Senior Security Engineer
Tokyo, Japan
Full time
Office
Compensation is not specified
Role
Security Engineer
Description
Location: Tokyo, Japan, On-site
About us:
Deep expertise, personal and industry evolution, and impeccable craft are the fundamental principles upon which Limit Break was founded. Limit Break is established by accomplished industry leaders in the mobile gaming sector. Our mission is to expand the potential of mobile gaming, transcending it into real-world economies and creating vibrant digital communities that push the boundaries of gaming economies for both players and traders. We leverage technology, cryptocurrency, and creative innovation to craft experiences that bring people across the globe together.
Limit Break has the support of prominent investors such as Buckley Ventures and Paradigm Ventures, reflecting the significant growth in the crypto market and solidifying its position as the driving force behind future technologies, with gaming leading the charge.
About the Role:
Limit Break is seeking Senior Security Engineers to join our team. As the inaugural addition to the Limit Break Information Security team in Tokyo, you will have the exciting opportunity to shape infosec practices, teams, and processes, fostering a customer-centric culture from the ground up.
This role presents a unique chance for an inquisitive and dedicated individual to influence the engineering landscape in mobile gaming and blockchain technologies.
Responsibilities: What you’ll do
- Deploy Cloud, Container, AWS Compliance, IDS, and IPS tools.
- Establish a Security Incident Management Process.
- Enhance the existing vulnerability management workflow.
- Identify and resolve issues in collaboration with the engineering team.
- Implement Alerting and Monitoring with an on-call rotation.
- Integrate CI/CD and Code vulnerability tools.
- Collaborate with IT and SRE teams to establish secure environment processes and workflows.
Requirements: Who you are and what you’ve done
- Over 5 years of experience in Information Security with a robust Kubernetes background for securing containers, images, and deployments.
- Proficient in AWS and securing cloud environments.
- Skilled in Terraform and Ansible.
- Experience with implementing and managing IDS, IPS, SAST, and DAST tools.
- Prior experience in startup environments.
Skills Required
Limitbreak
Website
limitbreak.comCompany size
Not specified
Location
Japan
Description
Not specified
Astra Byte Sync
Web3 Gaming Platform Development Team
Full time
Remote
Company Overview
A fastest growing Blockchain company is looking to create a decentralized gaming platform that empowers players and developers alike. We are currently seeking to build a talented team to bring their vision to life.
Position Overview
We are looking for skilled professionals to join our development team for a Web3 gaming platform. The ideal candidates will be passionate about blockchain technology and gaming, and possess the expertise to contribute to various aspects of our project. We are hiring for the following roles:
1. Frontend Developers
Responsibilities: Design and implement user interfaces for the gaming platform using modern frameworks (e.g., React, Vue.js). Collaborate with UX/UI designers to create engaging and intuitive user experiences.
Qualifications: Proficiency in HTML, CSS, JavaScript, and relevant frameworks. Experience with Web3 technologies is a plus.
2. Backend Developers
Responsibilities: Develop and maintain server-side logic, database management, and API integration. Ensure the platform's performance, security, and scalability.
Qualifications: Strong knowledge of Node.js, databases (e.g., MongoDB, PostgreSQL), and experience with cloud services. Familiarity with blockchain technology is advantageous.
3. Blockchain Developers
Responsibilities: Design and implement smart contracts, manage blockchain integrations, and ensure the security of decentralized applications. Collaborate with the team to optimize blockchain performance.
Qualifications: Expertise in Solidity, JavaScript, Rust, or Python. Experience with Ethereum and other blockchain platforms is essential.
4. Technical Leader
Responsibilities: Oversee the technical direction of the project, mentor team members, and ensure best practices in development. Collaborate with stakeholders to align technical goals with business objectives.
Qualifications: Proven experience in leading development teams, strong problem-solving skills, and a deep understanding of blockchain technologies.
5. Project Manager
Responsibilities: Manage project timelines, resources, and deliverables. Facilitate communication between team members and stakeholders, ensuring that the project stays on track and within budget.
Qualifications: Strong organizational and leadership skills, experience in project management methodologies (Agile, Scrum), and familiarity with the gaming and blockchain industries.
What We Offer
Competitive salaries and benefits
A dynamic and collaborative work environment
Opportunities for professional growth and development
The chance to be part of an innovative project that shapes the future of gaming
How to Apply
If you are passionate about gaming and blockchain technology and are excited to contribute to a groundbreaking project, we would love to hear from you! Please submit your resume and a cover letter detailing your relevant experience and why you would be a great fit for our team.
