NodeJS Developer at vSplash Techlabs · Remote, Hyderabad, Vijayawada, Visakhapatnam · 2 - 4 years · ₹5L - ₹8L / yr · Profitable · Remote friendly · Posted 26 May 2022

Prefer Immediate Joiners with Node experience only
Minimum 2 Years of experience in NodeJS. Minimum 1 Year experience in MongoDB Minimum 1 Year of experience in ElasticSearch.

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Senior Backend Engineer
Node.js, System Design & Production Platforms
📍 Mumbai (On-site) | Full-time | 5+ years
About the Role:
Unico Connect is an AI-first technology partner that builds custom mobile, web, and AI products for clients across multiple geographies.
We are hiring a Senior Backend Engineer to own the backend architecture of a complex production AI platform on a dedicated client engagement: API design and data modelling, multi-tenancy, orchestration of long-running agent workloads, and the services that manage user projects and generated output.
We are open to full stack engineers whose primary strength and interest is backend. If you have shipped full stack work but the backend is where you do your deepest engineering, you are a fit for this role.
The mandatory requirement for this role is hands-on production experience as a senior backend engineer building complex, scalable systems in Node.js, with end-to-end ownership of architecture, data, and operations on at least one live platform.
The role is hands-on and architectural.
Expect to design system architecture, lead a small group of backend engineers, build the hardest parts yourself, set engineering standards, and partner closely with frontend, AI, and DevOps engineers.
A typical week includes an architecture decision on a new service, hands-on implementation of a critical path, a code review with mid-level engineers, and a working session with the AI engineer on an integration contract.
Responsibilities:
System Architecture
Own the backend architecture across engagements.
Make and document decisions on service boundaries, data models, API contracts, deployment topology, and trade-offs.
Hands-on Backend Delivery
Lead by example on complex modules, performance-critical paths, and high-risk areas using Node.js (Express, NestJS, Fastify) with TypeScript.
Pick up Python (FastAPI) where engagements require it.
Database Design and Performance
Drive PostgreSQL schema design, indexing, query optimisation, migrations, and capacity planning.
Set the data-modelling standard across the pod.
Caching, Queues, and Workflows
Design caching (Redis), event-driven patterns (Kafka, RabbitMQ, SQS, NATS), and long-running workflow orchestration (Temporal, BullMQ, Celery, or equivalent).
Handle retries, idempotency, and failure recovery.
Multi-Tenancy and Platform Patterns
Design and implement multi-tenant data isolation, RBAC, audit logging, and resource quotas appropriate to enterprise-grade products.
API and Integration Design
Set the standard for REST, GraphQL, and gRPC contracts.
Drive versioning, authentication (OAuth, JWT, SSO), security by default, and developer ergonomics.
Observability and Operations
Instrument services with OpenTelemetry, Prometheus, and Grafana.
Define SLOs, lead incident response, and write postmortems.
Code Quality and Mentorship
Run code reviews, define conventions, mentor mid-level engineers, and raise the engineering bar.
AI-Assisted Engineering Discipline
Use Claude, Cursor, and similar tools day to day.
Set the team standard for prompts, patterns, AI-assisted review, and validation of AI-generated backend code.
Client Engagement
Represent Unico Connect in technical conversations with customers.
Defend architectural decisions, communicate trade-offs, and manage scope.
Requirements:
Hands-on Production Experience as a Senior or Lead Backend Engineer in Node.js (Mandatory)
Must have personally built and shipped complex production systems in Node.js, owning architecture, data, and operations on at least one live engagement.
Full stack engineers whose deepest work is on the backend qualify.
POCs and internal tools alone do not qualify.
5+ Years of Professional Backend Engineering Experience
With at least 1 to 2 years in a senior or lead role with direct responsibility for technical decisions and team output.
Deep Node.js and TypeScript Proficiency
Strong with Express, NestJS, or Fastify.
Comfort with async patterns, streams, worker threads, and performance profiling.
Python as a Strong Plus
Hands-on production experience with FastAPI, Django, or Flask is a meaningful advantage.
Willingness and demonstrated ability to pick up Python as engagements demand is required.
