NodeJS Developer

We are looking for an experienced SDE-3 Backend Engineer (Node.js) to lead the backend engineering pod responsible for third-party integrations, observability, and engineering support.

The role requires someone who is technically strong in Node.js, TypeScript, databases, and backend system design, and who can remain hands-on while guiding engineers and working closely with internal teams and external partners.

Key Responsibilities

• Own delivery, quality, and production stability for third-party
• integrations, observability, and engineering support.
• Own technical design, architecture decisions, code reviews, and delivery quality for services owned by the pod.
• Drive strong engineering practices across design reviews, code reviews, testing, documentation, release discipline, and operational readiness.
• Design, build, and maintain scalable backend services and APIs using Node.js and TypeScript.
• Own integrations with banks, payment partners, fintech partners, and other external systems.
• Ensure partner integrations are reliable, secure, well-documented, and easy to support.
• Build monitoring, alerting, dashboards, and visibility across critical services and partner workflows.
• Create and maintain runbooks, SOPs, dashboards, and troubleshooting guides for critical services and partner workflows.
• Drive timely resolution of production issues, partner issues, and internal escalations.
• Perform RCA for incidents and ensure long-term fixes are implemented.
• Mentor junior engineers and improve engineering practices within the pod.

• Strong hands-on experience in Node.js and TypeScript backend development.
• Strong database skills, including schema design, query optimization, indexing, transactions, and performance tuning.
• Strong understanding of building scalable, performant, resilient, and fault-tolerant backend systems.
• Experience with third-party integrations, webhooks, callbacks, retries, timeouts, and error handling.
• Strong debugging and production issue resolution skills.
• Experience with logging, monitoring, alerting, dashboards, and observability tools is preferred.
• Good understanding of secure API design, authentication, authorization, and data protection.
• Exposure to AWS, Docker, Kubernetes, CI/CD, Grafana, Prometheus, ELK, or similar tools.
• Ability to guide and mentor engineers while remaining hands-on.
• Ability to drive delivery, manage technical execution, and ensure quality within the pod.
• Strong communication skills for working with internal teams and external stakeholders.

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 Backend Engineer for a dedicated client engagement building an AI-powered application builder platform.

The backend is the operational core of the product: it manages user projects and sessions, coordinates long-running AI agent workloads, maintains project state, and serves as the integration layer between the frontend, the AI system, and the underlying infrastructure.

The mandatory requirement is hands-on production experience shipping Node.js services, with end-to-end ownership of API design, data modelling, and at least one production system involving background job processing or event-driven patterns.

Responsibilities

API and service development: Design and build REST APIs in Node.js with TypeScript. Cover authentication, session management, input validation, structured error handling, streaming responses (SSE, WebSockets), and rate limiting. Maintain clean API contracts that the frontend and AI system can rely on.

Database design and management: Own PostgreSQL schema design for product domains including user accounts, projects, file trees, session state, and generated artefacts. Write efficient queries, manage migrations, and optimise for read patterns that serve a real-time editor experience.

Caching strategy: Implement and maintain caching with Redis for session data, project state, and frequently read configuration. Design cache invalidation logic that keeps the editor experience consistent without stale reads.

Queue and background job management: Implement and operate background job infrastructure using BullMQ or equivalent. AI agent runs are long-running and stateful; handle retries, failure states, priority queues, and concurrency limits.

AI system integration: Build the integration layer between the backend and the AI agent system. Manage job dispatch, result handling, streaming output to the frontend, and error propagation.

Multi-tenancy and access control: Implement tenant data isolation, RBAC, and resource ownership enforcement across all API surfaces.

Observability and reliability: Instrument services with structured logging, metrics, and tracing. Write defensive code with sensible timeouts, fallback behaviour, and circuit breaking on external dependencies.

Testing and code quality: Write unit and integration tests for the services you ship. Review the work of peers and contribute to shared engineering conventions.

Requirements

• Hands-on production Node.js experience (mandatory) — must have personally shipped at least one feature area end to end in a production Node.js service, owning API design, data modelling, and testing.

• 3 to 5 years of professional backend engineering experience. Candidates with slightly less time but strong demonstrated ownership are welcome to apply.

• Strong Node.js and TypeScript. Production experience with Express, NestJS, or Fastify. Solid with async patterns, streaming, error handling, and building services that run reliably under sustained load.

• PostgreSQL depth. Schema design, query writing, indexing, and migrations on at least one production system.

• Redis and caching. Production experience using Redis for caching and session management. Understands cache invalidation trade-offs.

