Java Developer

Location : Bengaluru, India

Type : Full-time

Experience :4-7 Years

Mode :Hybrid

The Role

We're looking for a Full Stack Engineer who thrives on building high-performance applications at scale. You'll work across our entire stack—from optimizing PostgreSQL queries on 140M+ records to crafting intuitive React interfaces. This is a high-impact role where your code directly influences how sales teams discover and engage with prospects worldwide.

What You'll Do

• Build and optimize REST APIs using Django REST Framework handling millions of records
• Design and implement complex database queries, indexes, and caching strategies for PostgreSQL
• Develop responsive, high-performance front-end interfaces with Next.js and React
• Implement Redis caching layers and optimize query performance for sub-second response times
• Design and implement smart search/filter systems with complex logic
• Collaborate on data pipeline architecture for processing large datasets
• Write clean, testable code with comprehensive unit and integration tests
• Participate in code reviews, architecture discussions, and technical planning

Required Skills

• 4-7 years of professional experience in full stack development
• Strong proficiency in Python and Django/Django REST Framework
• Expert-level PostgreSQL knowledge: query optimization, indexing, EXPLAIN ANALYZE, partitioning
• Solid experience with Next.js, React, and modern JavaScript/TypeScript
• Experience with state management (Zustand, Redux, or similar)
• Working knowledge of Redis for caching and session management
• Familiarity with AWS services (RDS, EC2, S3, CloudFront)
• Understanding of RESTful API design principles and best practices
• Experience with Git, CI/CD pipelines, and agile development workflows

Nice to Have

• Experience with Elasticsearch for full-text search at scale
• Knowledge of data scraping, ETL pipelines, or data enrichment
• Experience with Celery for async task processing
• Familiarity with Tailwind CSS and modern UI/UX practices
• Previous work on B2B SaaS or data-intensive applications
• Understanding of security best practices and anti-scraping measures

Our Tech Stack

Backend

Python, Django REST Framework

Frontend

Next.js, React, Zustand, Tailwind CSS

Database

PostgreSQL 17, Redis

Infrastructure

AWS (RDS, EC2, S3, CloudFront), Docker

Tools

GitHub, pgBouncer

Why Join Us

• Work on a product processing 140M+ records—real scale, real challenges
• Direct impact on product direction and technical decisions
• Modern tech stack with room to experiment and innovate
• Collaborative team environment with a focus on growth
• Competitive compensation and flexible hybrid work model

Responsibilities:

Work with development teams and product managers to ideate software solutions.

Design client-side and server-side architecture.

Build the front-end of applications through appealing visual design.

Develop and manage well-functioning databases and applications.

Write effective APIs.

Testsoftware to ensure responsiveness and efficiency.

Troubleshoot, debug and upgrade software.

Create security and data protection settings.

Build features and applications with a mobile responsive design.

Write technical documentation.

Current Stack:

Backend: Spring (JAVA), Spring Boot, Laravel (PHP), MySQL, NoSQL, NGINXPlus.

2 Frontend: Angular 5+ Ngrx/store5

Infrastructure: Google cloud platform (App engine, CloudSQL, BigQuery, PubSub, Firebase Hosting), Pusher.io (WebSockets), Filestack, Postmark app,

4 Tools: Postman app, JIRA

Rest APIs, Microservices, Agile, Oauth, Message Queue, Git

You are where our search ends, if you hold:

6 years proven experience as a Full Stack Developer or similar role.

Experience working with service-oriented architectures and web-based solutions.

Familiarity with common stacks.

Knowledge of multiple front-end languages and libraries (e. g. HTML/ CSS, JavaScript, XML, jQuery).

Knowledge of multiple back-end languages (e. g. C#, Java, Python) and JavaScript frameworks (e. g. Angular, React, Node.js ).

Familiarity with databases (e. g. MySQL, MongoDB), web servers (e. g. Apache) and UI/UX design.

Experience working on Agile processes (Scrum, Kanban).

Experience working on the AWS technologies.

Excellent communication and teamwork skills

Great attention to detail.

Organizationalskills.

An analytical mind.

Degree in B. tech/BE.

Note - Candidates Should have scored 60% and above in their graduation.

Java Fullstack Developer – Job Description

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: 5+ years

Location: Bangalore

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 hassuccessfully 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 ofservicesincluding 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.

