Head of Custody Security

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
 

Description
We are offering an opportunity to join our team and learn about cross-market trading strategies, focusing on identifying price differences of assets across multiple platforms. This role provides hands-on experience in financial technology, data analysis, and trading support.
As part of this position, you will:
Gain practical knowledge of market analysis and trading workflows
Learn how to recognize and evaluate opportunities across different platforms
Develop your skills in risk management and decision-making
Work with a mentor who will guide you step by step through the learning process
What we provide:
Comprehensive training program designed for beginners
Ongoing mentorship and professional support
Flexible schedule (approx. 1 hour a day required for study and practice)
Remote work setup with the possibility to grow into a larger role over time
This is a part-time, entry-level opportunity suitable for candidates with little or no prior experience. What matters most is your willingness to learn and apply new knowledge in practice.
Compensation: Competitive monthly pay structure with opportunities for progression as skills develop

We are seeking a talented individual to join our software team that focuses on designing, developing, maintaining, and enhancing software for various projects that are closely related to our core businesses. As part of the team, you will play a key role in designing scalable applications, involving frontend UI and backend infrastructure development.

Join us in building and managing a robust data transformation pipeline for our Finance teams. Your responsibilities will include designing and implementing data pipelines to ensure data quality, reliable data delivery, and timely financial reporting. You will also be tasked with creating tailored data products to enable users with self-service capabilities and accurate answers to their data inquiries.

Requirements:

Proficiency in Python for scripting purposes

Strong SQL skills for querying, transforming data, and optimizing performance

Experience with Apache Airflow or similar tools for working with Directed Acyclic Graphs (DAGs)

Ability to utilize GitHub for version control, collaboration, and branching

Collaborative mindset to effectively translate business requirements into technical solutions

Proficient in spoken English for communication purposes

Familiarity with Docker, Kubernetes, AWS/cloud platforms, and unit testing

Additional experience in Elixir, Cloudera Data Warehouse, AWS Athena/Tableau would be a bonus

Responsibilities:

Design and enhance Directed Acyclic Graphs (DAGs) with Python and Apache Airflow to meet financial reporting needs

Maintain internal tools for managing sensitive company data securely

Collaborate with various teams including Data Science, Data Warehouse, Exchange, Backend, and Finance to align on data requirements and deliverables

Document processes extensively to ensure smooth team collaboration and hand-offs

Life @ Crypto.com

Join a talented, ambitious, and supportive team that empowers you to think big and explore new opportunities. Benefit from a proactive and transformational working environment that encourages innovative solutions. Develop new skills and grow professionally within the organization while enjoying a supportive work culture where colleagues help one another achieve common goals. Embrace flexible work hours, remote work options, and take advantage of internal career mobility opportunities.

Benefits:

Competitive salary package

Generous annual leave entitlement, including birthday and work anniversary leave

Flexible work arrangements, including hybrid and remote setups

Opportunities for professional growth through internal mobility program

Enjoy work perks such as the Crypto.com visa card upon joining

Founded in 2016, Crypto.com is a global cryptocurrency platform serving millions of customers worldwide. Our mission is to make cryptocurrency accessible to everyone. With a focus on security, privacy, and compliance, we are driving cryptocurrency adoption through innovation to create a fairer digital ecosystem for the future generation.

Learn more about us at Crypto.com.

Crypto.com is committed to fostering an inclusive and diverse work environment where equal opportunities are provided to all individuals. We value and promote diversity and seek candidates from various backgrounds to strengthen and enrich our team.

Applicants' personal data will only be used for recruitment purposes. Please be advised that only shortlisted candidates will receive further communication. Artificial intelligence (AI) tools may be utilized in the recruitment process to support initial screenings or reviews; however, the final hiring decisions are made by human evaluators. For more information on data processing, feel free to contact us.

Responsibilities

Conducting, designing, and executing security control testing for identity management, key management, and infrastructure (network and cloud) configurations.

Supporting client assurance activities, including addressing Requests for Proposals (RFPs), Requests for Information (RFIs), and Due Diligence Questionnaires (DDQs).

Identifying and analyzing trends in client inquiries, providing feedback to internal teams to enhance documentation and control readiness.

Performing security due diligence and continuous monitoring for Web3/blockchain vendors, evaluating their control maturity, reviewing SOC reports and security documentation, and identifying residual risks.

Facilitating external audit activities by coordinating walkthroughs, collecting evidence, and tracking responses.

