Gameplay & UI Developer - Paper.io2

📍 Job Overview

Job Title: Gameplay & UI Developer - Paper.io 2

Company: Voodoo

Location: Barcelona, Catalonia, Spain (Fully Remote within CET +/-2h)

Job Type: Full-time

Category: Game Development (Gameplay & UI Specialization)

Date Posted: September 08, 2026

Experience Level: Mid-Senior to Senior (5+ years)

Remote Status: Fully Remote (with specific time zone requirements)

🚀 Role Summary

• Core Gameplay Enhancement: Drive the evolution of core gameplay mechanics for Paper.io 2, ensuring a fun, engaging, and competitive player experience.

• UI/UX Development & Polish: Spearhead the development of intuitive, visually appealing, and highly polished user interfaces, animations, and overall player experience.

• Meta-Feature Innovation: Design and implement new meta-game features that increase player retention, monetization, and long-term engagement for a globally popular mobile game.

• System Refinement & Optimization: Continuously improve and refine existing game systems, with a strong emphasis on performance optimization and efficient resource utilization.

📝 Enhancement Note: While the job title is "Gameplay & UI Developer," the responsibilities clearly indicate a senior role focused on both innovative feature development and deep technical expertise in UI/UX and core mechanics. The "Senior" designation is inferred from the 5+ years of experience requirement and the expectation of contributing to "important decisions" and "entrepreneurial ventures." The remote work flexibility is significant, but the CET +/-2h constraint is crucial for candidates to consider.

📈 Primary Responsibilities

• Develop and implement client-facing features, with a primary focus on UI elements, animations, and overall game polish.

• Contribute to core gameplay improvements, ensuring the game remains dynamic, challenging, and enjoyable for millions of players.

• Design, develop, and integrate new meta-game features that enhance player progression, monetization, and long-term engagement strategies.

• Enhance and refine existing game systems, including performance optimization, memory management, and efficient code architecture.

• Collaborate closely with a multidisciplinary team of passionate game developers, artists, and product managers to bring innovative game ideas to life.

• Oversee the testing phase for new features and systems, and iterate based on player feedback and data analysis to ensure optimal quality and player satisfaction.

• Contribute to crucial game design decisions, leveraging expertise to shape the future direction of Paper.io 2.

📝 Enhancement Note: The responsibilities are structured to reflect a senior developer's scope, encompassing not just implementation but also design input, system refinement, and collaboration on strategic decisions. The emphasis on "client-facing features," "UI, Animations & polish," and "core gameplay improvements" aligns perfectly with the job title's specialization.

🎓 Skills & Qualifications

Education:

• While no specific degree is mandated, a Bachelor's degree in Computer Science, Game Development, or a related field is often preferred for roles requiring deep technical understanding. Equivalent practical experience will also be strongly considered. Experience:

• Minimum of 5 years of professional experience in game development, with a significant focus on mobile platforms.

• Proven track record of successfully developing and launching mobile games, particularly in the casual, hybrid-casual, or mid-core genres. Required Skills:

• C# Proficiency: Expert-level command of C# for game development within the Unity engine.

• Unity Engine Expertise: Deep understanding and practical experience with Unity's core features, workflows, and best practices for mobile development.

• Mobile Game Development: Demonstrated experience in developing games for iOS and Android platforms, understanding their unique constraints and opportunities.

• UI/UX Development: Strong skills in creating user-friendly, responsive, and visually appealing user interfaces and in-game menus.

• Animation Systems: Experience implementing and optimizing in-game animations, UI animations, and potentially visual effects.

• Problem-Solving: Exceptional analytical and problem-solving abilities, with a keen eye for identifying and resolving complex technical challenges.

• Performance Optimization: Proven ability to diagnose and resolve performance bottlenecks, optimize memory usage, and ensure smooth gameplay across a range of devices.

• English Fluency: Excellent written and verbal communication skills in English for effective team collaboration and documentation.

Preferred Skills:

• Specialized Area Expertise: Exceptional expertise in at least one of the following:

  • Animation Systems (complex character or UI animations)
  • Particle Systems (visual effects, particle emitters)
  • Shaders (custom shader development for specific visual effects)
  • Game Architecture (designing scalable, maintainable game systems)
  • Performance Optimization (deep dive into profiling and optimization techniques)
  • Networking (real-time multiplayer or asynchronous game communication)

• Game Design Acumen: A creative mindset with an understanding of game design principles, player psychology, and engagement loops.

