Senior Software Engineer

Job Title : Node.js Developer

Experience : 3+ Years

Location : Gurgaon

Interview Rounds : 3

Mandatory Key Skills :

• Node.js, TypeScript
• PostgreSQL, MongoDB
• API Development, Microservices

Responsibilities :

• Develop and maintain scalable backend applications.
• Design and optimize database queries in PostgreSQL & MongoDB.
• Collaborate with cross-functional teams for seamless integration.

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

Job Summary:

Deqode is looking for a highly motivated and experienced Python + AWS Developer to join our growing technology team. This role demands hands-on experience in backend development, cloud infrastructure (AWS), containerization, automation, and client communication. The ideal candidate should be a self-starter with a strong technical foundation and a passion for delivering high-quality, scalable solutions in a client-facing environment.

Key Responsibilities:

• Design, develop, and deploy backend services and APIs using Python.
• Build and maintain scalable infrastructure on AWS (EC2, S3, Lambda, RDS, etc.).
• Automate deployments and infrastructure with Terraform and Jenkins/GitHub Actions.
• Implement containerized environments using Docker and manage orchestration via Kubernetes.
• Write automation and scripting solutions in Bash/Shell to streamline operations.
• Work with relational databases like MySQL and SQL, including query optimization.
• Collaborate directly with clients to understand requirements and provide technical solutions.
• Ensure system reliability, performance, and scalability across environments.

Required Skills:

• 3.5+ years of hands-on experience in Python development.
• Strong expertise in AWS services such as EC2, Lambda, S3, RDS, IAM, CloudWatch.
• Good understanding of Terraform or other Infrastructure as Code tools.
• Proficient with Docker and container orchestration using Kubernetes.
• Experience with CI/CD tools like Jenkins or GitHub Actions.
• Strong command of SQL/MySQL and scripting with Bash/Shell.
• Experience working with external clients or in client-facing roles.

Preferred Qualifications:

• AWS Certification (e.g., AWS Certified Developer or DevOps Engineer).
• Familiarity with Agile/Scrum methodologies.
• Strong analytical and problem-solving skills.
• Excellent communication and stakeholder management abilities.

Job Details

- Job Title: Senior Backend Engineer

- Industry: SAAS

- Function – Information Technology

- Experience Required: 5-8 years

- Working Days: 6 days a week, (5 days-in-office, Saturdays WFH)

- Employment Type: Full Time

- Job Location: Bangalore

- CTC Range: Best in Industry

Preferred Skills: AWS, NodeJS, RESTful APIs, NoSQL

Criteria

· Minimum 5+ years in backend engineering with strong system design expertise

· Experience building scalable systems from scratch

· Expert-level proficiency in Node.js

· Deep understanding of distributed systems

· Strong NoSQL design skills

· Hands-on AWS cloud experience

· Proven leadership and mentoring capability

· Preferred candidates from SAAS/Software/IT Services based startups or scaleup companies

Job Description

The Role:

What You’ll Build:

1. System Architecture & Design

● Architect highly scalable backend systems from the ground up

● Define technology choices: frameworks, databases, queues, caching layers

● Evaluate microservices vs monoliths based on product stage

● Design REST, GraphQL, and real-time WebSocket APIs

● Build event-driven systems for asynchronous processing

● Architect multi-tenant systems with strict data isolation

● Maintain architectural documentation and technical specs

2. Core Backend Services

● Build high-performance APIs for 3D content, XR experiences, analytics, and user interactions

● Create 3D asset processing pipelines for uploads, conversions, and optimization

● Develop distributed job workers for CPU/GPU-intensive tasks

● Build authentication/authorization systems (RBAC)

● Implement billing, subscription, and usage metering

● Build secure webhook systems and third-party integration APIs

● Create real-time collaboration features via WebSockets/SSE

3. Data Architecture & Databases

● Design scalable schemas for 3D metadata, XR sessions, and analytics

● Model complex product catalogs with variants and hierarchies

● Implement Redis-based caching strategies

● Build search and indexing systems (Elasticsearch/Algolia)

● Architect ETL pipelines and data warehouses

● Implement sharding, partitioning, and replication strategies

● Design backup, restore, and disaster recovery workflows

4. Scalability & Performance

● Build systems designed for 10x–100x traffic growth

● Implement load balancing, autoscaling, and distributed processing

● Optimize API response times and database performance

● Implement global CDN delivery for heavy 3D assets

● Build rate limiting, throttling, and backpressure mechanisms

● Optimize storage and retrieval of large 3D files

● Profile and improve CPU, memory, and network performance

5. Infrastructure & DevOps

● Architect AWS infrastructure (EC2, S3, Lambda, RDS, ElastiCache)