Identifying and analyzing gaps in current and new processes, developing and tracking remediation recommendations to completion (e.g., onboarding flow).

Developing and maintaining understanding of applicable financial regulatory security requirements, ensuring alignment of controls.

Researching and sharing information on security best practices, emerging threats, and mitigation strategies with internal teams.

Evaluating and recommending next-generation security tools, automation, and technologies to strengthen overall security posture.

Reviewing blockchain network or protocol upgrades for potential security impacts on the platform.

Requirements

Minimum 8 years of relevant experience in security assurance, audit, compliance, or cloud security engineering.

Demonstrated experience in testing and validating security controls across IAM, key management, and network/cloud environments.

Solid understanding of Identity and Access Management (IAM) principles.

Knowledge of cryptographic key management, HSMs, and KMS systems.

Strong grasp of cloud and network security architecture and configuration.

Proven experience in supporting SOC 1, SOC 2, ISO 27001, PCI DSS, or similar external audits and assessments.

Exposure to major cloud platforms (AWS, GCP, Azure) and infrastructure-as-code.

Experience in preparing client assurance materials, RFP/RFI/DDQ responses, and evidence documentation.

Familiarity with blockchain platforms or digital asset custody systems is a plus.

Capability to work independently and under pressure.

Excellent verbal and written communication skills.

Pragmatic and solution-oriented approach, ability to balance security requirements with operational feasibility and business needs.

Salary: $190,000 - $230,000 a year

We may utilize artificial intelligence (AI) tools for parts of the hiring process, like reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you need more information about how your data is handled, please contact us.

About Wintermute

Wintermute is a prominent crypto-native algorithmic trading firm in the digital asset space. Our services include providing liquidity algorithmically on various cryptocurrency exchanges and trading platforms, offering OTC trading solutions, and supporting blockchain projects and financial institutions entering the crypto realm. Additionally, Wintermute Ventures invests in early-stage DeFi projects.

Established in 2017 by industry experts, Wintermute blends the technological standards of high-frequency trading firms in traditional markets with the innovative and entrepreneurial culture of tech startups. We have a deep-rooted belief in the transformative potential of blockchain technology, viewing digital assets not merely as another asset class but as a source of meaningful innovation. We maintain a long-term outlook on the digital asset market and assertively lead in creating an innovative and compliant market.

About the Role

This position primarily involves technical support functions within our systems administration department, focusing on the desktop environment and providing support for our automated setup. Candidates for this role should exhibit a sense of responsibility and passion for pursuing or advancing their careers in infrastructure. The position offers the opportunity to collaborate with and learn from senior technologists, enhancing automation skills, particularly proficiency in Python. Given the dynamic nature of our business, we seek individuals to help uphold our networks and computing environment.

Wintermute provides avenues for individuals to enhance their automation skills.

Hard Skills Requirements

Demonstrate the drive to identify optimal solutions for problems of varying complexity, spanning tasks from data center management to addressing desktop issues.

Proficient in PC hardware and computer internals troubleshooting, capable of resolving workstation OS (Linux), applications, peripherals, network, and audio-visual problems.

At least 2 years of prior experience in desktop support or a related field.

Able to analyze, troubleshoot, and resolve hardware failures effectively.

Practical knowledge of Linux command-line operations is essential.

Familiarity with Git and working experience in hardware monitoring and performance tuning.

Collaborative approach in a team environment supporting production, back office computing, and end-user assistance activities.

Skilled in maintaining professional interactions with users during face-to-face interactions, desk-side visits, inquiries, and status updates.

Energetic, adaptable, and able to thrive in a high-paced environment.

Exceptional organizational skills and meticulous attention to detail.

Educational background in computer science or IT field preferred.

Clear and concise communication skills.

Basic understanding of Data center connectivity and TCP/IP Networking.

Capable of lifting 40 – 50 pounds; willingness to work weekend and evening shifts as required.

Nice to Have Skills

Working knowledge of Linux servers, networking principles (DNS, DHCP, VLAN), and Python.

Reasons to Join Our Team

Contribute your skills to a globally recognized algorithmic trading firm.

Engage in challenging projects with increased responsibilities compared to traditional financial settings.

Enjoy a vibrant working culture with team activities, celebrations, gaming events, and company-wide team building exercises.

Embrace our inclusive company culture that is informal, non-hierarchical, ambitious, professional with a startup feel, collaborative, and entrepreneurial.

Performance-driven compensation structure providing substantial earning potential, along with standard perks such as pension and private health insurance.