Backend Developer

Job Title : Backend Developer (.NET Core)

Experience : 2 to 5 Years

Work Environment :

• Hybrid model : Minimum 3 days/week from office
• Office Location : Hauz Khas, Delhi
• Flexible working hours based on project needs

Job Summary :

We are looking for a skilled and motivated Backend Developer with 2–5 years of experience, proficient in .NET Core and experienced with cloud platforms (AWS preferred or Azure).

You will be responsible for building scalable backend services and RESTful APIs, integrating with cloud components, and ensuring robust data handling.

Key Responsibilities :

• Design, develop, and maintain robust backend systems using .NET Core 6 or above.
• Develop and manage Web APIs for frontend and third-party integrations.
• Work with cloud infrastructure (preferably AWS: Lambda, EventBridge, SQS, CloudWatch, S3; or Azure: AppService, Functions, AzureSQL, EventHub, Blob Storage).
• Work with databases such as SQL Server, PostgreSQL, and tools like PGAdmin.
• Utilize Entity Framework Core, Dapper, or equivalent ORM tools.
• Collaborate using Git or TFS for version control.
• Develop, debug, and maintain code in Visual Studio.
• Write optimized and scalable SQL queries and stored procedures.
• Participate in code reviews and maintain high code quality.

Required Skills :

• Proficient in .NET Core 6+.
• Experience with RESTful API development.
• Strong command of SQL and relational databases.
• Familiarity with cloud platforms (AWS preferred, Azure acceptable).
• Good understanding of Git/TFS.
• Hands-on experience with tools like Visual Studio, SQL Server, PGAdmin.
• ORM experience with Entity Framework Core, Dapper, or similar.

Nice to Have :

• Exposure to asynchronous processing or event-driven architecture.
• Experience working with Cursor-based data fetching or streaming.

Technical Expertise

• Proficiency in Node.js or Python – Hands-on experience with backend development frameworks and best practices.

• Expertise in SQL/NoSQL Databases – Strong experience with MySQL, PostgreSQL, MongoDB, or DynamoDB.

• ElasticSearch & API Development – Strong knowledge of REST APIs, ElasticSearch, and high-availability system design.

• Cloud & DevOps – Hands-on experience with AWS, Kubernetes, Docker, and CI/CD pipelines.

• Data Structures & Algorithms – Strong command over data structures, algorithms, OOD, and design patterns.

• Version Control & Deployment – Experience with Git, GitHub Actions, and other deployment systems.

• High-Performance Systems – Implemented solutions that handle high availability, concurrency, and low-latency requirements.

About Techjays

At Techjays, we build production-grade AI platforms for global clients. We operate at the intersection of backend engineering, distributed systems, and applied AI — delivering secure, scalable, and enterprise-ready intelligent systems. Our team has built and scaled products at Google, Akamai, NetApp, ADP, Cognizant, and Capgemini.

About the Role

This is not a feature-delivery role. We are looking for an AI Lead who can architect, own, and scale intelligent backend systems end-to-end. You will drive both technical direction and execution — working across LLM integrations, RAG pipelines, agentic AI workflows, and cloud-native backend systems for global clients.

What You'll Do

• Architect and scale backend systems powering AI-driven applications
• Design and implement RAG pipelines, AI agents, and LLM integrations
• Own systems end-to-end — from architecture to deployment and scaling
• Integrate and optimize LLMs (Claude, GPT, Gemini) for real-world production use cases
• Build high-performance distributed systems with observability and cost efficiency
• Lead backend and AI initiatives with strong technical ownership
• Mentor engineers and raise the technical bar across teams
• Collaborate with product and AI teams to deliver AI-native solutions

What We're Looking For

• 6–10 years of strong backend engineering experience
• Hands-on expertise in Python (FastAPI / Django / Flask)
• Deep understanding of Generative AI and LLM-based systems
• Strong experience with RAG pipelines and Vector Databases (Pinecone, FAISS, ChromaDB, Weaviate)
• Solid knowledge of Agentic AI — building autonomous agents and multi-agent workflows
• Proficiency in AWS or GCP in production environments
• Experience with distributed systems, microservices, and system design
• Strong grasp of Data Structures, Algorithms, and Design Patterns
• Familiarity with WebSockets, Git, Linux/Unix, and CI/CD

Nice to Have

• Experience with Anthropic Claude API and Claude Code
• Familiarity with real-time data systems or streaming (Kafka, etc.)
• MLOps and AI system lifecycle experience
• Optimizing AI systems for latency, cost, and scalability

Who You Are

• You think in systems, not just features
• You take full ownership of what you build
• You are comfortable navigating fast-moving, ambiguous environments
• You stay updated with the latest in Generative AI and backend technologies
• Strong communicator who can collaborate across teams and global clients

What We Offer

• Competitive compensation (Best in Industry)
• Work on production-grade AI systems used by global clients
• Exposure to cutting-edge AI tools and frameworks
• A culture that values clarity, integrity, and continuous growth

Strong Full stack/Backend engineer profile

Mandatory (Experience): Must have 2+ years of hands-on experience as a full stack developer (backend-heavy)

Mandatory (Backend Skills): Must have 1.5+ strong experience in Python, building REST APIs, and microservices-based architectures

Mandatory (Frontend Skills): Must have hands-on experience with modern frontend frameworks (React or Vue) and JavaScript, HTML, and CSS

Mandatory (AI): Must have hands on experience with using AI tools (eg: Claude, Cursor, GitHub Copilot, Codeium, Deepdcode) for coding