Experience:

Should have a minimum of 10-12 years of Experience.

Should have experience on Product Development/Maintenance/Production Support experience in a support organization

Should have a good understanding of services business for fortune 1000 from the operations point of view

Ability to read, understand and communicate complex technical information

Ability to express ideas in an organized, articulate and concise manner

Ability to face stressful situation with positive attitude

Any certification in regards to support services will be an added advantage

Education: BE, B- Tech (CS), MCA

Location: India

Primary Skills:

Hands on experience with OpenStack framework. Ability to set up private cloud using OpenStack environment. Awareness to various OpenStack services and modules

Strong experience with OpenStack services like Neutron, Cinder, Keystone, etc.

Proficiency in programming languages such as Python, Ruby, or Go.

Strong knowledge of Linux systems administration and networking.

Familiarity with virtualization technologies like KVM or VMware.

Experience with configuration management and IaC tools like Ansible, Terraform.

Subject matter expertise in OpenStack security

Solid experience with Linux and shell scripting

Sound knowledge of cloud computing concepts & technologies, such as docker, Kubernetes, AWS, GCP, Azure etc.

Ability to configure OpenStack environment for optimum resources

Good knowledge of security, operations in open stack environment

Strong knowledge of Linux internals, networking, storage, security

Strong knowledge of VMware Enterprise products (ESX, vCenter)

Hands on experience with HEAT orchestration

Experience with CI/CD, monitoring, operational aspects

Strong experience working with Rest API's, JSON

Exposure to Big data technologies ( Messaging queues, Hadoop/MPP, NoSQL databases)

Hands on experience with open source monitoring tools like Grafana/Prometheus/Nagios/Ganglia/Zabbix etc.

Strong verbal and written communication skills are mandatory

Excellent analytical and problem solving skills are mandatory

Role & Responsibilities

Advise customers and colleagues on cloud and virtualization topics

Work with the architecture team on cloud design projects using openstack

Collaborate with product, customer success, and presales on customer projects

Participate in onsite assessments and workshops when requested 

Provide subject matter expertise and mentor colleagues

Set up open stack environments for projects

Design, deploy, and maintain OpenStack infrastructure.

Collaborate with cross-functional chapters to integrate OpenStack with other services (k8s, DBaaS)

Develop automation scripts and tools to streamline OpenStack operations.

Troubleshoot and resolve issues related to OpenStack services.

Monitor and optimize the performance and scalability of OpenStack components.

Stay updated with the latest OpenStack releases and contribute to the OpenStack community.

Work closely with Architects and Product Management to understand requirement

should be capable of working independently & responsible for end-to-end implementation

Should work with complete ownership and handle all issues without missing SLA's

Work closely with engineering team and support team

Should be able to debug the issues and report appropriately in the ticketing system

Contribute to improve the efficiency of the assignment by quality improvements & innovative suggestions

Should be able to debug/create scripts for automation

Should be able to configure monitoring utilities & set up alerts

Should be hands on in setting up OS, applications, databases and have passion to learn new technologies

Should be able to scan logs, errors, exception and get to the root cause of the issue

Contribute in developing a knowledge base on collaboration with other team members

Maintain customer loyalty through Integrity and accountability

Groom and mentor team members on project technologies and work

• 2 – 6 years of experience with in Java /J2EE.
• Hands-on experience working on Core JAVA, JSP, Servlets, Spring,Java script, Apache & Tomcat, Web services ,ReactJS and JQuery.
• Having experience on Multi-threading is added advantage.
• Exposure working on Linux environment is preferred.
• The ability to work in a fast, agile and nimble environment with frequent change
• Good communication & presentation skills
• Troubleshooting of issues

About us: 

Zemoso Technologies is a Software Product Market Fit Studio that brings silicon valley style rapid prototyping and rapid application builds to Entrepreneurs and Corporate innovation. We offer Innovation as a service and work on ideas from scratch and take it to the Product Market Fit stage using Design Thinking->Lean Execution->Agile Methodology. 

We were featured as one of Deloitte Fastest 50 growing tech companies from India thrice (2016, 2018 and 2019). We were also featured in Deloitte Technology Fast 500 Asia Pacific both in 2016 and 2018. 

We are located in Hyderabad, India, and Dallas, US. We have recently incorporated another office in Waterloo, Canada. 

