Java Solution Lead

Required Skill Set

Software Engineer/Senior Software Engineer/Lead Engineer-Java

• Experience in Core Java 8.0 and above, Data Structures, OOPS, Multithreading, Algorithms, Collections, Unix/Linux
• Possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyse, design, develop and test complex, low-latency client-facing applications.
• Good development experience with RDBMS
• Good knowledge of multi-threading and high volume server side development
• Basic working knowledge of Unix/Linux
• Excellent problem solving and coding skills in Java
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

Responsibilities

• Understand product requirements and come up with solution approaches
• Build and enhance large scale domain centric applications
• Deploy high quality deliverables into production adhering to the security, compliance and SDLC guideline.

Job Details

- Job Title: Senior Backend Engineer

- Industry: SAAS

- Function – Information Technology

- Experience Required: 5-8 years

- Working Days: 6 days a week, (5 days-in-office, Saturdays WFH)

- Employment Type: Full Time

- Job Location: Bangalore

- CTC Range: Best in Industry

Preferred Skills: AWS, NodeJS, RESTful APIs, NoSQL

Criteria

· Minimum 5+ years in backend engineering with strong system design expertise

· Experience building scalable systems from scratch

· Expert-level proficiency in Node.js

· Deep understanding of distributed systems

· Strong NoSQL design skills

· Hands-on AWS cloud experience

· Proven leadership and mentoring capability

· Preferred candidates from SAAS/Software/IT Services based startups or scaleup companies

Job Description

The Role:

What You’ll Build:

1. System Architecture & Design

● Architect highly scalable backend systems from the ground up

● Define technology choices: frameworks, databases, queues, caching layers

● Evaluate microservices vs monoliths based on product stage

● Design REST, GraphQL, and real-time WebSocket APIs

● Build event-driven systems for asynchronous processing

● Architect multi-tenant systems with strict data isolation

● Maintain architectural documentation and technical specs

2. Core Backend Services

● Build high-performance APIs for 3D content, XR experiences, analytics, and user interactions

● Create 3D asset processing pipelines for uploads, conversions, and optimization

● Develop distributed job workers for CPU/GPU-intensive tasks

● Build authentication/authorization systems (RBAC)

● Implement billing, subscription, and usage metering

● Build secure webhook systems and third-party integration APIs

● Create real-time collaboration features via WebSockets/SSE

3. Data Architecture & Databases

● Design scalable schemas for 3D metadata, XR sessions, and analytics

● Model complex product catalogs with variants and hierarchies

● Implement Redis-based caching strategies

● Build search and indexing systems (Elasticsearch/Algolia)

● Architect ETL pipelines and data warehouses

● Implement sharding, partitioning, and replication strategies

● Design backup, restore, and disaster recovery workflows

4. Scalability & Performance

● Build systems designed for 10x–100x traffic growth

● Implement load balancing, autoscaling, and distributed processing

● Optimize API response times and database performance

● Implement global CDN delivery for heavy 3D assets

● Build rate limiting, throttling, and backpressure mechanisms

● Optimize storage and retrieval of large 3D files

● Profile and improve CPU, memory, and network performance

5. Infrastructure & DevOps

● Architect AWS infrastructure (EC2, S3, Lambda, RDS, ElastiCache)

● Build CI/CD pipelines for automated deployments and rollbacks

● Use IaC tools (Terraform/CloudFormation) for infra provisioning

● Set up monitoring, logging, and alerting systems

● Use Docker + Kubernetes for container orchestration

● Implement security best practices for data, networks, and secrets

● Define disaster recovery and business continuity plans

6. Integration & APIs

● Build integrations with Shopify, WooCommerce, Magento

● Design webhook systems for real-time events

● Build SDKs, client libraries, and developer tools

● Integrate payment gateways (Stripe, Razorpay)

● Implement SSO and OAuth for enterprise customers

● Define API versioning and lifecycle/deprecation strategies

7. Data Processing & Analytics

● Build analytics pipelines for engagement, conversions, and XR performance

● Process high-volume event streams at scale

● Build data warehouses for BI and reporting

● Develop real-time dashboards and insights systems

● Implement analytics export pipelines and platform integrations

● Enable A/B testing and experimentation frameworks

● Build personalization and recommendation systems

Technical Stack:

1. Backend Languages & Frameworks 

●  Primary: Node.js (Express, NestJS), Python (FastAPI, Django)

