 2 months
Project Overview

A simulator specially designed with market experts that guide trainees through the process of mergers and acquisitions. It provides complex tools that guide the user through company documents, statistics, and other metrics.

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Responsibilities:
  • Built a successful SaaS Full Stack MVP in less than 6 months by efficiently translating the client’s requests into system requirements and code architecture. The process was lengthy and many iterations were made, in the end resulting in a successful demo and happy clients.
  • Created and designed a complex database architecture that enabled us to update the project quickly.
  • Designed and implemented infrastructure for CI & CD for both the backend and frontend using AWS features.
  • Developed PDF document creation and revision system using Django and AWS. A large part of the user experience is negotiations with actual documents. We were able to design document generation and integrate viewers to provide the full experience.
  • Developed formula-capable (Excel-like) tables for specific metrics and statistics. Why open Excel? Use our app, it will be faster.
Project Tech stack:
Typescript
JavaScript
React
React Query
CSS
SASS
Django
Python
PostgreSQL
AWS
Socket.io
Nginx

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