Join us in creating the next generation of gaming experiences!
A fastest growing Blockchain company is looking to create a decentralized gaming platform that empowers players and developers alike. We are currently seeking to build a talented team to bring their vision to life.
Position Overview
We are looking for skilled professionals to join our development team for a Web3 gaming platform. The ideal candidates will be passionate about blockchain technology and gaming, and possess the expertise to contribute to various aspects of our project. We are hiring for the following roles:
1. Frontend Developers
Responsibilities: Design and implement user interfaces for the gaming platform using modern frameworks (e.g., React, Vue.js). Collaborate with UX/UI designers to create engaging and intuitive user experiences.
Qualifications: Proficiency in HTML, CSS, JavaScript, and relevant frameworks. Experience with Web3 technologies is a plus.
2. Backend Developers
Responsibilities: Develop and maintain server-side logic, database management, and API integration. Ensure the platform's performance, security, and scalability.
Qualifications: Strong knowledge of Node.js, databases (e.g., MongoDB, PostgreSQL), and experience with cloud services. Familiarity with blockchain technology is advantageous.
3. Blockchain Developers
Responsibilities: Design and implement smart contracts, manage blockchain integrations, and ensure the security of decentralized applications. Collaborate with the team to optimize blockchain performance.
Qualifications: Expertise in Solidity, JavaScript, Rust, or Python. Experience with Ethereum and other blockchain platforms is essential.
4. Technical Leader
Responsibilities: Oversee the technical direction of the project, mentor team members, and ensure best practices in development. Collaborate with stakeholders to align technical goals with business objectives.
Qualifications: Proven experience in leading development teams, strong problem-solving skills, and a deep understanding of blockchain technologies.
5. Project Manager
Responsibilities: Manage project timelines, resources, and deliverables. Facilitate communication between team members and stakeholders, ensuring that the project stays on track and within budget.
Qualifications: Strong organizational and leadership skills, experience in project management methodologies (Agile, Scrum), and familiarity with the gaming and blockchain industries.
What We Offer
Competitive salaries and benefits
A dynamic and collaborative work environment
Opportunities for professional growth and development
The chance to be part of an innovative project that shapes the future of gaming
How to Apply
If you are passionate about gaming and blockchain technology and are excited to contribute to a groundbreaking project, we would love to hear from you! Please submit your resume and a cover letter detailing your relevant experience and why you would be a great fit for our team.
Join us in creating the next generation of gaming experiences!
ghed santos
Founding Head of Engineering
San Francisco, USA
San Francisco, USA
Full time
Remote
About The Project:The project is a venture-backed stealth mode project having raised $2 million and building a Social Intelligence Engine designed to power smarter, faster crypto trading. We're combining advanced data infrastructure and real-time intelligence to unlock new trading possibilities. About the Role:We're looking for a tech-savvy, investor-facing leader with an engineering background to represent us on the frontlines. This is not a research role it's about amplifying our voice, building relationships, and being the bridge between our technology and the world. Key Responsibilities:1）Represent us externally at hackathons, pitch events, conferences, and investor meetings.2）Be our lead evangelist clearly explaining our tech vision to both technical and non-technical audiences.3）Drive fundraising efforts with compelling presentations, clear strategy narratives, and investor Q&A.4）Partner closely with engineering/product to demo the platform, shape the roadmap, and turn market feedback into action. Requirements:1）Strong engineering background (AI, blockchain, data infrastructure, or similar).2）Proven experience in investor-facing roles, including fundraising and pitching.3）Excellent presentation and communication skills, with a track record of representing projects publicly.4）Experience participating in or leading hackathons, demos, and tech events.5）Understanding of consumer behavior data in gaming and apps is a plus.6）Familiarity with Web3, crypto, and developer communities. Compensation:Competitive salary + equity + team token + and performance-based incentives.
Payment in Crypto
Iron Key Capital
Venture Fellow (Part-Time, Remote)
Part time
Remote
About Iron Key Capital:
Iron Key Capital is an investment firm specializing in liquid and venture opportunities in the crypto space. We invest in pre-seed and seed-stage Web3 startups focused on enterprise adoption of utility-driven digital assets. Additionally, we operate a blockchain innovation lab and incubate startups within the Web3 infrastructure sector. Backed by 200+ LPs globally, Iron Key deploys over $1M annually.