PostgreSQL Depth
Schema design, normalisation, indexing, query performance, migrations, and at least one production system where you owned the data model end to end.
Caching and Event-Driven Architecture
Hands-on with Redis (or equivalent) and message queues or event-driven patterns (RabbitMQ, SQS, Kafka, NATS).
AWS Depth
Hands-on production experience with EC2, S3, RDS, IAM, VPC, ECR, and at least one of EKS, ECS, or Lambda.
Comfort owning deployment, monitoring, and cost.
System Design and End-to-End Ownership
Able to take an ambiguous problem, break it into components, evaluate alternatives, produce an architecture that holds up under review and load, plan execution, and ship with limited supervision.
AI-Assisted Engineering Experience
Daily use of Claude, Cursor, Copilot, or equivalent.
Strong discipline for reviewing and validating AI-generated backend code.
Excellent Written and Spoken English
Experience working directly with international clients.
Confident defending architectural choices in writing and in review.
Nice to Have:
- Workflow orchestration (Temporal, Airflow)
- GraphQL (Apollo, gRPC)
- Sandboxed execution environments
- Multi-tenant SaaS experience
- OpenTelemetry instrumentation
- Prior agency or consulting experience

We’re in search of a Back-End Software Engineer that specializes in server-side components. In this role,
you’ll primarily work on Node JS, Mongo DB, Redis, building scalable products and will bring a depth of
knowledge on algorithms and data structures. As a Back-End Software Engineer, on any given day you
might be architecting new features for our customers, refactoring existing code to be more scalable, and
seeing changes through to completion in a live environment.
Key Attributes you need to possess: -
- Prioritization- Should have a strong work ethics and show up on time at sessions with excellent skills
in predicting the amount of time needed to plan, coordinate, and perform on a task or managing their
clients as and when required.
- Quick Learning Ability- You should be an amazing self-learner who has the ability to learn new
technology on their own and are not threatened by new technologies. Someone who has an ability to pull
various bits of information and to process information on the fly with good logical and analytical skills.
- Deep and Broad Technical Experience- Someone who is able to hit the ground because they already
know the right technology.They should be able to meet coding principles and write code that is readable
and commented-on where appropriate.Through incorporating their cognitive abilities and extensive
industry experience, they are able to find optimal solutions easily.
- High-End User Focus-A good programmer does what they are asked to do, while a great programmer
thinks of the end user of the software and works to solve problems within the organization’s
capabilities.Someone who knows the functionality they’re creating is of high value.
-Business Acumen- Should have a great eye for Business acumen as the product build will be exposed to
millions of customers on-brand digital assets hence giving you exposure for handling a large user base in
a live environment.
-Teamplayer- Someone who is able to work in a challenging environment and requires complete
devotion, persistence and learning new things every day. As they will be involved in every fact of the
product development starting from product ideation, Interface design, user experience, analytics, and
engineering.
Typical work week look like:-
- Collaborating with the front-end developers and other team members to establish objectives and design
more functional, cohesive codes to enhance the user experience.
- Design and implementation of scalable applications by using asynchronous programming with
low-latency, high-availability, and performant applications between multiple systems, servers, and
environments.
-Integration of data storage solutions by creating database schemas that represent and support business
processes and also Integrating multiple data sources and databases into one system.
- Building reusable code and libraries for future use.
- Explore technical innovation and propose new solutions as and when required.
- Work with engineers, product managers and senior leadership to turn our product and technical vision
into a tangible roadmap every month.
Our ideal candidate should have:-
- 2+ years of relevant experience in a Tech Startup
- A solid grounding in Computer Science fundamentals (based on a BE/BTech or MS in Information
Technologies/Computer Science)
- Strong proficiency with JavaScript and knowledge of Node.js and frameworks.
- Strong hands on MongoDB and ability to write aggregation queries.
- Basic understanding of front-end technologies, such as HTML5, and CSS3.