● Build CI/CD pipelines for automated deployments and rollbacks

● Use IaC tools (Terraform/CloudFormation) for infra provisioning

● Set up monitoring, logging, and alerting systems

● Use Docker + Kubernetes for container orchestration

● Implement security best practices for data, networks, and secrets

● Define disaster recovery and business continuity plans

6. Integration & APIs

● Build integrations with Shopify, WooCommerce, Magento

● Design webhook systems for real-time events

● Build SDKs, client libraries, and developer tools

● Integrate payment gateways (Stripe, Razorpay)

● Implement SSO and OAuth for enterprise customers

● Define API versioning and lifecycle/deprecation strategies

7. Data Processing & Analytics

● Build analytics pipelines for engagement, conversions, and XR performance

● Process high-volume event streams at scale

● Build data warehouses for BI and reporting

● Develop real-time dashboards and insights systems

● Implement analytics export pipelines and platform integrations

● Enable A/B testing and experimentation frameworks

● Build personalization and recommendation systems

Technical Stack:

1. Backend Languages & Frameworks 

●  Primary: Node.js (Express, NestJS), Python (FastAPI, Django)

●  Secondary: Go, Java/Kotlin (Spring)

●  APIs: REST, GraphQL, gRPC

2. Databases & Storage

● SQL: PostgreSQL, MySQL

● NoSQL: MongoDB, DynamoDB

● Caching: Redis, Memcached

● Search: Elasticsearch, Algolia

● Storage/CDN: AWS S3, CloudFront

● Queues: Kafka, RabbitMQ, AWS SQS

3. Cloud & Infrastructure: 

● Cloud: AWS (primary), GCP/Azure (nice to have)

● Compute: EC2, Lambda, ECS, EKS

● Infrastructure: Terraform, CloudFormation

● CI/CD: GitHub Actions, Jenkins, CircleCI

● Containers: Docker, Kubernetes

4. Monitoring & Operations 

● Monitoring: Datadog, New Relic, CloudWatch

● Logging: ELK Stack, CloudWatch Logs

● Error Tracking: Sentry, Rollbar

● APM tools

5. Security & Auth

● Auth: JWT, OAuth 2.0, SAML

● Secrets: AWS Secrets Manager, Vault

● Security: Encryption (at rest/in transit), TLS/SSL, IAM

What We’re Looking For:

1. Must-Haves

● 5+ years in backend engineering with strong system design expertise

● Experience building scalable systems from scratch

● Expert-level proficiency in at least one backend stack (Node, Python, Go, Java)

● Deep understanding of distributed systems and microservices

● Strong SQL/NoSQL design skills with performance optimization

● Hands-on AWS cloud experience

● Ability to write high-quality production code daily

● Experience building and scaling RESTful APIs

● Strong understanding of caching, sharding, horizontal scaling

● Solid security and best-practice implementation experience

● Proven leadership and mentoring capability

2. Highly Desirable

● Experience with large file processing (3D, video, images)

● Background in SaaS, multi-tenancy, or e-commerce

● Experience with real-time systems (WebSockets, streams)

● Knowledge of ML/AI infrastructure

● Experience with HA systems, DR planning

● Familiarity with GraphQL, gRPC, event-driven systems

● DevOps/infrastructure engineering background

● Experience with XR/AR/VR backend systems

● Open-source contributions or technical writing

● Prior senior technical leadership experience

Technical Challenges You’ll Solve:

● Designing large-scale 3D asset processing pipelines

● Serving XR content globally with ultra-low latency

● Scaling from thousands to millions of daily requests

● Efficiently handling CPU/GPU-heavy workloads

● Architecting multi-tenancy with complete data isolation

● Managing billions of analytics events at scale

● Building future-proof APIs with backward compatibility

Why company:

● Architectural Ownership: Build foundational systems from scratch

● Deep Technical Work: Solve distributed systems and scaling challenges

● Hands-On Impact: Design and code mission-critical infrastructure

● Diverse Problems: APIs, infra, data, ML, XR, asset processing

● Massive Scale Opportunity: Build systems for exponential growth

● Modern Stack and best practices

● Product Impact: Your architecture directly powers millions of users

● Leadership Opportunity: Shape engineering culture and direction

● Learning Environment: Stay at the forefront of backend engineering

● Backed by AWS, Microsoft, Google

Location & Work Culture:

