Senior Back-end Developer

About Us
We are an established game studio developing HeroWarrior, a Unity-based web battle game that has been in active development for three years. Our project is supported by GameWorld (Netherlands) and we're currently preparing for version 2.0 with an expanded development team.
Following strategic restructuring in 2022, we're now building a distributed team across Europe and seeking talented developers to join our long-term project.
Open Positions
We are actively recruiting for the following roles:
UI/UX Designer
Specialization in gaming interface design
Experience with Unity UI systems preferred
 
Full-Stack Developers
 
Backend and frontend development for web platform
Experience with game-related web services preferred
 
Mobile Developers
 
Native mobile app development
Cross-platform experience valued
 
Unity Developers
 
Gameplay mechanics implementation
3+ years Unity experience required
 
3D Web Developers
 
WebGL and Three.js expertise
Browser-based 3D rendering experience
 
hat We Offer
Project Commitment: We're seeking long-term partnerships, not short-term contractors. This is an opportunity to grow with an established project backed by industry partners.
Compensation Structure:
Flexible payment options: hourly rates, monthly retainers, or milestone-based compensation
Rates negotiable based on experience and role
Initial evaluation period followed by standard employment terms
 
Work Environment:
Remote-friendly distributed team
Collaborative development process
Opportunity to work on a commercially-backed game project
Application Requirements
 
Please submit the following:
Portfolio/Resume - Detailed work history and relevant projects
Rate Expectations - Your preferred compensation structure and rates
Code Samples - GitHub repository, portfolio links, or previous work examples
Availability - Expected start date and commitment level
Evaluation Process Acknowledgment - Confirmation of willingness to complete a brief technical assessment
 
Ideal Candidates
Demonstrated passion for game development
Strong technical skills in relevant technologies
Experience working on long-term projects
Collaborative mindset and professional communication
Interest in building innovative gaming experiences
 
Next Steps
We are moving quickly to fill these positions. Qualified candidates will be contacted within one week for initial discussions and technical evaluation.
To apply, please send your complete application materials to vlad@gameworldcompany.com
 

About the Company: 
Bitcastle is a cryptocurrency exchange and Forex (FX)platform which aims to create a new age of exchange where everyone can use it safely and have fun. As we expand and take a more active approach to global expansion, bitcastle is looking to hire a Full-TimeSocial Networking Service (SNS) Executive to join our team.
About the Role: 
We are looking for a Social Networking Service Executive to join the Bitcastle team. In this role, you will lead and execute our social media strategy to grow our brand presence across various platforms. You will manage content creation, community engagement, and campaign execution to strengthen our position in the crypto industry. This is a full-time, fully remote position.
Manage and maintain a strong presence across social media platforms, including X, Instagram, Facebook, LinkedIn, and TikTok, ensuring consistent messaging and tone
Conduct social listening to identify trending topics and emerging content within the cryptocurrency space
Monitor community feedback and collaborate with sponsorship, product, operations, content, and PR teams to deliver timely and relevant content
Create, curate, and manage engaging content tailored to each social media platform
Build and nurture a strong online presence by actively engaging with users, responding to inquiries, and fostering a positive community environment
Partner with communities and brands to boost visibility and establish meaningful collaborations
Track and analyze metrics such as engagement, reach, and growth across social accounts
Plan, execute, and manage social media campaigns, including product launches, contests, promotions, and events
Optimize campaigns to maximize user engagement and overall impact
Requirements: 
At least 2 years of experience in social media content creation and management
Proven ability to develop and execute successful content strategies
Experience using social media analytics tools 
Preferred Qualification: 
Prior experience in social media management within the crypto industry
Deep interest in Web3, blockchain, and cryptocurrency developments
Understanding of social media SEO principles and platform algorithms

Job Description:
Winnables.com is looking for a creative front-end-leaning Full Stack Developer who loves bringing slick, engaging user experiences to life while still caring about the behind-the-scenes details.
You’ll collaborate closely with designers and product leads, iterate quickly on new ideas, and see the direct impact of your work in the hands of players around the world.
If you enjoy mixing imaginative front-end polish with just enough back-end know-how to make the magic happen, we’d love to hear from you.
Key Responsabilities:
Transform design mock-ups and product concepts into polished, responsive game screens, animations, and flows.
Collaborate daily with designers, product leads, and blockchain engineers to prototype, ship, and iterate on new games or new features.
Continuously test, debug, and optimize for performance across devices and network conditions.
Review code, share best practices, and help keep our small codebase clean, secure, and easy to extend.
Use player feedback and analytics to refine existing features and guide new ideas from concept to launch.
Champion accessibility and web-standards compliance, ensuring every player—regardless of device or ability—has a first-class experience.
What You’ll Be Building
Build interactive mini-games that deliver smooth, responsive gameplay.
Create real-time multiplayer features and live game mechanics.
Develop pack-opening systems with eye-catching, engaging animations.
Engineer raffle and lottery-style games that are fully on-chain and provably fair.
Implement Plinko and other physics-based games, tuned for fun and balance.
Craft user-friendly interfaces that perform flawlessly across mobile, tablet, and desktop.
Qualifications:
Tech Stack:
Core: TypeScript · React & Next.js · Node.js · Zustand · WebSockets & REST
Data & Infra: PostgreSQL (Supabase) · Redis · Docker · GitHub
Observability: Grafana · PostHog
Design & Web3: Figma · viem / wagmi
What We're Looking For
Strong experience with TypeScript and modern JavaScript
Solid understanding of React and Next.js ecosystem
Experience building real-time applications with WebSockets
Familiarity with Node.js backend development
Knowledge of PostgreSQL and database design
Experience with responsive design and mobile-first development
Understanding of state management patterns (Zustand experience preferred)
Understanding of web security fundamentals (CSRF protection, secure authentication flows, input validation)
Interest in gaming mechanics and interactive user experience.
Nice to Have
Experience with gaming or interactive application development
Knowledge of blockchain technologies and Web3 integration
Familiarity with monitoring tools (Grafana, PostHog)
Experience with Docker and containerization
Understanding of real-time multiplayer game architecture
 
