Sr. Data Scientist

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

About the Company

F22 Labs is a startup software studio based in Chennai. We power startups worldwide by building high-quality software products. From web apps to mobile platforms, we help entrepreneurs turn their ideas into beautifully crafted solutions. If you're passionate about software development and eager to build real products that solve real problems, you’ll fit right in.

Position Overview

We are seeking a talented and experienced Senior Node.js Developer to join our growing engineering team. In this role, you will be instrumental in designing, developing, and maintaining the backbone of our applications. You'll leverage your 3-5 years of expertise to build robust, scalable, and high-performance backend services and APIs. You will also play a key role in making architectural decisions, mentoring junior developers, and driving best practices within the team. If you're eager to tackle complex problems, contribute to innovative projects, and lead by example, this position is for you.

Key Responsibilities

● Design, develop, test, deploy, and maintain highly scalable and reliable backend services, APIs, and systems using Node.js (with frameworks like Express.js or NestJS) and TypeScript.

● Architect and implement robust solutions for complex business requirements, ensuring code quality, performance, and security.

● Collaborate closely with cross-functional teams including front-end developers, product managers, QA engineers, and designers to deliver high-quality products.

● Lead and participate in code reviews, providing constructive feedback to ensure adherence to coding standards and best practices.

● Design and manage database schemas (SQL and NoSQL, e.g., PostgreSQL, MongoDB, Redis) and optimize database queries for performance.

● Develop and maintain comprehensive unit, integration, and E2E tests to ensure software quality and reliability.

● Work with containerization technologies like Docker and orchestration tools like Kubernetes for deploying and managing applications.

● Implement and maintain CI/CD pipelines for automated building, testing, and deployment of applications.

● Mentor and guide junior developers, fostering a culture of learning and continuous improvement.

● Troubleshoot, debug, and upgrade existing software, identifying and resolving performance bottlenecks.

● Stay up-to-date with emerging technologies, industry trends, and best practices in Node.js development and backend architecture.

● Contribute to architectural discussions and decisions, helping to shape the future of our backend systems.

Qualifications and Requirements

● 3-5 years of professional experience in backend development with a strong focus on Node.js.

● Expert proficiency in TypeScript.

● Proven experience with Node.js frameworks such as Express.js or NestJS (highly preferred).

● Strong understanding of asynchronous programming, event-driven architecture, and design patterns.

● Solid experience in designing, building, and consuming RESTful APIs; experience with GraphQL is a plus.

● Proficiency with both SQL (e.g., PostgreSQL, MySQL) and NoSQL (e.g., MongoDB, Redis) database technologies, including data modeling and query optimization.

● Hands-on experience with containerization technologies (Docker) and a good understanding of container orchestration (Kubernetes).

● Experience with CI/CD tools and practices (e.g., Jenkins, GitLab CI, GitHub Actions).

● Experience deploying and managing applications on cloud platforms (AWS, Azure, or GCP), including familiarity with relevant services (e.g., EC2, S3, Lambda, RDS).

● Strong problem-solving, analytical, and critical thinking skills.

● Excellent communication and collaboration skills, with the ability to work effectively in a team environment.

● Proven ability to mentor junior team members.

● Familiarity with Git and collaborative development workflows.

Good to have:

● Experience with testing frameworks (e.g., Jest, Mocha, Chai) and a commitment to writing well-tested code.

● Experience with microservices architecture and distributed systems.

● Experience with serverless architecture (e.g., AWS Lambda, Azure Functions).

● Knowledge of message queue systems (e.g., Kafka, RabbitMQ, AWS SQS).

● Familiarity with Infrastructure as Code (IaC) tools like Terraform or CloudFormation.

● Understanding of front-end technologies (e.g., React, Angular, Vue.js) to facilitate better collaboration.

● Experience with performance monitoring and optimization tools.

● Active contributions to open-source projects or a strong portfolio of personal projects.

Why Join Us (Perks & Benefits)

● Flexible work timings.

● Fast-paced, hands-on learning environment.

● Fun, collaborative, and supportive team culture.

● Real-world impact from day one.

If you're looking to supercharge your development skills and work on meaningful software in a startup that values learning and creativity, we’d love to hear from you. Apply today! 

Responsibilities

- Software Engineering

- Design and develop highly scalable, available, reliable, secure and fault tolerant systems with minimal

guidance for a market leader in the logistics industry

- Partner with team members on functional and nonfunctional requirements and spread design

philosophy, goals and improve the code quality across the team

- Research new technologies and tools that enable building the next generation of our services

- Provide technology leadership to the team and foster engineering excellence

- Product Delivery

- Partner with product managers to define and execute on the feature roadmap

- Translate business requirements into scalable and extensible design

- Coordinate with various cross functional teams on planning and execution

- Maintaining automated build / test / deployment environments

Qualifications

- Software Engineering

- Should have at least 2 years of hands on experience in designing, developing, testing and deploying

applications on Java, Ruby, Kotlin, Python, Node or Go for large scale applications

- Deep knowledge of one of the programming language they have experience in

- Proficient in OOP and Design Patterns, experience with functional programming would be a plus

- Data modelling experience in Relational Databases

- Ability to design and implement low latency RESTful services

- Product Delivery

- Ability to scope, review and refine user stories for technical completeness and to alleviate dependency

risks.

