Senior Full-Stack Developer

18 hours ago


Mumbai, Maharashtra, India LvlUp Labz Full time ₹ 8,00,000 - ₹ 24,00,000 per year

Company Description

LvlUp Labz, a Mumbai-based software development agency, partners with innovative businesses to build custom applications, platforms, and systems that drive real results. The company specializes in creating custom web and mobile applications, fintech solutions, SaaS platforms, and API development. Serving industries such as fintech, e-commerce, iGaming, and healthcare technology, LvlUp Labz is expanding its engineering team to work on exciting projects, including a real-time betting exchange platform for an international iGaming client, alongside fintech applications and SaaS solutions.

Role Description

This is a full-time on-site role for a Senior Full-Stack Developer (Backend Focus) located in Mumbai. You'll architect and build microservices for a iGaming platform, handling real-time odds updates, high-frequency transaction processing, and event streaming infrastructure. While your primary focus is backend systems, you'll collaborate with frontend developers and contribute to React code when needed.

What You'll Do

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Design and build microservices for bet placement, settlement, and real-time odds processing

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Architect WebSocket infrastructure for live betting updates using

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Implement Kafka event streaming for high-frequency transaction processing

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Optimize PostgreSQL queries for sub-100ms response times at scale

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Build REST APIs and integrate with third-party betting data providers

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Review and contribute to frontend code when needed

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Deploy and monitor production systems using Docker and AWS

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Mentor junior developers on backend architecture and best practices

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Collaborate with cross-functional teams in an agile environment

Work Style

We practice "Vibe Coding"—using AI coding tools (Cursor, Claude Code, GitHub Copilot) daily to accelerate development and focus on solving complex problems rather than repetitive tasks. If you're already using these tools, great. If not, you'll learn quickly.

Qualifications

Required:

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4-6 years of professional experience in full-stack development

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Strong expertise in (Express, ) and backend architecture

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Proficiency in modern technologies: React, , TypeScript

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Experience with microservices architecture and API design

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Real-time systems experience (WebSocket, , or similar)

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Message queue knowledge (Kafka, RabbitMQ, Redis Streams)

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Strong PostgreSQL skills (query optimization, indexing, transactions)

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Experience with Docker and AWS cloud services

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Excellent problem-solving and communication skills

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Bachelor's degree in Computer Science, Engineering, or related field

Nice to Have:

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Experience in fintech, iGaming, or high-frequency trading platforms

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Prisma ORM or TypeORM experience

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Redis caching strategies for real-time applications

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Kubernetes deployment experience

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Understanding of betting/gaming platform mechanics

Our Tech Stack

**Backend:**
, Express, Prisma ORM, PostgreSQL (TimescaleDB), , Kafka, Redis

**Frontend:**
React 19, 15, TypeScript, Redux Toolkit

**Infrastructure:**
Docker, Kubernetes, AWS, Nginx, Prometheus, Grafana

Ready to build high-performance betting systems with modern technology?

We're reviewing applications daily and moving fast on qualified candidates.



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