Security Engineer (AAA Game)

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.

** About Us**

Immutable is a global technology company revolutionizing the gaming industry on Ethereum by providing a leading platform for game development. Incorporated in 2018, Immutable has swiftly achieved unicorn status in Australia, raising over AUD $300M+ with a valuation of AUD $3.5 billion.

The Immutable Group includes the Immutable Platform, known for successful games like RavenQuest and Immortal Rising 2, and Immutable Games, a key player in web3 game development with titles such as Gods Unchained and Guild of Guardians.

The goal is to make digital worlds a reality, with significant growth plans positioning Immutable as the fastest-growing gaming chain by 2024, with 250+ games signed.

About The Role

Immutable aims to support the successful launch of games utilizing cutting-edge monetization and growth tools. They are seeking a Principal Engineer to drive the future of player onboarding, discovery, and engagement. This role requires expertise at the confluence of product, data, and platform engineering.

The Principal Engineer will be pivotal in advancing the play.immutable.com platform, where players discover and engage with Web3 and Web2 games. Working closely with multiple teams, this role involves architecting systems, enhancing product velocity, and shaping a premier growth and game discovery platform. The position offers an opportunity to shape how games launch, grow, and retain players within the ecosystem through technical leadership.

Responsibilities

Design and optimize Immutable Play's technical foundation, encompassing onboarding systems, personalized game discovery, and smart matchmaking.

Collaborate with Product to drive the roadmap through data, user insights, and technical expertise to solve real challenges for studios and players.

Influence long-term technical strategies while accelerating short-term product development.

Drive the end-to-end delivery of core product features, prioritizing durability, scalability, and exceptional user experience.

Develop systems supporting player acquisition, activation, and retention for both Web2 and Web3 games.

Lead in experimentation frameworks, scoring systems, and targeting engines for rapid product-driven growth.

Establish engineering best practices to boost performance, reliability, and operational efficiency across the team.

Mentor engineers and enhance their skills through technical guidance, collaboration, and architectural coaching.

Serve as a facilitator, streamlining processes, simplifying complexities, and enabling agile decision-making.

Leverage product analytics, experimentation, and customer insights to refine features for optimal outcomes.

Work closely with Data Science to devise models, define telemetry, and evaluate effectiveness.

Translate intricate product requirements into clear actionable engineering decisions.

Collaborate with various teams to understand studio workflows and identify avenues to aid game launches and progression.

Communicate effectively to align engineering and product teams on trade-offs, risks, and strategies.

Requirements

Over 8 years of experience in building scalable consumer or SaaS platforms with a focus on full-stack or backend development.

Proficiency in technologies like TypeScript, React, Go, Node.js, AWS, or similar cloud-native stacks.

Demonstrated track record in developing resilient distributed systems, experimentation frameworks, and high-performance user-facing products.

A problem-solving mindset with the ability to link technical decisions to user outcomes.

Background in contributing to product discovery, shaping problem definitions, and driving product-driven experiments.

Excellent communication and collaboration capabilities, aligning teams towards common goals.

Strong mentoring experience, leading architecture conversations, and enhancing engineering standards within a team.

Disciplined in delivery, balancing prototyping, speed, and long-term quality.

Comfortable in a fast-paced startup or scale-up environment emphasizing pace, ownership, and autonomy.

Preferred Qualifications

Experience in growth engineering, experimentation platforms, or consumer discovery mechanisms.

Background in gaming, game technology, or player lifecycle systems.

Familiarity with Web3 technologies or digital asset ecosystems.

History in developing or integrating AI-driven features, recommendation systems, or personalization engines.

Benefits

At Immutable, employee well-being is paramount, offering a range of benefits to support global team members:

Competitive salaries, stock options, and insurance benefits for US employees.

Flexible working arrangements to cater to varied preferences.

Allowances for personal development courses and events.

Health and wellness support, including counseling services.

Parental leave policies, birthday leave, and additional annual leave days.

Commitment to diversity and inclusion in the workplace.

Immutable is devoted to fostering an inclusive work environment, appreciating all outlooks for continued success. Applicants can expect a response through the 2025 Circle Back Initiative.

Kindly note, recruitment agencies are not required to submit unsolicited resumes for this role. Thank you for understanding.

Embark on shaping the future of web3 gaming with us!

About Us

Immutable is a global technology company at the forefront of game development on Ethereum. Our mission is to redefine the gaming landscape by revolutionizing how games are experienced and discovered. Established in 2018, Immutable has quickly reached unicorn status, raising over AUD $300M+ with a valuation of AUD $3.5 billion.

Our company comprises the Immutable Platform, the primary platform for crafting games on Ethereum like RavenQuest and Immortal Rising 2, and Immutable Games, a pioneer in web3 game development and publishing showcasing games such as Gods Unchained and Guild of Guardians.

We are dedicated to materializing digital worlds and have ambitious growth plans, aiming to become the fastest-growing gaming chain in 2024 with 250+ games signed, surpassing all previous years combined.

About The Role

Immutable is in a rapid expansion phase within new markets, partners, and product lines. We seek a highly skilled Senior Business Development Manager for the Americas region to spearhead revenue growth in the United States, Canada, and Latin America. This role offers a unique opportunity to take charge of the most commercially significant gaming region globally and establish a multi-million dollar business from the ground up. As the lead, you will identify, pitch, and secure valuable partnerships with top game studios and publishers in the Americas for integration with Immutable's innovative products. You will have complete autonomy to drive the go-to-market strategy, experiment with winning approaches, and compete in a dynamic and competitive industry. This role is ideal for a self-driven individual who enjoys building from scratch, works independently, and thrives on experiencing the direct impact of their efforts.

Your Responsibilities Include:

Formulating and closing major commercial partnerships with prominent game studios and publishers across North America and LATAM

Developing and managing a robust pipeline of strategic opportunities, consistently exceeding revenue targets

Overseeing the end-to-end go-to-market strategy for the region, from market segmentation and outreach to negotiation and contract finalization

Representing Immutable at crucial industry events, establishing strong relationships with key decision-makers, and amplifying our market presence

Providing valuable insights and customer feedback to influence product, engineering, and marketing strategies

Executing disciplined deal cycles through accurate forecasting, CRM management, and seamless collaboration with cross-functional teams

Collaborating with senior leadership to expand strategies and identify new growth directions as the region scales

Preferred Qualifications:

5+ years of experience in enterprise business development or sales within gaming, tech, advertising platforms, or high-growth startups

Demonstrated success in managing complex deals with $1m+ total contract value

Proven experience in building pipelines from scratch with clear ownership of revenue outcomes

Autonomous mindset, driving results independently with strategic acumen and superior communication skills

Strong operational skills in CRM, revenue forecasting, and sales execution

Quick learner adaptable to new products, monetization models, and market segments

Energetic, competitive spirit aiming for meaningful contributions to the company's growth journey

Bonus Points For:

Deep connections with major game studios in the Americas

Experience in promoting growth, monetization, or infrastructure platforms in the gaming industry

Prior exposure to web3, digital assets, or game advertising markets

Additional Information

At Immutable, we embrace diversity and inclusion as fundamental to our workplace culture, recognizing the significant impact of diverse perspectives on our success. We ensure fair consideration of all applicants as part of our commitment to inclusivity.

Note to Recruitment Agencies:

This position is exclusively managed by our internal team. We request no unsolicited agency resumes, and we do not assume any responsibility for fees related to unsolicited resumes. Thank you for your understanding.

Join us in shaping the future of web3 gaming!