Our founders have had past successes - founded a decision management company acquired by SAP AG (now part of Hana Big data stack & NetWeaver BPM), early engineering team of Zoho (leading billion $ SaaS player) & some Private Equity experience. Marquee customers along with some exciting start-ups are part of our clientele. 

What You will do: 

● Create beautiful software experiences for our clients using design thinking, lean and agile methodology. 

● Work on software products designed from scratch using the latest cutting edge technologies, platforms and languages such as JAVA, python, Javascript, GoLang and Scala. 

● Work in a dynamic, collaborative, transparent, non-hierarchical culture.
● Work in collaborative, fast-paced and value-driven teams to build innovative customer experiences for our clients. 

● Help to grow the next generation of developers and have a positive impact on the industry. 

Basic Qualifications: 

● Experience: 4+ years. 

● Hands-on development experience with a broad mix of languages such as JAVA, Python, Javascript etc. 

● Server-side development experience mainly in JAVA, (Python and nodeJS can be considerable) 

● UI development experience in ReactJS or AngularJS or PolymerJS or EmberJS or Jquery etc. are good to have. 

● Passion for software engineering and follow the best coding concepts. ● Good to great problem solving and communication skills.

Nice to have Qualifications:

● Product and customer-centric mindset. 

● Great OO skills, including design patterns. 

● Experience with devops, continuous integration & deployment. ● Exposure to big data technologies, Machine Learning and NLP will be a plus.

Benefits:
 

● Competitive salary. 

● Work from anywhere. 

● Learning and gaining experience rapidly. 

● Reimbursement for basic working set up at home. 

● Insurance (including a top up insurance for COVID). 

Location:

Remote - work from anywhere.

• Core Java  (Collections,  Annotations, Threads, Exceptions)
  Java 8  ( Must)
  Spring Core (Must)
  Spring Boot, Spring Cloud, Micro services (Must)
  Angular / React , Bootstrap ( Good to have)
  Docker / Kubernetes  ( Good to have) Pivotal Cloud Foundry / Tanzu Services ( Good to have)

• Demonstrated experience as a software engineer, with at least 3-5 years’ experience in technology roles
• Experience working on complex systems and cloud architectures, preferably in a B2B or enterprise context
• Experience with the Java programming language and frameworks such as Spring & SpringBoot
• Experience with front-end Javascript frameworks such as ReactJS
• Experience working in databases and SQL queries for high-performance 
• Experience and keen understanding of the value of working in agile teams
• A “quality-first” mindset, with experience working in continuous integration environments
• Highly effective at communicating
• Respect for other team members and a highly collaborative approach to working and learning together

Skills and Experience :

• 2-7 years of experience as a Java/J2EE developer.
• 1-3 years of experience with Angular / React is desirable.
• 2-5 years of experience in using Spring and Spring Boot frameworks.
• Thorough knowledge of server-side development.
• Proven experience as a Full Stack Developer or similar role.
• Good understanding of web services (WSDL SOAP, RESTful).
• Hands-on experience in using Application Servers like WebSphere.
• Expertise in relational databases (Oracle, SQL Server).
• AI/ML domain knowledge is desirable.
• Familiarity with common stacks.
• Knowledge of multiple frontend languages and libraries, like HTML/ CSS, JavaScript, XML, jQuery.
• Experience in implementation of Microservices
• Experience with AWS (S3, SQS, SNS, ECS, EC2, ALB, API Gateway, Lambda, etc.) is highly desirable
• Good understanding of Docker & Kubernetes is highly desired.
• Familiarity with databases (MySQL, MongoDB, PostgresSQL), web servers (Apache), and UI/UX designs.
• Excellent communication and teamwork skills.

About LevaData

LevaData, the Cognitive Sourcing Platform, offers global enterprises the ability to improve gross margins by reducing supply chain costs, with a focus on delivering measurable and accountable supply chain solutions and strategies that transform companies and markets. Customers include leaders in the top global supply chain organizations, as well as medium-sized OEMs seeking to achieve best-in-class direct materials sourcing practices. LevaData is privately held and headquartered in Sunnyvale, Calif. For more information, visit https://www.levadata.com/">www.levadata.com.

Levadata Clientele: IBM, Fitbit, Lenovo, Zebra, Poly, Commscope

LevaData Fundings:

June, 2018: Series B, $12 million.

Aug, 2017: Series A, $5 million.