●  Secondary: Go, Java/Kotlin (Spring)

●  APIs: REST, GraphQL, gRPC

2. Databases & Storage

● SQL: PostgreSQL, MySQL

● NoSQL: MongoDB, DynamoDB

● Caching: Redis, Memcached

● Search: Elasticsearch, Algolia

● Storage/CDN: AWS S3, CloudFront

● Queues: Kafka, RabbitMQ, AWS SQS

3. Cloud & Infrastructure: 

● Cloud: AWS (primary), GCP/Azure (nice to have)

● Compute: EC2, Lambda, ECS, EKS

● Infrastructure: Terraform, CloudFormation

● CI/CD: GitHub Actions, Jenkins, CircleCI

● Containers: Docker, Kubernetes

4. Monitoring & Operations 

● Monitoring: Datadog, New Relic, CloudWatch

● Logging: ELK Stack, CloudWatch Logs

● Error Tracking: Sentry, Rollbar

● APM tools

5. Security & Auth

● Auth: JWT, OAuth 2.0, SAML

● Secrets: AWS Secrets Manager, Vault

● Security: Encryption (at rest/in transit), TLS/SSL, IAM

What We’re Looking For:

1. Must-Haves

● 5+ years in backend engineering with strong system design expertise

● Experience building scalable systems from scratch

● Expert-level proficiency in at least one backend stack (Node, Python, Go, Java)

● Deep understanding of distributed systems and microservices

● Strong SQL/NoSQL design skills with performance optimization

● Hands-on AWS cloud experience

● Ability to write high-quality production code daily

● Experience building and scaling RESTful APIs

● Strong understanding of caching, sharding, horizontal scaling

● Solid security and best-practice implementation experience

● Proven leadership and mentoring capability

2. Highly Desirable

● Experience with large file processing (3D, video, images)

● Background in SaaS, multi-tenancy, or e-commerce

● Experience with real-time systems (WebSockets, streams)

● Knowledge of ML/AI infrastructure

● Experience with HA systems, DR planning

● Familiarity with GraphQL, gRPC, event-driven systems

● DevOps/infrastructure engineering background

● Experience with XR/AR/VR backend systems

● Open-source contributions or technical writing

● Prior senior technical leadership experience

Technical Challenges You’ll Solve:

● Designing large-scale 3D asset processing pipelines

● Serving XR content globally with ultra-low latency

● Scaling from thousands to millions of daily requests

● Efficiently handling CPU/GPU-heavy workloads

● Architecting multi-tenancy with complete data isolation

● Managing billions of analytics events at scale

● Building future-proof APIs with backward compatibility

Why company:

● Architectural Ownership: Build foundational systems from scratch

● Deep Technical Work: Solve distributed systems and scaling challenges

● Hands-On Impact: Design and code mission-critical infrastructure

● Diverse Problems: APIs, infra, data, ML, XR, asset processing

● Massive Scale Opportunity: Build systems for exponential growth

● Modern Stack and best practices

● Product Impact: Your architecture directly powers millions of users

● Leadership Opportunity: Shape engineering culture and direction

● Learning Environment: Stay at the forefront of backend engineering

● Backed by AWS, Microsoft, Google

Location & Work Culture:

● Location: Bengaluru

● Schedule: 6 days a week, (5 days-in-office, Saturdays WFH)

● Culture: Builder mindset, strong ownership, technical excellence

● Team: Small, highly skilled backend and infra team

● Resources: AWS credits, latest tooling, learning budget

JOB DESCRIPTION:

Location: mumbai, bangalore, pune

Mode of Work : 3 days from Office

DSA(Collections, Hash maps, trees, Linkedlist and Arrays, etc), Core Oops concepts(Multithreading, Multi Processing, Polymorphism, Inheritance etc) Annotations in Spring and Spring boot, Java 8 Vital features, database Optimization, Microsevices and Rest API

• Design, develop, and maintain low-latency, high-performance enterprise applications using Core Java (Java 5.0 and above).
• Implement and integrate APIs using Spring Framework and Apache CXF.
• Build microservices-based architecture for scalable and distributed systems.
• Collaborate with cross-functional teams for high/low-level design, development, and deployment of software solutions.
• Optimize performance through efficient multithreading, memory management, and algorithm design.
• Ensure best coding practices, conduct code reviews, and perform unit/integration testing.
• Work with RDBMS (preferably Sybase) for backend data integration.
• Analyze complex business problems and deliver innovative technology solutions in the financial/trading domain.
• Work in Unix/Linux environments for deployment and troubleshooting.