● Location: Bengaluru

● Schedule: 6 days a week, (5 days-in-office, Saturdays WFH)

● Culture: Builder mindset, strong ownership, technical excellence

● Team: Small, highly skilled backend and infra team

● Resources: AWS credits, latest tooling, learning budget

What you'll do:

·        Perform complex application programming activities with an emphasis on mobile development: Node.js, TypeScript, JavaScript, RESTful APIs and related backend frameworks

·        Assist in the definition of system architecture and detailed solution design that are scalable and extensible

·        Collaborate with Product Owners, Designers, and other engineers on different permutations to find the best solution possible

·        Own the quality of code and do your own testing. Write unit test and improve test coverage.

·        Deliver amazing solutions to production that knock everyone’s socks off

·        Mentor junior developers on the team

What we’re looking for:

·        Amazing technical instincts. You know how to evaluate and choose the right technology and approach for the job. You have stories you could share about what problem you thought you were solving at first, but through testing and iteration, came to solve a much bigger and better problem that resulted in positive outcomes all-around.

·        A love for learning. Technology is continually evolving around us, and you want to keep up to date to ensure we are using the right tech at the right time.

·        A love for working in ambiguity—and making sense of it. You can take in a lot of disparate information and find common themes, recommend clear paths forward and iterate along the way. You don’t form an opinion and sell it as if it’s gospel; this is all about being flexible, agile, dependable, and responsive in the face of many moving parts.

·        Confidence, not ego. You have an ability to collaborate with others and see all sides of the coin to come to the best solution for everyone.

·        Flexible and willing to accept change in priorities, as necessary

·        Demonstrable passion for technology (e.g., personal projects, open-source involvement)

·        Enthusiastic embrace of DevOps culture and collaborative software engineering

·        Ability and desire to work in a dynamic, fast paced, and agile team environment

·        Enthusiasm for cloud computing platforms such as AWS or Azure

Basic Qualifications: 

·        Minimum B.S. / M.S. Computer Science or related discipline from accredited college or University

·        At least 4 years of experience designing, developing, and delivering backend applications with Node.js, TypeScript

·        At least 2 years of experience building internet facing services

·        At least 2 years of experience with AWS and/or OpenShift

·        Exposure to some of the following concepts: object-oriented programming, software engineering techniques, quality engineering, parallel programming, databases, etc.

·        Experience integrating APIs with front-end and/or mobile-specific frameworks

·        Proficiency in building and consuming RESTful APIs

·        Ability to manage multiple tasks and consistently meet established timelines  

·        Strong collaboration skills

·        Excellent written and verbal communications skills

Preferred Qualifications:

·        Experience with Apache Cordova framework

• Demonstrable knowledge of native coding background in iOS, Android

·        Experience developing and deploying applications within Kubernetes based containers

Experience in Agile and SCRUM development techniques

Requirements

• 3+ years work experience with production-grade python. Contribution to open source repos is preferred
• Experience writing concurrent and distributed programs, AWS lambda, Kubernetes, Docker, Spark is preferred.
• Experience with one relational & 1 non-relational DB is preferred
• Prior work in the ML domain will be a big boost

What You’ll Do

• Help realize the product vision: Production-ready machine learning models with monitoring within moments, not months.
• Help companies deploy their machine learning models at scale across a wide range of use-cases and sectors.
• Build integrations with other platforms to make it easy for our customers to use our product without changing their workflow.
• Write maintainable, scalable performant python code
• Building gRPC, rest API servers
• Working with Thrift, Protobufs, etc.

If you're an experienced back-end developer with experience using serverless architecture (AWS Lambda, DynamoDB) and microservices, this could be the ideal job for you!

You'll be at a senior position, developing & maintaining microservices, business logic, and optimization/maintenance of the global database(s) to ensure a high performance & responsiveness to requests from the front-end.

Language:

Node.js/Tyepscript

Resposibilities:

Building stable, testable, and reusable code libraries for future use.

Write & maintain REST APIs for front-end consumption.

Managing deployments, code pushes (CI/CD pipelines).

Ongoing optimization of backend applications for maximum speed and scalability.

Implementation of security and data protection.

Design and implementation of data storage solutions.

Ideal Candidate:

At least 3-4+ years of server-side programming experience.

Solid experience working with NoSQL databases & microservices architecture.

Solid experience with version control (we use Github).

