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Mid / Senior Backend JS Developer

Digital Unicorn

DIGITAL UNICORN



📍 Location: 3F, 94 Ho Nghinh Street, An Hai Bac Ward, Son Tra District, Da Nang City

🌐 Website: https://digitalunicorn.fr

đŸ“© Email: hi@digitalunicorn.fr

📞 Phone: 02363 57 57 45

WHO ARE WE?

Digital Unicorn is a French digital agency with a passionate and ambitious team. We specialize in:

- Mobile Application Development

- Website Development

- AI/Deep Learning

- UX/UI Design

We’re more than just a company — we’re a small hub for those who want to step into an international working environment. Here, you’ll train, work, and build your career foundation, all while growing friendships that last.


At Digital Unicorn:

We share and support each other

We build meaningful products for startups

We create a space where you can enjoy working and growing


WE ARE HIRING: 


SENIOR BACKEND JAVASCRIPT DEVELOPER

CORE REQUIREMENTS

Experience: 5+ years in backend JavaScript development with enterprise-level applications

Hard Skills:

  • JavaScript Core: Expert-level ES6+, async/await, closures, prototypes, event loop
  • Node.js: Advanced Node.js runtime, NPM ecosystem, performance optimization
  • Frameworks: Proficient in NestJS, Express.js
  • TypeScript: Strong typing, interfaces, generics, decorators
  • API Development: RESTful APIs, GraphQL, WebSocket, microservices architecture
  • Authentication: JWT, OAuth 2.0, passport.js, session management
  • AI integration  is ++

Database Expertise:

  • SQL: Advanced PostgreSQL/MySQL, complex queries, indexing, performance tuning
  • NoSQL: MongoDB, DynamoDB, document design, aggregation pipelines
  • Cache: Redis implementation, caching strategies, session storage
  • ORM/ODM: Prisma, TypeORM, Sequelize, Mongoose

KEY RESPONSIBILITIES

  • Design and develop scalable backend systems and APIs
  • Architect database schemas and optimize query performance
  • Implement caching strategies using Redis for high-traffic applications
  • Build real-time features using WebSocket and event-driven architecture
  • Integrate third-party services and payment gateways
  • Mentor junior developers and establish coding standards
  • Collaborate with frontend teams and DevOps for seamless deployment

TECHNICAL EXPERTISE

Performance & Scalability:

  • Load balancing and horizontal scaling strategies
  • Database sharding and replication
  • Memory management and garbage collection optimization
  • API rate limiting and throttling

Security:

  • Input validation and sanitization
  • SQL injection and XSS prevention
  • Secure authentication and authorization
  • Data encryption and HTTPS implementation

PREFERRED QUALIFICATIONS

  • Experience with event-driven architecture and CQRS pattern
  • Knowledge of Apache Kafka or similar message brokers
  • Familiarity with monitoring tools (New Relic, DataDog)
  • Experience with serverless architecture (AWS Lambda, Vercel)
  • Understanding of blockchain/Web3 development
  • Microservices design and implementation experience

 

What We Offer:

  • Product-led company with a focus on quality and user-centric solutions
  • Project ownership – make meaningful contributions from day one
  • Clear career growth opportunities and structured training policies
  • English-speaking environment with direct client exposure
  • Immersive English environment to develop international communication skills
  • Competitive salary & bonus, aligned with your skills and experience
  • 100% salary during the probation period
  • Insurance coverage according to local regulations
  • All necessary devices provided for work
  • Dynamic, comfortable, and creative working environment
  • Team building events & company trips every year
  • Snacks and fresh fruits always available for your break times
  • Sports & wellness activities to recharge and boost energy


Feel free to reach out to hi@digitalunicorn.fr if you’d like to discuss further.


Thank you!

--Digital Unicorn--
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