Senior Backend Engineer (Golang) - Paper.io2

Voodoo

ABOUT VOODOO Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. TEAM At BeReal, we are dedicated to authenticity in social media. By encouraging users to share unfiltered moments, we foster genuine connections and celebrate real life. We are now an international team of 100+ and have 40M+ monthly active users. Backed by Voodoo, our team is fully focused on scaling BeReal into an iconic social network used by hundreds of millions. ROLE We’ve built BeReal with a tiny technology team of world-class engineers and we intend to keep this mindset as we scale it to hundreds of millions of users. To achieve this, we ship new features faster than any other scaled social network while upgrading our infrastructure. We work in small teams of generalists and give each engineer high autonomy to make product related decisions. * Tackle exciting technical challenges, given the nature of our product, which experiences spikes of millions of users connecting within a 2-minute window. * Contribute to the development of a robust architecture capable of supporting massive scale as we attract new users and expand to new countries. * Collaborate with the product and engineering teams to create new features for the app. * Analyze trade-offs and address technical challenges related to key components of our backend. * Participate in code and design reviews. OUR STACK * Infrastructure: GCP, Kubernetes, Pub/Sub, GitHub actions, and ArgoCD. * Backend: Go, Node.js (NestJS, Nx, Typescript) * Frontend: Swift (iOS), Kotlin (Android). * Database: Spanner, PostgreSQL, Redis. PROFILE * You have 5+ years of experience working on API on distributed architecture. * You have a proven experience in Go and contribute to developing high volume API microservices. * You are self-reliant and have prior experience in a startup or similar environment. * You value teamwork and thrive on challenges. * You are proficient in English as our team is diverse and international. * You have a master degree in computer science or related field. * Most importantly, you believe in the project, are motivated, and eager to embark on an exciting and challenging journey. BENEFITS * Competitive salary upon experience * Swile Lunch voucher * Gymlib (100% borne by Voodoo) * Premium healthcare coverage SideCare, for your family is 100% borne by Voodoo * Wellness activities in our Paris office

Voodoo

ABOUT VOODOO Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is Paris-based, with relocation support available. TEAM For this position, you will be an integral part of a newly established internal studio, a dynamic and focused team dedicated to one of our most promising prototype in scale. This studio is specifically chartered to improve this high-potential game up to the successful and market-ready title it is meant to become. You will be part of the team building Castle Busters, a turn-based multiplayer game, working alongside its client engineers and game designers as a full member of the game team. You will be part of a small group owning the backend that this game needs as its requirements become more specific and demanding. You’ll also be plugged into Voodoo's shared gaming backend platform - the same architecture and patterns that power titles like Mob Control and Block Jam 3D - building on it and contributing back, in close collaboration with the wider backend team. You get the focus and ownership of a dedicated game engineer with the leverage and support of a battle-tested platform behind you. This is a pivotal hire: Castle Busters is moving towards competitive multiplayer, which means moving game logic from the client to the server. You will be central to that transition. ROLE You will design and build the server-side foundation that takes Castle Busters from a client-authoritative game to a competitive, server-validated one. The current game computes everything on the device - progression, economy, and match outcomes alike, which won't hold up for competitive PvP. Your job is to change that. Working closely with client developers and game designers from feature design through delivery, validation and iteration, you will: * Build server-side validation for the metagame - currency, card upgrades, chest opens, and progression - staged by risk, replicating economy and reward logic on the server. * Move toward server authority for competitive features, where game state lives in one place and can be trusted. * Design APIs and player-state management that the Unity client integrates against, and help shape how client and server split responsibilities. The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration (we are using Golang). To succeed in this role, you will need to have passion for everything you do. You love to write code that scales to millions of users, are skilled at requirements gathering, champion new tech initiatives & leverage existing solutions. PROFILE * 7+ years of backend development experience * Strong knowledge of computer science fundamentals * Extreme fluency in Golang (At least 1 year in a professional environment) * Mastery of SQL and NoSQL * Background in high-scale systems * Understanding of Unix-like environments * Experience working in cross-functional agile teams * Strong analytical skills with a track record of solving complex problems related to scalability, performance, and integration in high-stakes environments. * Excellent interpersonal and communication skills, capable of influencing teams and interfacing effectively with various stakeholders. * Ability to be self sufficient and work autonomously. * A deep interest in game development is a plus. BENEFITS * Best-in-class compensation * Other benefits according to the country you reside

Voodoo

ABOUT VOODOO Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is Paris-based, with relocation support available. TEAM For this position, you will be an integral part of a newly established internal studio, a dynamic and focused team dedicated to one of our most promising prototype in scale. This studio is specifically chartered to improve this high-potential game up to the successful and market-ready title it is meant to become. You will be part of the team building Draft Showdown, a turn-based multiplayer game, working alongside its client engineers and game designers as a full member of the game team. You will be part of a small group owning the backend that this game needs as its requirements become more specific and demanding. You’ll also be plugged into Voodoo's shared gaming backend platform - the same architecture and patterns that power titles like Mob Control and Block Jam 3D - building on it and contributing back, in close collaboration with the wider backend team. You get the focus and ownership of a dedicated game engineer with the leverage and support of a battle-tested platform behind you. This is a pivotal hire: Draft Showdown is moving towards competitive multiplayer, which means moving game logic from the client to the server. They are also implementing cheat detection safeguards to the game. You will be central to that transition. ROLE You will design and build the server-side foundation that takes Draft Showdown from a client-authoritative game to a competitive, server-validated one. The current game computes everything on the device - progression, economy, and match outcomes alike, which won't hold up for competitive PvP. Your job is to change that. Working closely with client developers and game designers from feature design through delivery, validation and iteration, you will: * Build server-side validation for the metagame - currency, card upgrades, chest opens, and progression - staged by risk, replicating economy and reward logic on the server. * Move toward server authority for competitive features, where game state lives in one place and can be trusted. * Implement and improve matchmaking and cheat detection safeguards for a Deterministic lockstep PvP architecture * Design APIs and player-state management that the Unity client integrates against, and help shape how client and server split responsibilities. The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration (we are using Golang). To succeed in this role, you will need to have passion for everything you do. You love to write code that scales to millions of users, are skilled at requirements gathering, champion new tech initiatives & leverage existing solutions. PROFILE * 5+ years of backend development experience * Strong knowledge of computer science fundamentals * Extreme fluency in Golang (at least 1 year in a professional environment) * Mastery of SQL and NoSQL * Background in high-scale systems * Understanding of Unix-like environments * Experience working in cross-functional agile teams * Strong analytical skills with a track record of solving complex problems related to scalability, performance, and integration in high-stakes environments. * Excellent interpersonal and communication skills, capable of influencing teams and interfacing effectively with various stakeholders. * Ability to be self sufficient and work autonomously. * A deep interest in game development is a plus. * Based or willing to relocate in Paris BENEFITS * Best-in-class compensation * Other benefits according to the country you reside