Senior UE5 Gameplay Engineer — Remote & GAS

Jagex; Cambridge; Hybrid; GBP 26,000 - 66,000; Full time

Benefits offered by this job

Private healthcare with dental plan

Discretionary annual performance bonus

6% pension contributions

Life insurance

Enhanced family leave from day 1

Flexible working hours

25 days annual leave + bank holidays (

Buy/sell holidays

Job summary

Jagex, The RuneScape Company, is hiring a Senior Gameplay Engineer in Cambridge with flexible working options, including predominantly remote work and onsite attendance as required.

You will own UE5 C++ gameplay features, implement GAS-based abilities, and build scalable networked systems while collaborating with designers to iterate quickly. The role emphasizes performance, debugging, and delivering at scale within a sizeable team.

Qualifications

• Strong Unreal Engine (UE5) gameplay programming experience in C++, with Blueprint familiarity for collaboration and iteration.
• Strong multiplayer networking knowledge in Unreal: replication, RPCs, the authority model, relevancy and dormancy, prediction concepts, and client and server debugging.
• Proven ability to work directly with designers to iterate quickly while keeping implementations scalable and maintainable.
• Experience building and maintaining gameplay systems such as player abilities, combat, progression, items and UI-facing gameplay hooks, with practical GAS experience and a background shipping and supporting live multiplayer games a strong advantage.
• Solid debugging and performance awareness, including profiling gameplay code and diagnosing desyncs and edge cases.
• Strong code quality habits across testing, code reviews, documentation and refactoring, and demonstrable experience delivering at scale on sizeable teams.
• Permanent right to work in the UK, with no requirement for visa sponsorship.

Responsibilities

• Own and implement gameplay features in UE5 C++ and Blueprint, using GAS for abilities, attributes, effects, cues and tags, taking an area from prototype to shipped so there is one person accountable for how it plays.
• Design and maintain reusable gameplay frameworks and components aligned with GAS-first patterns, giving designers room to iterate quickly without a programmer in the loop for every change.
• Build networked gameplay that replicates correctly and feels responsive, working with prediction, authority, RPCs and relevancy, because the networking model decides whether gameplay feels good or feels broken.
• Collaborate with designers to iterate on combat, abilities and systems, protecting technical integrity while still landing the version that plays best.
• Debug gameplay issues across client and server, from desyncs and edge cases to live repros, keeping the game stable while the team ships at pace.
• Profile and optimise gameplay code against performance and bandwidth targets so systems hold up as the game and its player counts scale.

Skills

Unreal Engine gameplay

C++

Blueprint scripting

Multiplayer networking

GAS (Gameplay Ability System)

Design collaboration

Profiling & debugging

Code quality & reviews

UK work eligibility

Tools

Unreal Engine

Blueprint

Profiling tools

Job description

Jagex, The RuneScape Company, is hiring a Senior Gameplay Engineer in Cambridge with flexible working options, including predominantly remote work and onsite attendance as required.

You will own UE5 C++ gameplay features, implement GAS-based abilities, and build scalable networked systems while collaborating with designers to iterate quickly. The role emphasizes performance, debugging, and delivering at scale within a sizeable team.