BackEnd Engineer

Job Description:

We are looking for a highly experienced Java Developer with expertise in Spring Boot and Microservices architecture. The ideal candidate will have 4+ years of experience in building scalable, high-performance applications.

Key Responsibilities:

• Develop and maintain Java-based applications using Spring Boot and Microservices.
• Create and implement RESTful APIs and integrate with third-party services.
• Design and build scalable, resilient microservices.
• Perform code reviews and optimize applications for performance and security.
• Deploy and manage applications on cloud platforms (AWS, Azure, or GCP).
• Implement CI/CD pipelines for continuous integration and deployment.
• Diagnose and resolve technical issues and production bugs.

Required Skills:

•  Java 8+ or 11+ (strong proficiency)
•  Spring Boot, Spring MVC, Spring Security
•  Microservices architecture and distributed systems
•  RESTful APIs and API gateways
•  SQL and NoSQL databases (PostgreSQL, MongoDB, etc.)
•  Cloud platforms (AWS, Azure, or GCP)
•  Containerization (Docker, Kubernetes)
•  CI/CD pipelines (Jenkins, GitLab CI)
•  Message brokers (Kafka, RabbitMQ)

About the Role

At Techjays, we build production-grade AI systems for global clients. We are looking for a Solution Architect who can bridge the gap between client needs and technical delivery — someone who can walk into a client room, understand their business challenges, and walk out with a compelling, technically sound AI solution.

This role sits at the intersection of pre-sales, solutioning, and delivery governance.

What You'll Do

• Own end-to-end solutioning from client discovery to architecture design
• Partner with pre-sales teams on RFPs, proposals, and client presentations
• Define architectures for LLM integrations, RAG pipelines, and agentic workflows
• Conduct architecture reviews and technical assessments for ongoing projects
• Act as a trusted technical advisor to enterprise clients during pre-sales

Key Skills

• Python, REST APIs, Microservices, Distributed Systems
• AWS / Azure / GCP, Docker, Kubernetes, CI/CD
• LLM Integrations, RAG Pipelines, AI Agents, Vector Databases
• Enterprise data architecture and integration patterns
• Strong client communication and presentation skills

Who You Are

• Client-first mindset — listens, understands, and translates business pain into technical clarity
• Strong communicator comfortable with C-level stakeholders
• High ownership — accountable for every solution you sign off on
• Collaborative across sales, delivery, and engineering

What We Offer

• Flexible work environment
• Paid holidays & flexible time off
• Medical insurance (Self & Family up to ₹4 Lakhs)
• Exposure to global clients and high-impact pre-sales engagements
• A culture of clarity, integrity, and continuous growth

Wissen Technology is now hiring for Java Developer with hands on experience in Core Java, multithreading, algorithms, data structure and SQL skills .

Required Skills:

• Experience - 5 to 10 years.
• Experience in Core Java 5.0 and above, CXF, Spring.
• Extensive experience in developing enterprise-scale n-tier applications for financial domain. Should possess good architectural knowledge and be aware of enterprise application design patterns.
• Should have the ability to analyze, design, develop and test complex, low-latency client-facing applications.
• Good development experience with RDBMS, preferably Sybase database.
• Good knowledge of multi-threading and high-volume server-side development.
• Experience in sales and trading platforms in investment banking/capital markets.
• 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.

1. Need to have an understanding of Elastic Search, Kafka, mongo DB, etc.

2. Should have experience of Jupter noobooks, data bricks

3. Java, Pythons

4. Senior level, 5-10 years of experience

5. It is important they have those skills so that they can take over current work. There are codes written in both Java as well as Python. (Java is legacy but that is the main search engine code). So it will be counter-productive if engineers hired have experience in both.

6. Excellent communication, analytical, research, grasping skills

Must-haves

• Strong proficiency in NodeJS and JavaScript.

• Strong proficiency in top NodeJS frameworks like Express.JS (Simply Express), Feathers.JS, StrongLoop, Koa.JS, or Hapi.

• Good knowledge of SQL/NoSQL databases. Ability to develop services with polyglot persistence.

• Basic working knowledge of front-end technologies like HTML5 and CSS3.

• A strong presence of mind, excellent language, and communication skills.

1. Hands on experience in designing and developing applications using NodeJS and have at least 3 - 4
2. years’ experience on the same.
3. Should have excellent in-depth knowledge on Nodejs and Mongo DB.
4. Working knowledge of RESTful web services.
5. Basic understanding of front-end technologies, such as HTML5, and CSS3.
6. Integration of user-facing elements developed by front-end developers with server side logic
7. Design and implementation of low-latency, high-availability, and performant applications
8. Proficient understanding of code versioning tools, such as Git
9. Good communication skills.
10. Experience in working effectively within a team.

Responsibilities: 

• Design and code efficient, scalable systems that can accept feedback from multiple hundred thousand employees and generate insights 
• Design efficient and scalable event driven systems to process complex machine learning pipeline
• Experiment with data to come up with unique insights and that can benefit our clients
• Identify libraries and technologies worth experimentation
• Participate in brainstorming sessions to bring more value to our clients
• Investigate performance issues / scalability bottlenecks, existing queries and/or write new queries with performance optimization in mind
• Develop RESTful APIs that can be used by frontend to show insights
• Debug and fix production level bugs as and when they crop up
• Support ad hoc data analytics upon requests by clients, and believe us nothing creates a better DB understanding than handling ad hoc data requests 

Requirements: 

• 3+ years of experience in architecture and developing high performance web applications 
• Experience with systems ingesting/processing high amounts of data is a plus 
• In-depth understanding of the entire web development process (design, development, and deployment) 
• Experience with SQL and NoSQL database 
• Working knowledge of RESTful API paradigms  
• Experienced in microservices architecture  
• Solid engineering principles and a clear understanding of data structures and algorithms
• Passion for products, empathy for users, and aspiration to make a big impact
•  

Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.

As a senior software engineer, you will work on our python based ORM and applications that scales to handle millions of transactions every hour. This is mission critical software and your primary focus will be building robust and scalable solutions that are easy to maintain.

In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product are important.

What You’ll Do:

• Own definition and implementation of API interfaces (REST and GraphQL). We take pride in our 100% open API with over 600 endpoints.
• Implement simple solutions to complex business logic that enables our merchants to manage financials, orders and shipments across millions of transactions.
• Build reusable components and packages for future use.
• Translate specs and user stories into reviewable, test covered patches.
• Peer review code and refactor existing code.
• Integrate with our eCommerce partners (Shopify, BigCommerce, Amazon), shipping partners (UPS, USPS, FedEx, DHL) and EDI.
• Manage Kubernetes and Docker based global deployment of our infrastructure.

Requirements
We’re Looking for Someone With:

• Experience working with ORMs like SQLAlchemy or Django (2-3 years)
• Experience with SQL and databases (Postgres preferred)
• Experience in developing large server side applications and microservices
• Ability to create high quality code
• Experience with python testing tools (pytest) and test automation
• Familiarity with code versioning tools like GIT
• Strong sense of ownership and leadership quality
• Experienced in the tools of our web stack- Python, Celery, Postgres, Redis, RabbitMQ

Nice to Haves:

• Prior experience at a growth stage Internet/Software company
• Experience with ReactJS, Google Cloud, Heroku
• Cloud deployment and scaling experience