Backend Developer

JOB DESCRIPTION

Experience: 5-8 years

Location: Mumbai

Wissen Technology is now hiring for a Senior Java Developer - Bangalore with hands-on experience in Core Java, algorithms, data structures, multithreading and SQL. We are solving complex technical problems in the industry and need talented software engineers to join our mission and be a part of a global software development team. A brilliant opportunity to become a part of a highly motivated and expert team which has made a mark as a high-end technical consulting. 

Required Skills:

• Exp. - 5-8 years
• Experience in Core Java and Spring Boot.
• Extensive experience in developing enterprise-scale applications and systems. 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.
• Good knowledge of multi-threading and high-performance server-side development.
• Basic working knowledge of Unix/Linux.
• Excellent problem solving and coding skills.
• Strong interpersonal, communication and analytical skills.
• Should have the ability to express their design ideas and thoughts.

About Us:

At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide.

Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. 

We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. 

Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients the flexibility to adapt to their evolving business needs. Whether it’s AI/ML for unstructured data processing, cloud enablement, or data engineering, Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our proprietary Interview Ninja platform ensures we hire the best, building high-performing teams that deliver unmatched results. 

Today, Wissen Technology has a global footprint with 2200+ employees across offices in the US, UK, UAE, India, and Australia. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.

Website : www.wissen.com 

Job Title: Java Developer (Full-time)

Location: Pune (Onsite)

Experience Required: 3+ Years

Working Days: 5 Days (Mon to Fri)

Key Responsibilities:

• Design, develop, and deploy scalable microservices using Java and Spring Boot.
•  Implement RESTful APIs and integrate with external systems and databases.
• Build and manage services on AWS Cloud using components like ECS, Lambda, S3, RDS,
• and API Gateway.
• Collaborate with DevOps to integrate CI/CD pipelines for automated builds, tests, and
• deployments.
• Ensure application performance, reliability, and security in a cloud-native environment.
• Participate in code reviews, troubleshooting, and performance optimization.
• Work closely with architecture, QA, and product teams to deliver high-quality solutions.

Required Skills & Experience:

• Strong proficiency in Java, Spring Boot, and microservice architecture. 
• Hands-on experience with AWS Cloud services (ECS, EKS, Lambda, RDS, CloudWatch,etc.).
•  Knowledge of Docker, Kubernetes, and CI/CD tools (Jenkins, GitLab, or AWS
• CodePipeline).
• Experience with REST APIs, JSON, and message brokers (Kafka, RabbitMQ, or SNS/SQS).
• Proficiency in SQL and experience with relational databases (Oracle, MySQL, or
• PostgreSQL).
•  Familiarity with security best practices, monitoring, and logging in the cloud.

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

Key Responsibilities :

- Design, develop, and maintain Java-based applications using Java SE/EE.

- Implement, test, and deploy microservices and RESTful APIs using Spring Boot and related technologies.

- Develop efficient and scalable solutions by writing clean, maintainable, and optimized code.

- Collaborate with cross-functional teams to understand business requirements and provide technical solutions.

- Write and execute unit tests using JUnit to ensure code quality and functionality.

- Perform code reviews to ensure adherence to best practices and coding standards.

- Troubleshoot, debug, and optimize code for performance and scalability.

- Stay up to date with the latest Java technologies and development best practices.

Required Skills and Qualifications :

- Bachelor's degree in Computer Science, Engineering, or a related field.

- Years of experience in Java development (Java SE/EE, Spring, Hibernate).

- Strong experience with JUnit and test-driven development (TDD).

- Proficient in building microservices using Spring Boot and RESTful APIs.

- Experience with version control tools like Git.

- Familiarity with build tools such as Maven or Gradle.

- Strong understanding of object-oriented programming (OOP) principles.

- Familiarity with databases (SQL/NoSQL) and ORM frameworks (e.g., Hibernate).

- Experience with cloud platforms like AWS (preferably).

- Strong problem-solving skills and the ability to work in a collaborative environment.

Preferred Skills :

- Experience with continuous integration/continuous deployment (CI/CD) tools.

- Knowledge of containerization technologies like Docker.

- Familiarity with Agile methodologies and Scrum framework.

- Knowledge of front-end technologies (HTML, CSS, JavaScript) is a plus.

Requirements

• Extensive and expert programming experience in at least one general programming language (e. g. Java, C, C++) & tech stack to write maintainable, scalable, unit-tested code.

• Experience with multi-threading and concurrency programming.

• Extensive experience in object oriented design skills, knowledge of design patterns, and a huge passion and ability to design intuitive modules and class-level interfaces.

• Excellent coding skills - should be able to convert design into code fluently.

• Knowledge of Test Driven Development.

• Good understanding of databases (e. g. MySQL) and NoSQL (e. g. HBase, Elasticsearch, Aerospike etc).

