Job Description

Senior Backend Engineer (C#, Live Service / UE5 Game)

About the Role
We are developing a third-person competitive shooter in Unreal Engine 5 , currently in beta testing , with a strong focus on long-term player retention and monetization systems (battle pass, seasons, progression, cosmetics, daily/weekly quests).
This role is backend-focused: building and evolving the services that support a live game at scale. You will be working on an already running system, improving, extending, and stabilizing it for release and live operations, while collaboration with a team of 10 backend developers and UX designers.

Required Qualifications
We are looking for a senior engineer who can take ownership of complex systems in an existing production environment , not just build prototypes.
Strong experience with:

C#

gRPC / Protobuf

Distributed systems

Orleans

Kubernetes

Databases:
- MongoDB (or other NoSQL)
- PostgreSQL (transactional systems)

Event-driven systems

Observability tools
Additionally:

live-service systems in production

monetization systems

Steam MTX/payment APIs

console certification constraints

multi-team environments with existing codebases
- Solid Git workflow knowledge (GitFlow or similar)

Responsibilities
- Extend and maintain backend systems for: Battle pass and seasonal progression Daily/weekly quests and reward pipelines Player inventory, currencies, entitlements Storefront and monetization flows

existing backend architecture

data integrity and exploit resistance

economy balancing and live tuning
- Integrate and maintain connections with external platforms: Steam and console services (payments, entitlements, accounts)

live operations

technical decisions

Nice-to-Have / Bonus Skills

Agones

live-service game post-launch

anti-fraud / anti-cheat mechanisms

beta or live environments

What We Offer

Warsaw
- Established project with an active player base
- Real impact on systems that directly affect player experience and revenue
- Competitive salary (depending on experience)
- 20 paid days off

How to Apply
Please include:

LinkedIn
- Description of backend systems you’ve worked on in production (scale, responsibilities, challenges)