Java Backend Developer with Python Scripting at Wissen Technology · Mumbai · 3 - 7 years · Profitable · Posted 8 Oct 2025

Java/Python Developer(60% Java - 40% Python) - Mid Level Hands On Strong Developer
- 3 Years to 5 Years - Level 2
- 5 Years to 7 Years - Level 3
Location - Mumbai Commerz3 Office Only
He/She candidate must possess a strong technology background with advanced knowledge of Java
and Python based technology stack.
Java, J2EE, Spring MVC, Python, JPA, Spring Boot, REST API, Database, Playwright, CI/CD pipelines
. At least 3 years of Hand-on Java EE and Core Java experience with strong leadership qualities.
. Experience with Web Service development, REST and Services Oriented Architecture.
. Expertise in Object Oriented Design, Design patterns, Architecture and Application Integration.
· Working knowledge of Databases including Design, SQL proficiency.
. Strong experience with frameworks used for development and automated testing like SpringBoot, Junit, BDD etc.
. Experience with Unix/Linux Operating System and Basic Linux Commands.
. Strong development skills with ability to understand technical design and translate the same into workable solution.
. Basic knowledge of Python and Hand-on experience on Python scripting
. Build, deploy, and monitor applications using CI/CD pipelines.

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer 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.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Connect with the team
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About the Role
We are looking for a strong software engineer who actively uses AI to build better software faster. This is a backend-heavy engineering role where LLMs and AI systems are integrated into real production applications.
You will design, build, deploy, and maintain AI-enabled systems, while maintaining strong engineering discipline and code quality.
Key Responsibilities
- Architect and build scalable backend systems (Python / FastAPI preferred)
- Integrate LLM APIs, RAG pipelines, and AI workflows into production applications
- Deploy and maintain containerized applications on AWS/Azure
- Use AI coding assistants and agents to accelerate development, without compromising code quality
- Convert ambiguous requirements into production-ready systems
Must-Have Skills
- 7+ years of professional software engineering experience
- Strong Python backend experience
- Experience building REST APIs and production systems
- Solid understanding of system design and clean architecture
- Hands-on experience with Docker and Linux
- Experience deploying to AWS or Azure
- Experience integrating LLM APIs into applications
- Experience with embeddings / vector databases / RAG pipelines
- Strong Git and collaborative development workflows
- Ability to operate independently in ambiguous environments
Most importantly:
- Strong engineering fundamentals
- High ownership mindset
- Comfort using AI tools to move fast
- Discipline to maintain structure and quality
Good-to-Have
- Experience with real-time streaming or WebSockets
- Kubernetes deployment experience
- Experience in a fast-paced startup or consulting environment
- Familiarity with agent frameworks or voice/multimodal systems
Screening Requirement
Please include:
- A portfolio of systems you’ve built (especially AI-enabled systems), and
- A short note explaining how you use AI tools in your development workflow.
We are specifically looking for engineers who lean into AI agents and coding assistants, but still understand architecture, performance, and clean code.
Location: Bangalore
Experience: 2–5 years
Type: Full-time | On-site
Open Roles: 2
Start: Immediate
Why this role exists
Most systems work at a low scale.
Very few survive real production load, complex workflows, and enterprise edge cases.
We are building a platform that must:
- Scale from 500K → 20M+ interactions/month
- Handle complex insurance workflows reliably
- Become easier to deploy as it grows, not harder
This role exists to build the backend foundation that makes this possible.
What you’ll do
You will not just write services.
You will design and own core platform systems.