- Well versed in working with agile methodologies which includes phases such as design, development,

code review, testing and release management

- Ability to have worked in a CI/CD environment, with hands on experience with Git or any similar source

code management tools

- Product Maintenance

- Experience troubleshooting server performance issues such as memory tuning, GC tuning, resource leaks

etc

- Continuously refactor applications to ensure high quality design.

Nvizion Solutions is looking for the position of Site Reliability Engineer.

If interested, kindly share your resume along with contact details.

Title: Site Reliability Engineer

No. of job openings: 2

Location:Gurgaon/ Hyderabad/ Bengaluru/ Mumbai/Chennai ( Remote location)

Remuneration:Best in the Industry

·      Experience required: 2 to 4 yrs in the industry

·      Ensuring overall System's reliability

·      Add automation and alerting in the system

·      Providing Troubleshooting support

·      Cross team communications. Working closely with Product team and Customer success team.

·      Proactive support - to ensures the system is back to the healthy state

·      R&D for new tools/technologies to support product and support team

·      Good verbal/written communication to connect with the client.

·      Good team player with a zeal to learn new technologies.

·      The candidate will be part of the team responsible for 24X7 monitoring of distributed global platform.

• Linux Scripting
• CI/CD knowledge (Jenkins/ BitBucket Pipelie /GitOps)
• Version Control
• Cloud platform knowledge (GCP/AWS/Azure/Digital Ocean)
• Docker, Kubernetes

About Company:

Propelius Technologies is a next generation software development studio focused on developing cutting edge Web and Mobile Applications on JavaScript based technologies like ReactJS, React Native and Node.js. We have domain expertise in SAAS, FinTech, LegalTech and InsuranceTech.

About the Role:

As a Senior Developer, you will be responsible for developing and maintaining high-quality web applications using ReactJS and NodeJS. You will work closely with the development team to design and implement new features, as well as maintain and improve existing ones. You will also be responsible for ensuring the application is performant and scalable.

Roles & Responsibilities:

• Developing and designing front end web architecture
• Building interactive consumer data from multiple systems
• Define code architecture decisions to support high-performance products
• Translate wireframes and PSD Designs into functional web applications
• Work with development teams and managers to ideate software solutions
• Developing well-functioning databases and applications
• Conduct and participate in project planning & scheduling and design discussions
• Test software to ensure efficiency
• Address and improve any technical issues

Skills Required :

• In-depth knowledge of NodeJS, ExpressJS or Restify
• Ability to bind UI elements to JavaScript object models
• Experience creating RESTful services with Node.js
• Proficiency in OOP and database concepts
• Proven experience in front & back-end development
• Ability to create front end applications using HTML5, Angular, LESS/SASS
• Knowledge of modern frameworks and design patterns
• Ability to create Unit and Integration tests to ensure the quality of code
• Strong problem-solving skills
• Good communication skills
• Strong analytical thinking
• Self-motivated
• Strong will and discipline

Perks you receive:

• Competitive Salary - Oh Yes!! This is a must.
• 5 days working - As you want it :)
• Opportunity to work with top professionals
• Platform to learn new technologies and grow yourself - We believe in learning & evolving
• Open Culture - No politics, Views are appreciated always!!
• Monthly Celebrations

We are hiring a business analyst to join our project team. You will work alongside project stakeholders and report directly to Sr. Business analysts. The purpose of the role is to liaison and bridge the gap between the BDM team and technical team to comprehend and analyze customer requirements and translate them to the development teams thereby, ensuring the right requirement detail in the documentation.

To succeed in this role, you should have a natural analytical way of thinking and be able to explain difficult concepts to the team.

Responsibilities

· Elicit requirements, gathering, & documenting.

· Ability to grasp, relate, and quickly respond to new inquiries.

· Interaction with team members at regular intervals, share knowledge and information

· Clear and concise communication and project management skills.

· Detail out scope documents, functional & non-functional requirements, features, etc. ensuring all stated and unstated customer needs are captured.

· Construct project documents (BRD, FRD) as per the project requirement and develop Flow charts, Use case diagrams, ER diagrams, User stories

· Performing requirements analysis

· Understand SDLC and fit into the Agile environment.

· Co-operating behavioral with the cross-functional team and being able to translate business needs into technical needs.

· Interface and coordinate with BDM team engagement & understand the client’s requirements

Qualifications

1) 1-2 years of experience as a Business analyst with strong knowledge of project management.

2) Experienced in Mobile & Website development projects.

• 7– 10 years of relevant work experience
• Graduation is a must
• Excellent communication skills
• Excellent knowledge and experience in managing heavy equipment and spares
• Good staff management skills    

Responsibilities
- Experience executing projects on WordPress
- Experience customizing existing WordPress plug-ins for integration or other requirements
- Expertise in customizing, developing, and integrating WordPress themes
- Manage the project giving importance to cost and quality
- Work with the user group to improve the solution

- Document existing functions and processes

Skills & Qualifications
- Minimum 4 year of hands on experience in WordPress development
- Good understanding of PHP, MYSQL, HTML5, CSS3 and jQuery
- Strong knowledge of PHP web frameworks
- Understanding the fully synchronous behavior of PHP
- Understanding fundamental design principles behind a scalable application
- Integration of multiple data sources and databases into one system
- Familiarity with SQL/NoSQL databases and their declarative query languages