• 4+ years of experience in the art of writing code and solving problems on a large scale.

• Open communicator who shares thoughts and opinions frequently, listens intently, and takes constructive feedback.

Responsibilities

- Software Engineering

- Design and develop highly scalable, available, reliable, secure and fault tolerant systems with minimal

guidance for a market leader in the logistics industry

- Partner with team members on functional and nonfunctional requirements and spread design

philosophy, goals and improve the code quality across the team

- Research new technologies and tools that enable building the next generation of our services

- Provide technology leadership to the team and foster engineering excellence

- Product Delivery

- Partner with product managers to define and execute on the feature roadmap

- Translate business requirements into scalable and extensible design

- Coordinate with various cross functional teams on planning and execution

- Maintaining automated build / test / deployment environments

Qualifications

- Software Engineering

- Should have at least 2 years of hands on experience in designing, developing, testing and deploying

applications on Java, Ruby, Kotlin, Python, Node or Go for large scale applications

- Deep knowledge of one of the programming language they have experience in

- Proficient in OOP and Design Patterns, experience with functional programming would be a plus

- Data modelling experience in Relational Databases

- Ability to design and implement low latency RESTful services

- Product Delivery

- Ability to scope, review and refine user stories for technical completeness and to alleviate dependency

risks.

- Well versed in working with agile methodologies which includes phases such as design, development,

code review, testing and release management

- Ability to have worked in a CI/CD environment, with hands on experience with Git or any similar source

code management tools

- Product Maintenance

- Experience troubleshooting server performance issues such as memory tuning, GC tuning, resource leaks

etc

- Continuously refactor applications to ensure high quality design.

Job Description:

• Resource should be proficient in analyzing, designing and developing applications based on the requirements provided by business counterparts
• Developing and maintaining applications developed in Java, J2EE, Struts and Spring and possessing 3-layer architecture
• Good knowledge in Spring Boot, Hibernate, Angular JS, Docker, VUE JS and AWS
• Applications development or maintenance using ORM tools such as Hibernate
• Database management which includes DB design and maintenance, mostly related to 2016 and Oracle 19c, DB2
• Should have knowledge in Unix / Linux OS.
• Should have good knowledge in Shell scripting language
• Strictly adhere to the internal SDLC process quality standards set but the organization and providing the drive to the team to achieve the KPI and SLA targets
• Flexible to work in extended time
• Candidate should have good experience on Java / J2EE, Springboot, Hibernate / JPA, Oracle query, Web Services and Rabbit MQ.
• Should have minimum of 3 to 5 years of experience. Should be able to work on enhancement, maintenance and production support.
• Good to have hands-on experience on DEVOPS & API development.

Job Title: ERPNext Developer 
Job Type: Full – Time
Location: Pune
Work Hours: 9: 00 AM to 6:00 PM
Min Salary: As per the Standard Market Rates

MAIN DUTIES/RESPONSIBILITIES:

PRIMARY RESPONSIBILITIES:
The candidate will be required to Design, Configure, Build, Test, Deploy and Maintain ERPNext and Frappe based applications:

• Gathering technical requirements for internal and external customers.
• Creation of documentation for software development and testing.
• Participation and use of Agile development methodologies
• Drive continuous improvement in development and operations best practices
• Ability to convey complex information in both written and oral form to technical and non-technical audiences

QUALIFICATIONS, EDUCATION, AND SKILLS:
Core qualifications:

• Excellent written and verbal communication skills
• Good interpersonal communication skills are needed in order to work successfully with prospects, customers, and cross-functional teams to meet development timelines
• Able to understand the complex business process and manage the project.
• Strong aptitude for learning new technologies and understanding how to utilize them in a customer-facing environment
• Hands-on experience in developing ERP applications from the ground up.
• Ability to follow standard engineering principles and practices
• Creative approach to problem-solving
• Working knowledge of object-oriented design and development skills.
• Commercial eCommerce portal development and maintenance is preferred. 
• 1-5 years of Experince is mandatory.

Technical qualifications:

• Experience in Frappe, ERPNext, JS, MySQL, Python & Frappe based web development. 
• Hands-on Product development over Frappe Framework, ERPNext
• Experience with workflows, access controls, page layouts, custom objects, custom record types, reports, and dashboards design and development
• Experience with Scrum/Agile development methodologies 
• OOP concepts and Backend Development Experience
• MySQL on MariaDB or equivalent
• Hands-on experience with hosting web application on Apache or NGINX
• Experience in UI/UX development for Web Applications is essential.
• Experience with one or more ERPNext Modules like Human Resources, CRM, Buying, Selling, Asset Management, Stock, Buying, Accounting, and Project.
• Senior position requires experience with multiple modules of ERPNext. 
• BS in computer science or technology equivalent preferred