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Serhii L. - Fullstack Developer, LLM Prompt Engineering, GPT Chatbot

My journey at Softaims has been defined by curiosity, growth, and collaboration. I’ve always believed that good software is not just built—it’s carefully shaped through understanding, exploration, and iteration. Every project I’ve worked on has taught me something new about how to balance simplicity with depth, and efficiency with creativity. At its core, my work revolves around helping businesses and people achieve more through thoughtful technology. I’ve learned that the most successful projects come from teams that communicate openly and stay adaptable. At Softaims, I’ve had the opportunity to work alongside professionals who challenge assumptions, share knowledge generously, and inspire continuous improvement. I take pride in focusing on the fundamentals—clarity in logic, consistency in design, and empathy in execution. Software is more than a set of features; it’s a reflection of how we think about problems and how we choose to solve them. By maintaining this perspective, I aim to build solutions that are not only effective today but also flexible enough to support the challenges of tomorrow. The culture at Softaims promotes learning as an ongoing process. Every new project feels like a step forward, both personally and professionally. I see each challenge as a chance to refine my skills and contribute to the shared vision of building technology that genuinely improves lives.

Main technologies

  • Fullstack Developer

    10 years

  • node.js

    6 Years

  • TypeScript

    9 Years

  • JavaScript

    3 Years

Additional skills

  • node.js
  • TypeScript
  • JavaScript
  • LangChain
  • OpenAI API
  • Firebase
  • Firebase Cloud Firestore
  • Google Cloud
  • PostgreSQL
  • Redis
  • Git
  • LLM Prompt Engineering
  • GPT Chatbot

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Experience Highlights

Mental Health Support App | Node.js, NLP

Duration: 7 months Developed NestJS Back-end for a Flutter application and admin dashboard. My responsibilities: - Database architecture - Media upload to AWS S3 - Recommendation algorithm (NLP tokenization) - Stripe billing integration - Internal currency and rewards logic - Admin dashboard - Setup CI/CD, Docker container - Postman API Documentation

Lead Generation Platform | Node.js, AI

Duration: 1 year and 1 month Developed a high-performance Lead Generation platform with AI-driven automated SMS campaigns. Responsibilities: - Designed and implemented a 3-layer server architecture - Managed PostgreSQL database administration - Integrated OpenAI API for AI-driven features - Integrated Twilio, Telnyx, and Plivo for SMS automation - Implemented Stripe for billing and payments - Performance optimizations - Data migration, Google Pub/Sub

AI Chatbot MVP | LangGraph, Next.js

Duration: 2 weeks Developed an AI assistant that processes doctor-patient audio recordings, extracts key information, and manages patient medical history. My responsibilities: - LangGraph agent architecture - Assembly AI integration for transcribe - OpenAI API integration - PDF / Docx generation

White Label Crypto Wallet App | NestJS, Blockchain

Duration: 5 months Held full responsibility for standalone microservices in a white-label crypto-fiat exchanger. My responsibilities: - Integration of Crypto Exchanges - Payment Gateway - Database architecture

Education

  • Physics and Technical Lyceum (PTL)

    High school degree in Computer science

    2009-01-01-2012-01-01

Languages

  • English
  • Russian
  • Ukrainian

Personal Accounts