Senior Software Engineer (371)
Are you seeking an opportunity to advance your international career with support every step of the way?
Ubiminds, a GPTW certified company, partners with American software product companies to expand their development capabilities by handpicking the top 5% of Brazilian talent for their regional strategies.
Currently, Ubiminds is collaborating with a company working on an innovative Public Safety product suite.
Responsibilities
Collaborate with Tech Lead and Engineering Manager to contribute to development projects primarily focused on Node.js, Express, React, and Next.js.
Contribute to backend development and integration to ensure delivery of reliable and scalable solutions.
Manage and optimize CI/CD pipelines to facilitate automated and efficient deployment processes.
Execute deployments and comprehensive testing procedures to ensure high-quality code and system stability.
Own projects entirely by actively participating in daily scrum meetings, liaising with cross-functional teams, and aligning project objectives and deadlines.
Required Qualifications
Over 5 years of experience in FullStack development, evidencing a track record of delivering top-notch solutions.
Proficiency in Node.js, Express, React, and Next.js, showcasing the ability to construct and maintain scalable applications.
Strong communication skills enabling effective collaboration across teams and clear presentation of ideas.
Preferred Qualifications
Background in software architecture with expertise in scalable system design and best practices.
Experience in the automotive industry or payments sector, providing domain-specific knowledge and insights.
Familiarity with Firebase and AWS, utilizing cloud services to enhance performance, reliability, and scalability.
About Ubiminds
Culture
Emphasis on prioritizing people within the organization.
Encouragement for self-improvement and continuous growth.
Directive to tackle challenges with a positive attitude.
Team-oriented work environment fostering collaboration and progress.
Dedication to delivering high-quality services and exceeding expectations.
Commitment to honesty, transparency, and openness in all situations.
Perks and Benefits
Opportunity to work for a product-focused company with equivalent benefits as full-time employees.
Full back-office support covering career guidance, HR, and concierge services.
Remote-friendly environment with company-wide remote-first policy.
Provision of company-issued MacBook for work.
Access to networking opportunities with tech professionals through tech talks and remote social events.
Free English lessons with a native speaker to enhance communication skills.
Candidate referral bonus program available.
Work-from-office option in Florianópolis headquarters with additional amenities like massages, snacks, soft drinks, and games.
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.