• Queue and background job systems. Hands-on with BullMQ, RabbitMQ, SQS, or equivalent. Experience managing retries, dead-letter queues, job priority, and concurrency control.

• AWS working knowledge. Comfortable with EC2, S3, RDS, SQS, and IAM. Familiar with Docker and basic deployment and environment management.

• Strong written and spoken English. Able to communicate clearly with engineers across disciplines and write precise technical documentation.

Nice to Have

Experience integrating with AI or LLM services (streaming responses, structured outputs, retry patterns); WebSocket or SSE implementation for real-time features; multi-tenant SaaS product experience; GraphQL; OpenTelemetry instrumentation; prior work on developer tools or editor-style products.

Role: Core infrastructure for two global applications.

Key responsibilities:

Heavy Data Lifting: Designing and maintaining complex MongoDB aggregation pipelines and executing high-volume bulk updates.

Systems Connectivity: Managing the lifecycle of Bridges, WebSockets, and REST APIs for global traffic.

Global Reliability: Troubleshooting performance regressions, managing SSL/TLS certificates, and optimizing AWS S3/EC2 resources.

Core Logic: Implementing server-side push notifications, custom payment flows, and background Cron orchestration.

Requirements (Must Have)

Production Experience: Proven experience managing backend services for live, high-traffic applications. (Must have)

Note: Learning projects, bootcamps, and online courses will not be considered.

Python Mastery: Expert-level proficiency in backend Python development. (Must have)

MongoDB Expertise: Deep knowledge of Aggregations and Bulk operations. (Must have)

AWS Proficiency: Direct experience with S3 and EC2 in a production setting. (Must have)

Infrastructure Logic: Ability to manage SSL/Encryption and optimize resource allocation (Cron vs. API). (Must have)

Title: Python Developer

Job Type: Full-time

Responsibilities:

• Developing and maintaining Python-based applications.
• Writing clean, maintainable, and efficient code.
• Integrating user-facing elements developed by front-end developers with server-side logic.
• Identifying and fixing bottlenecks and bugs.
• Participating in code reviews.
• Collaborating with cross-functional teams to design, develop and implement new features.

Requirements:

• Bachelor's or Master's degree in Computer Science or a related field.
• Strong proficiency in Python and its frameworks such as Django or Flask.
• Understanding of fundamental design principles behind a scalable application.
• Familiarity with code versioning tools such as Git.
• Knowledge of databases such as MySQL, PostgreSQL or MongoDB.
• Good problem-solving skills and attention to detail.
• Excellent communication and collaboration skills.

We are looking for an experienced Back-end developer to join our IT team. You will be responsible for the server-side of our web applications.

If you have excellent programming skills and a passion for developing applications or improving existing ones, we would like to meet you. As a Back-end developer, you’ll work closely with our engineers to ensure system consistency and improve user experience.

Ultimately, you should be able to develop and maintain functional and stable web applications to meet our company’s needs.

• Participate in the entire application lifecycle, focusing on coding and debugging
• Write clean code to develop functional web applications
• Troubleshoot and debug applications
• Perform UI tests to optimize performance
• Manage cutting-edge technologies to improve legacy 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 and system administrators to identify new features
• Follow emerging technologies

Required Qualifications and Skills:

• 3-5 years of work experience in the development background, with at least 2 years experience in Java, Spring, Sprint Boot, Hibernate or JPA, MySQL, Oracle, Spring MVC.
• B.E. degree in Computer Science, Graduate in Software Engineering or equivalent
• Experience in Core JAVA, Spring, Spring Boot Frameworks.
• Experience with ORM's like Hibernate.
• Good knowledge of developing RESTful web services using Spring Boot, Java1.x,Servlet2.4, JSP2.0, JDBC3.0, Java Mail, Struts2.x, HTML, HTML5, Angular7+, JavaScript, JSF, Bootstrap2.x-3.x, JQuery & CSS 3.x, Maven 3.x, Apache Tomcat7
• Knowledge of Cloud AWS.
• Experience in any Messaging Queue e.g. Apache Kafka, ActiveMQ, etc.
• Experience on Web services with REST and SOAP.
• Experience working on tool set like Eclipse IDE, SQL clients.
• Experience using application server like Jboss, TomCat, Wildfly, glassfish.
• Experience in using tools like SOAP UI, POSTMAN
• Ability to write SQL queries to fetch data.
• Knowledge of Micro services, Redis Cache and Mongo DB (or any other NoSQL) is good to have