Java Backend Specialist

Weekday AI (YC W21); Mumbai; On-site; INR 1,500,000 - 3,500,000; Full time

Job summary

Weekday AI (YC W21) is seeking a Senior Java Technical Lead with 8+ years of hands-on experience in Java development, microservices, cloud technologies, system architecture, and technical leadership. The role involves end-to-end solution design, guiding engineering teams, and delivering scalable, secure systems.

Responsibilities include designing scalable applications with Core Java and Spring Boot, building microservices, REST APIs, and cloud-native architectures using AWS/Azure/GCP, Docker,

Qualifications

• 8+ years of professional experience in Java development, backend engineering, or technical leadership.
• Strong hands-on expertise in Core Java, including Java 8/11/17+ features.
• Extensive experience with Spring Boot, microservices, and REST APIs.

Responsibilities

• Design, develop, and deliver scalable enterprise applications using Core Java, Java 8/11/17+, and Spring Boot.
• Design and implement robust microservices architectures with appropriate service boundaries and communication patterns.
• Develop secure and scalable REST APIs and event-driven solutions using Kafka, RabbitMQ, or similar messaging technologies.
• Architect cloud-native solutions using AWS, Azure, or GCP, along with Docker and Kubernetes.
• Lead technical discussions, architecture reviews, design sessions, and engineering decision-making.
• Mentor and guide developers, helping teams improve technical capabilities and problem-solving skills.

Skills

Core Java

Java 8/11/17+

Spring Boot

Microservices

Cloud tech

Architecture thinking

Technical leadership

REST APIs

Kafka

RabbitMQ

Docker

Kubernetes

AWS

Azure/GCP

SOLID & design patterns

Tools

Kafka

RabbitMQ

Docker

Kubernetes

SQL

NoSQL

AWS

Azure

GCP

Job description

Job Description:

This role is for one of the Weekdays clients

Salary range: ₹1500000 - ₹3500000 (ie INR 15-35 LPA)

Experience: 8+ yrs

Location: Bengaluru, Karnataka, India, Mumbai, Maharashtra, India

Job Type: Full-time

We are looking for an experiencedSenior Java Technical Leadwith 8+ years of strong hands-on experience in Java development, microservices, cloud technologies, system architecture, and technical leadership. The ideal candidate will combine deep expertise in the Java ecosystem with strong architectural thinking and the ability to lead complex engineering initiatives.

This role requires someone who can own end-to-end solution design, make sound technology decisions, troubleshoot complex production challenges, and guide engineering teams toward scalable, secure, and high-performance solutions.

Key Responsibilities

• Design, develop, and deliver scalable enterprise applications usingCore Java, Java 8/11/17+, and Spring Boot.
• Design and implement robustmicroservices architectureswith appropriate service boundaries and communication patterns.
• Develop secure and scalableREST APIsand event-driven solutions using Kafka, RabbitMQ, or similar messaging technologies.
• Design efficient data models and work withSQL and NoSQL databasesbased on application requirements.
• Architect cloud-native solutions usingAWS, Azure, or GCP, along with Docker and Kubernetes.
• Apply concurrency, multithreading, asynchronous processing, caching, messaging, and resiliency patterns to build high-performance systems.
• Analyse and optimise application performance, including JVM memory, garbage collection, CPU utilisation, and resource consumption.
• Identify and resolve memory leaks, performance bottlenecks, race conditions, deadlocks, and other complex production issues.
• Evaluate algorithms and data structures with a strong understanding oftime and space complexity.
• Apply SOLID principles, clean-code practices, and appropriate design patterns such as Factory, Strategy, Singleton, and Observer.
• Lead technical discussions, architecture reviews, design sessions, and engineering decision-making.
• Conduct code reviews and establish development standards, engineering practices, and quality guidelines.
• Mentor and guide developers, helping teams improve technical capabilities and problem-solving skills.
• Collaborate with architects, product owners, business stakeholders, and cross-functional teams to define effective technical solutions.
• Drive resolution of complex technical and production issues while balancing scalability, reliability, security, cost, and maintainability.
• Contribute to technology evaluations and make architecture decisions based on clear technical and business trade-offs.

What Makes You a Great Fit

• 8+ years of professional experiencein Java development, backend engineering, software architecture, or technical leadership.
• Strong hands-on expertise inCore Java, including Java 8/11/17+ features.
• Deep understandingofconcurrency, multithreading, synchronization, Executors, CompletableFuture, locks, and concurrent collections.
• Strong knowledge of JVM internals, memory management, garbage collection, profiling, and performance optimisation.
• Extensive experience withSpring Boot, Spring ecosystem, microservices, and REST APIs.
• Strong understanding of event-driven architecture and messaging technologies such asKafka or RabbitMQ.
• Experience withSQL and NoSQL databases, data modelling, query optimisation, and scalable data access.
• Strong understanding of distributed systems, scalability, high availability, fault tolerance, security, and resiliency.
• Hands-on experience withAWS, Azure, or GCP, along with Docker and Kubernetes.
• Strong knowledge of Java collections and internals, includingHashMap, ConcurrentHashMap, HashSet, equals(), and hashCode().
• Strong understandingofSOLID principles, design patterns, clean code, and software engineering best practices.
• Ability to analyse complex systems, identify bottlenecks, and make effective architecture and technology decisions.
• Proven experience leading technical discussions, design reviews, code reviews, and engineering initiatives.
• Strong mentoring and team leadership capabilities.
• Excellent communication skills with the ability to explain complex technical concepts to both technical and non-technical stakeholders.
• Strong ownership mindset with the ability to independently drive solutions from requirements through design, implementation, troubleshooting, and delivery.