WinLab

We’re looking for a strong back-end engineer with a passion for probability, discrete-event

systems and casino math. You’ll own the server-side logic for brand-new video-slot titles

featuring custom mechanics and switchable volatility profiles (medium / high). Working

alongside game designers and front-end teams, you’ll transform design docs into fully

simulated, production-ready slot engines, complete with optimisation pipelines and S3

deployment.

What you’ll do

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Design and implement novel slot mechanics (e.g., 8×8/dynamic boards, unique win

conditions, dual reel sets for volatility switching, split/ways/transition mechanics, etc ).

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Extend a Python-based math framework: build config files, reel-strip loaders, payout

tables, win evaluators, cascading/tumbling logic, free-spin rounds and wallet managers.

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Emit well-structured JSON events for the client SDK (spins, wins, multipliers, feature

triggers, volatility toggles, etc.).

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Create simulation runs (millions of rounds) to verify RTP, hit-rates, max-win distribution

and other KPIs.

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Tune win distributions with a companion optimisation tool (Rust binary) and produce

balanced lookup tables.

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Package output assets (books, lookup tables, configs) and automate uploads to AWS

S3.

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Collaborate with front-end and QA to validate event schemas and gameplay flow.

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Write clear docs and contribute sample games to our internal knowledge base.

Must-have experience

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3 + years professional Python (async/multithreading, typing, testing).

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Strong applied probability / statistics; comfortable deriving RTP, volatility, hit-rate,

max-exposure.

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Previous work on slot, RNG or other real-money game logic.

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Deep understanding of state machines, event-driven architecture and JSON

serialization.

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Competence with Pandas / NumPy for simulation analysis and Matplotlib (or similar) for

visual checks.

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Experience generating and processing large simulation datasets (GB-scale).

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Version control (Git) and CI basics; able to ship production code that passes review.

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Fluent English; able to translate game-design language into deterministic algorithms.

Nice to have

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Exposure to high-performance algorithms.

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AWS SDK (boto3) and S3 workflows; knowledge of object hashing / SHA verification.

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Familiarity with lookup-table–based game balancing.

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Experience with Zstandard or similar fast compression formats.

Role Summary: The 2D VFX Animator will be instrumental in conceptualizing and executing advanced visual effects that not only embellish but fundamentally enhance the player's experience with our slot games. Collaborating closely with a cross-disciplinary team, the role demands a blend of creative flair and technical prowess, ensuring that all VFX assets are optimized and aligned with the overarching game theme and mechanics. 

     Core Responsibilities: 

• Design, develop, and deliver sophisticated 2D visual effects tailored for slot game applications, utilizing industry-standard software and methodologies. 
• Engage in rigorous R&D to conceptualize VFX that complement game narratives, mechanics, and UI/UX design principles.
• Perform technical optimizations of VFX assets to ensure seamless performance across diverse hardware platforms. 
• Integrate visual effects within game engines, adhering to best practices in asset implementation and version control workflows. 
• Conduct iterative refinements based on team feedback and user testing data, employing a data-driven approach to VFX adjustments. 
• Maintain abreast of emerging trends and technologies in game development and visual effects, with a focus on applications within the slot gaming sector. 
• Contribute to all phases of the game development lifecycle, offering technical expertise and creative insights to enhance game quality and player engagement. 
  
  Qualifications: 
• Demonstrable expertise in 2D VFX animation, specifically within the slot game domain, evidenced by a comprehensive portfolio. 
• Mastery of VFX creation tools such as Adobe After Effects, Photoshop, and Spine, with an emphasis on efficiency and quality in asset production. 
• Prior experience in a game development studio environment, with a deep understanding of the game production cycle, particularly in the context of slot games. 
• Strong foundation in animation principles, graphic design, and digital art, coupled with a capacity for creative problem-solving. 
• Proficient in game engine technologies and VFX integration techniques, with familiarity in scripting and automation processes beneficial. 
• Exceptional communication skills, both verbal and written, facilitating effective collaboration in a multidisciplinary team setting.

We’re looking for a Motion Design Lead who not only creates stunning videos but also knows how to lead, inspire, and grow a creative team. You’ll drive the motion design direction, set standards for quality, and help shape how millions of users experience our brand. No bureaucracy here — just ownership, bold ideas, and direct product impact.
 

🔥 What You’ll Get:

• Leadership role — manage and mentor a team of motion designers, setting creative and technical direction.
• Active influence on product development — your vision will shape brand perception for millions of users.
• Cutting-edge AI tools — we’re already automating creative processes, and you’ll lead this transformation.
• Creative freedom — we support experiments and bold hypotheses backed by data.
• Cross-functional collaboration — work closely with marketing, product, and data teams to achieve measurable results.
   

