Java Lead – Software Engineering

Python Developer - AI/MLYour Responsibilities

• Develop, train, and optimize ML models using PyTorch, TensorFlow, and Keras.
• Build end-to-end LLM and RAG pipelines using LangChain and LangGraph.
• Work with LLM APIs (OpenAI, Anthropic Claude, Azure OpenAI) and implement prompt engineering strategies.
• Utilize Hugging Face Transformers for model fine-tuning and deployment.
• Integrate embedding models for semantic search and retrieval systems.
• Work with transformer-based architectures (BERT, GPT, LLaMA, Mistral) for production use cases.
• Implement LLM evaluation frameworks (RAGAS, LangSmith) and performance optimization.
• Design and maintain Python microservices using FastAPI with REST/GraphQL APIs.
• Implement real-time communication with FastAPI WebSockets.
• Implement pgvector for embedding storage and similarity search with efficient indexing strategies.
• Integrate vector databases (pgvector, Pinecone, Weaviate, FAISS, Milvus) for retrieval pipelines.
• Containerize AI services with Docker and deploy on Kubernetes (EKS/GKE/AKS).
• Configure AWS infrastructure (EC2, S3, RDS, SageMaker, Lambda, CloudWatch) for AI/ML workloads.
• Version ML experiments using MLflow, Weights & Biases, or Neptune.
• Deploy models using serving frameworks (TorchServe, BentoML, TensorFlow Serving).
• Implement model monitoring, drift detection, and automated retraining pipelines.
• Build CI/CD pipelines for automated testing and deployment with ≥80% test coverage (pytest).
• Follow security best practices for AI systems (prompt injection prevention, data privacy, API key management).
• Participate in code reviews, tech talks, and AI learning sessions.
• Follow Agile/Scrum methodologies and Git best practices.

Required Qualifications

• Bachelor's or Master's degree in Computer Science, AI/ML, or related field.
• 2–5 years of Python development experience (Python 3.9+) with strong AI/ML background.
• Hands-on experience with LangChain and LangGraph for building LLM-powered workflows and RAG systems.
• Deep learning experience with PyTorch or TensorFlow.
• Experience with Hugging Face Transformers and model fine-tuning.
• Proficiency with LLM APIs (OpenAI, Anthropic, Azure OpenAI) and prompt engineering.
• Strong experience with FastAPI frameworks.
• Proficiency in PostgreSQL with pgvector extension for embedding storage and similarity search.
• Experience with vector databases (pgvector, Pinecone, Weaviate, FAISS, or Milvus).
• Experience with model versioning tools (MLflow, Weights & Biases, or Neptune).
• Hands-on with Docker, Kubernetes basics, and AWS cloud services.
• Skilled in Git workflows, automated testing (pytest), and CI/CD practices.
• Understanding of security principles for AI systems.
• Excellent communication and analytical thinking.

Nice to Have

• Experience with multiple vector databases (Pinecone, Weaviate, FAISS, Milvus).
• Knowledge of advanced LLM fine-tuning (LoRA, QLoRA, PEFT) and RLHF.
• Experience with model serving frameworks and distributed training.
• Familiarity with workflow orchestration tools (Airflow, Prefect, Dagster).
• Knowledge of quantization and model compression techniques.
• Experience with infrastructure as code (Terraform, CloudFormation).
• Familiarity with data versioning tools (DVC) and AutoML.
• Experience with Streamlit or Gradio for ML demos.
• Background in statistics, optimization, or applied mathematics.
• Contributions to AI/ML or LangChain/LangGraph open-source projects.

Hi,

As discussed, please refer to below Job description and revert with you updated resume –

About Client : Client is a digital accelerator to Startups, SMEs, MSMEs, and large enterprises with a significant contribution across 22+ industries including BFSI, Healthcare, Ecommerce & Retail, Education & eLearning, Insurance, Tech Startups, Government & Semi-Government, and more. Backed with an impressive experience of 25+ years and a fast-growing family of 4000+ engineering professionals our capabilities span across IT Consulting, Strategy Planning & Execution, Business Process Re-engineering, IT Modernization, and Business Analysis Consulting, our solutions are devised meticulously to address the needs of specific industries.

