Company: Eureka Stock & Share Broking Services Ltd.

Product: Infinity

Location: Kolkata

Experience: 5 to 8 Years

Open Positions: 1

About the Role

Eureka Stock & Share Broking Services Ltd. is looking for an experienced Senior Backend Engineer to drive backend development, technical architecture and platform engineering for Infinity, our investment and trading platform.

In this role, you will take ownership of designing and developing scalable, secure and high-performance backend systems. You will contribute to key architectural and technology decisions, work on complex financial integrations, establish engineering best practices and collaborate closely with product, design and engineering teams.

You will also play an important role in mentoring engineers, reviewing technical implementations and contributing to the growth of the engineering team as the platform evolves.

We are looking for someone with strong backend engineering fundamentals, hands-on experience building production systems and the ability to independently solve complex technical challenges.

Key Responsibilities

1. Backend Architecture & Technical Design

- Design and develop scalable, secure and maintainable backend systems for Infinity.
- Evaluate existing applications, infrastructure and integrations to identify opportunities for improvement.
- Contribute to architectural decisions around backend services, databases, APIs, caching and system integrations.
- Define and maintain engineering standards, coding practices and architectural guidelines.
- Ensure systems are designed for performance, reliability and scalability.

1. Backend Development & Integrations

- Lead the development of backend services, REST APIs, WebSockets and microservices.
- Build and maintain integrations with brokers, exchanges, market-data providers, financial services and third-party APIs/SDKs.
- Develop reliable financial workflows, including transaction processing, order management and real-time data handling.
- Drive database design, optimisation, caching strategies and query performance.




- Implement authentication, authorisation, encryption, access control and audit logging mechanisms.

1. Engineering Collaboration & Mentorship

- Work closely with frontend engineers, product managers and designers to translate product requirements into technical solutions.
- Review code, provide technical guidance and mentor junior engineers.
- Contribute to technical discussions, solution design and engineering planning.
- Identify technical risks and proactively recommend improvements.
- Participate in technical interviews and contribute to evaluating potential engineering hires.

1. Infrastructure, Reliability & Delivery

- Work with cloud infrastructure, deployment pipelines and CI/CD processes.
- Implement monitoring, logging and alerting to maintain application reliability.
- Identify and resolve performance bottlenecks and production issues.
- Ensure proper testing, documentation, code quality and release practices.
- Work with containerisation and deployment technologies such as Docker and Kubernetes.

1. AI & Emerging Technologies

- Contribute to the integration of AI-powered capabilities into Infinity and internal business workflows.
- Explore and implement backend integrations involving LLMs, AI agents and MCP-based tools.
- Build secure connections between AI systems, internal databases, APIs and business services.
- Collaborate with AI engineers to support reliable and scalable AI-powered applications.

Required Skills & Qualifications

- 5 to 8 years of experience in backend engineering or software development.
- Strong hands-on experience with at least one backend technology: Node.js, Python, Java or Go.




- Robust understanding of REST APIs, WebSockets, distributed systems and microservices architecture.
- Experience working with relational and NoSQL databases such as PostgreSQL, MySQL, MongoDB and Redis.
- Experience with cloud platforms such as AWS, Azure or GCP.
- Working knowledge of Docker, CI/CD, Git and production deployment practices.
- Strong understanding of application security, authentication, authorisation and API design.
- Experience integrating third-party APIs, SDKs or external services.
- Strong system-design, debugging and problem-solving skills.
- Ability to independently own technical tasks and collaborate effectively across teams.

Preferred Qualifications

- Experience in fintech, stockbroking, investment platforms, trading systems or other transaction-heavy applications.
- Exposure to broker/exchange integrations, market-data feeds, order-management systems or financial APIs.
- Experience building systems that handle real-time data, high transaction volumes and strict data-integrity requirements.
- Familiarity with messaging systems such as Kafka or RabbitMQ.
- Exposure to AI/LLM application architecture, MCP servers, tool calling or agent-based systems.
- Experience mentoring engineers or contributing to technical decision-making within an engineering team.

What We're Looking For

- A hands-on backend engineer who can independently design, build and maintain production-grade systems.
- Someone who takes ownership of technical challenges and drives them through to resolution.
- A strong problem-solver who can make pragmatic decisions around performance, scalability, reliability and cost.
- Someone comfortable working in a growing product environment and contributing beyond individual development tasks.
- A collaborative engineer who enjoys sharing knowledge, mentoring others and improving engineering practices.

Join Eureka and contribute to building the technology foundation behind Infinity, our investment and trading platform.

📌 Senior Backend Engineer (Kolkata)
🏢 Eureka Stock And Share Broking Services
📍 Kolkata