Principal Engineer(NodeJS)

Job Overview

Architect and build scalable, high-performance backend systems while working on mission-critical platforms that process real-time market data and portfolio analytics. The role also involves leveraging Generative AI capabilities to enhance data intelligence, automation, and user-facing features, while ensuring regulatory compliance and secure financial transactions.

Key Responsibilities

• Design, develop, and maintain scalable backend services and APIs using NodeJS and Python
• Build event-driven architectures using RabbitMQ and Kafka for real-time data processing
• Develop and manage data pipelines integrating PostgreSQL and BigQuery for analytics and warehousing
• Integrate and deploy Generative AI models (LLMs, embeddings, AI APIs) into backend systems for automation, insights, and intelligent workflows
• Design AI-powered features such as recommendation systems, document processing, or conversational interfaces
• Ensure system reliability, security, and low-latency performance for mission-critical systems
• Lead technical design discussions, conduct code reviews, and mentor junior engineers
• Optimize database queries, implement caching strategies, and improve overall system performance
• Collaborate with cross-functional teams to deliver end-to-end product features
• Implement monitoring, logging, and observability solutions

Required Skills and Qualifications

• 2+ years of professional backend development experience
• Strong expertise in NodeJS and Python for production-grade applications
• Proven experience building RESTful APIs and microservices architectures
• Experience working with Generative AI frameworks/APIs (OpenAI, LangChain, vector databases, prompt engineering)
• Understanding of integrating LLMs into production systems (RAG, embeddings, fine-tuning basics)
• Strong proficiency in PostgreSQL, including query optimization and schema design
• Hands-on experience with RabbitMQ and Kafka
• Experience with BigQuery or similar data warehousing solutions
• Solid understanding of distributed systems, scalability patterns, and high-traffic applications
• Strong knowledge of authentication, authorization, and security best practices
• Experience with Git, CI/CD pipelines, and modern development workflows
• Excellent problem-solving and debugging skills
• Exposure to fintech or financial services, cloud platforms (GCP/AWS/Azure), Docker/Kubernetes, caching tools (Redis/Memcached), and regulatory requirements (KYC, compliance, data privacy) is a plus

Apply directly at: https://wohlig.keka.com/careers/jobdetails/136351

Profile: 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫

Location: 𝐀𝐧𝐝𝐡𝐞𝐫𝐢 𝐄𝐚𝐬𝐭, 𝐌𝐮𝐦𝐛𝐚𝐢, 𝐌𝐚𝐡𝐚𝐫𝐚𝐬𝐡𝐭𝐫𝐚

Experience: 2+ 𝐘𝐞𝐚𝐫𝐬 𝐄𝐱𝐩

Work Mode: 𝐇𝐲𝐛𝐫𝐢𝐝

𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤:

✅ Node.js & Express.js

✅ MongoDB & Mongoose

✅ RESTful APIs & GraphQL

✅ JavaScript (ES6+) & TypeScript

✅ JWT Authentication

✅ Docker & Containerization

✅ Git Version Control

✅ Postman/Thunder Client

LambdaTest is a cloud-based testing platform aimed at bringing the whole testing ecosystem to cloud. LambdaTest provides access to a powerful cloud network of 2000+ real browsers and operating system that helps testers in cross-browser and crossplatform compatibility testing. The product roadmap is evolving and there are many more functionalities and features which will be added to the product. The company is backed by the Tier 1 VC funds and entrepreneurs of the industry. We are growing at a fantastic rate. This is an incredible opportunity for someone talented and ambitious to make a huge impact.

Role

• Develop & maintain shared APIs, libraries and frameworks
• Improve the performance and reliability of our services including databases, CI/CD pipeline, web services, and other integrations
• Monitor and scale our cloud infrastructure
• Collaborate with other teams on security, automation, and internal tools
• Evaluate and develop new tools and technologies that can help achieve company-level goals

Required Candidate profile

• 4 - 8 years of experience in Development.
• Should have good knowledge of backend Technologies like Python, Nodejs, Golang.
• Should have worked with Databases like Mysql, monogdb etc.
• Should have working experience in cloud environment.
• Engineering degree in computer science, engineering or related discipline from good institutes

• Participate in the entire application lifecycle, focusing on coding and debugging
• Write clean code to develop functional web applications
• Troubleshoot and debug applications
• Collaborate with Front-end developers to integrate user-facing elements with server-side logic
• Gather and address technical and design requirements
• Provide training and support to internal teams
• Build reusable code and libraries for future use
• Liaise with developers, designers to identify new features
• Follow emerging technologies

• Spent at least 1 yr in a solid back end role
• Experience taking a problem to a product solution (module/product)
• Prior experience working with startups and understanding the fast-paced, dynamic nature of work

• Javascript, NodeJS
• Client-server architecture
• OOP concepts, including design patterns
• Understanding of RDBMS (MySQL, Postgresql)
• Understanding of REST API
• Familiarity with frameworks such as ExpressJs

• Knowledge of TDD frameworks mocha, chai, jest, etc
• Knowledge of AWS (Lambda, RDS, EC2, SQS, S3, ECS, etc)
• Basic knowledge of Typescript, NextJs
• Prior experience in fin-tech

Diagnal Technologies is a fully owned subsidiary of Diagnal Inc, Hong Kong.  It’s a product company focusing on media and entertainment clients, creating Video on Demand apps for their customers. We are a team of OTT video solution specialists helping our customers build the new digital media industry in Asia Pacific and beyond. We create viable revenue generating video streaming products, enable our customers to gain business and operational insights through big data analytics and empower them to engage with their users more effectively through targeted marketing campaigns. Started its Development Center in Technopark Phase III campus and focusing on Indian and International clients.

For further details please refer our website

LinkedIN :

Job Description :

• 2 or more years of experience of server side web systems engineering and middleware in a project services or product engineering organisation
• Hands-on development experience using JavaScript on the Server Side with Node.js and associated frameworks.
• Published sites/systems that are now online
• Self motivation and ability to manage your own time to get the job done at the high international quality levels we expect
• An engineering Degree in computer science or equivalent practical experience
• A solid understanding of networking, storage, operating/browser systems engineering as well as application/software systems performance optimisation and third party systems integration
• Hands on experience with Amazon Web Services
• Prior experience working within the Media, E-commerce, Telecommunications or similar large scale consumer facing industry

First round will be a Machine test and Aptitude, sharing it with this mail, which has to be completed in 2 days.This will be followed by technical discussion, CEO round and HR discussion.Hiring process will take 5-7 working days post completion of M/C test