Senior Software Engineer
About Immunefi
At Immunefi, we are dedicated to safeguarding the future of digital currency by serving as Web3's primary defense against catastrophic hacks. We are a leading bug bounty platform that identifies and prevents security vulnerabilities before user funds are compromised. Our team consists of highly skilled professionals focused on protecting Web3, and we are seeking individuals who are eager to utilize their expertise to contribute to our mission. If you are drawn to a fast-paced, problem-solving environment at the core of decentralized finance (DeFi), please read on.
Summary
As Immunefi continues to expand, we are seeking to grow our software engineering and development teams. These teams work diligently to ensure the functionality, security, and usability of the Immunefi platform for our Project Clients and our Whitehat Hacker Community. The successful candidates will be experienced JavaScript Developers responsible for designing, developing, and maintaining the intricate web applications that form the Immunefi platform.
This position entails a comprehensive involvement in the software development lifecycle, from gathering requirements from the Product Department to conducting feasibility studies, creating engineering reviews, refining with Product, devising engineering plans, and collaborating in building, delivering, and deploying code in sprints.
If you are a proficient JavaScript developer adept in NextJS, React, Remix, and related frameworks, and eagerly seeking a new challenge, this role might be the perfect fit for you.
Please be sure to include your Github profile link on your CV.
Note: While our organization operates globally and is fully remote, applicants are expected to be within 4 hours on either side of GMT-6 (preference for GMT-6 to GMT-2) to align effectively with the engineering and development team.
Role Responsibilities
- Develop and implement high-performance, scalable web applications using JavaScript and related technologies
- Collaborate with Engineering, Development, and Product teams to fulfill platform functionality requirements
- Write clean, efficient, and maintainable code
- Explore and adopt new technologies to enhance development efficiency
- Contribute to technology development, suggest improvements, and iterate on ideas
- Troubleshoot and resolve issues throughout the full stack
- Implement automated tests to ensure code quality and sustainability
- Participate in code reviews and provide constructive feedback
- Stay updated on the latest web development trends and technologies
- Contribute to technical documentation development
Applicant Requirements
- Extensive software development experience, especially as a Full Stack JavaScript developer
- Proficiency in JavaScript, Next.js, React, and related technologies (extensive experience required)
- Background in transforming product design requirements into user interfaces
- Proficiency in TypeScript and PostgreSQL
- Solid understanding of web application architecture and design patterns
- Familiarity with unit testing and integration testing frameworks like Playwright, Cypress, or Jest
- Experience with Git and version control best practices
- Strong debugging and troubleshooting skills
- Prior experience in a fully remote company (preferred)
- Knowledge of Google Cloud, Docker, shell scripting, and Agile methodologies (preferred)
- Bachelor's degree in computer science or a related field (preferred but not mandatory)
Working at Immunefi
Immunefi acts as the premier Bug Bounty Marketplace in the crypto/Web3 realm, offering a platform that safeguards billions of user funds. We continuously aspire for excellence while building a team of adept professionals to drive our company's growth and scale. Successful candidates will work in a collaborative, cross-functional environment valuing ideas, feedback, and effective communication. Given our fully remote and globally dispersed team, individuals must excel in autonomous, self-driven work and adept at managing communication across various time zones.
Our Core Values
- Customer-centric approach laying the foundation for the best customer outcomes
- Constant vigilance ensuring high security standards for customer safety and success
- Bias for action to drive impactful decisions proactively
- Commitment to excellence, building a culture of discipline and accountability
- Think ambitiously and innovatively by setting audacious goals
- Act as an owner, driving outcomes till completion in service of the company's mission
- Build trust and maintain integrity in dealings with team members, customers, and community
What We Offer
- Remote-first work environment with flexible schedules
- Autonomous setting with trustworthy, smart team members
- Opportunity to contribute to an early-stage company in a dynamic industry
- Path to build your career within the evolving company
- Exposure to a global market and diverse individuals
- Chance to impact and secure the ecosystem for smart contracts and the future of finance, protecting over $100B in user funds
Ассистент по проектам веб-разработки и веб-дизайна
Мы ищем опытного менеджера проектов для управления проектами по веб-разработке и дизайну в сфере криптовалют.
Вы будете отвечать за полную реализацию проектов — от начала до сдачи, управляя собственной командой или координируя работу фрилансеров.
Обязанности:
Управление полным жизненным циклом проекта (планирование → сдача)
Координация разработчиков, дизайнеров и фрилансеров
Определение сроков, этапов и результатов
Обеспечение качества и своевременной сдачи проектов
Прямое взаимодействие с заказчиками
Требования:
Подтверждённый опыт управления веб-проектами
Умение работать самостоятельно или руководить командой
Опыт работы с фрилансерами
Сильные организационные и коммуникативные навыки
Базовое понимание криптовалют / Web3
Оплата:
От $3000 в месяц
Выплаты в криптовалюте (по желанию)
Долгосрочное сотрудничество
Мы предлагаем:
Полностью удалённую работу
Постоянный поток проектов
Возможность роста в сфере криптовалют
Важно:
Мы ищем человека, способного качественно и в срок реализовывать проекты «под ключ».
