Sebastian Glahn

Rising Codementor

US$20.00

For every 15 mins

First 15 mins free for your first session

ABOUT ME

Senior Dev | AI Integrations, Next.js, React, Node.js

Hey there!

I'm Sebastian, a Senior Software Engineer with 14+ years of crafting high-quality software. I blend deep technical expertise with a business mindset (B.A. International Business + M.Sc. Computer Science) to deliver creative, structured solutions that drive real value—always following SOLID principles, clean code, and TDD.

Currently, I lead development at Aihoo (aihoo.ai), building an innovative AI platform for multi-chatbot interactions, comparative analysis, Meta Refine mode, and AI Winner Picker. Since 2023, I've specialized in AI-powered apps: real-time streaming chats, tool-calling agents, provider-agnostic LLM setups using Vercel AI SDK.

As a freelancer, I've delivered dozens of web, mobile, and AI projects for international clients, focusing on scalable, user-centric solutions with measurable ROI. Recent highlights include LevelApp (cross-platform React Native gaming/social app with IGDB integration, 1,000+ users, strong conversion in Germany) and speaking at Google Dev Event 2024 about Aihoo.

I love mentoring—let's solve your challenges together, improve your code architecture, and get your project production-ready without headaches.

Fluent in English, Spanish, German. Based in Santa Cruz, Bolivia.

Let's work together!

German, Spanish, English

La Paz (-04:00)

Joined March 2020

EXPERTISE

Next.js

5 years experience

Building full-stack AI-powered web apps with server components, SSR/SSG, API routes, and Vercel deployments. Core stack for Aihoo and rec...

Building full-stack AI-powered web apps with server components, SSR/SSG, API routes, and Vercel deployments. Core stack for Aihoo and recent freelance projects.

Vercel ai sdk

3 years experience

Specialized since 2023 in LLM integrations: real-time streaming chats, tool-calling agents, provider-agnostic setups (OpenAI, Anthropic, ...

Specialized since 2023 in LLM integrations: real-time streaming chats, tool-calling agents, provider-agnostic setups (OpenAI, Anthropic, etc.), and advanced features like Meta Refine.

React

8 years experience

Expert in modern React (hooks, context, performance optimization); built complex UIs for web/mobile (including white-label apps for WDR a...

Expert in modern React (hooks, context, performance optimization); built complex UIs for web/mobile (including white-label apps for WDR and LevelApp gaming/social features).

TypeScript

7 years experience

Proficient in typed JavaScript/ES6+ standards; use it daily for scalable, maintainable code in Next.js, React Native, and Node backends.

Node.js

6 years experience

Backend development with Express/Nest-like patterns; powering APIs, real-time features, and LLM orchestration in freelance and Aihoo proj...

Backend development with Express/Nest-like patterns; powering APIs, real-time features, and LLM orchestration in freelance and Aihoo projects.

React Native

6 years experience

Cross-platform mobile apps (iOS/Android); led LevelApp (1,000+ users, IGDB integration) and white-label solutions for broadcasters.

Ai/llm technologies

3 years experience

Building AI agents, multi-chatbot platforms, streaming responses, and decision tools (e.g., AI Winner Picker at Aihoo).

REVIEWS FROM CLIENTS

Sebastian's profile has been carefully vetted and approved as a Codementor. Connect with Sebastian now, and leave a review for them once you're done!

SOCIAL PRESENCE

GitHub

react-education-app

This is an education App built with React, Redux, Node.js and MongoDB.

JavaScript

java-dungeon-game

A dungeon game made with Java. A good starting point to understand how games work.

Java

Community Posts

5 reasons you shouldn't integrate ready-to-use components into your project.

Just code it yourself.

EMPLOYMENTS

Development Lead

Aihoo

2023-12-01-Present

Leading development of an innovative AI web platform for simultaneous multi-chatbot interactions, comparative analysis, and response o...

Leading development of an innovative AI web platform for simultaneous multi-chatbot interactions, comparative analysis, and response optimization.
Implemented Meta Refine mode to synthesize top outputs and AI Winner Picker for best-model selection.
Specialized in real-time streaming chats, tool-calling agents, provider-agnostic LLM setups.

Currently part of Acceleratec startup accelerator in Bolivia.

PostgreSQL

Next.js

Tailwind css

PostgreSQL

Next.js

Tailwind css

Vercel ai sdk

Full Stack Freelancer

Self-employed

2014-01-01-Present

Delivered dozens of web, mobile, and AI projects for international clients, emphasizing scalable, user-focused solutions with measurab...

Delivered dozens of web, mobile, and AI projects for international clients, emphasizing scalable, user-focused solutions with measurable ROI.

Specialized in AI integrations since 2023: LLM agents, streaming, multi-provider setups.

Built production-ready apps following SOLID principles, clean code, and TDD.

Please visit: https://sebastianglahn.online/

Node.js

TypeScript

React

Node.js

TypeScript

React

React Native

Next.js

Vercel ai sdk

Mobile Development Lead

LevelApp

2019-01-01-2022-01-01

Developed and published a cross-platform mobile app (iOS/Android) combining gaming marketplace with social features for trading, chatt...

Developed and published a cross-platform mobile app (iOS/Android) combining gaming marketplace with social features for trading, chatting, and community building.

Integrated IGDB API for 300,000+ game/console database, advanced filters, geolocation, notifications, social profiles.

Achieved 1,079+ users and 18–27.5% conversion rate in Germany post-launch.

Node.js

Firebase

React Native

Node.js

Firebase

React Native

PROJECTS

React Native white label App

2019

My most recent project was a react native app for the largest public Brodaster in Germany ( WDR ). The app was architectured in a white...

My most recent project was a react native app for the largest public Brodaster in Germany ( WDR ). The app was architectured in a white label style which meant that the base code had to be able to produce different apps with different styles but equivalent functionality. Naturally, this made the app far more complex and architecture as well as code structure had to be thought out carefully. The project environemnt consisted of the following elements: - TypeScript - React Native Hooks - CI systems with github actions - Git Flow

TypeScript

React Native

TypeScript

React Native

AihooView Project

2025

Led development of an innovative web platform enabling simultaneous multi-chatbot interactions for comparative analysis and response opti...

Led development of an innovative web platform enabling simultaneous multi-chatbot interactions for comparative analysis and response optimization. Built real-time streaming chats, tool-calling agents, Meta Refine mode (synthesizes top outputs), and AI Winner Picker (selects best model). Delivered provider-agnostic LLM integrations for flexible, scalable AI experiences. Part of Acceleratec accelerator program in Bolivia. Technologies: Next.js, Vercel AI SDK, Tailwind CSS, PostgreSQL, TypeScript, LLM Integrations Link: https://www.aihoo.ai

PostgreSQL

TypeScript

Next.js

PostgreSQL

TypeScript

Next.js

Tailwind css

LLM

Vercel ai sdk