Erlang Developer

Role Overview

Senior Erlang Developer

Key Responsibilities

• Design, build, and maintain

  real-time, low-latency messaging services

  using

  Erlang/OTP

  .
• Implement and optimize protocols such as

  XMPP

  ,

  MQTT

  , or custom lightweight messaging protocols.
• Build fault-tolerant, distributed backend services capable of scaling horizontally.
• Develop presence systems, user state management, chat history storage, and message delivery tracking.
• Work closely with mobile and frontend teams to integrate APIs and messaging features.
• Contribute to the architecture of end-to-end encryption, message queues, and storage strategies.
• Monitor system performance and implement improvements to reduce latency and resource usage.
• Ensure high availability and zero-downtime deployments with rolling updates and clustering strategies.
• Collaborate in code reviews, architectural discussions, and feature planning sessions.

Must-Have Qualifications

• 5+ years of production experience with

  Erlang/OTP

  , ideally in

  real-time systems

  .
• Solid understanding of

  distributed systems

  ,

  event-driven architecture

  , and

  concurrent programming

  .
• Experience working with messaging protocols (e.g.,

  XMPP

  ,

  MQTT

  ,

  WebSockets

  ).
• Familiarity with

  Mnesia

  ,

  Riak

  , or similar distributed databases.
• Proficiency in building and scaling systems that handle

  millions of concurrent users

  .
• Knowledge of

  fault tolerance

  ,

  hot code swapping

  , and

  system uptime strategies

  .
• Strong understanding of

  networking, sockets

  , and

  asynchronous I/O

  .
• Experience with

  monitoring tools

  (e.g., Grafana, Prometheus) and

  log aggregation

  .

Nice-to-Have

• Experience with

  push notification systems

  (APNs, FCM, etc.).
• Exposure to

  end-to-end encryption

  , cryptographic protocols, and secure messaging architectures.
• Familiarity with

  Elixir

  or willingness to work in an Erlang/Elixir hybrid environment.
• Understanding of

  containerized deployments

  (Docker, Kubernetes).
• Contributions to open-source Erlang projects or messaging libraries.