Top Backend Jobs in Kolkata

Build and scale production-grade agentic AI infrastructure and platform capabilities. Lead architecture, technical design, reliability, scalability, data privacy, and end-to-end delivery. Collaborate with product and innovation teams to define customer solutions, mentor engineers, improve developer experience, and resolve complex technical issues. The role requires backend engineering, cloud infrastructure, APIs, databases, automated testing, infrastructure as code, and CI/CD expertise.

Design and ship secure, scalable backend services for INR fund flows and retail derivatives trading. Own APIs, order management, margin, risk, liquidation, settlement, market connectivity, reconciliation, and service reliability. Partner with mobile and product teams, lead architecture and code reviews, mentor engineers, and coordinate with global stakeholders.

Develop and maintain scalable backend web applications using Python and Django. Design APIs, middleware, database schemas, and queries; troubleshoot performance issues; write maintainable code; and collaborate with product, design, frontend, and DevOps teams. The role also supports cloud deployment and may grow into full-stack development.

Develop and maintain scalable cloud-native applications using .NET, C#, and Java or Python. Collaborate with cross-functional teams, implement unit testing and TDD, participate in Agile ceremonies, maintain CI/CD pipelines, use Git-based version control, and contribute to code reviews. The role also involves modernizing legacy .NET applications, designing database schemas, applying architectural patterns, and delivering AI, analytics, and mission-critical client solutions.

Develop and maintain high-quality software, collaborate cross-functionally to ship features, identify bottlenecks, fix bugs, and evaluate technologies that improve development efficiency. The role requires independent ownership, strong problem-solving and product thinking, effective communication, and a willingness to exchange constructive feedback in a flat, remote organization.

Designs, develops, tests, deploys, and maintains scalable Java Spring Boot microservices and distributed cloud systems. Contributes to architecture, technical strategy, roadmaps, monitoring, testing, and continuous integration. Troubleshoots complex application issues, collaborates with product and engineering teams, estimates delivery work, and mentors junior engineers. The role also documents current and future-state processes and recommends technical improvements. GCP experience is preferred, including Cloud Run, GKE, Pub/Sub, Cloud SQL, and BigQuery.

Designs, develops, and operates scalable backend services, APIs, data integrations, and microservices. Owns domain architecture, database performance, reliability, observability, incident response, security, testing, and roadmap delivery. Leads design reviews, improves engineering standards, mentors backend engineers, and collaborates with product and global teams. The role requires technical leadership, strong system design, cloud infrastructure experience, and production operation of large-scale consumer applications.

Develop and deploy scalable backend services for web applications. Responsibilities include RESTful API development and testing, database integration, asynchronous task queuing, containerization, and collaboration with the development team. The role uses Python frameworks such as FastAPI, Flask, or Django, relational databases, Docker, and potentially Kubernetes and cloud platforms.

Lead the Platform Services engineering team responsible for shared infrastructure, internal tooling, and core services. Own distributed systems architecture, cloud reliability, observability, cost optimization, roadmap delivery, and incident management while remaining hands-on with code and production systems. Hire, mentor, and develop engineers; establish technical standards; and collaborate with product engineering, SRE, security, and leadership. Drive AI-assisted engineering practices and platform automation.

Lead enterprise backend architecture for scalable, distributed, cloud-native applications using Java, Spring Boot, and microservices. Define architecture standards, service boundaries, integration patterns, HLD/LLD designs, and cloud deployment strategies. Drive modernization, observability, CI/CD, security, performance, and resiliency initiatives across engineering teams. Provide technical leadership, conduct architecture and code reviews, mentor developers, and collaborate with stakeholders on technology roadmaps and enterprise solutions.

Develop and own highly scalable backend services for IoT, order, and payment systems. Responsibilities include Java and Python development, distributed systems design, database and cache optimization, event-driven architectures, production troubleshooting, observability, incident response, reliability improvements, and collaboration with Infrastructure, QA, and Product teams.

Lead backend and data-platform architecture while remaining hands-on with Java production code. Design and operate distributed systems for event ingestion, analytical querying, data processing, and low-latency serving. Work with ClickHouse, BigQuery, Bigtable, Kafka, Redis, GCP, and Dataflow to solve scalability, reliability, performance, and data-correctness challenges. Set technical direction, review designs, mentor engineers, and guide platform convergence across Wingify and AB Tasty.