- Hands-on on code versioning tools, such as Git, Redis, AWS, Sockets
The Role:
You are a Backend Engineer passionate about building world-class mobile and web applications with performant backend and glitch-free experience. You will be part of a team which will be delivering technology that enhances the in-app experience for our users and enables our development teams to build mobile apps easier, faster and more efficient. You will build compelling and engaging applications for Web and Mobile platforms. Employing your experience in latest Nodejs frameworks like Express.js,Hapi.js, Yarn, PM2 and proficiency in Elasticsearch, in building RESTful APIs, in integrating with databases like MongoDB and MySQL/Postgres with discipline in collaboration and pair programming. Our clientele majorly comprises of BFSI companies, so experience in Financial Applications and enterprise data security will be a big-plus.
Responsibilities:
• Contribute to an Agile team to build web and mobile applications, APIs, SDKs and other tools as required
• Collaborate with various teams within IORTA to realize the requirements for the project and Rapidly deliver iterative solutions
• Provide task plans and follow trends in technology and suggest new approaches to application design and development
• Review and evaluate designs for compliance with development guidelines
•. Implement best practices and methods to improve the development process within the
team and organization
You will get to design, architect and develop complex enterprise software and SaaS web applications leveraging modern web stack.
Roles & Responsibilities
Design & build highly scalable, high performance, responsive web applications.
Take full ownership and responsibility for building, shipping, and maintaining core product features, end to end. Help out in building the backend & front-end infrastructure.
Translation of requirements, designs and wireframes into high quality code. Collaborate closely with designers, engineers, founders and product managers.
Mentor team members and review their work.
You will enjoy this role if you...
Are a geek with a desire to stay ahead of the curve.
Like building beautiful well-architected software products with millions of users.
Work collaboratively as part of a close-knit team of geeks, architects and leads.
Desired Skills & Experience:
2 - 6 years of production experience with modern web frameworks - Ruby on Rails, Phoenix/Elixir and/or Django/Python.
Should have sound experience in developing scalable / distributed SaaS apps
Should have good knowledge and work experience in REST API implementations, JSON format handling, caching, sessions, multi-threading, etc.
Should be comfortable with database schema design and leveraging SQL & NoSQL (PostgreSQL, MySQL, Redis, Elasticsearch, DynamoDB)
Experience developing, consuming and transforming internal and 3rd party API's (REST and GraphQL)
Experience with code quality and reusability practices (CI/CD for back-end & front-end repos)
Solid foundation in data structures, algorithms, distributed systems, design patterns.
Strong understanding of software engineering best practices, including unit testing, code reviews, design documentation, debugging, troubleshooting, and agile development
Communication: You like discussing a plan upfront, welcome collaboration, and are an excellent verbal and written communicator.
Bachelor’s degree in Computer Science or equivalent experience.
Bonus points if you have...
Exposure to front-end technologies like React/Redux, Javascript/Typescript etc.
Cloud native development on AWS or GCP
Experience with implementation of container technologies like Docker, Kubernetes. Knowledge of continuous integration, continuous delivery and enterprise DevOps concepts.
1. Ability to work in a fast-paced environment with minimal supervision
2. Experience in Agile development using JIRA, GIT, Confluence.
3. 3+ years of Experience in node.js + Express.
4. Experience in profiling, debugging & troubleshooting Node.js processes.
5. Strong Experience as a backend developer for REST API design.
6. Strong knowledge of SQL/NoSQLdatabases like PostgreSQL / MySQL or MongoDB
7. Understanding accessibility and security compliance
8. Understanding fundamental design principles behind a scalable application.
9. User authentication and authorization between multiple systems, servers, and
environments.
- Develop, record and maintain cutting edge web-based PHP applications on portal plus premium service platforms
- Build innovative, state-of-the-art applications and collaborate with the User Experience (UX) team
- Ensure HTML, CSS, and shared JavaScript is valid and consistent across applications
- Prepare and maintain all applications utilizing standard development tools
- Utilize backend data services and contribute to increase existing data services API
- Lead the entire web application development life cycle right from concept stage to delivery and post launch support
- Convey effectively with all task progress, evaluations, suggestions, schedules along with technical and process issues
- Document the development process, architecture, and standard components
- Coordinate with co-developers and keeps project manager well informed of the status of development effort and serves as liaison between development staff and project manager
- Keep abreast of new trends and best practices in web development









