Mumbai, Mh React native and react js developer Jobs – 78 Open Jobs Today

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Fleet Management —Andheri, Mumbai, Maharashtra
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Sr. Full Stack Developer

Puma Energy -
Mumbai, Maharashtra

Apply Now

Job details

Full-time

Qualifications

BCS
CI/CD
Cloud infrastructure
Azure
Oracle
Cloud architecture
Node.js
Computer Science
CSS
Software Engineering
PCI
React
iOS development
Software deployment
SAP
Mobile applications
iOS
ERP systems
Git
Responsive web design
Android
SQL
AWS
Flutter
Docker
Bachelor's degree
JavaScript
PostgreSQL
Terraform
Continuous integration
Back-end development
REST
APIs
JSON
Data visualization
Python
React Native
HTML

Full job description

Main Purpose:

Puma Energy is seeking a Full Stack Developer to join its Digital & Technology team, supporting the design, development, and operation of its core digital platform across multiple African markets. The platform handles high-volume transactional operations spanning mobile applications, ERP integrations, payment infrastructure, real-time data pipelines, and cloud-hosted backend services.

This role demands equal strength across backend API engineering, cloud infrastructure, and frontend development. The successful candidate will work across the entire stack: building and maintaining backend services and REST APIs, integrating with ERP and third-party platforms, developing mobile-facing interfaces, and contributing to the cloud data infrastructure that powers operational analytics and reporting.

KEY RESPONSIBILITIES:

Backend Development

API & Service Engineering

Design, build, and maintain RESTful APIs consumed by mobile applications, ERP systems, partner platforms, and internal operational tools.
Implement event-driven service patterns using message brokers and event streaming platforms to handle real-time transaction flows with defined latency SLAs.
Build webhook receivers and outbound event publishers to support bi-directional integration with third-party operational and payment systems.
Develop batch processing jobs for scheduled data exchange: extraction, transformation, delivery, reconciliation validation, and exception alerting.
Implement robust API security: OAuth2 / token-based authentication, token lifecycle management, rate limiting, API versioning, and request validation.
Design idempotent transaction processing services where duplicate events, network retries, or partial failures must not cause data integrity issues.
Build internal microservices and serverless functions for discrete processing tasks: transaction enrichment, notification dispatch, reconciliation logic, and data transformation.

ERP & System Integration

Develop and maintain integration layers between cloud-hosted services and ERP platforms via REST API and JSON-RPC; handle authentication, payload mapping, error recovery, and retry logic.
Build structured data bridges between modern cloud services and legacy ERP or operational systems: field mapping, reconciliation validation, discrepancy detection, and automated alerting.
Design and implement integration patterns for near-real-time transaction event ingestion from external operational platforms (point-of-sale, forecourt management, payment gateways) into backend services.
Maintain API client libraries for communication with banking, payment, and third-party operational infrastructure; manage versioning and backward compatibility.

Database & Data Engineering

Design and maintain relational database schemas (PostgreSQL) for high-volume transactional systems: indexing strategies, partitioning, query optimisation, and schema migration management.
Build and maintain cloud data pipeline connectors: stream transaction events from backend services into cloud event hubs and downstream data lake layers (Bronze / Silver / Gold Delta architecture).
Implement data quality controls: validation rules, deduplication logic, lineage tracking, and anomaly detection within ingestion pipelines.
Write optimised SQL and ORM queries for reporting and operational data retrieval; design materialized views and caching strategies for frequently accessed datasets.

Frontend & Mobile Development

Web & Operational Interfaces

Build and maintain operational web interfaces used by internal teams: dashboards, transaction management screens, reconciliation tools, and reporting views.
Develop responsive, accessible frontend components using a modern JavaScript framework (React or Vue); implement state management, lazy loading, and performance optimisation.
Build data visualisation components for operational and financial reporting: charts, pivot tables, and exportable transaction summaries.
Develop simplified UI modes for non-technical and lower-literacy end users, using icon-led navigation, minimal text input, and progressive disclosure patterns.

