Senior Backend Developer

Wizzer AdvisorTech Pvt Ltd.; Mumbai; On-site; Full time

Job description

Wizzer is a quant-driven investment platform that builds portfolios based on risk profiles, dynamically rebalancing them to market conditions while leveraging sectoral rotations and alpha strategies for enhanced returns. Focused on quantitative investment and trading, Wizzer ensures portfolios consistently outperform benchmarks, offering a seamless multi-asset investment experience—all within a single account.

About the team

Our Engineering team builds and optimizes the core infrastructure of Wizzer. They focus on scalability, security, and seamless integrations, ensuring our platform remains robust and efficient. From backend architecture to frontend interfaces, data pipelines to real-time processing, they bring Wizzer’s vision to life through innovation and technical excellence.

About the role

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 Node.js 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.

At Wizzer, we're looking for people with passion, grit, and integrity. You’re encouraged to apply even if your experience doesn’t precisely match the job description. Your skills and passion will stand out—and set you apart—especially if your career has taken some extraordinary twists and turns.

At Wizzer, we welcome diverse perspectives and people who think rigorously and aren’t afraid to challenge assumptions. Join us.