Required Skills & Experience:

• 3– 8 years of strong hands-on experience in Core Java, Spring boot, microservices, data structures.
• Deep understanding of Object-Oriented Programming (OOP), data structures, algorithms, and design patterns.
• Proven experience with Spring, CXF, and REST/SOAP web services.
• Solid understanding of microservices architecture and distributed systems.
• Experience working with Sybase or other relational databases.
• Expertise in multithreading, concurrency, and high-throughput server-side development.
• Exposure to capital markets, sales & trading platforms, or similar financial services applications.
• Good working knowledge of Unix/Linux environments.
• Experience in solution architecture and design documentation is a strong plus.
• Strong problem-solving skills, analytical thinking, and a proactive attitude.
• Excellent communication and interpersonal skills to work effectively with global teams.

Preferred Qualifications:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
• Previous experience in investment banking, capital markets, or financial technology domains.

For more details:

Website: www.wissen.com

Wissen Thought leadership : https://www.wissen.com/articles/

LinkedIn: Wissen Technology

Key Responsibilities:

• Design, develop, and maintain robust and scalable backend applications using Core Java and Spring Boot.
• Build and manage microservices-based architectures and ensure smooth inter-service communication.
• Integrate and manage real-time data streaming using Apache Kafka.
• Write clean, maintainable, and efficient code following best practices.
• Collaborate with cross-functional teams including QA, DevOps, and product management.
• Participate in code reviews and provide constructive feedback.
• Troubleshoot, debug, and optimize applications for performance and scalability.

Required Skills:

• Strong knowledge of Core Java (Java 8 or above).
• Hands-on experience with Spring Boot and the Spring ecosystem (Spring MVC, Spring Data, Spring Security).
• Experience in designing and developing RESTful APIs.
• Solid understanding of Microservices architecture and related patterns.
• Practical experience with Apache Kafka for real-time data processing.
• Familiarity with SQL/NoSQL databases such as MySQL, PostgreSQL, or MongoDB.
• Good understanding of CI/CD tools and practices.
• Knowledge of containerization tools like Docker is a plus.
• Strong problem-solving skills and attention to detail.

Responsibilities

Build distributed, highly available, and fault-tolerant applications using Java, Spring, Kafka, and other technologies

Build large-scale and highly available APIs, both internal and external

Build, deploy, release, and support applications in the early stages

Skills

Must have

Overall 10+ years of experience as a Java Developer

Core Java 10+ years

Good hands-on coding skills

Must have experience in investment banking-related projects

Should have working experience in Trading life cycle project

Spring framework 5+ years

Kafka or other messaging

Knowledge of key APIs: JPA, JTA, CDI, etc.

Knowledge of various design and architectural patterns

Understanding of microservices architecture

Containerization solutions (e.g. Docker, Kubernetes, OpenShift)

Building tools (e.g. Maven, Gradle)

Version Control (e.g. Git)

Continuous Integration systems (e.g. TeamCity, Jenkins)

Experience in the finance industry and work with the Fintech community

Exp-Min Year

Location Kolkata-On site & Remote

Sal-Nego

JD

Hands on design and in depth development experience in Microsoft NET

·        technologies including C#, ASP NET MVC, Web API, Entity Framework and LINQ

·        knowledge of MS SQL Server 2014 above

·        Experience with version control systems GIT

·        Experience creating and consuming web services including REST JSON

·        Skills (Technical / Specialist Skills)

·        Proficiency in .NET Development with .NET Framework 4.5 or later, Asp.net MVC,

·        C#, Web API, LINQ, Entity Framework, SQL Server 2014 or above, jQuery.

Lead Software Engineer - Backend

It is evolving the way people discover the world by connecting them with exceptional experiences in their city at the push of a button. We are building a magical platform that gets everyone to head out and have fun in a matter of seconds; no matter where you are and what you want to do. We are combining a delightful product experience, data-driven decisions, sophisticated supply side logistics network, and world-class operations to solve a huge basic human problem: how do we have a good time?

We’re growing rapidly with over $200M in annualized sales, 150,000 monthly transactions and profitable unit economics. We are backed by some of the finest investors in Silicon Valley & India. 

