Senior Software Engineer (Golang/Ruby on Rails)

About Teamix
Teamix is a platform connecting top-tier talent in blockchain and AI with innovative startups and companies building decentralized products. We’re looking for a Senior Blockchain Developer to join our network of experts, where you’ll contribute to the development of blockchain systems that bridge the gap between real-world assets and decentralized finance (DeFi). This is an exciting opportunity to work with mission-driven startups, bringing advanced blockchain solutions to scale.
Only apply here: https://www.myteamix.com/#/talent-ai-platform
Your Responsibilities
As a Senior Blockchain Developer, you will:
Design, develop, and implement secure blockchain systems to support innovative decentralized solutions.
Contribute to the development of private and public blockchain networks, including smart contracts, tokenization, and ledger management.
Collaborate with engineering teams across multiple projects to iterate and improve blockchain functionality.
Build and maintain backend services that scale efficiently to support decentralized applications (DApps) and blockchain-based platforms.
Participate in code reviews, ensuring the highest standards of blockchain security, accuracy, and performance.
Stay up to date with blockchain trends and technologies to enhance the architecture and features of projects.
Work closely with startups to ensure blockchain implementations meet business objectives and deliver verifiable trust in decentralized systems.
 
Key Requirements
3+ years of dedicated blockchain development experience, including expertise with Ethereum, Solana, and smart contract frameworks.
5+ years of experience building scalable backend services in languages such as Golang, Rust, Java, TypeScript, or Python.
Proven track record of delivering secure, high-performance blockchain solutions.
Strong understanding of blockchain consensus mechanisms, tokenization, and decentralized architecture.
 
Preferred Qualifications
Experience with private blockchain networks like Hyperledger, CordaR3, or DAML.
Knowledge of interoperability solutions between different blockchain networks.
Familiarity with zero-knowledge proofs and their applications.
Experience building decentralized applications (DApps).
Previous experience with Blockchain-as-a-Service platforms.
Why Join Teamix?
Teamix offers flexibility and the opportunity to work on impactful projects within a global network of Web3 and AI experts. You’ll collaborate with startups that are building cutting-edge blockchain solutions and help shape the future of decentralized finance, smart contracts, and more.
Apply here: https://www.myteamix.com/#/talent-ai-platform

We are looking for a talented and driven backend engineer with system design and architecture experience. This position entails complete remote work, encompassing the end-to-end process of designing, building, and scaling critical infrastructure services for a large user base of hundreds of thousands.
What you will do
Write well-structured, and efficient code contributing to the development of new services and features.
Identify bottlenecks and optimize existing infrastructure.
Shape the direction of the platform and the product, making architectural decisions and driving innovation and improvement.
Participate in the planning of technical tasks and code reviews.
Be an integral part of a dynamic team, willing to take the initiative and contribute to the continuous improvement and growth of the Zerion platform.
Work as part of an autonomous cross-functional team, and collaborate closely with frontend and mobile engineers on product development.
What we are looking for
5+ years of experience in designing & building distributed backend systems.
Solid knowledge of basic algorithms, data structures, and design patterns.
Familiarity with Blockchain systems, dApps, and smart contracts.
Willingness to work in a fast-paced startup environment.
Desire to take an active part in our product evolution.
You're likely to succeed if you have
Excellent knowledge of Golang.
Experience with containerized systems: Docker & Kubernetes.
Experience with SQL / NoSQL databases: Postgres, MongoDB, Cassandra.
Experience with monitoring tools: Sentry, Prometheus, and Grafana.
Experience with AWS (Amazon Web Services).
Experience with Python3.
Experience working in a startup environment, that encourages trust and autonomy.
You are likely a perfect candidate if
You are an active Web3 user.
You have worked with time-series data and specialized databases: ClickHouse, TimescaleDB, etc.
You have pet projects, blog articles and/or open-source contributions.
You have participated in the industry conferences.
Why You Should Join
Culture: Our high engagement and low turnover emphasize our commitment to a positive culture, with a remarkable retention rate of 92%.
People: Collaborate with some of the most driven and intelligent individuals in the crypto space.
Salary & Benefits: Receive a competitive salary, medical insurance, coworking membership, and additional benefits.
Unlimited Days Off and Flexible Work Schedule: Recharge and explore life outside the office with our flexible time-off policy and work schedule.
Remote Work Essentials: We provide all the necessary software and equipment to ensure you're fully equipped to work from home comfortably and efficiently.
Stock Options: Contribute to Zerion's success and watch your stock options become valuable.
Relocation: We support relocation for you and your family.
Travel: Join your colleagues on trips to industry festivals and events.
Distributed Team: Zerion is a fully remote team with members worldwide. Embrace asynchronous collaboration, find your own work rhythm, and enjoy a healthy work-life balance.
Company Overview
Highlights:
+350 Monthly Active Funded Wallets
+250k Monthly Active Zerion Wallets
255k Unique Zerion DNA Holders
Zerion helps to manage your DeFi and NFT portfolios, trade across 10+ networks and connect to any decentralized application with one wallet. Our mission is to empower more people around the world with efficient, permissionless and transparent financial services.
To ALL recruitment agencies and individual recruiters: Zerion only accepts resumes from its partners, with whom Zerion has contractual relations. Zerion is not responsible for any fees or charges associated with unsolicited resumes.