• Cross-functional Collaboration: Experience working effectively within agile development teams, collaborating with artists, designers, and product managers.

📝 Enhancement Note: The emphasis on "proven track record in successful mobile game development" and the "exceptional expertise in a specialized area" strongly suggests that candidates with demonstrated contributions to popular mobile titles will be highly favored. The preference for specific technical areas highlights opportunities for candidates to differentiate themselves.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrable UI/UX Projects: Showcase examples of polished and functional user interfaces developed for mobile games, highlighting navigation flow, visual design, and responsiveness.

• Gameplay Feature Implementations: Present case studies of core gameplay mechanics or innovative meta-features you have designed and implemented, detailing the problem solved and the technical approach.

• Performance Optimization Examples: Provide concrete examples of performance improvements you have achieved, detailing the metrics before and after optimization (e.g., frame rate, memory usage, load times).

• System Architecture Designs: If applicable, include examples of game systems you've architected, demonstrating scalability, maintainability, and adherence to best practices.

Process Documentation:

• Workflow Design & Optimization: Be prepared to discuss your process for designing new features, from initial concept to implementation, and how you incorporate optimization at each stage.

• System Implementation & Automation: Detail your approach to implementing complex game systems and any use of scripting or automation to streamline development or testing processes.

• Measurement & Performance Analysis: Explain how you measure the success of features and systems, and how you use data (player feedback, analytics) to drive refinements and improvements.

📝 Enhancement Note: For a role of this nature, a portfolio is critical. The requirements emphasize tangible proof of skill in UI/UX, gameplay implementation, and performance optimization. Candidates should be ready to articulate their development process and demonstrate impact through metrics.

💵 Compensation & Benefits

Salary Range:

• Based on the "5+ years of professional experience" requirement, "best-in-class compensation," and the company's status as a leading mobile publisher, a competitive salary range for a Senior Gameplay & UI Developer in Barcelona, Spain (or comparable European locations for remote work) would typically fall between €60,000 - €90,000 annually. This estimate considers the cost of living in Barcelona and prevailing market rates for senior game development roles in Western Europe. Benefits:

• Best-in-class Compensation: This implies a highly competitive salary and potentially performance-based bonuses.

• Country-Specific Benefits: Voodoo offers benefits tailored to the country of residence, which may include:

  • Comprehensive health insurance (medical, dental, vision)
  • Retirement savings plans or equivalent
  • Paid time off (vacation, sick leave, public holidays)
  • Professional development opportunities (training, conferences)
  • Potential for stock options or equity, depending on seniority and location.

• Remote Work Support: Given the fully remote nature, expect support for home office setup or stipends.

Working Hours:

• Standard full-time hours, estimated at 40 hours per week.

• Flexibility is implied due to the remote work arrangement, but adherence to CET +/-2h is required for effective team collaboration.

📝 Enhancement Note: The salary estimate is based on industry benchmarks for senior game developers in major European tech hubs, adjusted for the specified region and the "best-in-class" compensation claim. The country-specific benefits are a crucial detail for candidates to investigate based on their location.

🎯 Team & Company Context

🏢 Company Culture

Industry: Mobile Gaming & App Publishing. Voodoo is a dominant player in the hyper-casual and hybrid-casual mobile game market, known for its rapid growth, data-driven approach, and global reach.

Company Size: Approximately 800 employees globally. This size indicates a company that is large enough to have significant resources and impact but still retains agility and a potentially less bureaucratic structure than massive corporations.

Founded: 2013. This provides a history of sustained growth and adaptation within the fast-evolving mobile gaming landscape.

Team Structure:

• The role is within the "Live Games" team, specifically supporting the Paper.io 2 studio. This team focuses on enhancing existing, successful games.

• The Paper.io 2 team is described as "small" and composed of "excellent people," implying a highly skilled, efficient, and potentially autonomous unit.

• Reporting is likely to a Lead Game Developer, Technical Director, or Studio Head within the Paper.io 2 team, with cross-functional collaboration across design, art, QA, and product management. Methodology:

• Voodoo emphasizes a data-driven approach to game development and live operations, leveraging analytics to inform decisions and drive improvements.

• Agile methodologies are likely employed, facilitating iterative development, rapid prototyping, and continuous feedback integration.

• A strong focus on quality and player experience is evident in their pursuit of "iconic games" and high standards.