We like to solve real-world problems in the simplest, most elegant manner possible. We’re looking for a QA Lead with the ability and passion for building solutions to people-centered problems that are created at the intersection of human behavior and technology. You should also be capable of building and mentoring a fast-growing passionate, young, and talented team. We love folks who have a sense of humor and know how to have fun.Dream, build and iterate. That's our mantra. Because good just isn't good enough.

👩‍💻 The Role

• Full responsibility of designing and building core modules on the application and infrastructure layer.
• Lead a fast-growing team of young, passionate, talented and fun loving superstars.
• Solve challenging architectural and design problems.
• Get your hands dirty with clustering, replication, databases, build systems and infrastructure automation etc.
• Be responsible for building concurrent, performant and scalable services which will power the entire Headout ecosystem.
• Build and contribute to open-source libraries and components.

🌟 Our Dream Engineer

• A penchant for learning and building with new technologies and frameworks.
• You love working with people and have worked in a lead position in the past.
• A knack for writing the most performance optimized code along with it being modular and scalable.
• No challenge is too big to solve; love thinking product and excited to ideate & build stuff all by yourself.
• You're interested in being an early employee at a growing company, with the influence and responsibility that entails.
• You have broad and deep knowledge across a variety of contemporary technologies.

💝 We like

• Strong CS fundamentals, good working knowledge of classic algorithms and data structures.
• 2+years experience developing server-side technologies using any language or framework.
• Excellent communication, collaboration and people management skills.
• Experience working with Spring, Relational Databases, Concurrent Programming, NoSQL flavors, AWS.
• Experience designing scalable, fault-tolerant systems and databases.
• Experience with setting setting up systems and infrastructure.
• Solid understanding of how the web works and its underlying communication protocols.
• People who can't live without solving that algorithm problem that they just stumbled upon.
• People who will give up anything to squeeze in that last bit-level performance.
• Anything else than can surprise us.
• Nice to Haves: An interest in travel, local experiences & hospitality.

Key Responsibilities: 

• Rewrite existing APIs in NodeJS. 
• Remodel the APIs into Micro services-based architecture. 
• Implement a caching layer wherever possible. 
• Optimize the API for high performance and scalability. 
• Write unit tests for API Testing.
• Automate the code testing and deployment process.

Skills Required:

• At least 2 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds. 
• Excellent hands-on experience using MySQL or any other SQL Database. 
• Good knowledge of MongoDB or any other NoSQL Database. 
• Good knowledge of Redis, its data types, and their use cases. 
• Experience with graph-based databases like GraphQL and Neo4j. 
• Experience developing and deploying REST APIs. 
• Good knowledge of Unit Testing and available Test Frameworks. 
• Good understanding of advanced JS libraries and frameworks. 
• Experience with Web sockets, Service Workers, and Web Push Notifications. 
• Familiar with NodeJS profiling tools. 
• Proficient understanding of code versioning tools such as Git. 
• Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms. 
• Should be a fast learner and a go-getter — without any fear of trying out new things Preferences. 
• Experience building a large scale social or location-based app.

Responsibilities:

• Responsible for developing Web Applications/ Rest Apis/ Automation Scripts.
• Design, Develop, Enhance and test Back End Web Modules using Nodejs, Nestjs Framework, Mongo DB.
• Research and explore existing solutions, competition to get a holistic understanding of the design and development.
• Communicate and collaborate effectively with various teams for effective outcomes.
• Meet deadlines in a high intensity work environment.
• Write Highly scalable and stable code.
• Pick up any project & amp; suggest a solution for completing it.
• Write production ready code with minimal bugs.
• Review other engineers' code and provide constructive feedback.
• Help grow the engineering team through involvement in the technology community (conferences, meetups, blog posts, open-source projects, etc) and referrals.
• Monitor changes in production & amp; rollback if necessary.
• Pair often and provide some guidance to more junior engineers.

Requirements:

• 2-6 years of working experience in backend technologies.
• Proficient in NodeJs, NestJs, Js.
• Understanding of Backend End Technologies.
• Proficient in RESTful APIs and API Communications.
• Understanding of Sql and NoSql Databases.
• Good grasp of Asynchronous Programming and its work arounds.
• Database schema Creation for business process.
• Working knowledge in user authentication and authorization.
• Implementing data protection Error Handling skills
• Good at analyzing and solving problems.
• Passionate to work in a start-up.
• Knowledge of firebase authentication and analytics.
• Knowledge of AWS deployment tools and strategy.
• Should be good with the Low Level and High Level Design.
• Understanding of Different Design Patterns.