Role Overview:
The Venture Fellow program is an 8-week, part-time, remote opportunity designed for individuals eager to develop their skills in venture capital and angel investing. Fellows will gain hands-on experience in early-stage investing, including deal sourcing, due diligence, and pitching investment opportunities.
This program is ideal for aspiring investors, founders, or professionals exploring a career shift into venture capital. Fellows will work closely with seasoned venture capitalists and gain access to Iron Key’s investor community to learn best practices in the field.
Key Responsibilities:
Identify and evaluate early-stage investment opportunities in the Web3 ecosystem.
Conduct market research and due diligence on potential investments.
Collaborate with the Iron Key team on deal sourcing and portfolio management.
Engage with investors and team members to develop investment strategies.
Contribute to thought leadership on topics related to venture capital and Web3 innovation.
Qualifications:
Strong analytical and problem-solving skills to evaluate investment opportunities.
Excellent communication and interpersonal skills for engaging with team members and stakeholders.
Experience in Web3, AI, or related technologies is preferred.
Involvement in startups, entrepreneurial ecosystems, or Web3 communities is a plus.
Aspiring to transition into venture capital or professionalize angel investing skills.
Bonus: Previous experience as a founder or working within early-stage startups.
Program Details:
Duration: 8 weeks (part-time)
Location: Remote
Compensation: Competitive, based on experience
How to Apply:
Submit your application through this link:
https://airtable.com/appfCDlkorF5FL3VZ/pagnjuRX1A7gZjBGc/form
Additional Information:
This program is designed to take the guesswork out of breaking into venture capital or professionalizing angel investing. Successful Fellows may have opportunities to advance into Venture Partner or Core Contributor roles at Iron Key.
Iron Key Capital is an investment firm specializing in liquid and venture opportunities in the crypto space. We invest in pre-seed and seed-stage Web3 startups focused on enterprise adoption of utility-driven digital assets. Additionally, we operate a blockchain innovation lab and incubate startups within the Web3 infrastructure sector. Backed by 200+ LPs globally, Iron Key deploys over $1M annually.
Role Overview:
The Venture Fellow program is an 8-week, part-time, remote opportunity designed for individuals eager to develop their skills in venture capital and angel investing. Fellows will gain hands-on experience in early-stage investing, including deal sourcing, due diligence, and pitching investment opportunities.
This program is ideal for aspiring investors, founders, or professionals exploring a career shift into venture capital. Fellows will work closely with seasoned venture capitalists and gain access to Iron Key’s investor community to learn best practices in the field.
Key Responsibilities:
Identify and evaluate early-stage investment opportunities in the Web3 ecosystem.
Conduct market research and due diligence on potential investments.
Collaborate with the Iron Key team on deal sourcing and portfolio management.
Engage with investors and team members to develop investment strategies.
Contribute to thought leadership on topics related to venture capital and Web3 innovation.
Qualifications:
Strong analytical and problem-solving skills to evaluate investment opportunities.
Excellent communication and interpersonal skills for engaging with team members and stakeholders.
Experience in Web3, AI, or related technologies is preferred.
Involvement in startups, entrepreneurial ecosystems, or Web3 communities is a plus.
Aspiring to transition into venture capital or professionalize angel investing skills.
Bonus: Previous experience as a founder or working within early-stage startups.
Program Details:
Duration: 8 weeks (part-time)
Location: Remote
Compensation: Competitive, based on experience
How to Apply:
Submit your application through this link:
https://airtable.com/appfCDlkorF5FL3VZ/pagnjuRX1A7gZjBGc/form
Additional Information:
This program is designed to take the guesswork out of breaking into venture capital or professionalizing angel investing. Successful Fellows may have opportunities to advance into Venture Partner or Core Contributor roles at Iron Key.
Iron Key Capital
Founder Fellow
Full time
Remote
Founder Fellow
📍 Remote | 3-Month Contract
🚀 About Iron Key & Iron Key Capital
Iron Key, backed by Iron Key Capital, is a venture community and investment firm focused on liquid and venture opportunities in crypto, Web3, and AI. Our mission is to invest in and support Pre-Seed and Seed-stage startups, equipping founders and investors with the tools and knowledge they need to succeed.
