Java Developer - Lead

We are seeking a skilled Java Developer with hands-on experience in Java and Spark to build scalable data processing solutions. You'll contribute to high-performance data pipelines and analytics platforms in a dynamic Agile environment.

Key Responsibilities

• Design and develop Java applications integrated with Apache Spark for ETL processes, data transformations, and analytics.
• Build and optimize Spark jobs (Spark SQL, DataFrames, Streaming) for large-scale data processing.
• Collaborate with data engineers and analysts to implement robust data workflows.
• Write clean, maintainable Java code following best practices (Spring Boot, Microservices preferred).
• Perform code reviews, unit testing, and contribute to CI/CD pipelines.
• Troubleshoot and optimize Spark performance for production workloads.
• Document technical solutions and mentor junior developers.

Required Skills & Qualifications

• 4-7 years of hands-on Java development experience.
• Strong expertise in Apache Spark (Spark Core, Spark SQL, PySpark basics).
• Proficiency in Java 8/11+ with multithreading and collections frameworks.
• Experience with data processing (ETL, data pipelines, big data).
• Familiarity with build tools (Maven/Gradle) and version control (Git).
• Strong problem-solving skills and Bangalore location availability.
• Excellent communication skills for cross-team collaboration.

Good to Have

• Experience with Snowflake for cloud data warehousing.
• Knowledge of DBT (Data Build Tool) for analytics engineering.
• Python scripting for data manipulation and automation.
• Exposure to AWS/GCP/Azure cloud platforms.
• Familiarity with Kafka, Airflow, or containerization (Docker/Kubernetes).

Job Title : Python Django Developer

Experience : 3+ Years

Location : Gurgaon Sector - 48

Working Days : 6 Days WFO (Monday to Saturday)

Job Summary :

We are looking for a skilled Python Django Developer with strong foundational knowledge in backend development, data structures, and operating system concepts.

The ideal candidate should have experience in Django and PostgreSQL, along with excellent logical thinking and multithreading knowledge.

Main Technical Skills : Python, Django (or Flask), PostgreSQL/MySQL, SQL & NoSQL ORM, Microservice Architecture, Third-party API integrations (e.g., payment gateways, SMS/email APIs), REST API development, JSON/XML, strong knowledge of data structures, multithreading, and OS concepts.

Key Responsibilities :

• Write efficient, reusable, testable, and scalable code using the Django framework
• Develop backend components, server-side logic, and statistical models
• Design and implement high-availability, low-latency applications with robust data protection and security
• Contribute to the development of highly responsive web applications
• Collaborate with cross-functional teams on system design and integration

Mandatory Skills :

• Strong programming skills in Python and Django (or similar frameworks like Flask).
• Proficiency with PostgreSQL / MySQL and experience in writing complex queries.
• Strong understanding of SQL and NoSQL ORM.
• Solid grasp of data structures, multithreading, and operating system concepts.
• Experience with RESTful API development and implementation of API security.
• Knowledge of JSON/XML and their use in data exchange.

Good-to-Have Skills :

• Experience with Redis, MQTT, and message queues like RabbitMQ or Kafka.
• Understanding of microservice architecture and third-party API integrations (e.g., payment gateways, SMS/email APIs).
• Familiarity with MongoDB and other NoSQL databases.
• Exposure to data science libraries such as Pandas, NumPy, Scikit-learn.
• Knowledge in building and integrating statistical learning models.

Java Technical Lead

We are solving complex technical problems in the financial 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.

Experience: 10+ years

Location: Mumbai

Job Description:

• Experience in Core Java, Spring Boot.

• Experience in microservices.

• Extensive experience in developing enterprise-scale systems for global organization. Should possess good architectural knowledge and be aware of enterprise application design patterns.

• Should be able to analyze, design, develop and test complex, low-latency client-facing applications.

• Good development experience with RDBMS in SQL Server, Postgres, Oracle or DB2

• Good knowledge of multi-threading

• Basic working knowledge of Unix/Linux

• Excellent problem solving and coding skills in Java

• Strong interpersonal, communication and analytical skills.

• Should be able 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.

We are India’s fastest-growing digital trust platform offering services such as background verifications, reference checks, employee/staff onboarding, etc. We have completed more than 500+ million checks across 3000+ happy clients and since its inception, the company has shown continuous uptrend growth in an ever-changing business environment. As an organization, we are self-sustainable with positive cash flows.

At OnGrid, we are focused on redefining and reimagining Trust. We are leveraging APIs to build a digital trust platform all while being accountable that provides verified credentials instantly coming from the source directly. Having built the basic pillars of trust, we now want our imaginations to be let loose and think of avenues not explored and ways never implemented before. In this pursuit, we are looking for a motivated Staff Engineer (Backend) with experience in building high-performing, scalable, enterprise-grade applications, joining us, driving this vision, and taking it to a larger scale. If you are a visionary, always on the lookout for finding the right solutions, and a technology geek, constantly seeking to learn and improve your skillset, then you are the type of person we are looking for.

