Lead Developer (Java)- Immediate Joiners

1) Be open to learn new frameworks like Hapi.JS , Typescript , Nest.JS

2) Strong DB concepts , and hands on knowledge on MongoDB , REDIS

3) Experience working with micro-services will be a plus

4) Experience working with JWT and IAM systems will be a plus

5) Experience working with Postman , Swagger will be a plus

6) TDD knowledge is an advantage and also working with Unit Test code and familiar with test code coverage concepts.

7) Strong operating system knowledge is a plus with knowledge of how to manage threads.

8) Working experience with RabbitMQ , Kafka will be a plus

9) Strong knowledge of JS internals is a must.

Java GS 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. - 2- 7 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 Java GS 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 

Strong Senior Backend Engineer profiles

Mandatory (Experience 1) – Must have 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems

Mandatory (Experience 2) – Must have strong backend development experience using one or more frameworks (FastAPI / Django (Python), Spring (Java), Express (Node.js).

Mandatory (Experience 3) – Must have deep understanding of relevant libraries, tools, and best practices within the chosen backend framework

Mandatory (Experience 4) – Must have strong experience with databases, including SQL and NoSQL, along with efficient data modeling and performance optimization

Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs, services, and backend systems, including system design and clean code practices

Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)

Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D

Mandatory (Education) – Candidates from top engineering institutes (IITs, BITS, or equivalent Tier-1 colleges) are preferred

Core AI Backend Engineer – LLM Fine-Tuning

You know that moment when you don’t just debug code — you train a model, fine-tune it, and suddenly it understands your domain better than you expected? That’s the kind of magic we’re looking for.

We’re building something that turns chaotic social video data into crystal-clear business intelligence. Not just another API — but AI-backed architecture fine-tuned to our world. Systems that marketing teams thank you for, because they feel the intelligence, not just the infrastructure.

Either you feel the craft when you read this, or you don’t. This isn’t just another backend role. This is where you bring together scalable systems and cutting-edge LLMs to build something the world hasn’t seen before.

Who We Are

We’re a small, global team that ships fast. Every line of code and every model choice affects millions of video analysis requests.

Our engineers don’t just build APIs — they architect solutions, they optimize at scale, and now, they fine-tune models to make AI work in the real world. Our CPTO still codes. Our senior engineers make complexity look effortless. Our backend team sets a standard that others ask how we move so fast.

What We Need

We need someone who’s lived both sides of this life:

• Backend excellence: building high-scale, high-performance systems.
• LLM fine-tuning: hands-on with open-source models, not just calling APIs.

Someone who can sit with a requirement at 2pm and by 6pm not only has endpoints working, but also has a fine-tuned model running behind them — customized to our use case.

Your Craft

• JavaScript/TypeScript & NodeJS as core backend tools.
• Next.js for full-stack where needed.
• Rust when performance is non-negotiable.
• Golang/Python as comfortable tools of choice.
• MySQL/Postgres/Redis — wielded with intention.
• AWS ecosystem — your playground, not your puzzle.
• LLM/AI integration you’ve actually shipped.
• Open-source LLM fine-tuning experience:
• Bringing in open-source models (LLaMA, Mistral, Falcon, etc.).
• Fine-tuning/adapting them for specific domains.
• Optimizing for inference cost, latency, and accuracy.

The Reality

The work is beautifully complex. The scale is real and growing. The problems are the kind that wake you up at 3am with solutions.

If you get your energy from building backend systems and adapting LLMs to make them smarter for real-world use, you’ll probably fall in love with what we do. If you’re only interested in APIs without touching models, this won’t be your thing — and that’s completely okay.

How to Apply

If you’re reading this thinking “finally, a team that actually cares about real AI engineering” — we’d love to see something you’ve built.

Not just a resume. Show us your craft:

• An LLM fine-tuning repo.
• A domain-adapted model you worked on.
• A system design where you combined backend and AI.
• Or even a short write-up or voice note explaining what you’ve fine-tuned.

We’re genuinely excited to see what you’ve done and have a meaningful conversation about whether this could be magic for both of us.

Online group buying platform that helps people connect with likeminded people who want to buy the same item/product at a discounted price.

• Overlook development of all consumer products in JAVA and
• Optimize components for maximum performance across a vast array of web-capable devices and
• Focus on code maintainability and performance of
• Provide technical advice and assists in solving programming
• Continuously create new and interactive features that would help to improve user experience and user engagement.
• Assist with troubleshooting of issues as
• Lead the design and architecture of software
• Assist in developing and maintaining continuous integration.

• Skills required: JAVA, Python (Flask and Django), Spring/Spring Boot, React, Hibernate,
• 2+ years of experience in Java and Python
• Linux, REST, Kafka, Mysql,, AWS, ELK Stack (Elasticsearch), CI/CD
• Good experience in Java and/or Python based
• Experience in designing databases and system
• Experience in building products from scratch at well-funded start-ups

Requirements

• 2+ years of experience in the Development of JAVA technology.
• Strong Java Basics
• Linux
• SpringBoot or Spring MVC
• Hands-on experience in Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
• Proficient in REST API development
• Messaging Queue (RabitMQ or Kafka)
• Microservices
• Java 8
• Any Caching Mechanism
• Good at problem-solving

Good to Have Skills:

• 2+ years of experience in using Java/J2EE tech stacks
• Good understanding of data structures and algorithms.
• Excellent analytical and problem-solving skills.
• Ability to work in a fast-paced internet start-up environment.
• Experience in technical mentorship/coaching is highly desirable.
• Understanding AI/ML algorithms is a plus.