Wallet in Telegram is your gateway to the world of digital currencies, specially tailored for individuals in emerging markets. We understand the complexities and intimidation often associated with existing crypto solutions, which is why we've designed the Wallet to be the ultimate user-friendly platform for managing finances. No need to open a traditional bank account or wrestle with convoluted crypto exchanges and wallets.
Leveraging the power of advanced blockchain technology, Wallet delivers a seamless onboarding experience into the crypto ecosystem. It enables users to effortlessly store, send, and receive digital currencies, all via the familiar interface of Telegram. Managing your finances becomes as simple as sending a message.
At Wallet, we're committed to using technology to disrupt traditional banking systems, providing our customers with more flexible and inclusive financial services. Whether you're a crypto novice or seeking to simplify your digital finance experience, Wallet is crafted with your needs in mind.
We are looking for a Software Engineer (Platform) to join our team and help build and support high-load systems. Your main responsibility will be to create scalable and fault-tolerant solutions that ensure the platform's stability under heavy loads.
Responsibilities:
Develop and maintain high-load platform solutions.
Ensure the scalability and fault tolerance of services.
Optimize system performance to handle large amounts of data and users.
Collaborate with cross-functional teams to deliver the best platform engineering solutions.
Integrate with monitoring and alerting systems for timely detection and resolution of issues.
Participate in the design and implementation of new features.
 
Requirements:
5+ years of experience as a Software Engineer.
Understanding of distributed systems principles.
Proficiency in one or more programming languages (Go, Java, C++) and desire to write on Python or Kotlin.
Solid understanding of databases (SQL, NoSQL), query optimization, and handling large datasets.
Experience with monitoring, logging and distributed tracing tools.
 
Nice to Have:
Experience with microservices architecture.
Experience with containerization and orchestration tools (Kubernetes, Docker).
Familiarity with DevOps practices and experience implementing them.
 
Why it is a fantastic opportunity:
Our business is growing at an exponential scale.
Work in a well-funded startup environment with unique growth opportunities and a chance to join a rapidly growing company with a unique product.
Be based remotely.
Participation in the performance review and bonus programme.
Compensation for medical expenses.
Provision of necessary equipment.
Annual vacation of 20 working days plus 10 paid days off.
14 days of paid sick leave to support your health and recovery when needed.
Access to internal English courses for continuous learning and improvement in language skills.