📌 What You’ll Do:

• Lead and mentor the motion design team, ensuring continuous professional growth.
• Oversee the full creative cycle: from brainstorming and concepting to polished video delivery.
• Develop video creatives for Meta (Facebook, Instagram), YouTube, and other platforms.
• Ensure consistency in storytelling, design quality, and brand guidelines across the team’s output.
• Collaborate with marketing on briefs, iterate based on performance data, and push creative boundaries.
• Optimize creatives according to KPIs (CTR, CPA, Hook Rate).
• Implement AI tools, templates, and workflow automation to improve efficiency.
• Track trends, analyze competitors, and introduce innovative approaches.
   

✅ We’re Looking for Someone Who:

• Has 4+ years of experience in motion design or video production, including at least 2 years in a leadership/management role.
• Can showcase a portfolio of high-performing advertising creatives, especially for Meta platforms.
• Is confident in After Effects, Premiere Pro, Figma, and understands the full creative production pipeline.
• Has solid expertise in editing, sound design, subtitles, and 2D animation.
• Experienced with AI tools and automation (strong advantage).
• Possesses strong design fundamentals: composition, typography, color, timing.
• Has English proficiency B1+ (for research, content work, and team communication).
• Is proactive, organized, and able to balance creativity with team management.
   

💡 If you want to lead a talented team, set the creative bar, and deliver videos that truly perform — we’d love to hear from you.

Junior Legal Assistant (Warsaw)

An international marketing company with an office in Warsaw is looking for a Junior Legal Assistant to join our team. We operate across the markets of Europe, Latin America, and Asia, developing projects in digital, iGaming, and performance marketing.
 

Key Responsibilities:

• Drafting and adapting contracts (service, agency, NDA, IP-assignment/license, consulting/contractor, GDPR addenda, etc.)
• Reviewing contracts and preparing concise risk memos
• Preparing official letters, requests, and corporate documentation
• Researching legislation in different jurisdictions (labor, tax, corporate law)
• Preparing employment/contractor agreements, powers of attorney (PoA), internal policies
• Coordinating translations, notarizations, and apostille
   

Requirements:

• 1–2 years of experience or currently studying in the final years of law school
• Knowledge of civil, labor, and corporate law
• English — B2 level or higher
• Attention to detail, responsibility, and readiness to work in the Warsaw office (hybrid format possible)
   

Will be an advantage:

• Experience in international companies or in the digital/IT field
• Knowledge of GDPR and European legislation
• Polish language (from B1 level)
   

We offer:

• Work in an international company and participation in diverse projects
• Career growth opportunities — from assistant to independent legal counsel
• Training and support from experienced specialists
• Competitive compensation

Design Team Lead (Production)
We’re looking for a Design Team Lead who can combine hands-on creativity with leadership. 
Your role will be to organize and scale the production of design assets, build smooth processes, mentor the team, and deliver high-quality creatives that perform in a fast-paced environment. 

🔥 What You’ll Get:
- Leadership role - the opportunity to build and lead a design production team. 
- Impact - your management will directly influence the efficiency and output of creative production. 

- Processes & automation -  freedom to improve workflows, implement tools (including AI), and optimize production speed. 

- Collaboration - work closely with producers, analysts, and other teams to deliver effective results. 

📌 What You’ll Do: 
- Lead and manage the design production team (motion & static). 
- Set priorities, delegate tasks, and ensure timely delivery of creatives. - Build and optimize production pipelines to handle a high volume of assets. 
- Provide feedback, run reviews, and support the professional growth of designers. 
- Ensure high quality and consistency of deliverables across platforms and formats. 
- Collaborate with producers and stakeholders on briefs, planning, and performance analysis. 
- Create key creatives yourself - especially for complex or high-priority projects. 
- Research trends, tools, and approaches to keep the team at the cutting edge. 

✅ We’re Looking for Someone Who: 
- Has 3+ years of experience in design or motion production, ideally in digital advertising. 
- Has at least 1–2 years of team leadership experience (mentoring, managing processes, delegating). 
- Can show a portfolio of high-quality creatives across different formats. 

- Is confident in design and motion tools (After Effects, Photoshop, Illustrator, Figma, etc.). 

- Understands workflows of high-volume creative production and how to scale them. 

- Has experience with automation/AI tools (a big plus). 