Company Website: https://voodoo.io/

📝 Enhancement Note: Voodoo's success in mobile publishing suggests a culture that values innovation, rapid execution, and data-informed decision-making. The "small team" environment for Paper.io 2 implies a high degree of autonomy and direct impact for team members.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Senior Gameplay & UI Developer. It requires significant professional experience and the ability to contribute to high-level game design decisions and technical architecture. The scope includes not just implementation but also innovation and refinement of core game systems.

Reporting Structure: The developer will report to a lead within the Paper.io 2 live studio team. This team works on a globally renowned game, suggesting interaction with experienced industry professionals and potentially studio leadership.

Operations Impact: The role offers substantial impact by directly contributing to the development and enhancement of Paper.io 2, a game with hundreds of millions of active users. Decisions made by this developer will influence the gameplay experience for a massive global audience, directly affecting player retention, engagement, and revenue.

Growth Opportunities:

• Technical Specialization: Deepen expertise in areas like advanced animation, shader development, performance optimization, or game architecture, becoming a go-to specialist.

• Leadership Track: Progress into Lead Developer or Technical Director roles within a studio, managing technical teams and overseeing project architecture.

• Cross-Studio Mobility: With Voodoo's portfolio of games and studios, opportunities may exist to contribute to other titles or explore different game genres.

• Entrepreneurial Ventures: Voodoo supports internal studio creation and new game development; this role could be a stepping stone to contributing to or leading new game projects.

• Mentorship: As a senior member, there will be opportunities to mentor junior developers and share knowledge.

📝 Enhancement Note: The growth path here is strong, moving beyond just coding to architectural influence, leadership, and even new venture creation within a successful publishing house. The "entrepreneurial ventures" aspect is a key differentiator for Voodoo.

🌐 Work Environment

Office Type: Fully Remote. This allows for flexibility in location, provided candidates are within the specified CET +/-2h time zone range.

Office Location(s): While the primary job posting is for Barcelona, Spain, the company explicitly lists numerous countries where remote work is permitted (Spain, Poland, Estonia, Ukraine, Malta, Finland, Sweden, Turkey, Portugal, Germany, Georgia, Netherlands, Italy, Romania, United Kingdom). This indicates a global, distributed team structure.

Workspace Context:

• The remote setup necessitates self-discipline and effective time management.

• Collaboration will primarily occur through digital tools (e.g., Slack, Discord, project management software, video conferencing).

• Access to robust development tools and potentially cloud-based collaborative environments will be provided.

• The "small team" dynamic suggests a close-knit, highly collaborative virtual environment where direct communication and shared ownership are valued. Work Schedule:

• Standard full-time hours (approx. 40 hours/week).

• Flexibility in daily start/end times is likely, but synchronous collaboration during core business hours (CET +/-2h) is essential for team meetings, code reviews, and real-time problem-solving.

📝 Enhancement Note: The extensive list of remote-eligible countries highlights Voodoo's commitment to a global talent pool, but the time zone constraint is a critical filter for applicants. Candidates must be comfortable with a fully digital, asynchronous-first communication style, punctuated by synchronous meetings.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will review your application and resume, focusing on relevant experience and skills.

• Technical Interview(s): Expect one or more technical interviews focusing on C#, Unity, game development principles, and problem-solving. This may involve live coding challenges or in-depth discussions of past projects.

• Portfolio Review Session: A dedicated session where you present your portfolio, detailing specific projects, your contributions, technical challenges, and outcomes. This is a critical stage for demonstrating your skills.

• Gameplay/UI Challenge: Potentially a take-home assignment or a live exercise to assess your approach to specific gameplay or UI development tasks relevant to Paper.io 2.

• Team/Culture Fit Interview: A discussion with potential team members or studio leads to assess your fit with the team's collaborative style and Voodoo's company culture.

• Final Interview: May involve a discussion with senior leadership to confirm fit and discuss overall contribution.

Portfolio Review Tips:

• Curate Selectively: Focus on 2-4 of your strongest projects that best showcase your UI/UX, gameplay development, and optimization skills relevant to Paper.io 2.

• Structure Your Narrative: For each project, clearly outline: the problem statement, your specific role and contributions, the technical challenges faced, the solutions implemented, and the measurable impact (e.g., performance improvements, player feedback, engagement metrics).

• Show, Don't Just Tell: Use video demonstrations, interactive builds, or detailed screenshots to visually convey your work. For UI/UX, show the user flow and responsiveness. For gameplay, demonstrate mechanics in action.