Design, build, optimize, and operate scalable, low-latency backend services for an AI risk decisioning SaaS platform. Collaborate with product, frontend, and QA teams; implement testing and CI/CD practices; monitor service health; resolve performance bottlenecks; and mentor junior engineers.

Design and build scalable Java backend services for subscriptions, payments, entitlements, and Fire TV in-app purchases. Develop REST APIs, microservices, event-driven workflows, and reliable transaction-processing systems. Integrate payment providers and external platforms while ensuring idempotency, fault tolerance, consistency, and high performance. Improve observability, troubleshoot distributed production systems, and participate in architecture and code reviews.

Design and build scalable Java and Spring Boot backend services for subscriptions, payments, entitlements, and Fire TV in-app purchases. Develop REST APIs, microservices, and event-driven workflows integrating payment providers and external platforms. Ensure high availability, fault tolerance, idempotent transaction processing, and performance during traffic spikes. Troubleshoot distributed production systems, improve observability, and participate in architecture and code reviews while mentoring engineers.

Lead backend engineering for NIRA’s consumer credit platform, scaling infrastructure, expanding support for financial products, and improving credit decision systems. Collaborate with engineering teams across APAC and with product, finance, compliance, support, and analytics stakeholders. Own technical solutions end to end in an AWS-native environment while contributing to platform and product strategy.

Lead technical direction and delivery for a core NIRA backend domain: design and ship high-volume web APIs, own architecture for distributed and queue-based systems, drive complex initiatives, mentor engineers, lead incident response, champion AI dev tools, and align cross-functionally to simplify systems and influence roadmap.

Develop Java backend software using Core Java, object-oriented programming, Spring Boot, REST APIs, databases, Redis, JPA, Docker, and JUnit. Collaborate with IT teams to create high-quality software solutions, troubleshoot problems, and support reliable application development. The role requires Java up to version 17, database experience, strong analytical skills, and effective communication.

Designs and evolves highly scalable backend systems, APIs, distributed workflows, databases, messaging infrastructure, and observability solutions. Leads cross-team architecture initiatives, resolves complex production issues, optimizes performance and data access, establishes reliability and engineering standards, modernizes technical debt, mentors engineers, and remains hands-on with critical systems.

Own technical direction and hands-on execution for major products, systems, and engineering initiatives. Design scalable systems across backend, frontend, APIs, databases, and infrastructure; write and review code; lead architecture decisions; solve production issues; convert ambiguous problems into technical plans; improve engineering quality; and mentor engineers across teams.

Develop backend blockchain functionality for Cardax DEX on the Cardano blockchain. Write and maintain smart contracts in Plutarch and Haskell that define the constraints and conditions for decentralized token exchange without a central entity.

Lead end-to-end backend project execution, architecture, and technical decisions for highly concurrent, low-latency systems. Build scalable services using Ruby on Rails and Go, optimize PostgreSQL and Redis performance, maintain data consistency across microservices, and improve observability, testing, and CI/CD. Collaborate cross-functionally, mentor engineers, resolve infrastructure bottlenecks, and guide long-term architectural and organizational improvements.

Leads the design and delivery of scalable backend features for a global telco SaaS platform. Provides hands-on technical leadership, translates business requirements into detailed designs, mentors engineering teams, and ensures performance, reliability, security, observability, and compliance. Owns feature delivery, supports production issues, maintains technical documentation, and collaborates with product, architecture, security, and distributed engineering teams.

Build and support scalable backend features, services, reusable libraries, and technology platforms. Own service delivery, reliability, security, scalability, observability, testing, incident resolution, and operational readiness. Develop RESTful microservices, manage cloud-based applications, drive engineering best practices, and provide L3 support. Collaborate with product and business stakeholders while mentoring engineers, removing technical blockers, and ensuring milestones, service-level objectives, and software quality standards are achieved.

Develop and maintain backend applications for field team operations. Responsibilities include designing systems and data models, resolving bugs and bottlenecks, writing unit-tested reusable code, integrating internal and external tools, and collaborating with product managers on system design. The role requires Core Java, object-oriented programming, SQL databases, web-service integration, and RESTful APIs, with Git and Spring or Hibernate experience preferred.