Java Developer

Java Developer – Job Description Wissen Technology is now hiring for a Java Developer - Bangalore/Mumbai 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. - 3 to 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. 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. 

Key Responsibilities:

• Design, develop, and maintain robust and scalable backend applications using Core Java and Spring Boot.
• Build and manage microservices-based architectures and ensure smooth inter-service communication.
• Integrate and manage real-time data streaming using Apache Kafka.
• Write clean, maintainable, and efficient code following best practices.
• Collaborate with cross-functional teams including QA, DevOps, and product management.
• Participate in code reviews and provide constructive feedback.
• Troubleshoot, debug, and optimize applications for performance and scalability.

Required Skills:

• Strong knowledge of Core Java (Java 8 or above).
• Hands-on experience with Spring Boot and the Spring ecosystem (Spring MVC, Spring Data, Spring Security).
• Experience in designing and developing RESTful APIs.
• Solid understanding of Microservices architecture and related patterns.
• Practical experience with Apache Kafka for real-time data processing.
• Familiarity with SQL/NoSQL databases such as MySQL, PostgreSQL, or MongoDB.
• Good understanding of CI/CD tools and practices.
• Knowledge of containerization tools like Docker is a plus.
• Strong problem-solving skills and attention to detail.

JAVA Developer 

Exp: 8+ Years 

Location: Bengaluru 

Notice period: 0-30 days 

Key Responsibilities: 

Design & Develop Scalable Microservices: 

• Architect, develop, and deploy RESTful APIs & Microservices using SpringBoot. 
• Ensure high availability and fault tolerance using Resilience4J and circuit breakers. 

Database & Caching Optimization: 

• Work with PostgreSQL, MySQL, MongoDB, or Cassandra for optimal data persistence. 
• Implement caching strategies using Redis or Memcached. 

Security & Performance Best Practices: 

• Apply OAuth2, OpenID Connect, or Keycloak for authentication. 
• Secure APIs using JWT, Role-Based Access Control (RBAC), and API Gateways. 
• Use Spring Security and OWASP guidelines to harden the system. 

Event-Driven & Asynchronous Processing: 

• Implement Kafka, RabbitMQ, or ActiveMQ for real-time event-driven achitecture. 
• Use Spring WebFlux for reactive programming in high-throughout applications. 

Testing & Code Quality: 

• Write unit tests using JUnit, Mockito, and TestContainers. 
• Perform contract testing with Pact or Spring Cloud Contract. 
• Ensure code quality using SonarQube, PMD, and Checkstyle. 

Observability & Logging: 

• Use ELK Stack (Elasticsearch, Logstash, Kibana) or Grafana & Prometheus for monitoring. 
• o Implement distributed tracing using Jaeger or Zipkin. 

Collaboration & Agile Development: 

• Follow Agile and Scrum methodologies with JIRA, Confluence, or Trello. 
• Work closely with frontend, DevOps, and product teams. 

Required Skills & Technologies: 

• Languages: Java, Kotlin (Good to Have) 

• Frameworks: Spring Boot, Spring Cloud, Spring WebFlux 

• Microservices & API Development: REST, GraphQL, gRPC 

• Cloud Platforms: AWS, Azure, GCP or any 

• CI/CD & DevOps: Docker, Kubernetes (K8s), Helm, terraform (nice to have) 

• Databases: PostgreSQL, MySQL, MongoDB, Redis 

• Messaging Systems: Kafka, RabbitMQ, ActiveMQ 

• Security & Authentication: OAuth2, OpenID Connect, JWT, Keycloak 

• Testing Frameworks: JUnit, Mockito, TestContainers, Pact 

• Logging & Monitoring: ELK Stack, Prometheus, Grafana, Jaeger 

• Version Control: Git, GitHub, GitLab 

• Agile Methodologies: Scrum, Kanban 

• Designing, implementing and maintaining Java-based applications

• Contributing in all phases of the development lifecycle

• Writing testable, scalable and efficient code

• Test and debug new applications and updates

• Maintain up to date code documentation

• Participating in code reviews
  Should have worked on Springboot and Hibernate

About Us

At Toddle, we are on a mission to help schools around the world deliver better learning. We are a team of 2x founders – before founding Toddle, we set up a network of preschools and schools in India. We continue to operate these preschools and schools as it gives us a unique vantage

point into the challenges faced by schools.