• Highlight Optimization: Explicitly detail performance improvements, frame rate gains, memory reduction, or load time decreases achieved through your efforts. Quantify these wherever possible.

• Be Ready for Deep Dives: Anticipate detailed questions about your code, architectural decisions, and problem-solving strategies.

Challenge Preparation:

• Understand Paper.io 2: Play the game extensively. Analyze its core mechanics, UI, meta-features, and areas for potential improvement.

• Practice C# & Unity: Refresh your knowledge of C# syntax, Unity APIs, and common mobile development patterns.

• Simulate Live Coding: Practice coding common game development tasks under time constraints.

• Prepare for System Design: Think about how you would approach designing new features or optimizing existing systems for a game like Paper.io 2.

📝 Enhancement Note: The interview process is rigorous, with a strong emphasis on practical application and demonstrable results through a portfolio. Candidates must be prepared to articulate their technical process and impact clearly and concisely.

🛠 Tools & Technology Stack

Primary Tools:

• Unity Engine: The core development environment for Paper.io 2. Proficiency in recent versions and their specific features is essential.

• C#: The primary programming language used within Unity.

• Version Control: Git (likely with platforms like GitHub, GitLab, or Bitbucket) for collaborative development and code management.

Analytics & Reporting:

• In-house Analytics Tools: Voodoo likely uses proprietary analytics systems to track player behavior, game performance, and monetization metrics. Familiarity with general analytics concepts is key.

• Third-party Analytics SDKs: Experience integrating and utilizing SDKs from providers like Firebase Analytics, GameAnalytics, or similar platforms for mobile game tracking.

• Data Visualization Tools: While specific tools aren't mentioned, experience with tools for interpreting data (e.g., Excel, Google Sheets, BI platforms) is beneficial.

CRM & Automation:

• Not directly applicable to game development, but understanding how CRM data might inform game design or player segmentation could be a plus.

• Build Automation: Experience with CI/CD pipelines for mobile game development (e.g., Jenkins, Unity Cloud Build, Fastlane) would be advantageous for streamlining the build and deployment process.

• Project Management Tools: Familiarity with tools like Jira, Asana, Trello, or Ashby for task tracking and workflow management.

📝 Enhancement Note: The technology stack is heavily centered around Unity and C#. A candidate's ability to leverage these tools efficiently, coupled with a strong understanding of mobile development best practices and analytics, will be paramount.

👥 Team Culture & Values

Operations Values:

• Passion for Quality: A deep commitment to creating high-quality, polished, and fun gaming experiences that players will remember.

• Data-Driven Decision Making: Utilizing analytics and player feedback to inform design choices, prioritize features, and optimize game performance.

• Innovation & Creativity: Encouraging new ideas for gameplay mechanics, meta-features, and UI/UX solutions.

• Collaboration & Teamwork: Working effectively in a multidisciplinary team, sharing knowledge, and supporting colleagues to achieve common goals.

• Efficiency & Optimization: A drive to create performant, well-architected systems and to continuously refine processes for better outcomes.

• Entrepreneurial Spirit: A proactive, results-oriented mindset, contributing to the growth and success of Voodoo's games.

Collaboration Style:

• Agile & Iterative: Teams likely work in sprints, with regular check-ins, feedback loops, and iterative development cycles.

• Cross-functional Integration: Developers work closely with designers, artists, QA testers, and product managers, fostering a holistic approach to game development.

• Open Communication: Encouraging open dialogue, constructive feedback, and knowledge sharing through digital channels and meetings.

• Remote Collaboration Tools: Proficiency with collaborative tools is essential for seamless interaction within a distributed team.

📝 Enhancement Note: Voodoo's culture appears to foster a blend of creative passion and rigorous, data-informed execution, all within a collaborative and increasingly remote environment. The emphasis on "excellent people" and "high standards" suggests a team that values expertise and dedication.

⚡ Challenges & Growth Opportunities

Challenges:

• Maintaining Peak Performance: Ensuring Paper.io 2 runs smoothly on a vast array of mobile devices, requiring constant optimization efforts.

• Balancing Innovation with Stability: Introducing new features and meta-game elements without disrupting the existing, successful core gameplay loop or introducing bugs.

• Global Player Base Needs: Catering to the diverse preferences and feedback from a massive, international player base.