We operate a blockchain innovation lab and incubate startups in venture infrastructure, fintech, IP ownership, and application development. Iron Key Capital is backed by 200+ global LPs, deploying $1M+ annually into emerging opportunities.
📢 The Opportunity: Entrepreneur in Residence (EIR)
We are seeking a technical co-founder or EIR to help bring a newly incubated venture infrastructure product to market. This is a 3-month remote contract role, ideal for builders with Web3 and AI experience who want to launch a company with hands-on support.
Iron Key has developed proprietary AI tools for internal workflows and is exploring opportunities to externalize these as software-based consulting services or standalone software products. As an EIR, you’ll play a critical role in shaping, launching, and scaling these innovations.
🔹 Key Responsibilities
Lead Startup Development – Take an incubated idea from concept to market launch.
Drive Innovation – Bring your own venture idea or work on an existing Iron Key product.
Strategic Execution – Develop and implement growth strategies.
Hands-on AI & Web3 Work – Build and iterate on cutting-edge solutions in AI and blockchain.
Leverage Resources – Work alongside investors, advisors, and a global network to accelerate your startup.
🎯 What We’re Looking For
Proven entrepreneurial experience – Ideally, you’ve built a startup before (even if it failed).
Deep Web3 or AI expertise – Hands-on experience in AI, blockchain, or fintech is a must.
Strong problem-solving mindset – Ability to pivot, adapt, and execute in fast-changing environments.
Leadership & Vision – You’re a self-starter who can drive a business forward.
🔥 Why Join Iron Key?
Founder-Centric Program – Hands-on support to launch a company.
Unmatched Network – Access to top investors, mentors, and builders in crypto and AI.
Long-Term Value – Lifetime membership in the Iron Key community & alumni network.
Fundraising Support – Get exposure to global investors and funding opportunities.
📩 Apply Now
If you're ready to build and scale a new venture, apply here:
👉 https://airtable.com/appfCDlkorF5FL3VZ/paggWhwbIDwnmlzlK/form
📍 Remote | 3-Month Contract
🚀 About Iron Key & Iron Key Capital
Iron Key, backed by Iron Key Capital, is a venture community and investment firm focused on liquid and venture opportunities in crypto, Web3, and AI. Our mission is to invest in and support Pre-Seed and Seed-stage startups, equipping founders and investors with the tools and knowledge they need to succeed.
We operate a blockchain innovation lab and incubate startups in venture infrastructure, fintech, IP ownership, and application development. Iron Key Capital is backed by 200+ global LPs, deploying $1M+ annually into emerging opportunities.
📢 The Opportunity: Entrepreneur in Residence (EIR)
We are seeking a technical co-founder or EIR to help bring a newly incubated venture infrastructure product to market. This is a 3-month remote contract role, ideal for builders with Web3 and AI experience who want to launch a company with hands-on support.
Iron Key has developed proprietary AI tools for internal workflows and is exploring opportunities to externalize these as software-based consulting services or standalone software products. As an EIR, you’ll play a critical role in shaping, launching, and scaling these innovations.
🔹 Key Responsibilities
Lead Startup Development – Take an incubated idea from concept to market launch.
Drive Innovation – Bring your own venture idea or work on an existing Iron Key product.
Strategic Execution – Develop and implement growth strategies.
Hands-on AI & Web3 Work – Build and iterate on cutting-edge solutions in AI and blockchain.
Leverage Resources – Work alongside investors, advisors, and a global network to accelerate your startup.
🎯 What We’re Looking For
Proven entrepreneurial experience – Ideally, you’ve built a startup before (even if it failed).
Deep Web3 or AI expertise – Hands-on experience in AI, blockchain, or fintech is a must.
Strong problem-solving mindset – Ability to pivot, adapt, and execute in fast-changing environments.
Leadership & Vision – You’re a self-starter who can drive a business forward.
🔥 Why Join Iron Key?
Founder-Centric Program – Hands-on support to launch a company.
Unmatched Network – Access to top investors, mentors, and builders in crypto and AI.
Long-Term Value – Lifetime membership in the Iron Key community & alumni network.
Fundraising Support – Get exposure to global investors and funding opportunities.