Mandatory (Database Skills): Must have solid experience working with relational and NoSQL databases such as MySQL, MongoDB, and Redis

Mandatory (Cloud & Infra): Must have hands-on experience with AWS services including EC2, ELB, AutoScaling, S3, RDS, CloudFront, and SNS

Mandatory (DevOps & Infra): Must have working experience with Linux environments, Apache, CI/CD pipelines, and application monitoring

Mandatory (CS Fundamentals): Must have strong fundamentals in Data Structures, Algorithms, OS concepts, and system design

Mandatory (Company) : Product companies (B2B SaaS preferred

Role: Sr. Java Developer

Experience: 6+ Years

Location: Bangalore (Whitefield)

Work Mode: Hybrid (2-3 days WFO)

Shift Timing: Regular Morning Shift

About the Role:

We are looking for a seasoned Java Developer with 6+ years of experience to join our growing engineering team. The ideal candidate should have strong expertise in Java, Spring Boot, Microservices, and cloud-based deployment using AWS or DevOps tools. This is a hybrid role based out of our Whitefield, Bangalore location.

Key Responsibilities:

• Participate in agile development processes and scrum ceremonies.
• Translate business requirements into scalable and maintainable technical solutions.
• Design and develop applications using Java, Spring Boot, and Microservices architecture.
• Ensure robust and reliable code through full-scale unit testing and TDD/BDD practices.
• Contribute to CI/CD pipeline setup and cloud deployments.
• Work independently and as an individual contributor on complex features.
• Troubleshoot production issues and optimize application performance.

Mandatory Skills:

• Strong Core Java and Spring Boot expertise.
• Proficiency in AWS or DevOps (Docker & Kubernetes).
• Experience with relational and/or non-relational databases (SQL, NoSQL).
• Sound understanding of Microservices architecture and RESTful APIs.
• Containerization experience using Docker and orchestration via Kubernetes.
• Familiarity with Linux-based development environments.
• Exposure to modern SDLC tools – Maven, Git, Jenkins, etc.
• Good understanding of CI/CD pipelines and cloud-based deployment.

Soft Skills:

• Self-driven, proactive, and an individual contributor.
• Strong problem-solving and analytical skills.
• Excellent communication and interpersonal abilities.
• Able to plan, prioritize, and manage tasks independently.

Nice-to-Have Skills:

• Exposure to frontend technologies like Angular, JavaScript, HTML5, and CSS.

We are looking for a Python Web Developer responsible for managing the interchange of data between the server and the users. Your primary focus will be the development of all server-side logic, ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for integrating the front-end elements built by your co-workers into the application; therefore, a basic understanding of front-end technologies is necessary as well.

• Writing reusable, testable, and efficient code
• Design and implementation of low-latency, high-availability, and performant applications
• Integration of user-facing elements developed by front-end developers with server side logic
• Implementation of security and data protection
• Integration of data storage solutions 

• Support existing code of PHP webserver
• Proficient in PHP, JavaScript, jQuery, HTML, and MySQL
• Hands-on any PHP-based framework/CMS like Laravel, CakePHP, Zend, CodeIgnitor, Yii.
• Must write efficient code with documentation.
• Any Database: MySQL, MongoDB, NoSQL DBs, postgresql.
• Has experience debugging code.
• Analysis of current DB structure and change table structures as and when required
• Implementation of visual representation of DB data in the form of charts and graphs
• The eventual implementation of a new UI theme with customizations such as drop-down menu data, as well as linking the UI theme front-end with the back-end MySQL
• Implementation of new PHP web services for functions such as analytics, and new modules to existing services
• Ensure cross-platform compatibility of information retrieved from web services on
• Android and iOS platforms, in terms of Push Notifications, platform-specific issues, etc.
• Implementation of SSL security to all web services, logins, and API calls
• Familiar with XMPP would be a plus point.

Backend - Software Development Engineer-III

Responsibilities:-

• Research, design and build highly reliable, available and scalable platforms
• Explore design implications and work towards an appropriate balance between functionality, performance, and maintainability.
• Lead by example, mentor and guide team members on everything from structured problem solving to development of best practices
• Own large technical deliverables and execute in an exemplary way
• Be able to conceptualize and develop prototype quickly
• Working with a cross-discipline team of Design, Product, Data Science and Analytics team.
• Active participation in the hiring process to bring quality engineers in the team.

Requirements:-

• Strong proficiency in Javascript and TypeScript
• Strong proficiency of Node.js and frameworks available for it such as Express
• Strong understanding and experience of creating highly scalable and complex database design
• Good understanding of Data Modeling using RDBMS and NoSQL(Cassandra, MongoDB, ElasticSearch, Redis) data stores
• Strong problem-solving skills with a good understanding of data structures and algorithms
• Strong understanding of front-end technologies, such as HTML5, and CSS3
• User authentication and authorization between multiple systems, servers, and environments
• Experience of creating highly scalable, fault tolerant, resilient distributed systems
• Strong knowledge of creating scalable system design and good understanding of microservice based architectures
• Understanding of caching enabled, PubSub and event driven architectures
• Hands on experience and good knowledge of AWS services
• Understanding automated testing platforms like selenium and unit tests like Chai, Mocha, Jasmine etc
• Proficient understanding of code versioning tools, such as Git
• E/B.Tech/M.E./M.Tech/M.S.
• Curiosity to explore the cutting edge technologies and bake them in the products.
• Zeal and drive to take end to end ownership.
• 5+ years of experience in back end development preferably in microservice environment.