• Remote Collaboration Dynamics: Effectively collaborating and communicating within a distributed team, bridging time zone differences and maintaining strong team cohesion.

• Evolving Mobile Landscape: Keeping pace with the rapid changes in mobile technology, player expectations, and market trends.

Learning & Development Opportunities:

• Advanced Unity & C# Skills: Opportunities to master cutting-edge Unity features, performance profiling tools, and advanced C# programming patterns.

• Specialized Technical Skills: Deep dive into areas like advanced shaders, complex animation systems, networking protocols, or game architecture design.

• Game Design Principles: Gain deeper insights into player psychology, monetization strategies, and live-ops management through collaboration with experienced game designers and product managers.

• Cross-Disciplinary Exposure: Learn about aspects of game development beyond your specialization, such as art pipelines, backend systems, or marketing analytics.

• Mentorship: Receive guidance from senior developers and potentially lead developers, fostering career progression.

📝 Enhancement Note: The role presents significant technical challenges inherent in live mobile game operations, but these are framed as opportunities for growth and skill development within a supportive, expert team.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex UI system you've built for a mobile game. What were the key design considerations, and how did you ensure it was performant and intuitive?" (Focus on your process, technical choices, and user-centric design.)

• "Walk me through a core gameplay mechanic you improved or developed. What was the original problem or goal, what was your solution, and what was the impact on player engagement or retention?" (Highlight your problem-solving, design thinking, and impact measurement.)

• "How do you approach performance optimization in Unity for mobile games? Can you provide an example of a challenging optimization problem you solved?" (Detail your debugging process, profiling tools, and specific optimization techniques used.)

• "Given the success of Paper.io 2, what new meta-feature would you propose to increase long-term player engagement, and why?" (Showcase your understanding of the game, player psychology, and innovative thinking.) Company & Culture Questions:

• "What interests you about Voodoo and specifically the Paper.io 2 team?" (Research Voodoo's mission, recent successes, and the game itself. Connect your passion to their work.)

• "How do you handle constructive criticism or feedback on your code or designs from team members?" (Emphasize your openness to feedback and collaborative problem-solving.)

• "Describe your ideal remote work environment and how you maintain productivity and communication with a distributed team." (Highlight your self-discipline, communication tools, and proactive approach.) Portfolio Presentation Strategy:

• Storytelling is Key: Frame each project as a narrative – the challenge, your role, your solution, and the outcome.

• Quantify Everything Possible: Use numbers (e.g., "improved frame rate by 20%", "reduced memory usage by 15%", "increased UI interaction success rate by 10%") to demonstrate impact.

• Showcase Technical Prowess: Be prepared to discuss code structure, design patterns, and specific Unity/C# implementations.

• Visuals are Crucial: Use high-quality videos, GIFs, or interactive demos to bring your work to life. For UI, show the flow and responsiveness.

• Tailor to Paper.io 2: Whenever possible, draw parallels between your past work and the needs of Paper.io 2.

Challenge Preparation:

• Play the Game: Understand Paper.io 2's mechanics, UI, and player experience inside out.

• Practice Core Unity Tasks: Be ready to implement common game loops, UI elements, or simple mechanics in Unity.

• Focus on Optimization: If given a challenge, consider performance implications from the outset.

📝 Enhancement Note: The interview questions are designed to probe your technical depth, problem-solving skills, understanding of mobile game development, and ability to contribute meaningfully to a live, popular title. A strong portfolio presentation is non-negotiable.

📌 Application Steps

To apply for this Gameplay & UI Developer position:

• Submit your application through the provided Ashby link, ensuring your resume and any optional cover letter are tailored to highlight your C#, Unity, and mobile game development experience.

• Portfolio Preparation: Curate a digital portfolio (e.g., personal website, GitHub, dedicated portfolio platform) showcasing your strongest UI/UX, gameplay, and optimization projects. Ensure clear descriptions of your role, technical challenges, solutions, and quantifiable results.

• Resume Optimization: Emphasize achievements and responsibilities that align with the job description, using keywords such as "Unity," "C#," "Mobile Game Development," "UI/UX," "Performance Optimization," "Animation," and "Game Architecture."

• Company Research: Familiarize yourself with Voodoo's portfolio, particularly Paper.io 2. Understand their market position, recent game releases, and company values.

• Interview Practice: Prepare to discuss your portfolio in detail, practice answering technical questions related to Unity and C#, and be ready to articulate your approach to game design and optimization challenges.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.