Company Description:
Winnables.com is on a mission to re-imagine iGaming through full on-chain transparency. We believe players deserve provably fair odds, transparent math, and no black-box RNGs. Every spin and ticket purchase is recorded immutably on Ethereum, so anyone can audit the outcome, track prize pools, or even build their own analytics on top of our contracts.
All of our games are designed and engineered 100% in-house by a small, senior team that blends game design, cryptography, and smart-contract security. We currently operate two flagship experiences:
Raffles – transparent prize drawings where every ticket lives on-chain, letting players verify fairness before and after the draw.
Loot Packs – blockchain-powered loot boxes that reveal randomized rewards with engaging pack-opening animations.
We’re still just getting started. The roadmap is full of green-field challenges—and real, measurable impact on an industry ripe for change. Join us and help craft the next generation of fair, fun, and truly player-owned gaming.

**Unity Senior Engineer **

Locations: United States, Remote.

About us:

Limit Break is a visionary company at the forefront of the mobile gaming industry, pushing boundaries and redefining digital markets. Our commitment to excellence, innovation, and community engagement sets us apart, offering unforgettable experiences globally.

Founded on impeccable craft and technological advancements, we are pioneers in creating vibrant gaming communities and elevating gaming economies to new heights. Join our trailblazing team to shape the future of mobile gaming and beyond.

Backed by prestigious investors, we are a dynamic, evolving force ready to welcome talented minds to drive change and innovation in the gaming landscape.

About the Role:

Looking to embark on an exhilarating venture, Limit Break seeks a standout Unity Engineer to lead the development of a cutting-edge mobile game. Your role will involve collaborating closely with a dynamic team, scaling the project from conception to production, and shaping the game's future direction.

This position offers an inquisitive individual the opportunity to assemble a top-tier team and influence the workflow for an ambitious gaming project, all within a passionate and experienced organization where creativity is celebrated.

As a core member of the team, you will actively contribute to shaping the gaming world and be part of a forward-looking, engaging team.

Responsibilities: What you’ll do

Design, implement, and maintain robust gameplay systems in Unity using C#

Collaborate with designers and artists to bring features to life

Develop modular, data-driven systems in Unity to enable response to configuration changes

Coordinate with the backend team for seamless client-server communication

Contribute to architectural decisions and mentor junior developers

Resolve performance, crashes, and build size issues using Unity's debugging tools

Drive features from concept to refinement, ensuring their polish and optimal performance

Qualifications: Who you are and what you’ve done

Over 8 years of game development experience, with more than 5 years in Unity

Proficiency in Unity, C#, and a comprehensive understanding of engine lifecycle

History of shipping live service games for mobile using Unity

Ability to work in an established Unity codebase, evolving and extending existing systems seamlessly

Proactive, feature-ownership mindset and strong communication skills for collaboration among team members

Deep knowledge of Unity architecture, including best practices for MonoBehaviours, ScriptableObjects, Prefabs, and Addressables

Capable of working independently while effectively communicating and collaborating with peers from various disciplines

Nice to have: What an ideal candidate looks like

Bilingual fluency in English and Japanese

Understanding of backend technologies like GoLang, Redis, SQL, and Docker

Experience with Free-to-play game titles

Familiarity with CI/CD pipelines

If you're seeking an exciting and dynamic role where you can thrive, consider applying to join our innovative global team. We value diversity and are committed to providing equal opportunities for all applicants.

Overview

Our client is in search of a skilled Game Artist specialized in Unity to join their innovative game development team focused on advanced AI-driven gaming experiences. In this role, you will play a key part in translating artistic concepts into technically feasible solutions, ensuring the game's visual aspects are not only captivating but also run smoothly. The preferred candidate should have a solid game art background and hands-on familiarity with implementing Unity.

Responsibilities

Create game art and related assets for in-game incorporation.

Develop and merge particle systems, animations, and other visual elements within Unity.

Optimize game assets and visuals to uphold top performance across various platforms.

Design shaders and visual effects by utilizing Unity Shader Graph.

Collaborate with the game development team to facilitate the seamless integration of visual components.

Requirements

Bachelor's degree in Game Design, Computer Graphics, or a related discipline, or equivalent practical experience.

Proficient in 3D modeling and rigging methods.

Strong competency in character animation.

Familiarity with Spine 2D for the integration of 2D animations.