You will get Full Stack Developer | Agile Development with Node.js, Express, NestJS
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Project details
š Specializing in Node.js, Express, and NestJS, we excel in cutting-edge back-end technologies. Node.js for scalable apps, Express for robust solutions, and NestJS for modular, versatile, and maintainable server-side applications.
Starting a complex project:
ā Software Requirements Workshop: A discussion with our Business Analysts to gather crucial information, laying the foundation for your solution's blueprint.
Performed By: Business Analyst
ā Software Requirements Document and Architecture Design: Refining specifications and crafting a high-level plan, defining components, modules, and ensuring scalability and reliability.
Performed By: Business Analyst, Lead Developer
ā Timeline and Roadmap: Crafting a detailed project timeline, breaking down implementation into milestones, ensuring an organized and efficient development process.
Performed By: Project Manager
Ready to shape your software solution from concept to a structured plan? Let's collaborate to define the roadmap for your project's success!
š Before making a purchase, let's have a quick intro call to understand your requirements better.
Starting a complex project:
ā Software Requirements Workshop: A discussion with our Business Analysts to gather crucial information, laying the foundation for your solution's blueprint.
Performed By: Business Analyst
ā Software Requirements Document and Architecture Design: Refining specifications and crafting a high-level plan, defining components, modules, and ensuring scalability and reliability.
Performed By: Business Analyst, Lead Developer
ā Timeline and Roadmap: Crafting a detailed project timeline, breaking down implementation into milestones, ensuring an organized and efficient development process.
Performed By: Project Manager
Ready to shape your software solution from concept to a structured plan? Let's collaborate to define the roadmap for your project's success!
š Before making a purchase, let's have a quick intro call to understand your requirements better.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included $50
These options are included with the project scope.
$50
- Delivery Time 30 days
- Number of Revisions 2
- Design Customization
- Content Upload
- Responsive Design
- Source Code
4 reviews
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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!
About Konstantin
LLM Rag | OpenAI | AI integration specialist | AI agents | AI ML
100%
Job Success
Yuzhne, UkraineĀ - 5:41 pm 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.
Steps for completing your project
After purchasing the project, send requirements so Konstantin can start the project.
Delivery time starts when Konstantin receives requirements from you.
Konstantin works on your project following the steps below.
Revisions may occur after the delivery date.
Detection of the client's request