Internal Systems Developer Intern (f/m)
Founded in 2014, Ledger is a globally recognized platform that aims to democratize access to digital assets and Web3 technology. Ledger is at the forefront of the industry, securing over 20% of the world's crypto assets with its Ledger Nanos. The company is headquartered in Paris and Vierzon, with additional offices in the UK, US, Switzerland, and Singapore. Ledger boasts a diverse team of over 500 professionals dedicated to developing products and services that empower individuals and businesses to securely purchase, store, exchange, grow, and manage their crypto assets.
Ledger prides itself on its core values of Pragmatism, Audacity, Commitment, Trust, and Transparency, which are integral to the company's identity and operations. As part of the dedicated Internal Systems team, you will contribute to the development and maintenance of essential tools built on PHP/Symfony that support Ledger's operations and success. In this role, you will collaborate with a team of experts and closely liaise with various departments within the company.
Your responsibilities will include working alongside a team of nine professionals to enhance internal tools related to order management, shipping, and invoicing. You will tackle a wide range of technical and functional challenges, engage with different teams such as E-commerce, Sales, Finance, and Shipping & Logistics to address their requirements, and actively participate in team and sprint meetings to showcase your contributions.
The ideal candidate for this role is a computer science student with a level of Bac+3 to Bac+5, possessing a strong foundation in PHP or a similar language. Additionally, proficiency in SQL, GIT, object-oriented programming, and fluency in French and English are required. A collaborative spirit, a passion for teamwork, and a keen interest in sharing and adopting best development practices are highly valued qualities.
In return for your contributions, Ledger offers a range of benefits tailored to enhance your work experience, including a hybrid work policy for flexibility, regular social events with snacks and drinks, access to cutting-edge office equipment and gadgets, partial reimbursement of transportation costs, lunch vouchers through Swile, and additional vacation days based on tenure.
A commitment to equality and diversity is ingrained in Ledger's ethos, and the company serves as an equal opportunity employer, welcoming individuals of all backgrounds and identities.
Ассистент по проектам веб-разработки и веб-дизайна
Ищу человека, который будет помогать вести проекты по веб-разработке и дизайну в сфере крипты.
Если коротко — нужно доводить проекты от старта до финала: общаться с командой, следить за сроками и чтобы всё было сделано хорошо.
Что нужно делать:
Вести проекты от начала до конца
Общаться с разработчиками, дизайнерами и фрилансерами
Следить за сроками и задачами
Общаться с клиентами
Что важно:
Есть опыт в веб-проектах
Умеешь работать сам или с командой
Уже работал с фрилансерами
Нормально общаешься и умеешь организовать процесс
Понимаешь базу крипты / Web3 (не обязательно супер-эксперт)
Условия:
От $3000 в месяц
Можно получать оплату в крипте
Удалёнка
Долгосрочная работа и много проектов
Ищу простого и надёжного человека, который реально доводит дела до конца
Assistant for web development and web design projects
I’m looking for someone to help manage web development and design projects in the crypto space.
In short — the goal is to take projects from start to finish: communicate with the team, keep track of deadlines, and make sure everything gets done properly.
What you’ll do:
Manage projects from start to finish
Communicate with developers, designers, and freelancers
Keep track of deadlines and tasks
Communicate directly with clients
What I’m looking for:
Experience with web projects
Ability to work independently or with a team
Experience working with freelancers
Good communication and organizational skills
Basic understanding of crypto / Web3 (no need to be an expert)
Conditions:
Starting from $3000/month
Crypto payments available
Fully remote
Long-term work with a steady flow of projects
I’m looking for a reliable, down-to-earth person who actually gets things done
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.