Senior Java Developers

Designing, building, and automating ETL processes using AWS services like Apache Sqoop, AWS S3, AWS CLI, Amazon 

EMR, Amazon MSK, Amazon Sagemaker. 

∙Developing and maintaining data pipelines to move and transform data from diverse sources into data warehouses or 

data lakes. 

∙Ensuring data quality and integrity through validation, cleansing, and monitoring ETL processes. 

∙Optimizing ETL workflows for performance, scalability, and cost efficiency within the AWS environment. 

∙Troubleshooting and resolving issues related to data processing and ETL workflows. 

∙Implementing and maintaining security measures and compliance standards for data pipelines and infrastructure. 

∙Documenting ETL processes, data mappings, and system architecture. 

Overview:

We're looking for a Full Stack Developer with strong backend expertise who can build,

manage, and scale AI-driven products end to end. You'll play a critical role in designing

scalable architectures, optimizing performance and cost, and building robust AI and agentic

systems.

Responsibilities

1. Architect and build scalable backend systems using FastAPI, PostgreSQL, and Redis.

2. Design, develop, and maintain AI-driven applications, integrating multiple LLMs, APIs,

and agentic frameworks.

3. Implement vector databases (pgvector, Qdrant, etc.) for RAG and AI memory systems.

4. Orchestrate multi-agent AI systems with LangChain/LangGraph, including function

calling, agent collaboration, and monitoring.

5. Build and integrate RESTful APIs for frontend and external use.

6. Manage DevOps workflows, including CI/CD, cloud deployments (AWS/GCP), server

scaling, and logging/monitoring (Sentry).

7. Optimize application cost, latency, and reliability, balancing speed with LLM call

efficiency and caching strategies.

8. Collaborate with product, design, and AI teams to translate business requirements into

high-performing tech.

9. Maintain documentation and ensure code quality with tests, reviews, and async-first

architecture.

10. Contribute to frontend development (React + TypeScript) when necessary, ensuring

seamless API integration and data visualization.

Requirements

Core Skills

• Strong proficiency in Python and FastAPI.

• Experience with PostgreSQL (including pgvector) and SQLAlchemy (async).

• Solid understanding of Redis, RQ (Redis Queue), and caching mechanisms.

• Proven experience integrating LLMs and AI APIs (OpenAI, Anthropic, etc.).

• Hands-on experience with LangChain / LangGraph, RAG pipelines, and agent

orchestration.

• Experience working with cloud platforms (AWS / GCP) and managing file storage (S3).

• Familiarity with frontend stacks (React, TypeScript, Tailwind, Zustand).

• Working knowledge of DevOps: Docker, CI/CD pipelines, deployment automation, and

observability tools (Sentry, Mixpanel, Clarity).

Bonus / Nice to Have

• Experience building agent monitoring dashboards or AI workflows.

• Prior experience in startup or product-based environments.

• Understanding of LLM cost optimization, token management, and function calling

orchestration.

• Familiarity with external API integrations like BrightData, Hunter.io, Adzuna, and Serper.

• Experience building scalable AI products (e.g., chatbots, AI copilots, data agents, or

automation tools).

Mindset

• Startup-ready: comfortable working in fast-paced, ambiguous environments.

• Deep curiosity about AI systems and automation.

• Strong sense of ownership and accountability for shipped products.

• Pragmatic and cost-conscious in architectural decisions.

• Excellent communication and documentation skills.

Company Name – Wissen Technology

Location :  Pune / Bangalore / Mumbai (Based on candidate preference)

Work mode: Hybrid 

Experience: 5+ years

Job Description

Wissen Technology is seeking an experienced C# .NET Developer to build and maintain applications related to streaming market data. This role involves developing message-based C#/.NET applications to process, normalize, and summarize large volumes of market data efficiently. The candidate should have a strong foundation in Microsoft .NET technologies and experience working with message-driven, event-based architecture. Knowledge of capital markets and equity market data is highly desirable.

Responsibilities

• Design, develop, and maintain message-based C#/.NET applications for processing real-time and batch market data feeds.
• Build robust routines to download and process data from AWS S3 buckets on a frequent schedule.
• Implement daily data summarization and data normalization routines.
• Collaborate with business analysts, data providers, and other developers to deliver high-quality, scalable market data solutions.
• Troubleshoot and optimize market data pipelines to ensure low latency and high reliability.
• Contribute to documentation, code reviews, and team knowledge sharing.

Required Skills and Experience

• 5+ years of professional experience programming in C# and Microsoft .NET framework.
• Strong understanding of message-based and real-time programming architectures.
• Experience working with AWS services, specifically S3, for data retrieval and processing.
• Experience with SQL and Microsoft SQL Server.
• Familiarity with Equity market data, FX, Futures & Options, and capital markets concepts.
• Excellent interpersonal and communication skills.
• Highly motivated, curious, and analytical mindset with the ability to work well both independently and in a team environment.

Education

• Bachelor’s degree in Computer Science, Engineering, or a related technical field.

Job Description

We are seeking a skilled Full-stack developer. As a Full-stack developer, you will collaborate with an international cross-functional teams to design, develop, and deploy high-quality software solution.

Responsibilities:

Design, develop, and maintain the application.

Write clean, efficient, and reusable code.

Implement new features and functionality based on business requirements.

Participate in system and application architecture discussions.

Create technical designs and specifications for new features or enhancements.

Write and execute unit tests to ensure code quality.

Debug and resolve technical issues and software defects.

Conduct code reviews to ensure adherence to best practices.

Identify and fix vulnerabilities to ensure application integrity.

Working with the product owner to ensure seamless integration of user-facing elements.

Collaborating with DevOps teams for deployment and scaling.