Roles & Responsibilities -

● Develop new user-facing features.

● Work alongside product to understand our requirements, and design, develop and iterate, think through the complex architecture.

● Writing clean, reusable, high-quality, high-performance, maintainable code.

● Encourage innovation and efficiency improvements to ensure processes are productive

● Ensure the training and mentoring of the team members

● Ensure the technical feasibility of UI/UX designs and optimize applications for maximum speed.

● Research and apply new technologies, techniques, and best practices.

Requirements -

• Bachelors/Masters in Computer Science or a related field

• 5 - 10 years of prior relevant experience

• Experience with web technologies and microservices architecture

• Java, Spring framework

• MySQL, Mongo, Solr, Redis,

• Kubernetes, Docker

• Excellent teamwork skills, flexibility, and ability to handle multiple tasks.

• Experience with API Design, ability to architect and implement an intuitive customer and third-party integration story • Ability to think and analyze both breadth-wise (client, server, DB, control flow) and depth-wise (threads, sessions, space-time complexity) while designing and implementing services

• Exceptional design and architectural skills

• Experience of cloud providers/platforms like GCP and AWS

A primary source of raw materials for manufacturers globally. A raw material sourcing platform with a mission to be the primary source of raw materials for manufacturers globally. Their cross border supply chain and tech solutions ensures manufacturers have access to the best quality raw materials at the right price.

Job Description

As a Backend Engineer you will be responsible for creating REST APIs which are used to drive the User Interface. Given the nature of the application, these APIs need to be very efficient and high performing.

This requires optimizing queries for faster execution and introducing database changes that may be required. We are looking for individuals with great attention to detail, who are genuine, confident, committed and not only passionate about technology, but excited to work in a fun and friendly start-up environment. T

he ideal candidate will be passionate about technology and GETTING IT DONE.

Responsibilities include:

Develop, test, implement and maintain application software

Take part in software and architectural development activities

Debug application issues and helping support respond to client queries

Participate in application development meetings

Provide accurate estimates, clearly communicate status of tasks and identification of risks

Commitment to accomplishing the task at hand and identify the fastest and most reliable way to solve a problem

Performance tuning of application code at different service levels

Interact with customers of the application and help address issues reported

ESSENTIAL SKILLS / EXPERIENCE REQUIRED

1. Bachelor's degree in Computer Science or equivalent
2. 1-3 years of experience with Java and Spring frameworks.
3. Having good knowledge of a scripting language like python is a plus
4. Experience with Spring and Hibernate/ ORM
5. Understanding of relational databases and normal forms
6. Understanding of NoSQL / RDBMS (Mongo or Postgres) and ability to write optimized and high-performing queries
7. Strong understanding of Java concurrency, concurrency patterns, experience building thread-safe code
8. Experience building RESTful web services
9. Strong written and verbal communication skills
10. Strong interpersonal skills and time management skills
11. Strong problem-solving and analytical skills
12. Experience with GIT as a VCS, Unix-based systems
13. Experience with NoSQL Database is a plus Following are a set of 'good to have' skills
14. React AWS Bitbucket, JIRA

Java Developers

Exp: 3-5 years

Joining: 15-30 days

Skillset: Java, Microservices, Spring, Springboot, Hibernate

Responsibilities

• You will design and develop large scale distributed services
• You will analyse and improve the efficiency, scalability, stability, and security of the platform as a whole.
• You will act as the primary owner of one or more components while driving innovation in your area of ownership
• You will proactively research & evaluate new tools, technologies, and techniques to improve the value of the system.
• You will work with engineering leadership in solving and architecting solutions for challenging or complex development issues.
• You will work independently and handle dependencies with very minimal oversight
• You will take initiatives in developing and maintaining integrations of best practices within the back-end.
• You will help identify systemic issues, performance bottlenecks and work on design/architect improvements.

Requirements

• You have 1 - 9 years of experience in software development.
• You have designed and scaled up the system.
• You have a strong understanding of Data Structures and Algorithms.
• You are an incessant problem solver and tougher the problem gets, more fun you have.
• You have strong command in any one or more of the following languages: Python and Django
• You understand the business impact of your decisions.

Good To Have

• You have prior experience in fintech companies

Traits We Are Looking For

• Experience in a specific tech stack doesn't matter for us.
• The general engineering mindset and aptitude is what matters more.
• Technically strong and curious.
• Should have a hacker mindset and should love exploring new technologies.

Desired Skills and Experience

Java, Python, Data Structures, Algorithms