Senior Back-end Developer

Game Concept: “Reflex Arena”
Genre
Real-time competitive 1v1 / 2v2 skill-based action game
Platform
iOS (iPhone first, iPad optional)
Core Idea
A pure skill game where players compete in short, intense arena matches using precision timing, reflexes, and positioning — no RNG, no pay-to-win.
Each match lasts 60–90 seconds, making it ideal for mobile sessions while supporting competitive depth.
Core Gameplay Loop
Matchmaking
Skill-based MMR
Ranked & unranked queues
Arena Match
Small symmetrical arena
Players control a single character
Objective: score points by outplaying, not overpowering
Score & Progress
Win → rank up
Lose → learn (clear replay & stats)
Cosmetics only progression
Controls (Mobile-First, High Precision)
Left thumb: Movement (virtual joystick)
Right thumb: Aim + action swipe
Tap: Ability activation
Perfect timing windows reward precision (parries, counters)
👉 Designed to feel closer to a fighting game than a casual mobile title.
Mechanics (Skill > Stats)
Core Mechanics
Dash with cooldown (positioning skill)
Timed parry (frame-perfect defense)
Charged shots (risk vs reward)
Combo chaining (execution mastery)
No Randomness
Fixed damage
Fixed cooldowns
No crit chance
No loot boxes
Competitive Depth
Skill Expression
Reaction time
Prediction & mind games
Spacing & arena control
Cooldown tracking
Skill Ceiling
Easy to learn (1 minute)
Hard to master (1000+ matches)
Game Modes
Ranked Duel (Main Mode)
1v1
Best of 3 rounds
Seasonal leaderboard
Team Arena
2v2 coordinated play
Shared objectives
Training / Practice
Frame timing visualizer
Ghost replays of top players
Visual Style
Clean, minimalistic sci-fi arenas
High contrast for readability
60–120 FPS target (ProMotion)
👉 Performance clarity > visual noise.
Monetization (Fair & Competitive)
Skins (characters, arenas, effects)
Emotes / victory poses
Battle pass (cosmetic only)
🚫 No power boosts
🚫 No energy timers
🚫 No loot RNG
Technical Design (iOS-Optimized)
Native Swift
Metal / SpriteKit
Deterministic simulation
Server-authoritative logic
Rollback netcode (if real-time PvP)

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

About Us

Deep expertise, personal and industry growth, and excellent craftsmanship are the core values that drive Limit Break as a company.

Limit Break was established by prominent figures in the mobile gaming industry with a vision to expand its impact beyond games and into digital markets, transforming them into real-world economies and creating vibrant player communities in digital worlds. Combining innovative technology with creative vision, we are at the forefront of pushing the boundaries of gaming economies for players and traders alike.

With the support of reputable investors such as Buckley Ventures and Paradigm Ventures, Limit Break is pioneering the next wave of technological advancements, where gaming serves as the catalyst for the convergence of digital ownership, economies, and global connectivity.

About the Role

Limit Break is seeking a Technical Director for Games to oversee our Unity engineering division on a global scale. In this integral role, you will be responsible for the implementation, performance, and advancement of Unity-based development for our mobile-first, live service games. Collaborating closely with Art, Product, Design, QA, and Platform departments, you will ensure our Unity engineers deliver top-notch, scalable, and high-performance game experiences. Taking a hands-on approach to leadership, you will concentrate on team execution, technical excellence, and fostering scalable development practices to ensure our international teams are aligned, efficient, and empowered for agile progress. Your pivotal role will involve connecting global teams, standardizing workflows, and ensuring consistency in Unity development.

Responsibilities: What You'll Do

Key responsibilities include:

Leading and overseeing a global team of Unity engineers to ensure effective execution, clear accountability, and synchronization across time zones.

Mentoring and developing Unity engineers, integrators, and technical contributors to deliver high-quality, high-performance solutions.

Driving best practices for Unity development, encompassing architecture, performance enhancements, scalability, and sustainability.

Establishing and enhancing engineering workflows that facilitate speedy iteration, efficient collaboration, and reliable releases.

Managing and advancing shared Unity frameworks, tools, and integrations to expedite development across teams.

Collaborating cross-functionally with Product, Art, Design, QA, Platform Engineering, and Publishing to ensure seamless delivery throughout the game life cycle.

Aligning technical strategy, priorities, and execution approaches with executive stakeholders.

Allocating resources and planning sprints across Unity teams to optimize delivery and manage priorities effectively.

