

About Fission Labs
About
Fission Labs is a Software Product Development & Services company delivering high-end solutions primarily in the areas of highly scalable cloud applications and analytics for large sets of data. Few of the challenges we are working on are scaling an application to support 150 million users, real-time bidding with response time requirements of 100 ms or less. If you are somebody who wants to work on big challenges and change the world, we have those opportunities in spades
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Job Title : Full Stack Engineer (Python + React.js/Next.js)
Experience : 1 to 6+ Years
Location : Bengaluru (Indiranagar)
Employment : Full-Time
Working Days : 5 Days WFO
Notice Period : Immediate to 30 Days
Role Overview :
We are seeking Full Stack Engineers to build scalable, high-performance fintech products.
You will work on both frontend (Typescript/Next.js) and backend (Python/FastAPI/Django), owning features end-to-end and contributing to architecture, performance, and product innovation.
Main Tech Stack :
Frontend : Typescript, Next.js, React
Backend : Python, FastAPI, Django
Database : PostgreSQL, MongoDB, Redis
Cloud : AWS/GCP, Docker, Kubernetes
Tools : Git, GitHub, CI/CD, Elasticsearch
Key Responsibilities :
- Develop full-stack applications with clean, scalable code.
- Build fast, responsive UIs using Typescript, Next.js, React.
- Develop backend APIs using Python, FastAPI, Django.
- Collaborate with product/design to implement solutions.
- Own development lifecycle: design → build → deploy → monitor.
- Ensure performance, reliability, and security.
Requirements :
Must-Have :
- 1–6+ years of full-stack experience.
- Product-based company background.
- Strong DSA + problem-solving skills.
- Proficiency in either frontend or backend with familiarity in both.
- Hands-on experience with APIs, microservices, Git, CI/CD, cloud.
- Strong communication & ownership mindset.
Good-to-Have :
- Experience with containers, system design, observability tools.
Interview Process :
- Coding Round : DSA + problem solving
- System Design : LLD + HLD, scalability, microservices
- CTO Round : Technical deep dive + cultural fit
Objective of the Role:
We are looking for a Senior Software Engineer with expertise in Java to take a lead role in developing and delivering innovative solutions. This role demands a proactive approach to ownership, driving initiatives from concept to deployment, and ensuring high-quality outcomes that align with both technical and product goals.
You Will:
- Design, implement, and maintain Java-based applications with a focus on high-volume, low- latency.
- Work on managing Java APIs/microservices development teams.
- Develop and release cycle modern Java-based web applications.
- Create Spring Boot-based microservices templates for product engineering teams.
- Develop full-stack solutions using Java, Spring, and databases like Postgres and MySǪL.
You must have:
- Bachelor's degree in Computer Science or related field.
- 6 to 8 years of experience in Java development, and at least 2-3 years of experience in Telecom domain.
- Experience in designing the HLD and LLD.
- Proficiency in core Java, JPA, PostgreSǪL, Spring Boot, and microservices.
- Experience using AI assistants for developing Java features such as REST APIs and exception handling, with demonstrated ability to make production-ready modifications and validate solutions through unit and integration testing.
- Strong understanding of Java frameworks like Spring and Hibernate.
- Hands-on experience with RESTful web services and API gateway.
- Knowledge of design patterns, data structures, and algorithms.
- Excellent problem-solving skills and analytical reasoning.
Job Description
Team Lead – Full Stack Developer
Experience
3–5 Years
Location
Bangalore (Onsite)
Role Summary
We are looking for a highly skilled, hands-on, and ownership-driven Team Lead – Full Stack Developer who can independently architect, design, develop, deploy, and support enterprise-grade web, mobile, and cloud-native applications.
The ideal candidate should have strong expertise in ReactJS, Next.js, Java, Spring Boot, Microservices, Distributed Systems, Cloud Technologies, DevOps, AI-Assisted Development, and Product Engineering.