Assistant for web development and web design projects
We are looking for an experienced Project Manager to manage web development and design
projects in the crypto space.
You will be responsible for delivering projects end-to-end, either by managing your own team or
coordinating freelance professionals.
Responsibilities:
- Manage full project lifecycle (planning → delivery)
- Coordinate developers, designers, and freelancers
- Define timelines, milestones, and deliverables
- Ensure quality and on-time delivery
- Communicate directly with stakeholders
Requirements:
- Proven experience in web project management
- Ability to work independently or lead a team
- Experience working with freelancers
- Strong organizational and communication skills
- Basic understanding of crypto / Web3
Compensation:
- Starting from $3000/month
- Paid in crypto (optional)
- Long-term collaboration opportunity
What we offer:
- Fully remote position
- Continuous flow of projects
- Opportunity to grow within the crypto space
Important:
We are looking for someone who can deliver complete turnkey projects with high quality and within
deadlines.
Startup
Senior Software Engineer (Blockchain)
MentTech is a forward-thinking technology company dedicated to transforming how mentoring and learning are delivered in the digital age. By combining advanced tools, intelligent systems, and a human-first approach, MentTech helps individuals, teams, and organizations harness the power of mentorship to unlock potential, build skills, and achieve lasting growth.
The Role
We are seeking a Smart Contract Developer responsible for ensuring that game listings within MentTech work properly and ensuring compliance with all game store policies.
Key Responsibilities:
• Architect, implement, and deploy secure smart contracts for an on-chain Play-to-Earn GameFi ecosystem
• Lead contract design decisions with a focus on robustness, auditability, gas efficiency, and resilience to attack vectors
• Mentor/junior developers: perform code reviews, establish standards, best practices in security & testing
• Collaborate cross-functionally with game designers, backend, QA, and security teams to align smart contract features with product roadmap
Qualifications:
• 2+ years hands‐on experience developing & deploying smart contracts (Solidity / EVM or equivalent) in production environments
• Track record of writing secure contracts, familiarity with common vulnerabilities (reentrancy, integer over/underflow, front-running, flash loans, etc.)
• Experience with audits, formal verification, fuzz testing, or other advanced contract assurance methods
• Strong test suite / CI workflow skills; comfortable using tools like Hardhat, Foundry, Truffle etc.
• Solid understanding of GameFi mechanics and how on-chain economics work
Bonus Points:
• Experience on multiple EVM chains or Layer-2 / sidechains
• Knowledge of cross-chain bridges, oracles, NFTs, tokenomics design
• Contributions to open-source security tooling or prior audit reports or published code you’re proud of
Why join MentTech?
At MentTech, we cultivate a culture of flexibility, autonomy, and the freedom to make a real impact on the broader Web3 ecosystem. Experience the advantages of a fully remote working environment where your expertise and contributions are rewarded with competitive compensation tailored to your role and project influence.
Ment Tech Labs
• Employee Equity & Incentives: Unlock future growth with equity and other potential incentives.
• Entrepreneurial Culture: Join a collaborative environment where we innovate together as partners.
• Cutting-edge Innovation: Work at the forefront of gaming and blockchain.
• Key Strategic Projects: Be part of transformative initiatives that are redefining the gaming landscape.
• Remote Flexibility: Enjoy a truly flexible, fully remote work setup that supports your lifestyle.
• Talented Team: Collaborate with a team of passionate, driven, and skilled professionals.
• Community Impact: Contribute to the growth and success of the Web3 and gaming communities.
• Flexible Payment Options: Receive payments in crypto or fiat, tailored to your preference.
• Growth Opportunities: Access valuable learning experiences and development paths.
MentTech Labs, Inc. is an equal opportunities workplace that doesn’t discriminate based on race, ethnicity, gender, ancestry, national origin, religion, sex, sexual orientation, gender identity, age disability, veteran status, genetic information, marital status, or any other legally protected status.
Junior / Middle Metaverse Developer (Unity / Web3 / VR)
You will work with Unity, WebGL, and blockchain technologies to create engaging metaverse features and optimize them for performance across different devices. The developer will collaborate with designers and backend engineers to deliver scalable and stable products.
Requirements include experience with Unity and C#, understanding of 3D development, Web3 or blockchain basics, and familiarity with Git and API integration. Experience with VR/AR, NFTs, or multiplayer systems is a plus.
We offer remote work, flexible hours, crypto payments, and the opportunity to build innovative metaverse products.