Ensuring code quality through robust testing procedures, code reviews, and continual enhancement of engineering standards.

Cultivating a culture of high performance, accountability, and collaboration within a globally distributed engineering team.

Requirements: Your Background

Ideal qualifications include:

Over 12 years of experience managing development teams involving Unity Engineering while collaborating with cross-functional units like Product, Technical Art, Design, and QA.

Proven track record as a director or senior leader in engineering within the mobile gaming sector.

Proficiency in leading and scaling Unity engineering teams in a distributed global environment.

Strong technical acumen in Unity and client-side game development.

Hands-on involvement with live service games, focusing on performance optimization and content updating pipelines.

Demonstrable success in enhancing engineering workflows, team efficiency, and delivery speed.

Experience setting up and maintaining engineering best practices, encompassing code quality and KPI tracking.

Familiarity with working across multiple time zones and managing globally distributed teams.

Effective collaboration skills, adept at working harmoniously with Product, Art, Design, QA, and Platform teams.

Sound knowledge of agile development practices and iterative, hypothesis-driven development.

Exceptional communication and leadership skills with a focus on clarity, accountability, and team development.

Compensation:

The base salary range for this position is $250,000- $350,000 annually based on experience, skills, and relevant factors.

What You'll Receive in Return:

Generous paid time off

Premier health benefits applicable in each country of residence

Paid life insurance

Health & wellness allowance

Cell phone allowance

Identity theft/credit monitoring service paid for by the company

Our client, an innovative tech company that is transforming family entertainment with interactive, movement-based experiences, is in need of a Software Engineer to improve developer workflows and empower software teams in developing cutting-edge games.

They are looking for a skilled Unity Game Engineer to join their dynamic game development team in creating presentation layers within the Unity engine. The candidate will play a key role in designing the UI layer for a global game library in Unity, focusing on scalable systems that deliver intuitive user interfaces, seamless user experiences, and optimal performance across various game titles.

Responsibilities:

Lead the development of foundational UI frameworks utilized in multiple game titles.

Implement high-quality Unity C# code based on UI/UX designs.

Create shared UI component libraries to ensure consistency and reusability.

Design and optimize localization systems to support multilingual releases.

Develop custom Unity editor tools and workflows for designers and developers.

Improve UI performance metrics on target platforms such as draw calls, memory usage, and responsiveness.

Engage in code reviews and collaborate on technical planning across different teams.

Requirements:

Minimum of 3 years of professional software development experience.

Proficient in C# and Unity, with a focus on UI concepts like uGUI or UI Toolkit.

Strong grasp of asset pipelines, asynchronous programming patterns, and performance enhancement techniques within Unity.

Experience implementing scalable UI architectures such as MVVM/MVC/MVP.

Familiarity with localization strategies and tools.

Our client operates as a top innovator in body motion video games on their proprietary gaming device. They are currently in search of a capable ML Engineer to join their adept engineering team. The team focuses on cutting-edge technology blending research with practical applications, particularly in developing indoor motion tracking technology using readily available consumer hardware.

The ideal candidate will be pivotal in supporting researchers and scientists through designing and constructing critical infrastructure. This infrastructure enhances ML workflows and the speed of model iteration, aiding in the acceleration of research endeavors.

Responsibilities include:

Designing and implementing training pipelines, automated data workflows, and integration tools that can meet the increasing demands of research.

Establishing robust systems for large-scale data collection, preprocessing, and curation to fortify experimentation processes.

Developing tools that streamline experiment cycles, reduce time-to-completion, and facilitate model transition to production.

Close collaboration with ML researchers to tackle technical challenges, enhancing the overall developer experience.

Supporting model deployment processes and seamlessly integrating ML aspects with broader platform systems.

Requirements:

Minimum of 3 years of experience in constructing high-quality machine learning systems, data infrastructure, or research platforms.

Proficiency in Python along with expertise in at least one systems programming language (e.g., C++, Go, Rust, Java).

Demonstrated experience in working with PyTorch or TensorFlow within production or research environments.

Strong track record in designing ML training pipelines, data workflows, and integration tools.

Understanding of model deployment and optimization for inference (MLOps practices).

Preferred Skills:

Knowledge in GPU-accelerated computing, distributed training systems, and data versioning or experiment tracking tools.

Exposure to Docker and Kubernetes platforms.

Contributions made to open-source ML projects.

Feel free to reach out if you have any questions or need further clarification on the role.