We are a CMMI Level 5 organization global IT Solution provider and Outsourcing company headquartered in Mumbai and footprints with 10 delivery centres in India and 15 global offices. Our success portfolio boasts of 7500+ projects accomplished across 1500+ clients in 50+ countries with client retention rate as high as 85%

Job Description :

Java Architect (10+ Years)

Location: Navi Mumbai, CBD Belapur

Domain: Banking (Payment Gateway Project)

NOTE: 1st and 3rd Saturdays working as per banking norms

Education: B.E. or Graduation in Computer Science or related field

Key Responsibilities:

• Architectural Leadership: Lead the architecture and design of complex, scalable, and secure banking applications, focusing on payment gateway solutions.

• Technology Stack Mastery: Provide expertise in Java, Spring, Spring Boot, Microservices, Hibernate, REST API, Oracle SQL, and cloud-native architectures using AWS.

• Spring Validation & Authorization: Ensure secure and validated input handling using Spring Validation, and implement robust authorization mechanisms with Spring Security.

• Cloud Integration: Design and implement cloud-native architectures using AWS, including services like EC2, S3, RDS, Lambda, and API Gateway.

• Security Standards: Ensure adherence to banking security st OAuth2, JWT, and encryption protocols.

• Database Design: Oversee the design and optimization of relational databases, focusing on Oracle SQL and knowledge of NoSQL databases like MongoDB.

• Performance Optimization: Implement strategies for application performance tuning, caching, and scalability.

• Collaboration & Mentorship: Work closely with cross-functional teams, providing technical guidance and mentoring to developers.

• Stakeholder Engagement: Collaborate with business stakeholders to ensure architectural alignment with business objectives and technical constraints.

• Code Quality & Reviews: Conduct regular code reviews, ensuring compliance with best practices and architectural standards.

Skills and Qualifications:

• Extensive Experience: 8+ years in Java development and architecture, with a proven track record in the banking domain, particularly in payment gateway projects.

•Technological Proficiency: Deep expertise in Java, Spring, Spring Boot, Microservices, Hibernate, REST API, Oracle SQL, Spring Validation, Spring Security for authorization, AWS, Docker, Kubernetes, and Jenkins.

• Cloud & DevOps Knowledge: Good understanding of cloud-native applications and DevOps practices.

• Security Focus: Experience in implementing security protocols and practices in a banking environment.

• Leadership & Communication: Strong leadership, communication, and stakeholder management skills.

• Innovative Thinking: Ability to think critically and provide innovative solutions to complex problems.

Required Documents:

• 10th and 12th passing certificates and marksheets.

• Graduation marksheets and passing certificate.

• Graduation degree (Convocation) certificate. • All employer offer letters and relieving letters (with stamp and CIN number on letterhead)

Regards

Amit Kumar Pandey

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.

Java Developer – Job Description

Wissen Technology is now hiring for a 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 Wissen Technology:

Wissen Technology is a niche global consulting and solutions company that brings unparalleled domain expertise in Banking and Finance, Telecom and Startups. Wissen Technology is a part of Wissen Group and was established in the year 2015. Wissen has offices in the US, India, UK, Australia, Mexico, and Canada, with best-in-class infrastructure and development facilities. Wissen has successfully delivered projects worth $1 Billion for more than 25 of the Fortune 500 companies. The Wissen Group overall includes more than 4000 highly skilled professionals.

Wissen Technology provides exceptional value in mission critical projects for its clients, through thought leadership, ownership, and assured on-time deliveries that are always ‘first time right’.

Our team consists of 1200+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like Wharton, MIT, IITs, IIMs, and NITs and with rich work experience in some of the biggest companies in the world.

Wissen Technology offers an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.

We have been certified as a Great Place to Work® for two consecutive years (2020-2022) and voted as the Top 20 AI/ML vendor by CIO Insider.

Responsibilities for Staff Engineer role:

• Having experience in Java/Python/Golang along with Springboot, Micorservices, RDBMS
• Experience required: 10yrs to 15 yrs.

• Building components for the company’s advanced health tech platform using Java, Solr, SpringBoot, DialogFlow
• Communicating effectively in a cross-functional product development team and presenting ideas and solutions effectively
• Prioritizing and managing workload and meeting critical project milestones and deadlines
• Effectively collaborating with a team as well as taking initiative and working independently to solve problems

Desired Candidate Profile

• Build large scale enterprise applications.
• Responsible for providing deep technical expertise in designing and delivering end to end high performance, scalable & flexible solutions using Java and Open Stack technologies including Mobility/Responsive Web apps, APIs, application & data Integration, scalable databases, DevOps, Cloud Computing.
• He/ She would be also responsible to experiment, explore and demonstrate application of new technologies by means of conducting quick prototypes to solve business problems. Work with the direction from Solution Architect/ Enterprise Architect and co-create solutions with rest of the IT delivery teams