The candidate will be responsible for owning end-to-end product development, including frontend architecture, backend services, APIs, databases, deployment, production support, stakeholder communication, sprint planning, team leadership, and successful delivery of scalable, secure, and high-performance solutions.
Key Responsibilities
Architecture & Product Ownership
- Design end-to-end application architecture, HLDs, LLDs, deployment architecture, integration architecture, and security architecture.
- Build products from scratch and independently drive projects from concept to production.
- Convert business requirements into technical solutions, user stories, sprint plans, and delivery roadmaps.
- Design scalable, secure, fault-tolerant, multi-tenant, and enterprise-grade applications.
- Evaluate and recommend suitable technologies, frameworks, and development approaches.
Full Stack Development
Frontend Development
- Design and develop responsive and modern web applications.
- Build reusable UI components and scalable frontend architectures.
- Develop Single Page Applications (SPA) using ReactJS and Next.js.
- Implement state management using Redux Toolkit and Context API.
- Integrate REST APIs, GraphQL APIs, and WebSocket-based applications.
- Ensure application accessibility, responsiveness, performance optimization, and SEO best practices.
- Collaborate closely with UI/UX designers to deliver intuitive user experiences.
Backend Development
- Develop enterprise-grade backend applications using Java and Spring Boot.
- Design and develop REST APIs, Microservices, SOAP Services, gRPC Services, and Webhooks.
- Build reusable frameworks, service layers, and integration modules.
- Implement authentication, authorization, API security, and enterprise integrations.
- Optimize application performance, scalability, reliability, and maintainability.
Distributed Systems & Enterprise Solutions
- Design distributed systems using Event-Driven Architecture, CQRS, Saga Pattern, DDD, Hexagonal Architecture, and Clean Architecture.
- Implement resilience patterns, service discovery, circuit breakers, distributed transactions, and failover mechanisms.
- Build workflow automation platforms, document management systems, enterprise integration solutions, and business process automation systems.
Team Leadership & Delivery
- Lead and mentor development teams.
- Conduct code reviews, architecture reviews, and technical discussions.
- Drive sprint planning, stand-ups, reviews, and retrospectives.
- Collaborate with Product, Business, QA, DevOps, AI, and Management teams.
- Ensure successful project delivery while maintaining engineering standards and best practices.
- Support hiring, onboarding, mentoring, and technical growth of team members.
DevOps, Deployment & Production Support
- Manage CI/CD pipelines and deployment processes.
- Work with Docker, Kubernetes, and cloud-native environments.
- Implement Blue-Green, Canary, Rolling, and Zero-Downtime deployment strategies.
- Monitor application health and troubleshoot production issues.
- Ensure application reliability, security, scalability, and operational excellence.
AI & Innovation
- Leverage AI tools to improve development productivity and software quality.
- Build AI-powered Proof of Concepts (POCs) and enterprise applications.
- Utilize AI for development, testing, documentation, architecture reviews, and automation.
- Collaborate with AI teams to integrate intelligent capabilities into business applications.
