Chatbot Developer (WhatsApp, Telegram, Discord) - Freelance at Mindrift | Berlin, DE | Rezi

Chatbot Developer (WhatsApp, Telegram, Discord) - Freelance at Mindrift

Chatbot Developer (WhatsApp, Telegram, Discord) - Freelance

Mindrift · Berlin, DE

1 months ago

Chatbot Developer (WhatsApp, Telegram, Discord) - Freelance

Mindrift · Berlin, DE

2 months ago
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About the Role

Join the Tendem project to build conversational bots and messaging-platform integrations for real-world applications using your bot engineering expertise, conversational design skills, and quality-focused approach to build reliable, useful bots and messaging integrations that deliver a great user experience.

Responsibilities

  • Build bots for one or more messaging platforms, such as WhatsApp (Business API / Cloud API), Telegram (Bot API), Discord, Slack and similar messaging platforms.
  • Design and implement conversational flows, dialogue state, and fallback handling.
  • Integrate bots with LLMs (OpenAI, Anthropic, or similar) for natural language responses where appropriate.
  • Connect bots to backend services, databases, CRMs, and third-party APIs (booking systems, payment, content sources).
  • Handle webhooks, rate limits, and platform-specific message formats (interactive messages, buttons, media, templates).
  • Review, debug, optimize, and refactor bot implementations to improve correctness, reliability, maintainability, and graceful error handling.
  • Implement logging, monitoring, and recovery so bots stay healthy in production.

Requirements

  • At least 3 years of relevant backend, integration, automation, or bot development experience.
  • Strong foundation in bot development, messaging platform integrations, and building reliable conversational workflows.
  • Ability to design and maintain production-ready bots.
  • Confidence working with APIs, webhooks, and backend services.
  • Ability to build stable, user-friendly bot experiences.
  • Strong problem-solving skills, attention to detail, and the ability to work independently are essential.
  • At least 1 year of hands-on experience building bots for at least one major messaging platforms (WhatsApp, Telegram, Discord, Slack, or similar) is required.
  • Solid experience with REST APIs, webhooks, OAuth, and async request handling.
  • Experience with relational or NoSQL databases for storing conversation state and user data.
  • Experience with hosting and deployment (Docker, serverless, VPS, or PaaS).
  • Strong attention to detail and commitment to bot reliability — no silent failures, no broken flows.
  • Self-directed work ethic with the ability to design and ship complete bots independently.
  • Portfolio or examples of bots you've built (required).
  • English proficiency: Upper-intermediate (B2) or above (required).

Skills

  • WhatsApp Business API
  • Telegram Bot API
  • Discord API
  • Python
  • Node.js
  • REST APIs
  • webhooks
  • OAuth
  • async request handling
  • LLM APIs
  • prompt design
  • Docker
  • serverless
  • VPS
  • PaaS

Location

  • Remote

Work Type

  • Part-time
  • Freelance
  • Remote

Experience Level

  • At least 3 years of relevant backend, integration, automation, or bot development experience
  • At least 1 year of hands-on experience building bots for at least one major messaging platforms

Education Level

  • Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or related technical fields is a plus.

Salary/Compensations

  • Up to $60 per hour equivalent

Benefits

  • Work fully remote on your own schedule with just a laptop and stable internet connection.
  • Apply your expertise to real-world technology projects while gaining experience building high-quality solutions for a global platform.
  • Participate in performance-based bonus programs that reward high-quality work and consistent delivery.

About the Company

  • The Mindrift platform connects specialists with innovative technology projects.
  • Our mission is to help develop high-quality AI technologies by combining real-world expertise from professionals across the globe with advanced AI development efforts.