Development & IT Consultation with Konstantin K.
Development & IT Consultation with Konstantin K.
ā Expertise at your service: I'm a Full Stack Developer, AI integrator, and Tech Lead at Halo Lab, with deep experience in software development, AI & Machine Learning, IT infrastructure, and modern stacks like React, Node.js, and Python.
ā Precision evaluation: You'll get a clear review of your project's architecture, code quality, and scalability - across Web Development, SaaS Development, or AI Agent Development with LangChain and the OpenAI API - plus the risks, quick wins, and next steps that matter.
š¦ Deliverables: A technical assessment, tailored advice, and actionable steps to solve your issues.
Backed by Halo Lab's record: a 4.9ā Clutch rating, 70+ awards including Top-1 Dribbble Team, 100% Job Success on Upwork, and 60+ projects a year for clients like Corel and Oppo who've raised over $500M+.
Get personalized advice on:
IT Support & Services
Mobile App Development
QA Testing
Web Programming
Website Builders & CMS
web development
front-end development
back-end development
web application development
Youāre covered with payment protection so you can cancel and get a full refund up to 24 hours before your consultation.
About Konstantin
LLM Rag | OpenAI | AI integration specialist | AI agents | AI ML
100%
Job Success
Yuzhne, UkraineĀ - 5:14 am local time
Hi, I'm Konstantin, a Full Stack Developer, AI integrator, and Tech Lead at Halo Lab. With over 20 years of hands-on experience, I've led 40+ successful projects across industries, combining deep technical know-how with a strong focus on communication, speed, and quality. When you work with me, you get more than code, you get clarity, structure, and real results.
AI & Machine Learning Focus
ć»Integration of OpenAI APIs and custom AI pipelines
ć»Building Large Language Model and Retrieval Augmented Generation pipelines with LangChain, Pinecone, and VectorDBs
ć»LLM Rag fine-tuning using OpenAI's tools and open-source models
ć»Prompt engineering, evaluation metrics, and AI use-case design
ć»AI Agent Development: intelligent agents, custom chatbots, embeddings & search
ć»Deep Learning, TensorFlow, Data Mining, Data Analysis, and Machine Learning solutions
ć»Data Scraping and automation for AI-powered products
Full Stack + AI Development Stack
Frontend: React, ReactJS, NextJS, VueJS, TypeScript, JavaScript, GraphQL, WebSockets, PSD to HTML
Backend: Node.js, NodeJS, NestJS, Express, Python, Django, FastAPI, LangChain
AI/ML: OpenAI, Hugging Face, LangChain, Pinecone, Weaviate, ChromaDB, TensorFlow
Data: PostgreSQL, MongoDB, Supabase, Redis
DevOps: Docker, AWS, CI/CD, Terraform, Vercel
Testing & QA: Cypress, Jest, Playwright
Security: OAuth2, JWT, API Rate Limiting
š What I Offer
LLM Rag System Design & Implementation ā Build intelligent systems that combine search with generative AI
AI-Powered MVPs ā Rapid prototyping of AI-native apps for startups and internal tools
LLM Rag Fine-Tuning & Prompt Optimization ā Custom-tailored model behavior for your specific data and audience
Full Stack & SaaS Development ā From zero to launch: architecture, frontend, backend, infrastructure, and Web Development
Design Systems & Component Libraries ā Clean, scalable, reusable UI with Storybook
Automated QA ā Ensuring reliability through custom test suites and CI integration
Project Onboarding Process
Discovery & Requirement Gathering
Architecture & Tech Spec Writing
Roadmapping & Timeline Setup
Agile Iteration & Delivery
QA, Handoff & Support
If you're looking for someone who can bridge AI innovation with battle-tested full-stack engineering, I'm here to help bring your vision to life: efficiently and with technical excellence.
š© Let's connect and build something remarkable.
What to expect
Schedule the consultation
Choose from the freelancerās available days and times.
Get advice for your custom needs
Share details about your project and what you want to talk about. The freelancer will review and reach out if they have questions.
Join the Zoom meeting
1-on-1 meeting with the freelancer to discuss your needs and project.
Approve the work
The freelancer will finish up the documents you asked for and send them to you for approval:
Before the consultation
Hereās what Konstantin will need to know before you meet
- Let me know your issues and what goals, you want to reach?
(4)
(4)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
KR
Kelson R.
Nov 20, 2024
Fix bugs in React Native / Expo app for Android
We had a very successful partnership! We are a startup with a React Native / Expo mobile app, and Konstantin / the Halo Team helped us build numerous new features, fix bugs, and improve the app performance. His communication is also excellent, both English aptitude + clearly organiz ed status updates & discussion. Highly recommend!
TC
Tyler C.
Nov 30, 2023
Progressive Web App - Convert Website to pwa
I highly recommend the team at Halo Labs for your full stack development needs.
KR
Kelson R.
Nov 29, 2023
React-pdf Formatting
Halo Lab is the highest quality partner that we have had. Their English ability is excellent, they are great developers with attention to detail. I highly recommend them. In fact, we are still working with them on another project.
IZ
Igor Z.
Aug 16, 2023
Experienced Senior Full Stack Developer for Ongoing Projects
Konstantin has been absolutely fantastic to work with! He's really knowledgeable and was super helpful with areas I wasn't too sure about. Once he gets a grasp of what needs to be done, he tackles it swiftly. We're definitely looking forward to teaming up with Konstantin again in the future. Thanks a bunch for your excellent work once more!