Decent experience with serverless architecture, code deployment and cloud platforms like AWS.

GOOD TO HAVE: Any experience working with fintech projects.

Position: Senior Backend Developer (NodeJS)

Experience: 5+ Years

Location: Bengaluru

CodeCraft Technologies multi-award-winning creative engineering company offering design and technology solutions on mobile, web and cloud platforms.

We are looking for an enthusiastic and self-driven Backend Engineer to join our team.

Roles and Responsibilities:

● Develop high-quality software design and architecture

● Identify, prioritize and execute tasks in the software development life cycle.

● Develop tools and applications by producing clean, efficient code

● Automate tasks through appropriate tools and scripting

● Review and debug code

● Perform validation and verification testing

● Collaborate with cross-functional teams to fix and improve products

● Document development phases and monitor systems

● Ensure software is up-to-date with the latest technologies

Desired Profile:

● NodeJS [Typescript]

● MongoDB [NoSQL DB]

● MySQL, PostgreSQL

● AWS - S3, Lambda, API Gateway, Cloud Watch, ECR, ECS, Fargate, SQS / SNS

● Terraform, Kubernetes, Docker

● Good Understanding of Serverless Architecture

● Proven experience as a Senior Software Engineer

● Extensive experience in software development, scripting and project management

● Experience using system monitoring tools (e.g. New Relic) and automated testing frameworks

● Familiarity with various operating systems (Linux, Mac OS, Windows)

● Analytical mind with problem-solving aptitude

● Ability to work independently

Good to Have:

● Actively contribute to relevant open-source projects, demonstrating a commitment to community collaboration and continuous learning.

● Share knowledge and insights gained from open-source contributions with the development team

● AWS Solutions Architect Professional Certification

● AWS DevOps Professional Certification

● Multi-Cloud/ hybrid cloud experience

● Experience in building CI/CD pipelines using AWS services

JD-Backend Intern (NodeJs)

Internship Span – 6 Months (Fulltime)

Ventura Securities is establishing its fintech team - a remote-first, work from anywhere team with highly talented individuals who come from diverse backgrounds and looking to solve real client problems at scale. Ventura has been in the stockbroking business for 20+ years and it is a robust and profitable franchise with 1000+ employees currently. We are looking for passionate techies with skills primarily around AWS and Node’s/JS who are aspiring for a fast-track career.

Your Key Responsibilities: 

• Build out of the Ventura cloud-based backend platform from scratch

• Ownership and monitoring of our D2C backend

• Robust documentation skills and desire to share information with others

• Desire and ability to prototype ideas quickly, and be willing to experiment and learn

Basic Requirements:

• Very strong Nodejs, AWS Lambda, Postgres, ORM (Sequelize)

• Clean coding skills around Nodejs 

• Hands-on experience around writing testable code, working with git, doing peer-level code review, daily standups, and generally championing software excellence.

• Should have concepts cleared around Nodejs and JS

• Strong proficiency with JavaScript

• Ability to use Async programming to improve performance & productivity

• Strong problem solving skills with understanding of Data Structures and Algorithms.

• What you get: 

• Chance to build out a next-gen fintech product from ground 0

• Opportunity to influence the design of the product

• Flexible and work anywhere environment running out of Slack

• Flat org structure

• This internship is paid internship.

We are looking for a Node.js Developer who has experience building back-end services and managing data exchange between the server and user-facing applications. Responsibilities will include the development of back-end micro-services, maintaining the best possible performance for micro-service, quality and responsiveness of the application. You will work closely with the front-end developers in order to implement their components into the application.

• Writing reusable, testable, and efficient code
• Responsible for entire product lifecycle from concept to deployment
• Design and implementation of low-latency, high-availability, and performant applications
• Integration of user-facing elements developed by front-end developers with server-side logic
• Implementation of security and data protection
• Integration of data storage solutions

• 3+ years experience in building micro-services using Node.js
• Expert in SQL querying with Mysql/PostgreSQL and ORM (Object Relational Mapper) libraries like TypeORM.
• Able to integrate multiple data sources and databases into one system
• Good understanding of server-side templating languages
• Understanding of accessibility and security compliance
• Knowledge of user authentication and authorization between multiple systems, servers, and environments
• Understanding of fundamental design principles behind a scalable application
• Understanding of the differences between multiple delivery platforms, such as mobile vs desktop, and optimizing output to match the specific platform
• Able to create database schemas that represent and support business processes
• Strong unit test and debugging skills
• Proficient understanding of code versioning tools such as Git