- Has strong communication, organizational, and leadership skills.
- English B2 for communication, research, and collaboration.

🎮 Senior Game Developer (PixiJS / Slot Games)

Location: Remote

Type: Full-time

We're looking for a Senior Game Developer with strong expertise in PixiJS to help us craft visually stunning and technically polished slot games. You’ll play a key role in bridging development and animation, shaping every detail of the player’s experience.

🧩 What You’ll Do:

Develop HTML5 slot games from scratch using JavaScript/TypeScript and PixiJS.

Create and integrate custom visual effects and animations in close collaboration with artists and animators.

Optimize game performance to ensure smooth gameplay across various platforms and devices.

Contribute to architectural decisions and code reviews.

Mentor junior developers and support their professional growth.

🛠 What We’re Looking For:

5+ years of experience in HTML5 game development, ideally in slot games.

Strong hands-on expertise with PixiJS, including scene creation, object animation, layering, masking, and filters.

Solid knowledge of JavaScript/TypeScript, HTML5, and CSS3.

Understanding of rendering loops and performance optimization techniques.

Proven experience working closely with 2D artists and animators.

A strong portfolio showcasing completed projects — especially slot games and custom visual effects (required).

✨ Nice to Have:

Experience with Spine or DragonBones.

Familiarity with game engines or frameworks like Phaser.

Skills in mobile optimization and asset management.

2D Artist (Online Slot Games)

We are looking for a highly skilled 2D Artist to create top-tier visual assets for premium online slot games. This role requires exceptional artistic ability, a deep understanding of slot game aesthetics, and close collaboration with animators, game designers, and developers to ensure cohesive, visually stunning results.

Responsibilities

- Design and produce high-quality 2D game assets, including symbols, backgrounds, UI elements, and promotional graphics.

- Work closely with animators to prepare layered, animation-ready artwork and ensure smooth visual integration.

- Collaborate with game designers to maintain thematic consistency and support gameplay clarity.

- Create visual concepts, mood boards, and style guides for each project.

- Optimize assets for various resolutions and performance requirements without compromising quality.

- Review and refine artwork to meet brand, technical, and regulatory requirements for different markets.

Requirements

-Proven portfolio of high-quality 2D game art, ideally for online slots or casino games.

-Mastery of Photoshop, Illustrator, and other industry-standard 2D tools.

-Strong understanding of composition, color theory, typography, and visual hierarchy.

-Ability to design for animation, including asset separation, layering, and parallax planning.

-Experience working in a collaborative, multidisciplinary team.

-Attention to detail and commitment to delivering top-quality visuals under deadlines.

Nice to Have

-Experience with Spine, After Effects, or similar animation tools.

-Familiarity with game development pipelines and version control.

-Knowledge of cultural and jurisdictional differences in visual design for casino products.

What you’ll doк

Design, simulate, and balance slot mathematics that delight players, meet regulatory standards,

and achieve commercially proven KPIs.

Responsibilities

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Devise complete mathematical models for video slots: pay-tables, feature probabilities,

RTP, volatility profiles, jackpots, and max exposure limits.

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Build large-scale simulations (100 M+ spins) in Python to validate models, stress-test

edge cases, and generate compliance reports for labs (GLI, iTech Labs, etc.).

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Collaborate with the team to align maths with theme, core loop, and business goals;

adjust parameters to hit target GGR, hit frequency, and retention curves.

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Perform competitive teardown of market-leading titles, extract insights on why they

succeed, and translate findings into new concepts or balance tweaks.

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Analyse live performance data, compare against forecasted curves, and recommend

tunings that optimise both player experience and operator revenue.

Requirements

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2+ years in slot mathematics or equivalent quantitative role within released real-money

or F2P slots.

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Hands-on participation in at least two commercially successful slot projects (e.g.,

top-ranked on SlotCatalog or GGR > $1 M in the first 90 days).

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Strong command of probability theory, combinatorics, and statistical inference; ability to

explain complex math to non-technical stakeholders.

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Proficiency with Python (NumPy, pandas, SciPy or similar) for simulations and data

analysis.

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Working knowledge of regulatory requirements (MGA, UKGC, etc.) and

responsible-gaming constraints.

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English B2+ for documentation and cross-team communication.

Nice to have

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Experience building automated dashboards (SQL + BI tools) that track live KPI drift

against model baselines.

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Familiarity with progressive jackpots, crash mechanics, or innovative reel formats (e.g.,

Megaways, Infinity Reels).

Engagement model

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Part-time or contract format is acceptable, provided availability aligns with milestone

reviews and critical simulation passes.