Our belief is that real impact in education can only be achieved by improving schools. That’s because children spend more than 80% of their learning time in school and schools are here to stay as schools are not just about teaching & learning, they also play a pivotal social role in our lives. So while most Edtech companies are trying to solve for education by working outside the school system, we think that the focus needs to be on taking our schools to the next level.

Our first product is a collaboration platform for teaching teams – we say that Toddle is to teaching, what Figma is to design. In its current version, Toddle empowers teachers to work together and better across all stages of the teaching-learning process – right from curriculum

planning and assessments to progress-tracking and family communication.

Here are some key facts about us:

1. Currently used by 1,000+ schools and 30,000+ teachers from 107 countries

2. Global revenue – 40% from Americas, 30% from EMEA, 30% from APAC

3. NRR > 115%

4. NPS > 70

5. Annual churn < 5%

6. Inbound led GTM motion fuelled by positive word of mouth

We love solving for

1. Creating delightful experiences that help teaching teams collaborate better & be more effective

2. Building tools that help teachers personalise learning for their students

3. Helping teachers around the world connect with each other meaningfully

We are at a series A stage right now, growing fast in the SAAS Ed-tech space, and have been funded by Sequoia, Matrix, Beenext, and Better Capital among others.

Here’s what you’ll be doing

We are looking for a passionate and skilled Backend engineer, one who partners with us in creating beautiful products for teachers, students and parents alike. As a Backend engineer, you will play a major role in designing, developing and deploying high-quality web platforms. In

this multifaceted role, you will get the opportunity to work along curriculum experts, teachers, and students, and user-test the product in real school settings.

Required Skills:

Frameworks & Technologies: Node.js, Express, GraphQL, JWT

Database: SQL query writing and optimisation.

Tools: Git basics, Scripting basics

Good to have:

DevOps experience with AWS, CI/CD

Working experience in PostgreSQL

Is this someone that looks like you?

• Education: B.E/B.Tech degree

• Experience: 1 to 3 years of relevant working experience (SaaS preferred)

• Soft Skills: Having a bias towards action, a good sense of design, empathy, and good communication skills

• We deeply value building the right culture at Toddle, and these are a few things that we look for in each hire - Coach-ability, Curiosity, Ownership, Hustle and Humility

Excited about the role?

Here are a few more benefits:

1. Work from anywhere - Work from where you like - home, co-working space, cafe or the hills

2. Exposure to diverse learning opportunities

Work across different projects & teams to develop skills outside of your core expertise

Access to a small budget towards learning (e.g. books, online courses, substacks)

3. Uncapped leave policy

We trust you fully on your commitment to our mission and your judgement on planning your time and taking leaves:

No cap on the number of sick or casual leaves

Special paid leaves for childbirth, wedding etc.

And if in any circumstance you feel burnt out - there is a little something for this too!

No questions asked menstrual leave

4. Flexible working hours - Block “no-meeting hours” to enable uninterrupted focused work

5. No bell curve performance evaluations

6. And yes, a super fun and smart group of folks to collaborate and grow with.

Still with us? Here’s the process:

1. Shortlisting:

• Apply for the role.

• We’ll check out your application and assess it for a fit

• You will hear back from us within 2-3 days of the submission if shortlisted

2. Once shortlisted, we usually do about 2-3 rounds of interviews, a written assignment, and deep reference checks.

3. We value everyone’s time hence we make it a point to communicate proactively at all stages of your application. You can always reach out to us for any questions.

• Have the passion and experience for building responsive, elegant and engaging experiences with future friendly web technologies.
• Integration of user-facing elements developed by front-end developers with server side logic.
• Writing reusable, testable, and efficient code with proper documentation. Design and implementation of low-latency, high-availability, and performant applications Implementation of security and data protection Integration of data storage solutions.
• Continually keep yourself and your design team updated with the latest changes in your industry’s standards