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.

Develop and maintain backend services for Binance Pay and Card, including scalable APIs, microservices, distributed transaction systems, and financial workflows. Work with databases, caches, queues, observability tools, and reliability practices. Troubleshoot production issues, write tested code, participate in reviews, and collaborate with product and engineering teams. This is an early-career accelerator internship for current students and recent graduates.

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.

Develop and maintain high-throughput distributed services for Binance’s KYC platform. Responsibilities include translating business requirements into reliable Java services, writing tests and documentation, tuning performance, troubleshooting incidents, collaborating across engineering teams, and mentoring junior engineers. The role requires expertise in Java, Spring, MySQL, distributed system design, messaging middleware, and collaboration across global teams. KYC or compliance experience and JVM, SQL, or RPC performance-tuning experience are desirable.

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 and maintain scalable cloud-native applications using .NET, C#, and Java or Python. Collaborate with cross-functional Agile teams, implement unit testing and TDD practices, maintain CI/CD pipelines, participate in code reviews, and use Git for version control. The role includes modernizing legacy .NET applications, designing database schemas, applying architectural patterns, and deploying solutions on Azure or Google Cloud Platform.

Develop realistic backend coding challenges, including feature implementations and bug fixes, for AI training projects. Design deterministic verifiers, automated tests, and validation criteria that distinguish correct from incorrect solutions. Evaluate code for correctness, reliability, maintainability, security, and performance while identifying edge cases and bottlenecks. Work independently with backend technologies and refine tasks based on project requirements and quality standards.

Participate in developing and maintaining core infrastructure products, documenting business interfaces, troubleshooting QA-reported issues, and helping Customer Success resolve and classify customer problems. The role is part of a 3–6 month accelerator internship for current students and recent graduates, requiring Java, Spring microservices, MySQL, Redis, RabbitMQ, Kafka, teamwork, logical thinking, and English fluency.

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.

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.

Designs and maintains scalable data pipelines, platform infrastructure, and backend services supporting AI Agent systems. Builds monitoring, alerting, observability, and data-quality capabilities while integrating distributed systems, databases, and message queues. Collaborates with AI, product, DevOps, frontend, and QA teams, and supports existing services to ensure stability and continuity.

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.

Develop and maintain large-scale backend infrastructure and distributed software systems. Responsibilities include architecture upgrades, performance tuning, incident troubleshooting, system refactoring, and writing clean, maintainable Java code. The role also guides junior engineers, shares technical knowledge, and collaborates across teams.

Design and lead backend application architecture and development for spot trading systems. Responsibilities include coding in Java, integrating databases and messaging middleware, debugging, testing, maintenance, migration, documentation, stakeholder collaboration, technical support, and mentoring junior developers. The role emphasizes distributed systems, enterprise application standards, and scalable architecture within a global blockchain ecosystem.

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.