Java Technical Lead

JOB DESCRIPTION

Experience: 5-8 years

Location: Mumbai

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.

Role & Responsibilities

As a Founding Engineer, you'll join the engineering team during an exciting growth phase, contributing to a platform that handles complex financial operations for B2B companies. You'll work on building scalable systems that automate billing, usage metering, revenue recognition, and financial reporting—directly impacting how businesses manage their revenue operations.

This role is ideal for someone who thrives in a dynamic startup environment where requirements evolve quickly and problems require creative solutions. You'll work on diverse technical challenges, from API development to external integrations, while collaborating with senior engineers, product managers, and customer success teams.

Key Responsibilities

• Build core platform features: Develop robust APIs, services, and integrations that power billing automation and revenue recognition capabilities.
• Work across the full stack: Contribute to backend services and frontend interfaces to ensure seamless user experiences.
• Implement critical integrations: Connect the platform with external systems including CRMs, data warehouses, ERPs, and payment processors.
• Optimize for scale: Design systems that handle complex pricing models, high-volume usage data, and real-time financial calculations.
• Drive quality and best practices: Write clean, maintainable code and participate in code reviews and architectural discussions.
• Solve complex problems: Debug issues across the stack and collaborate with cross-functional teams to address evolving client needs.

The Impact You'll Make

• Power business growth: Enable fast-growing B2B companies to scale billing and revenue operations efficiently.
• Build critical financial infrastructure: Contribute to systems handling high-value transactions with accuracy and compliance.
• Shape product direction: Join during a scaling phase where your contributions directly impact product evolution and customer success.
• Accelerate your expertise: Gain deep exposure to financial systems, B2B SaaS operations, and enterprise-grade software development.
• Drive the future of B2B commerce: Help build infrastructure supporting next-generation pricing models, from usage-based to value-based billing.

Ideal Candidate Profile

Experience

• 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems.
• Strong backend development experience using one or more frameworks: FastAPI / Django (Python), Spring (Java), or Express (Node.js).
• Deep understanding of relevant libraries, tools, and best practices within the chosen backend framework.
• Strong experience with databases (SQL & NoSQL), including efficient data modeling and performance optimization.
• Proven experience designing, building, and maintaining APIs, services, and backend systems with solid system design and clean code practices.

Domain

• Experience with financial systems, billing platforms, or fintech applications is highly preferred.

Company Background

• Experience working in product companies or startups (preferably Series A to Series D).

Education

• Candidates from Tier 1 engineering institutes (IITs, BITS, etc.) are highly preferred.

JD Java Developer:

· Looking for a Senior Java Developer.

· Open Positions - 1

· Experience Required 8+yrs.

· Rich Expertise in Java frameworks like Spring MVC, Spring boot, Hibernate, and Microservices.

. Hands on experience with React.

· Knowledge in JavaScript, CSS and HTML5 etc. added advantage.

· Knowledge in database and SQL skills.

· Communicating with client/product owner for requirement gathering.

· Estimating the tasks and preparing plan for development.

· Strong analytical, logical skills and team leading skills.

. Knowledge in cloud based technologies (AWS, GCP).

About the Company:

We are a Series A funded Indonesian online group buying platform that helps people connect with like minded people who want to buy the same item/product at a discounted price.  The team is spread across India and Indonesia, and is led by experienced founders who have founded, set-up, scaled and exited businesses across India and Indonesia. We have raised our first round of funding, and are growing extremely fast. We are actively looking for Full Stack developers to join our team.

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.

• 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

Salary range : 15 lpa - 30 lpa or more depending on candidate experience.

Skills required : 

You will be best qualified if you have experience with several (not all) of the following:

• JAVA
• Python (Flask and Django)
• Spring/Spring Boot
• React
• Hibernate
• Linux
• REST
• Kafka
• Mysql
• AWS
• ELK Stack (Elasticsearch)
• CI/CD Pipelines

Qualifications:

• 2+ years of experience in Java based technologies
• 1+ years of experience in Python
• Experience in designing databases and system architecture 
• 1+ years of experience in Front end technologies like HTML, CSS, JavaScript and ReactJs

Why join us?

• You will get to work with an experienced team who has worked in multiple startups. 
• Experimenting is the name of the game. And POCs are the snacks that fuel them.
• Grow with us. It is a family
• Gain exposure to two of the fastest growing markets in the world - South East Asia and Social Commerce

Job Role-12 months(contract) which is extendable /permnanent

Required Skills:

• Advanced Java skills, Spring, Spring Boot, REST APIs,
• Intermediate in Design Patterns and Principles
• Application is moving into PCF  any cloud native experience is helpful
• DB:  Oracle, SQL Server, RDBMS
• Network Infrastructure knowledge is helpful (work with network support team to troubleshoot)
• Production support skills are highly preferred.
• CI/ CD knowledge is helpful
• Junit for unit testing
• Java certifications are a huge plus

Job Description:

• An ideal candidate is someone who works well with a cohesive team-oriented group of engineers, who have a passion for developing software, who enjoy solving problems in a challenging environment, and who have the desire to take their career to the next level.
• Participate in and lead day to day system development and maintenance activities of the team to meet service level agreements (SLAs) and create solutions with high level of innovation, cost effectiveness, high quality and faster time to market.
• Accountable for full systems development life cycle including creating high quality requirements documents, use-cases, design and other technical artifacts including but not limited to detailed test strategy/test design, performance benchmarking, release rollout and deployment plans, contingency/back-out plans, feasibility study, cost and time analysis and detailed estimates.
• Research and evaluate current and upcoming technologies and frameworks.
• Participate in PoCs (Proof of Concept) and help the Department with selection of Vendor Solutions, Technologies, Methodologies and Frameworks.
• Collaborate with Vendor Resources for Support of Products.
• Conduct brownbag sessions on new and upcoming technologies, methodologies and application appropriate frameworks. Ensure knowledge transfer of vendor technology to *** staff. Provide technical training to the other team members.
  
