Senior Lead Engineer Backend

Weekday AI; Bengaluru; On-site; INR 7,500,000 - 9,900,000; Full time

Job summary

Weekday AI in Bengaluru, India is seeking a Principal Backend Engineer to lead architectural ownership, guide engineering teams, and drive robust backend solutions. You will work on scalable, low-latency systems using Python, Node.js, and/or Golang with MongoDB and other data stores.

The role emphasizes hands-on development, architecture decision-making, and mentoring across senior and junior engineers to deliver high-performance backend services for our clients.

Qualifications

• 13+ years in backend software engineering or large-scale apps.
• Deep expertise in microservices architectures and distributed systems.
• Strong skills in Python, Node.js and/or Golang, and MongoDB.

Responsibilities

• Design and implement low-latency, highly available backend applications.
• Own architecture and technical direction of modules and services.
• Develop microservices-based architectures for large-scale apps.
• Mentor senior and junior engineers and drive production readiness.

Skills

13+ years experience

microservices architectures

Python

Node.js

Golang

MongoDB

NoSQL

Distributed systems

API design

Leadership

Mentoring

Job description

𝗧𝗵𝗶𝘀 𝗿𝗼𝗹𝗲 𝗶𝘀 𝗳𝗼𝗿 𝗼𝗻𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗪𝗲𝗲𝗸𝗱𝗮𝘆'𝘀 𝗰𝗹𝗶𝗲𝗻𝘁𝘀

𝗦𝗮𝗹𝗮𝗿𝘆 𝗿𝗮𝗻𝗴𝗲: 𝗥𝘀 𝟳𝟱𝟬𝟬𝟬𝟬𝟬 - 𝗥𝘀 𝟹𝟦𝟢𝟢 𝟬? (i.e. INR 75-99 LPA)

Experience: 13+ yrs

Location: Bengaluru, Karnataka, India

Job Type: Full-time

We are looking for an accomplishedPrincipal Backend Engineerwith deep expertise inmicroservices, scalable backend architecture, low-latency systems, and high-performance application development. This role is suited for a senior technology professional who can combine hands‑on engineering with architectural ownership and technical leadership.

The ideal candidate will have strong expertise inPython, Node.js and/or Golang, MongoDB, distributed systems, algorithms, solution design, and scalable application architecture, with the ability to make critical technical decisions and guide engineering teams toward robust solutions.

Key Responsibilities

• Design and implementlow-latency, highly available, scalable, and high-performance backend applications.
• Own the architecture and technical direction of assigned modules and services.
• Design, develop, and evolvemicroservices-based architecturesfor large-scale applications.
• Write clean, reusable, testable, maintainable, and efficient production-grade code.
• Develop backend services usingPython, Node.js, Golang, or similar modern technologies.
• Design and implement APIs and server‑side application logic to support user‑facing products.
• Collaborate with frontend developers to integrate user‑facing components with robust server‑side services.
• Design and integrateMongoDB and other data-storage solutionsbased on application requirements.
• Integrate multiple data sources, databases, external services, and internal systems into scalable backend architectures.
• Evaluate system design choices with a focus on performance, scalability, reliability, maintainability, and cost.
• Apply strong algorithms, data structures, and problem‑solving approaches to complex engineering challenges.
• Make timely and pragmatic technical decisions while balancing product requirements and engineering constraints.
• Define and communicate technical approaches, architecture decisions, design principles, and implementation strategies to relevant stakeholders.
• Implement appropriatesecurity, data‑protection, authentication, authorisation, and compliance practices.
• Ensure backend systems follow scalable application and software‑design principles.
• Identify performance bottlenecks and drive optimisation across application and infrastructure layers.
• Establish coding standards, testing practices, design patterns, and engineering best practices.
• Conduct technical reviews and contribute to architecture discussions, code reviews, and engineering standards.
• Mentor senior and junior engineers and provide technical guidance on complex backend problems.
• Continuously evaluate technologies and approaches that can improve system performance, reliability, and developer productivity.

What Makes You a Great Fit

• 13+ years of experiencein backend software engineering, distributed systems, microservices, or large‑scale application development.
• Strong hands‑on experience designing and implementingmicroservices architectures.
• Deep expertise inPython, Node.js, and/or Golang.
• Strong experience withMongoDB and NoSQL database technologies.
• Excellent understanding of algorithms, data structures, solution architecture, and complex problem‑solving.
• Proven experience designingscalable, highly available, low-latency, and performance‑sensitive applications.
• Strong understanding of distributed systems, API design, service integration, and backend architecture.
• Experience integrating multiple data sources, databases, APIs, and external systems.
• Strong knowledge of fundamental software and system‑design principles for scalable applications.
• Experience with server‑side templating and CSS preprocessors is an advantage.
• Strong understanding ofapplication security, data protection, accessibility, and security compliance.
• Strong coding standards with a focus on reusable, testable, maintainable, and efficient software.
• Proven ability to take architectural ownership of modules and drive solutions from design through production.
• Excellent technical communication skills with the ability to articulate complex approaches to engineering and business stakeholders.
• Strong leadership, decision‑making, mentoring, and cross‑functional collaboration skills.
• Ability to balance hands‑on engineering with architecture, technical strategy, and team‑level influence.