Mandatory Technical Skills
Frontend Technologies
- ReactJS
- Next.js
- JavaScript (ES6+)
- TypeScript
- HTML5
- CSS3
- Tailwind CSS
- Material UI
- Bootstrap
- Redux Toolkit
- Context API
- React Query
- Responsive Design
- Progressive Web Applications (PWA)
Backend Technologies
- Java 8/11/17/21
- Core Java
- Spring Boot
- Spring MVC
- Spring Security
- Spring Data JPA
- Spring Cloud
- Spring Batch
- Spring WebFlux
- Spring Integration
- Spring AOP
- Spring Validation
APIs & Enterprise Integrations
- REST APIs
- SOAP Services
- GraphQL
- gRPC
- Webhooks
- OpenAPI / Swagger
- OAuth2
- JWT
- OpenID Connect
- SAML
Microservices & Distributed Systems
- Microservices
- Event-Driven Architecture
- CQRS
- Saga Pattern
- Domain-Driven Design (DDD)
- Event Sourcing
- Hexagonal Architecture
- Clean Architecture
- Service Discovery
- Circuit Breakers
Messaging & Streaming
- Apache Kafka
- RabbitMQ
- Event Streaming
- Message Brokers
- Asynchronous Processing
Databases
- PostgreSQL
- Oracle Database
- Oracle FLEXCUBE
- MySQL
- SQL Server
- MongoDB
- Redis
- Database Design
- Query Optimization
- Indexing
- Migration
- Replication
DevOps & Cloud
- Docker
- Kubernetes
- Jenkins
- GitHub Actions
- GitLab CI/CD
- AWS
- Azure
- GCP
Monitoring & Quality
- Grafana
- Prometheus
- ELK Stack
- OpenTelemetry
- JUnit
- Mockito
- SonarQube
- Unit Testing
- Integration Testing
- API Testing
- Performance Testing
- Security Testing
AI-Assisted Development Tools
- ChatGPT
- Claude
- Cursor
- GitHub Copilot
- Replit
- Lovable
- IntelliJ IDEA
- Prompt Engineering
- AI-Based Code Review
- AI-Based Testing & Documentation
Preferred Domain Experience
- Banking & Financial Services
- FinTech
- Enterprise SaaS
- Workflow Automation
- Digital Transformation
- AI-Powered Applications
- OCR & Document Processing
- Payment Systems
- Enterprise Integration Platforms
- Identity & Access Management
- Multi-Tenant Platforms
Soft Skills
- Strong leadership and ownership mindset.
- Excellent communication and stakeholder management skills.
- Strong analytical and problem-solving abilities.
- Ability to manage multiple projects simultaneously.
- Strong mentoring and team collaboration skills.
- Innovation-driven and continuous learning attitude.
Education
Bachelor's Degree or Master's Degree in:
- Computer Science
- Information Technology
- Software Engineering
- Electronics & Communication
- Or equivalent practical experience
Preferred Candidate Profile
A highly motivated Full Stack Engineering Leader with experience building products from scratch, owning frontend and backend architecture, leading engineering teams, driving innovation, and delivering scalable enterprise-grade applications across web, mobile, cloud, and enterprise platforms. The candidate should be capable of independently managing architecture, development, deployment, production support, and successful project delivery while mentoring and growing engineering teams.
mandatory one w
Fullstack Developer:
We are looking for an onsite Fullstack Developer experienced with Fullstack technologies, Cloud and IoT solutions. For the agile development of our web, mobile, and cloud applications and IoT products, building efficient, reliable and scalable solutions. A hands-on coding role, where you will build and manage your own team.
Tasks:
· Development of modern based applications in the back-end
· Development, implementation and optimisation of innovative IoT products, web apps and new features
· Technical product design, solution architecture, specifications and implementation of Livello solutions
· Work with a cross-functional team to define, build, test, and deploy universal applications
· Version control with Git is part of your daily work and continuous integration
· Ensure the implementation of technical standards, quality assurance and best practices.
Requirements:
· Bachelor's degree in Computer Science or comparable field of study
· 2-4 years’ experience in agile software development
· Proficiency in Node.js, React js, Mongo DB, Docker along with any cloud Exp (AWS, GCP, Azure)
· Experience with test and deployment automation (Gitlab, Fastlane, Jest).
· Good to have Experience with GraphQL and Kubernetes as well as state management solutions (Redux, Saga)
· Ability to work cooperatively and independently, analytical thinking, willingness to lead and take on responsibility
· Fluent in English.
Nice to have:
· Experienced in IoT-to-Cloud managed services, Microservices.
· Knowledge of IoT device management and message brokers like AMQP or MQTT
Benefits
Ø A responsible position in a fast-growing and highly innovative start-up
Ø An agile and diverse team with colleagues from all over the world, working with our main office in Germany
Ø English speaking open work environment, with flat hierarchies and short decision-making paths
Ø Creative freedom for own ideas, projects and personal development.