Mobile Application Support

Contribute to mobile application development (Android / iOS) or hybrid mobile frameworks; build and maintain features across customer-facing and operational mobile apps.
Implement mobile API integration layers: authenticated API calls, offline caching, background sync, and graceful degradation under poor connectivity conditions common in African markets.
Build QR code scanning, mobile payment flows, and real-time transaction status features within mobile applications.
Optimise mobile application performance for low-end Android devices and variable network conditions; implement app size reduction and asset optimisation strategies.

Cloud Infrastructure & DevOps

Design and deploy cloud-hosted backend services on AWS and/or Azure: serverless functions (Lambda / Azure Functions), managed queues, API gateways, and container orchestration.
Configure and maintain cloud event streaming infrastructure (e.g. AWS Kinesis, Azure Event Hubs) for real-time transaction ingestion from distributed operational sources.
Manage cloud networking: VPCs, security groups, private endpoints, egress controls, and network policies governing data flow between cloud regions and on-premise systems.
Build and maintain CI/CD pipelines: automated testing, build, containerisation, and deployment across development, staging, and production environments.
Implement infrastructure-as-code (Terraform or equivalent) for reproducible environment provisioning across multiple markets.
Instrument backend services with structured logging, distributed tracing (OpenTelemetry), and metrics collection; integrate with APM platforms for latency, error rate, and throughput monitoring.
Manage secrets, credentials, and environment configuration securely across multi-market cloud deployments; implement secret rotation and access auditing.

Quality & Engineering Standards

Write unit, integration, and end-to-end tests for all services and APIs; maintain coverage across critical transaction paths, edge cases, and failure scenarios.
Participate in and lead code reviews; enforce engineering standards covering security, performance, maintainability, and test coverage.
Own Git-based version control practices: feature branching, pull request workflow, semantic versioning, and structured release management across multiple concurrent markets.
Produce and maintain technical documentation: API contracts (OpenAPI/Swagger), architecture diagrams, data flow documentation, integration runbooks, and incident playbooks.
Provide Tier 2/3 production support: triage and resolve incidents relating to API failures, integration errors, data pipeline issues, and mobile application defects across live multi-market deployments.

SKILLS & COMPETENCIES:

Backend — Essential

3+ years backend development experience; strong proficiency in Python and/or Node.js for API and service development.
REST API design: endpoint design, authentication (OAuth2, JWT), versioning, error handling, and OpenAPI documentation.
PostgreSQL: schema design, query optimisation, indexing, and migration management.
Event-driven architecture: message brokers, event streaming platforms, webhook design, and async processing patterns.
Cloud platform experience (AWS and/or Azure): serverless compute, managed queues, API gateway, and storage services.
Docker and container-based deployment; CI/CD pipeline configuration and management.

Frontend & Mobile — Essential

React or Vue.js: component architecture, state management, routing, and performance optimisation.
Mobile development experience: React Native, Flutter, or native Android/iOS development.
HTML5, CSS3, and responsive design; familiarity with accessibility standards.
RESTful API integration from frontend and mobile clients: authentication flows, caching, offline support, and error handling.

Preferred

Experience integrating with ERP platforms via API (any major ERP: SAP, Oracle, Microsoft Dynamics, or open-source equivalents).
Familiarity with cloud data lake or lakehouse architecture (Delta Lake, Databricks, or equivalent); pipeline development experience.
OpenTelemetry instrumentation and APM platform integration.
Infrastructure-as-code (Terraform, Pulumi, or equivalent).
Experience with PCI-DSS considerations in payment integration contexts.
African market deployment experience: low-bandwidth optimisation, USSD/mobile-money integration patterns, and in-country compliance requirements.
Familiarity with fiscal e-invoicing requirements and tax system integrations.

Education

Bachelor's degree in Computer Science, Software Engineering, or a related technical discipline.
Relevant cloud certifications (AWS, Azure) advantageous.
Portfolio of shipped production projects demonstrating full-stack capability required.

Apply Now

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