Requirements:

Bachelor’s degree in computer science or information technology, or a related field.

Proven experience as a skilled Full-stack developer. Experience in Insurance domain is appreciated.

Excellent problem-solving and debugging skills.

Strong communication and collaboration abilities to work effectively in a team environment.

Strong experience with Spring Boot 3, Java 17 or newer and Maven.

Skills & Requirements

Angular 18+, GitHub, IntellJ IDEA, Java 11+, Jest, Kubernetes, Maven, Mockito, NDBX/ng-aquila, NGRX, Spring Boot, State Management, Typescript, Playwright, PostgreSQL, Sonar, Swagger, AWS, Camunda, Dynatrace, Jenkins, Kafka, NGXS, Signals, Taly.

• We are looking for a Full-Stack Developer with exceptional development skills, who is motivated to combine the art of design with the art of programming. You’ll be part of a cross-functional, remote team that’s responsible for the full software development life cycle, from conception to deployment.
• As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks, and third-party libraries.
• You should also be a team player with a knack for visual design and utility.

You have experience in tackling organization wide challenges which are complex initiative that span multiple teams and products. Strong bias for operational and engineering excellence. critical that your voice is heard in product and business decisions. You like to find patterns that can reuse across multiple stacks, and willingness to help organisations adopt newer technologies. You are a great communicator and you take care setting high benchmarks in technical design choices. You spend a lot of time on research and love to discuss pros/cons of all choices and helping others towards making careful decisions.

Responsibilities:

• You will participate in all aspects of our development and provide expertise on architecture decisions we'll need to make to solve organisational problems.
• Driving technical roadmaps for the organisation.
• Set the north star for all key technical metrics to monitor and set high standards.
• Identify and articulate current state architecture and clarity on final state architecture and build organisation level influence to drive this to conclusion.
• Coaching / mentoring folks across the organisation on various technologies.
• Improve the recruiting and hiring process.
• Thinks about culture and how to impact it.
• Build, develop and scale our platform that powers real estate agents, buyers and sellers.
• Become a domain expert on real estate technology and products and an empathetic partner to our customers.
• Inspire, recruit and mentor your engineering colleagues.
• Operate in a scalable engineering culture that leverages modern principles of decoupled systems and automated CI/CD/testing/monitoring to drive. efficiencies.

Requirements:

• BS in CS or EE or equivalent.
• Proven track record working in top talent and high performance environments.
• Experience working on large scale systems in rapid growth environments.
• Experience with modern web frameworks (e. g. Go/React), distributed computing (e. g. Spark), public cloud platforms (e. g. AWS) and data pipelines
• Familiarity with containerisation, microservices architecture, continuous integration and delivery.
• Experience with multiple well-known products throughout their life cycles, from idea conception to product release and maintenance.
• 10+ years experience.

• Published Engineering blogs.
• Experience with multiple well-known products throughout their life cycles, from idea conception to product release and maintenance.
• External presentations in events.

Essential duties and responsibilities include the following. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Work on a remote cross-functional team where you’ll play a critical role in designing, planning, development, deployment and observing your code in production.   
• Develop high performance, highly scalable and accessible web applications. Our web app is used by over 20 million educators, students and parents worldwide.  
• Meet tight deadlines in a rapid application development environment.  
• Collaborate with Product Management, Design, and Operations teams to create and deliver tested features to production.  
• Collaborate with specialists across web, mobile, and operations to achieve a better user experience for our product.  
• Be able to assess and bring in industry information into your decisions and learn new technologies: AWS is releasing new tools every day, there are new open source libraries to vet and you will be a party to helping us vet and pick the best tool for the job.  
• Be willing to work in any area of the codebase if needed, this can include JavaScript/TypeScript/Node, PHP, Java or other technologies.  
• Help staff, build, and form the culture around a team of 5 engineers, a product manager, designer, QAs and associated supporting roles.

Qualifications include:

• Strong CS fundamentals including familiarity with data structures and especially the asynchronous challenges that face JavaScript developers today.   
• Experience developing in at least 2 server side languages (PHP, node.js, …)  
• Experience developing in at least 1 client side JS framework (ReactJS, Angular, …)  
• Experience testing software in alignment with the Test Pyramid.  
• Experience with datastores, either SQL (MySQL preferred) or NoSQL, and the ability to talk deeply about them.  
• Able to identify the source of complex problems occurring as a result of multiple systems interacting (experience with observability tools such as datadog/newrelic is a plus).   
• Experience working on a team of 5 engineers plus supporting roles (e.g. QA, design, etc), preferably as a Senior Software Engineer.  
• Experience with code review, being able to sign-off on another team member’s code ensuring high quality standards.  
• Be self-sustained even when tackling the highest profile, most difficult work across the organization.  
• Willingness to accept responsibility and be accountable not only for your own work but the work of the team as a whole.  
• Experience working with other people’s code, how to dig into it and make tactical changes with minimal side effects.  
• A solid understanding of how to break down user stories and give estimates that include accessibility and security requirements.  
• Be able to see roadblocks far ahead, across many vectors of risk  
• Be a true team player! Ensuring their knowledge and expertise is shared amongst other team members and even cross-team and be willing to seek out opportunities to mentor teammates.  
• A commitment to learning about anything you don’t know on your own and without much supervision.  
• Superior communications, organization and relationship building skills — you’re going to be working on cross-team efforts, so this is essential.  
• Self-motivation as well as ability and desire to learn new technologies, applications, processes, and environments.  
• A belief that delivering code to production is just one step in the process. Observing and owning the code you wrote goes hand in hand with construction.  
• A desire to take on whatever challenge is most important. This could be tackling something you are familiar with, or it could require a deep dive into a whole new world. The key is having the right attitude.