1. Scale the platform without breaking architecture
- Scale from 50K → 2M+ interactions/month
- Ensure:
- High availability
- Low latency
- Fault tolerance
- Avoid large rewrites — build systems that evolve cleanly
2. Build the workflow automation (WA) engine
- Design a flexible system with:
- States
- Stages
- Cohorts
- Dynamic workflows
- Ensure workflows:
- Handle edge cases reliably
- Can be configured easily
- Move from:
- Hardcoded flows → configurable execution engine
3. Build the insurance-specific data layer
- Design data models for:
- Policy states
- Claim workflows
- Consent tracking
- Ensure the system works across:
- Multiple insurers
- Multiple use cases
- Build a platform-first data layer, not use-case-specific hacks
4. Make deployment and setup simple
- Ensure workflows and data models are:
- Easy to configure
- Easy to launch
- Reduce friction for:
- Product teams
- Deployment teams
5. Create a compounding data advantage
- Build a data layer that:
- Improves with every deployment
- Captures structured signals
- Ensure data becomes a long-term edge, not just storage
6. Own production reliability
- Participate in on-call rotation across 3 engineers
- Ensure:
- Incidents are handled quickly
- Root causes are fixed permanently
- Build systems where reliability is shared, not individual
What success looks like
- Platform scales to 2M+ interactions/month smoothly
- Workflow engine supports complex, dynamic use cases
- Data layer enables fast deployment across accounts
- Edge cases are handled without constant firefighting
- System becomes easier to use as it grows
- Production issues are rare and predictable
Who you are
- You have 2-5 years of backend engineering experience
- You have built:
- Scalable systems
- Distributed services
- You think in:
- Systems
- Data models
- Trade-offs
- You are comfortable owning:
- Architecture
- Production systems
What will make you stand out
- Experience building:
- Workflow engines
- State machines
- Data-heavy platforms
- Strong understanding of:
- System design
- Distributed systems
- Failure handling
- Experience working in:
- High-scale production environments
Why join
- You will build the core backend of an AI platform
- Your work directly impacts:
- Scale
- Reliability
- Product capability
- You will design systems that move from:
- Use-case specific → platform-level infrastructure
What this role is not
- Not just API development
- Not limited to feature-level work
- Not disconnected from production realities
What this role is
- A system architect
- A builder of scalable platforms
- A driver of long-term technical advantage
One question to self-evaluate
Can you design backend systems that scale, handle edge cases, and become easier to use as they grow?
Preferred Qualifications
- Bachelor's degree in Engineering with specialization in Computer science or related field
- 4-10 years of experience as a software engineer in a product development setting
- Deep experience in Python with demonstrated ability to build modern products
- Experience in designing APIs and integration patterns, implementing secure and sustainable products with a focus on quality and scalability
- Experience in FastAPI, Django, or equivalent
- Experience in data modeling and efficient usage of PostgreSQL, MySQL, MongoDB, or equivalent
- Experience with modern components like async python, pedantic, sqlalchemy, alembic, celery, google products API integration, etc. is a plus
- Understanding of CI/CD practices including code check-in policies, automated unit tests, automated code deployments, etc.
- Experience in other programming languages is a plus, especially Javascript and/or Typescript
- Experience building feature-rich and scalable web apps is a plus
- Ability to grasp new technologies and use them effectively to create industrial-strength software
TAPPP is leading the charge in bringing premium digital entertainment content & live sports to global consumers via its prepaid platform. TAPPP is available across platforms via the Web, Mobile and Tablets. Building out this brand presents significant product and engineering challenges. At the centre of solving those challenges is the TAPPP Product Engineering team which is responsible for the TAPPP product end to end.
We are looking for a coding enthusiast who love working with code and developing software systems.
You will be a part of the core product development team that is responsible for building different components of the TAPPP platform. You will be responsible for designing, coding, reviewing, testing, bug-fixing different modules of the software product that needs to work seamlessly across different environments.
The organization is flat, process is minimal, individual responsibility is big, and there is an emphasis on keeping non-productive influences out of the everyday technical decision making process. Upholding these philosophies will be imperative as we execute our aggressive plan of global expansion over the next 2 years. The position is based in Mumbai, India.
Here is what we are looking for:
• Deep product development experience and sound understanding into these technologies
• Java/J2EE
• Spring
• Hibernate
• RESTful API's
• MySQL
• Tomcat 7
• Exposure on Grails & Amazon AWS will be a plus point
• Strong independent contributor
• An unquenchable desire to learn, attention to detail with a can-do attitude
• Comfortable working in a start-up environment
Job Overview:
We are looking for a Java Developer with experience in building high-performing, scalable,
enterprise-grade applications.
You will be part of a talented software team that works on mission-critical applications. Java
developer roles and responsibilities include managing Java/Java EE application development
while providing expertise in the full software development lifecycle, from concept and design to
testing.
