COCA is at the forefront of the financial revolution, seamlessly integrating blockchain technology with everyday financial transactions through its innovative non-custodial wallet and debit card solutions. With a clear vision to make cryptocurrency as straightforward and widely accepted as traditional fiat currency, COCA is paving the way for a new era in the financial industry.
Key Value Propositions
- Non-Custodial Security: COCA employs MPC technology to eliminate the traditional vulnerabilities associated with private keys, enhancing user control and security.
- Global Accessibility: COCA’s debit cards are accepted by over 40 million merchants worldwide, making it easy for users to spend their crypto just like fiat money.
- Seamless Integration: The COCA wallet integrates with major mobile payment systems like Apple Pay and Google Pay, providing a frictionless transaction experience.
- Comprehensive Financial Tools: From real-time crypto-fiat exchanges to offering rewards, COCA offers a range of services that cater to all user needs in one platform.
Traction to Date
Since its launch, COCA has experienced exponential growth, now supporting over 700,000 wallets across more than 50 countries within just six months of operation. The platform has witnessed a 156% growth in user base in the second quarter alone, demonstrating significant market demand and user trust.
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· 178 views · 63 applications · 4d
Senior .Net Back-end Developer Fintech Web3 ( FinTech experience mandatory)
Full Remote · Countries of Europe or Ukraine · Product · 5 years of experience · B1 - IntermediateB2B Contract Fully remote Mandatory experience working in the FinTech domain. As a team member, you'll be involved in: Designing and implementing event‑driven and microservice-based architectures using modern .NET technologies. Building and...B2B Contract
Fully remote
Mandatory experience working in the FinTech domain.As a team member, you'll be involved in:
Designing and implementing event‑driven and microservice-based architectures using modern .NET technologies.
Building and maintaining RESTful APIs and background services for real-time financial operations.
Participating in Agile ceremonies (grooming, planning, estimation, retrospectives) with product, QA, and DevOps teams.
Taking ownership of features from concept to production—including architecture, testing, and monitoring.
Proactively refactoring legacy components and evolving the platform architecture for scalability, security, and maintainability.
Translating product and compliance requirements into robust unit, integration, and end‑to‑end test coverage.
Contributing to code reviews, CI/CD workflows, documentation, and team knowledge sharing.
Requirements:
Mandatory experience working in the FinTech domain.
5+ years of commercial experience with .NET/C# in production systems.
Hands-on experience with .NET Core 3.1+ / .NET 6+, ASP.NET Core Web API, and background services.
Strong understanding of distributed systems and event-driven architecture.
Practical knowledge of multithreading, async/await, and designing resilient, high-load systems.
Experience with MSSQL, Redis, data caching, transactions, and query optimization.
Understanding of message orchestration patterns (saga, idempotency, DLQ).
Solid knowledge of SOLID principles, clean code practices, and design patterns.
Good English for documentation; Ukrainian or Russian for team communication.
Nice to Have:
Experience deploying and running services in a cloud environment; familiarity with containerization (Docker) and CI/CD pipelines.
Experience with Azure services (Azure Functions, Service Bus, Cosmos DB, Key Vault, etc.).
Familiarity with Kafka/Azure EventHubs, gRPC, or message queues (RabbitMQ, Azure Service Bus).
Experience with observability and monitoring tools (App Insights, Prometheus, OpenTelemetry).
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· 62 views · 26 applications · 3d
Senior React Native Engineer FinTech WEB3 ( FinTech experience mandatory)
Full Remote · Worldwide · Product · 5 years of experience · B1 - IntermediateType of Cooperation: B2B Contract. Timeline: Start as soon as possible, MVP in 3–6 months. The Role We're seeking a skilled Senior React Native Developer to join our mobile team and help build our iOS/Android applications from scratch. You'll be...Type of Cooperation: B2B Contract.
Timeline: Start as soon as possible, MVP in 3–6 months.
The Role
We're seeking a skilled Senior React Native Developer to join our mobile team and help build our iOS/Android applications from scratch. You'll be focusing on delivering high-quality features while reusing core logic from our web platform. This is a fast-paced, high-impact position where you'll contribute to delivering an MVP in 3–6 months.
Key Responsibilities:
— Build & Architect: Develop React Native apps for iOS/Android, establishing architecture and coding standards.
— Integrate Web3: Implement interactions with wallets and smart contract for crypto transactions.
— Reuse & Optimize: Leverage existing TypeScript/React services while building mobile-specific UI/UX.
— Collaborate: Work daily with backend, web, and product teams to deliver features rapidly.
— Ensure Quality: Implement testing strategies, CI/CD, and maintain high code standards under tight deadlines.
Requirements:
— 7+ years software development experience.
— 5+ years, React Native with apps published on both stores.
— Strong TypeScript/JavaScript (ES6+) expertise.
— Experience with state management (Redux, Zustend).
— Proven ability to deliver quality code under tight deadlines.
— Product mindset— suggest optimal technical and UX/UI solutions.
— Good English for documentation, Ukrainian or Russian communication skills.Nice to Have:
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— Web3 experience (viem, ethers.js zerodev, WalletConnect).
— Cryptocurrency wallet or payment app development.
— Knowledge of smart contracts and blockchain basics.