Senior Backend Developer

2 days ago


Mumbai, Maharashtra, India Wizzer AdvisorTech Full time ₹ 15,00,000 - ₹ 25,00,000 per year

Wizzer is seeking a Senior Backend Engineer who thrives on building scalable systems and shaping the future of a high-growth WealthTech platform. In this role, you will contribute to mission-critical backend services that power our investment platform, trading systems, and client-facing applications. You'll be a key contributor from inception to deployment, with hands-on ownership of architecture, implementation, release cycles, and operational monitoring. You'll collaborate closely with product, frontend, and infrastructure teams, making key decisions in the backend architecture and mentoring junior engineers. This is a high-impact role for someone looking to grow within a fast-paced, collaborative, and technically challenging environment.

Key responsibilities

  • System Ownership: Lead the design and implementation of backend services and APIs that are robust, scalable, and secure.
  • Technical Execution: Identify system bottlenecks and performance issues and implement optimizations as we scale.
  • Cross-functional Collaboration: Work closely with Product Managers, Architects, and Engineers to translate business requirements into technical solutions.
  • Mentorship: Guide junior developers and promote best practices in backend development and system design.
  • Operational Excellence: Improve reliability, observability, and documentation across services; actively contribute to incident handling and resolution.
  • Tooling & Standards: Promote modern tooling and advocate for improved development experience and productivity through automation and continuous integration.
  • Documentation: Participate in and contribute to writing RFCs, architecture diagrams, and technical documentation.

Required qualifications

  • Minimum 3 years of hands-on experience in backend development beyond academic or internship settings.
  • Strong proficiency in and TypeScript, including experience working with frameworks such as Loopback, NestJS, or Fastify.
  • Deep understanding of REST API design and best practices.
  • Solid knowledge of backend infrastructure concepts such as authentication, authorization, rate-limiting, and caching.
  • Strong grounding in data structures, algorithms, and software architecture.
  • Excellent debugging, problem-solving, and communication skills.

Tech stack

Backend:

  • Languages:
     NodeJS, TypeScript
  • Databases:
     MongoDB, PostgreSQL (Bonus)
  • Frameworks:
     Loopback, NestJS, Fastify
  • WebSockets & Middleware:
     , KrakenD
  • Workflow Engines / Pipelines:
     Airflow, Cadence (or equivalent)
  • Infrastructure / DevOps:
  • Cloud Platforms:
     AWS (ECS, EC2, ELB, Route53, S3, Lambda, CloudFront, ACM, Parameter Store), Digital Ocean
  • Containerization & Provisioning:
     Docker, Terraform
  • Source Control & CI/CD:
     Bitbucket, Bitbucket Pipeline
  • Monitoring, Debugging & Testing:
  • Monitoring & Debugging:
     LogRocket
  • Testing & API Documentation:
     Stoplight, Testiny,
  • Documentation Process:
     RFC-based for Architecture & Design
  • Project Management Tools:
     JIRA

Who can apply?

  • You have 3+ years of strong backend development experience and are confident in building scalable systems.
  • You're comfortable taking ownership of backend architecture and collaborating with product and design teams.
  • You've worked with one or more parts of our stack or you're confident and eager to learn the ones you haven't.
  • You care about clean, maintainable, and well-documented code.
  • You are passionate about technology, systems thinking, and solving real-world problems.
  • You're excited by the opportunity to work on cutting-edge WealthTech products in a collaborative and fast-growing startup environment in Mumbai.


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