
Kriss
From Romania (UTC+3)
5 years of commercial experience
Lemon.io stats
3
projects done1368
hours worked1
offers now 🔥Kriss – React, Django, Node.js
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. Kriss has worked on AI-driven solutions, developing AI pipelines for data collection, contextual mapping, and automated document generation. In addition, his positive attitude and solution-oriented mindset make him an ideal candidate for senior/lead full-stack developer positions, especially in AI-driven applications.
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1st April 2025 but can start soonerDirect hire
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Let’s get started today!Experience Highlights
Freelance Software Developer
This is your grant-writer in a box! It's a platform designed to assist individuals or organizations in securing grants. They identify, apply for, and manage grant opportunities on your behalf.
- Developed AI pipelines for collecting data, creating mapping and context and generating documents.
- Designed and integrated AWS production infrastructure.
- Improved stability with prompt engineering and comprehensive error handling.
- Created an asynchronous screenshot taker.
Senior Front-end Developer
A true client-facing Live Casino provider. They always go the extra mile to help their partners succeed. At this company, they offer over 20 years of experience in the iGaming industry. They've consistently led the global iGaming market with their innovative, dynamic, and diverse portfolio of betting solutions.
- Developed online games such as Blackjack, Speed Blackjack, Absolute Blackjack and more.
Tech Lead
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.
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.
Founder / Full-stack Developer
This company develops web services and Chrome extensions for its Community Owners to increase their conversion rates and simplify workflows. Collected user input, chats and used AI to create summaries for sales calls and support requests.
- 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.
Technical lead / Senior Full-stack Developer
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.
- 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.
Senior Full-stack Developer
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.
- 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.
Tech Lead / Senior Full-stack Developer
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.
- 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.
Full-stack Developer
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.
- 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.
Full-stack Developer
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.
- 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.
Tech Lead / Contractor
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.
- 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.
Full-stack Developer
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.
- 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.
Lead Full-stack Developer
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.
- 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.