  

Qualifications:

• Bachelor's degree in Information Systems, Information Technology, Computer Science or Engineering or equivalent work experience.
• 3 to 5 years of experience in related field.
• Broad understanding of Software Engineering Concepts and Methodologies is required.
• Back end Java Development
• API- Restful Services
• Automated Unit Testing (J Unit)
• Spring MVC
• SQL skills- Ability to work with tables, views, and stored procedures
• GIT
• Must be high-energy, detail-oriented, proactive and have the ability to function under pressure in an independent environment.
• Must provide the necessary skills to have a high degree of initiative and self-motivation to drive results.
• Possesses strong communication skills -- both verbal and written and strong relationship, collaborative skills and organizational skills.
• Willingness and ability to learn and take on challenging opportunities and to work as a member of matrix based diverse and geographically distributed project team.

• Experience in Java and associated technologies Core Java, JSP, Spring, Struts,RESTful Services,SOAP,Tomcat, Hibernate, Maven
• Strong understanding of OOPS concepts
• Proficient understanding of RDBMS Concepts
• Strong understanding of Databases Oracle / MSQL / MySQL etc and PL/SQL Programming

• Create a platform to change the way kids learn: Because company is solving a unique problem, we have the chance to reimagine education. Be it collaboration or puzzles or interactive videos or even 3D experiences, there is a huge scope for innovation. You can help us get there.
• Tackle challenging and impactful problems: You'd jump between product, marketing, internal tools, process — participating in every phase from inception to implementation. Absolutely no boredom.
• Join us at a magical time: We went through Y Combinator, have raised funding and are seeing strong traction with a very lean team. You get to be among the first employees in one of the strongest and most passionate teams in the EdTech space.

So, what will you do as a Full Stack Lead at company?

• As one of the early employees, there will be a lot on your plate. All the time!
• You'll take ownership and build new product features from start to finish. We love to hire ‘Product Engineers’ who care about “why” behind a feature and suggest changes to hit the objectives even better
• You'll build improvements to performance, reliability, and product polish — for example, improving the efficiency and performance of our replicated state systems.
• You will mentor new joiners, review the pull requests and help with expanding the team as we grow

This might be for you if...

• You have strong knowledge of both front and back end technologies
• You have been professionally coding for at least 4 years
• You have worked in a startup and relish the chaos and pressure
• You've built and maintained quality user interfaces that have reached a large audience, ideally while the product is experiencing rapid growth.
• You can readily learn most technologies as you go. To you, technologies are about tools and tradeoffs, not an ideology.
• You care about the business implications of anything you build. You're not just going after cool stuff — you understand the balance between craft, speed, and the bottom line.
• Bonus: You're fluent with Typescript, Python, Go, NodeJS, Postgres, Docker.
• Bonus: You're familiar with multiple frameworks such as React, Django
• Bonus: You understand AWS infrastructure and can put out a fire if one happens

Job Description-

Backend Developer- Senior

Experience - 3-6 years

Location: Pune/Kota

Minimum Qualifications:

- BE/B.Tech or ME/M.Tech in Computer Science.

- Must have “Can Do Attitude” towards work

- Must have work exp of 3-6 years

- Must have programming exp of 1-2 years in any of Python/Golang/Java languages

- Must have worked in product based company

- Ready to work in a startup and adaptable to a dynamic environment

- Ready to accept ad-hoc requirements and track them till they get implemented

- Ready to learn new technologies like Andriod, Angular, etc.

- Good at HTTP basics, OOPs concepts, data structures, algorithms, networking and

security aspects

- Ability to write clean code and maintain it

- Good at SQL/No-SQL databases

Preferred Qualifications:

- Experience in any good product based startup

- Experience in working with the team and managing a small team of 2-5 associates

- Experience in being a mentor for co-developers

- Experience in design/developing scalable systems.

- Experience in public cloud platforms services/APIs of AWS, Google Cloud, etc.

- Experience in data engineering

- Experience in SOA/Microservice architecture development

Responsibilities:

- Design and develop scalable services and APIs in Python/Golang

- Always maintain the services secure

- Should optimize APIs for mobile data and apps

- Use off-the-shelf and state-of-the-art services for faster development of product

- Guide team members with designs

- Take the end to end ownership of features and resolve customer issues on priority

- Mentor/guide/monitor junior developer

- Expertise Android/Angular to the required extent and guide app developers while

designing APIs

Opportunities in the role:

- LearnAngular, Python, Node.js, Golang, ELK stack, MEAN/MERN

- Work on AWS, Azure, Google Cloud Platform

- Work on databases like RDS, MongoDB, Big Table & DynamoDB, Redis, Aerospike

- Experience with SQL/ NoSQL Databases (RDS, DynamoDB, Google Datastore, Redis)

- Experience with ELK stack.

- Fast prototyping of proof-of concept features/application based on a brief

- Work on data engineering