Unreal Multiplayer Developer (Mid/Senior)

Inoutbox
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Posted
November 29, 2025
Contract
NA, SA, or EU
Remote

We are looking for an experienced Unreal Engine Multiplayer Developer with strong knowledge of multiplayer gameplay architecture, replication, networking, and scalable system design.

You will work closely with the game designer and technical animator to build stable and performant multiplayer features for our co-op horror puzzle game.

Responsibilities

  • Develop and maintain multiplayer gameplay systems using Unreal Engine 5.6 (C++ only, NO Blueprints)
  • Implement and optimize replication logic, RPCs, networked character interactions.
  • Design clean multiplayer architecture, including player states, game states, sessions (Steam Lobby would be plus), lobbies, and matchmaking logic.
  • Ensure stable synchronization between clients in complex co-op scenarios (puzzles, physics interactions, character abilities).
  • Work with animation and gameplay teams to integrate multiplayer-safe locomotion, interaction and combat systems.
  • Profile and troubleshoot network issues (latency, desync, packet loss, server load).
  • Optimize performance for both server and client (bandwidth, CPU, memory).
  • Help define best practices for multiplayer code structure and workflow.

Requirements

  • Experience in Multiplayer game development under UE in a must.
  • Additional plus work with Steam lobby

Project Details

  • Position: Unreal Engine Multiplayer Developer
  • Level: Mid/Senior
  • Type: Contract / Freelance (with potential long-term collaboration)
  • Location: North America, South America, or Europe (time-zone alignment required)
  • Engine: Unreal Engine 5.6
  • Project: Co-op Horror Puzzle Adventure (PC)
  • Mode: Fully Remote

Timezone note:

We are currently only considering candidates based in North America, South America, or Europe due to timezone overlap.

Additional Information

This is a short-term project, and we fully support candidates who wish to combine it with an existing job. We value reliability, communication, and high-quality craftsmanship.

No studios

About
Inoutbox

At InOutBox, we bring a refreshing perspective to game development, and we believe it’s high time to rewrite the rules of the game. Our motto is simple yet profound: Players first. We are not just game developers; we are passionate gamers building games for gamers.

Our journey begins with a commitment to put players at the heart of everything we do. We understand that games should be about the players’ enjoyment, their epic adventures, and their unforgettable moments. We’re rewriting the script to ensure that every player feels like the true protagonist of our games.

We’re not just another game company; we’re a community. Open development is our anthem. We actively listen to players, openly share insights and updates, and engage in a two-way dialogue to understand everyone’s needs and aspirations. We’re charting a course to create games that genuinely resonate with you, our fellow adventurers.

Passion for games courses through our veins. We’re not just passionate developers; we’re fervent gamers with a deep love for the craft. Our commitment to transparency, player-centricity, and creativity is unwavering. We’re in this for the long haul, and we invite you to join us on this extraordinary gaming journey. Together, we’ll make every game a legendary experience.

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