Software Architect

Bangalore, India / Engineering/ Full-time

Job Overview:

As a Software Architect, you will play a crucial role in designing, developing, and maintaining robust and scalable backend solutions for our software applications. You will be responsible for making strategic technical decisions, and collaborating with cross-functional teams to ensure the successful delivery of high-quality software products with scalable backend infrastructure. 

Responsibilities:

• System Architecture:
• Design and architect scalable, efficient, and maintainable backend systems.
• Collaborate with cross-functional teams to understand business requirements and translate them into technical specifications.
• Technical Leadership:
• Provide technical leadership and guidance to the development team, ensuring best practices and coding standards are followed.
• Mentor and coach team members, fostering a culture of continuous learning and improvement.
• Backend Development:
• Lead the development of backend components, modules, and features primarily on Ruby on Rails tech stack and also be open to contribute in other tech stacks based on Java/Kotlin and Python.
• Implement and maintain APIs, data models, and database structures to support application functionality.
• Performance Optimization:
• Identify and address performance bottlenecks, ensuring optimal system response times and resource utilization.
• Implement caching strategies and other performance optimization techniques.
• Collaboration:
• Collaborate with frontend developers, product managers, and other stakeholders to integrate frontend and backend components seamlessly.
• Participate in code reviews to ensure code quality, adherence to standards, and knowledge sharing within the team.
• Security and Compliance:
• Implement and enforce security best practices to safeguard sensitive data.
• Stay updated on industry trends and emerging technologies to ensure compliance and security standards are met.
• Documentation:
• Create and maintain comprehensive technical documentation for the backend architecture, APIs, and development processes.
• Continuous Improvement:
• Proactively identify opportunities for process improvement and contribute to the evolution of development methodologies and practices.

Qualifications:

• Overall 10+ years of experience, with 2+ years as a Software Architect with a focus on backend development using Ruby on Rails.
• In-depth knowledge of Ruby on Rails framework, database design, and API development.
• Strong understanding of software architecture principles, design patterns, and best practices.
• Experience with performance optimization, scalability, and security considerations.
• Excellent communication and collaboration skills.
• Leadership experience with a demonstrated ability to mentor and guide development teams.
• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent work experience).

Bonus points:

• Familiarity with front-end technologies and frameworks(ReactJs).
• Experience with other programming languages.(Kotlin/Python)
• Experience with cloud platforms and microservices architecture.
• Knowledge of DevOps practices and tools.(AWS, Kubernetes, )

Join us in revolutionizing the way software solutions are developed, and contribute to building cutting-edge applications that make a positive impact on our users and the industry.

• Good understanding and experience of HTML / CSS / JavaScript.
• Hands-on experience with ES6 / ES7 / ES8 features.
• Thorough understanding of the Request Lifecycle (including Event Queue, Event Loop, Worker Threads, etc).
• Familiarity with security principles including SSL protocols, data encryption, XSS, CSRF.
• Expertise in Web Services / REST APIs will be beneficial.
• Proficiency in Linux and deployment on Linux are valuable.
• Knowledge about ORM like Sequelize and ODM like Mongoose and the ability to handle DB transactions is a necessity.
• Experience with Angular JS / React JS will be an added advantage.
• Expertise with RDBMS like MySQL / PostgreSQL will be a plus.
• Knowledge of AWS services like S3, EC2 will be helpful.
• Understanding of Agile and CI/CD will be of value.

• Designs, develops, modifies, debugs, and evaluates programs for functional areas
• Analyzes existing programs or formulates logic for new systems
• Devises logic procedures
• Prepare Flowcharting
• Performs coding and tests/debugs programs.
• Develops Conversion and System implementation plans
• Prepares and obtains approval of system and programming of documentation
• Recommends changes in development, maintenance, and system standards
• Train users in conversion and implementation of system
• Communicate with end users and understands the requirements in clearly.

• Bachelor’s or master’s degree in engineering / MCA with 5+ years of solid software development experience using .Net environment using C#, VB.NET, ASP.NET, ADO.NET.
• Experience working with Manufacturing Execution System (Camstar) is a plus.
• Experience working with Web services and XML/ XSLT.
• In Depth knowledge of MS-SQL 2005/2008 including coding of SPs.
• Has a Solid background of Object-Oriented Analysis and Design and the use of UML views and diagrams.
• Has the ability to design and document software applications with minimal supervision.
• Experience in multi-platform software Development (DOS, Windows).
• Experience in developing software applications in a multi-tier architecture.
• Experience in presentation layer development using JavaScript, HTML, DHTML, Ajax and CSS.
• Experience in WCF / MVC is a plus.
• Experience is in Source Controls like SVN / TFS.
• Able to handle all phases of SDLC.