Wallet in Telegram is your gateway to the world of digital currencies, specially tailored for individuals in emerging markets. We understand the complexities and intimidation often associated with existing crypto solutions, which is why we've designed the Wallet to be the ultimate user-friendly platform for managing finances. No need to open a traditional bank account or wrestle with convoluted crypto exchanges and wallets.
Leveraging the power of advanced blockchain technology, Wallet delivers a seamless onboarding experience into the crypto ecosystem. It enables users to effortlessly store, send, and receive digital currencies, all via the familiar interface of Telegram. Managing your finances becomes as simple as sending a message.
At Wallet, we're committed to using technology to disrupt traditional banking systems, providing our customers with more flexible and inclusive financial services. Whether you're a crypto novice or seeking to simplify your digital finance experience, Wallet is crafted with your needs in mind.
We are looking for a Software Engineer (Platform) to join our team and help build and support high-load systems. Your main responsibility will be to create scalable and fault-tolerant solutions that ensure the platform's stability under heavy loads.
Responsibilities:
Develop and maintain high-load platform solutions.
Ensure the scalability and fault tolerance of services.
Optimize system performance to handle large amounts of data and users.
Collaborate with cross-functional teams to deliver the best platform engineering solutions.
Integrate with monitoring and alerting systems for timely detection and resolution of issues.
Participate in the design and implementation of new features.
Requirements:
5+ years of experience as a Software Engineer.
Understanding of distributed systems principles.
Proficiency in one or more programming languages (Go, Java, C++) and desire to write on Python or Kotlin.
Solid understanding of databases (SQL, NoSQL), query optimization, and handling large datasets.
Experience with monitoring, logging and distributed tracing tools.
Nice to Have:
Experience with microservices architecture.
Experience with containerization and orchestration tools (Kubernetes, Docker).
Familiarity with DevOps practices and experience implementing them.
Why it is a fantastic opportunity:
Our business is growing at an exponential scale.
Work in a well-funded startup environment with unique growth opportunities and a chance to join a rapidly growing company with a unique product.
Be based remotely.
Participation in the performance review and bonus programme.
Compensation for medical expenses.
Provision of necessary equipment.
Annual vacation of 20 working days plus 10 paid days off.
14 days of paid sick leave to support your health and recovery when needed.
Access to internal English courses for continuous learning and improvement in language skills.
Wallet is an equal opportunity employer.

We are looking for three experienced Senior Web3 Developers to join our team. You will be responsible for developing and maintaining our EVM chain-based Dapps and websites, ensuring they are secure, functional, and aligned with best practices. This is an exciting opportunity to work on cutting-edge blockchain projects in a collaborative environment.
Key Responsibilities:
•Development: Design, develop, and maintain Web3 applications using React, Node.js, and Solidity.
•Smart Contracts: Write, test, and deploy smart contracts on Ethereum and other major blockchain platforms (e.g., Binance Smart Chain, Polygon).
•Full-Stack Development: Work on both frontend and backend components to ensure seamless integration and performance.
•Collaboration: Collaborate with cross-functional teams to define, design, and ship new features.
•Code Review: Conduct code reviews to maintain code quality and share knowledge with the team.
•Security: Implement security best practices to protect our applications from common Web3 vulnerabilities.
Required Technical Skills:
•Extensive experience with Web3 technologies, including React, Node.js, and Solidity.
•Strong understanding of Ethereum and other major blockchain platforms.
•Proficiency in smart contract development and deployment.
•Experience with full-stack development, including frontend and backend integration.
•Familiarity with common Web3 vulnerabilities and security best practices.
•Strong skills in using Git for version control and collaboration.
Preferred Qualifications:
•Proven track record of developing and deploying Web3 applications.
•Experience with decentralized finance (DeFi) protocols.
•Excellent problem-solving skills and attention to detail.
•Strong communication skills for effective collaboration and reporting.
Project Details:
•Type: Full-time positions with potential for long-term engagement.
•Confidentiality: Non-disclosure agreements (NDAs) will be required to protect sensitive project information.
How to Apply:
If you are a passionate Web3 developer with a strong background in full-stack development, we would love to hear from you. Please submit your application including:
•A brief overview of your experience in Web3 and full-stack development.
•Examples of previous projects or related work.
•Your proposed rate and availability.
Looking forward to your reply.
Best Regards