📩 Apply Now
If you're ready to build and scale a new venture, apply here:
👉 https://airtable.com/appfCDlkorF5FL3VZ/paggWhwbIDwnmlzlK/form
Iron Key Capital
Venture Scout
Full time
Remote
Venture Scout (Part-Time, Remote) - Iron Key Capital
Location: Remote (Global)
About Iron Key Capital:
Iron Key Capital is an investment firm specializing in liquid and venture opportunities in the crypto space. We invest in pre-seed and seed-stage Web3 startups focused on enterprise adoption of utility-driven digital assets. Additionally, we operate a blockchain innovation lab and incubate startups within the Web3 infrastructure sector. Backed by 200+ LPs globally, Iron Key deploys over $1M annually.
Role Overview:
The Venture Fellow program is an 8-week, part-time, remote opportunity designed for individuals eager to develop their skills in venture capital and angel investing. Fellows will gain hands-on experience in early-stage investing, including deal sourcing, due diligence, and pitching investment opportunities.
This program is ideal for aspiring investors, founders, or professionals exploring a career shift into venture capital. Fellows will work closely with seasoned venture capitalists and gain access to Iron Key’s investor community to learn best practices in the field.
Key Responsibilities:
Identify and evaluate early-stage investment opportunities in the Web3 ecosystem.
Conduct market research and due diligence on potential investments.
Collaborate with the Iron Key team on deal sourcing and portfolio management.
Engage with investors and team members to develop investment strategies.
Contribute to thought leadership on topics related to venture capital and Web3 innovation.
Qualifications:
Strong analytical and problem-solving skills to evaluate investment opportunities.
Excellent communication and interpersonal skills for engaging with team members and stakeholders.
Experience in Web3, AI, or related technologies is preferred.
Involvement in startups, entrepreneurial ecosystems, or Web3 communities is a plus.
Aspiring to transition into venture capital or professionalize angel investing skills.
Bonus: Previous experience as a founder or working within early-stage startups.
Program Details:
Duration: 8 weeks (part-time)
Location: Remote
Compensation: Competitive, based on experience
How to Apply:
Submit your application through this link:
https://airtable.com/appfCDlkorF5FL3VZ/pagnjuRX1A7gZjBGc/form
Additional Information:
This program is designed to take the guesswork out of breaking into venture capital or professionalizing angel investing. Successful Fellows may have opportunities to advance into Venture Partner or Core Contributor roles at Iron Key.
Location: Remote (Global)
About Iron Key Capital:
Iron Key Capital is an investment firm specializing in liquid and venture opportunities in the crypto space. We invest in pre-seed and seed-stage Web3 startups focused on enterprise adoption of utility-driven digital assets. Additionally, we operate a blockchain innovation lab and incubate startups within the Web3 infrastructure sector. Backed by 200+ LPs globally, Iron Key deploys over $1M annually.
Role Overview:
The Venture Fellow program is an 8-week, part-time, remote opportunity designed for individuals eager to develop their skills in venture capital and angel investing. Fellows will gain hands-on experience in early-stage investing, including deal sourcing, due diligence, and pitching investment opportunities.
This program is ideal for aspiring investors, founders, or professionals exploring a career shift into venture capital. Fellows will work closely with seasoned venture capitalists and gain access to Iron Key’s investor community to learn best practices in the field.
Key Responsibilities:
Identify and evaluate early-stage investment opportunities in the Web3 ecosystem.
Conduct market research and due diligence on potential investments.
Collaborate with the Iron Key team on deal sourcing and portfolio management.
Engage with investors and team members to develop investment strategies.
Contribute to thought leadership on topics related to venture capital and Web3 innovation.
Qualifications:
Strong analytical and problem-solving skills to evaluate investment opportunities.
Excellent communication and interpersonal skills for engaging with team members and stakeholders.
Experience in Web3, AI, or related technologies is preferred.
Involvement in startups, entrepreneurial ecosystems, or Web3 communities is a plus.
Aspiring to transition into venture capital or professionalize angel investing skills.
Bonus: Previous experience as a founder or working within early-stage startups.
Program Details:
Duration: 8 weeks (part-time)
Location: Remote
Compensation: Competitive, based on experience
How to Apply:
Submit your application through this link:
https://airtable.com/appfCDlkorF5FL3VZ/pagnjuRX1A7gZjBGc/form
Additional Information:
This program is designed to take the guesswork out of breaking into venture capital or professionalizing angel investing. Successful Fellows may have opportunities to advance into Venture Partner or Core Contributor roles at Iron Key.