Responsibilities and Duties:
• Contribute to all phases of the development lifecycle
• Write well designed, testable, efficient code
• Ensure designs should follow compliance with specifications
• Prepare and produce releases of software components
• Support continuous improvement by investigating alternatives and technologies and
presenting these for architectural review
Qualifications:
• BE/MCA/BCA/MS/BS degree in Computer Science, Engineering, or a related subject
• Minimum 1 to 4 years of experience
• Proven hands-on Software Development experience
• Proven working experience in Java development
• Hands on experience in designing and developing applications using Java EE
platforms
• Excellent knowledge of Relational Databases, SQL and ORM technologies (JPA2,
Hibernate)
• Experience in the Spring Framework
• Very good English communication skills
• Optional:
o Good to have the knowledge of Angular JS framework.
o Experience to work on the Micro service architecture.
o Experience to work with Git hub & bitbucket.
o Agile methodology.
We are looking for an experienced full-stack engineer to implement both back-end and front-end
software solutions to serve both internal and external customers. The position entails working in
an agile team to develop Java- and React-based projects that support our system.
● 1 - 4 yrs of Odoo development experience.
● Design, implement and test full-stack solutions using Java, Spring and React
● Design robust spring system that can support 2-5mil users.
● Work alongside other team members to integrate various components into finished
product
● Work closely with product owner to create stories
● Continuously create new and interactive features that would help to improve user
experience and user engagement.
● Assist with troubleshooting of issues as needed
● Participate in the design and architecture of software solutions
● Assist in developing and maintaining continuous integration pipelines
- 0 to 2 years of experience into Java 6/7/8, J2EE, EJB, Servlets, JSP, JDBC, LOG4J, SQL, PL/SQL, XML, XSLT, JSON,
- Good to have strong experience in Core Java SpringBoot, Spring framework
- knowledge of Spring MVC, Spring REST, JDBC Templates
- Knowledge of Java/J2EE Design patterns
- knowledge of implementation of WebServices like REST will be added advantage
- Good knowledge of Relational Databases like MySQL, PostgreSQL, MS SQL Server with complex SQL Queries, Stored Procedure, Triggers
- Knowledge of Unit Test Cases is added advantage
- Knowledge of build tools like Maven, Gradle, Ant
- Knowledge of any one or more of MongoDB, Cassandra, Neo4J, Redis, Kafka, ActiveMQ, Caches, Microservices will be a major plus
- Good to have knowledge of ORM like Hibernate
- Knowledge and experience in nodejs backend will be added advantage
Requirements :
- Must be a good team player and self-motivated Individual
- Very Strong analytical abilities and interpersonal skills
- Strong verbal and written communication skills with other developers and business clients
- High commitment levels
Main Duties
Contribute in all phases of the development lifecycle
Write well designed, testable, efficient code
Ensure designs are in compliance with specifications
Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review
Prepare and produce releases of software components
Role & Relationships
We consider ourselves a team & you will be a valuable part of it. You could be reporting to a Senior member or directly to our Founder, CEO
Educational Qualifications
We don’t discriminate. As long as you have the required skill set & the right attitude
Experience
Upto seven years of experience, preferably working on Java.
Skills
Good
Strong understanding of Core Java , Servlet, JSP
Knowledge of RDBMS (MySQL, Oracle, SQL Server), NoSQL
Knowledge of RESTful Web Services, XML, JSON, Spring
Good team player
Even better
Familiarity with the software development lifecycle
Strong Full stack developer development background with frontend and backend web applications
Competencies
An aptitude to solve problems & learn something new
Highly self-motivated
Analytical frame of mind
Ability to work in fast-paced, dynamic environment
Location
Currently in Pune
Remuneration
Once we meet, we shall make an offer depending on how good a fit you are & the experience you already have
About us
Aikon Labs Pvt Ltd is a start-up focused on Realizing Ideas. One such idea is iEngage.io, our Intelligent Engagement Platform. We leverage Augmented Intelligence, a combination of machine-driven insights & human understanding, to serve a timely response to every interaction from the people you care about.