Job Description:
Software Development Engineer - Backend
Responsibilities
• Writing reusable, testable, and efficient code Develop, Code or modify, test, and
debug application programs of varying degree of complexity.
• Design and implementation of low-latency, high-availability, and performant
applications.
• Integration of user-facing elements developed by front-end developers with server
side logic Implementation of security and data protection.
• Integration of data storage solutions
Skills And Qualifications:
• Experience in design and implementation of low-latency, high availability, high
performance applications capable of handling large scale distributed workloads
Expert in Java, with knowledge of Spring boot and Hibernate framework.
• Experience with Elasticsearch
• Knowledge of user authentication and authorisation between multiple systems,
servers, and environments.
• Experience with relational databases like PostgreSQL/MySQL/Oracle.
• Able to create database schemas that represent and support business processes
Strong unit test and debugging skills
• Proficient understanding of code versioning tools such as Git.
• Understand lean approach with frequent releases and focussed on getting MVPs into
market as early as possible to increase feedback
• Passion for fast-paced and iterative software development
• Fast learner and open to working with new libraries/platforms
Nice to have:
• Experience developing in AWS/Azure/Google Cloud environments
• Solid understanding of Cloud PaaS / IaaS constructs and their APIs Understanding of
security products and secure coding techniques
We are looking for a Node.js Developer responsible for managing the interchange of data between the server and the users. Your primary focus will be the development of all server-side logic, definition, and maintenance of the central database, and ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well.
- 2+ years of experience with Node.js/Express.js or similar framework
- 1+ years of experience with MongoDB
- 1+ years of experience creating REST APIs and backend systems
- Experience with Docker is a plus
- Integration of user-facing elements developed by front-end developers with server-side logic
- Writing reusable, testable, and efficient code
- Design and implementation of low-latency, high-availability, and performant applications
- Implementation of security and data protection
- Server Setup/AWS/GCP experience is a plus
- Creating APIs and backend systems
- Scraping sites and creating backend dashboards for data management
- Backend infrastructure management and deployment
Responsibilities:
- Developing and maintaining all server-side network components.
- Ensuring optimal performance of the central database and responsiveness to front-end requests.
- Collaborating with front-end developers on the integration of elements.
- Designing customer-facing UI and back-end services for various business processes.
- Developing high-performance applications by writing testable, reusable, and efficient code.
- Implementing effective security protocols, data protection measures, and storage solutions.
- Running diagnostic tests, repairing defects, and providing technical support.
- Documenting Node.js processes, including database schemas, as well as preparing reports.
- Recommending and implementing improvements to processes and technologies.
- Keeping informed of advancements in the field of Node.js development.
Requirements:
- Bachelor's degree in computer science, information science, or similar.
- At least two years of experience as a Node.js developer.
- Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
- Superb interpersonal, communication, and collaboration skills.
- Exceptional analytical and problem-solving aptitude.
- Great organizational and time management skills.
- Availability to resolve urgent web application issues outside of business hours.
Fullstack Developer/Architect/Programmer:
- 8-10 years experience as Developer/Programmer.
- Should have an expertise in Core Java, Java & J2ee
- Built MVC based Web Application Using JSP/Struts framework
- Experience in Webservices-Restful
- Experience in Application Servers like Tomcat and WebLogic
- Good Knowledge of implementing JMS messaging services
- Good knowledge of HTML5,CSS and JavaScript – Angular.js,Bootstrap, React.js
- Should have skills in Spring 3.x, Hibernate, Weblogic 12c Implementation
Java Developer
Responsibilities
• Design and development of RESTful Web Services
• Hands on database experience (Oracle / PostgreSQL / MySQL / SQLServer)
• Hands on experience with developing web applications leveraging Spring Framework
• Hands on experience with developing microservices leveraging Spring Boot
• Knowledge in Application Server Tomcat
• Continuous Integration tools (Jenkins)
• Ability to communicate effectively in English, with good verbal and written skills
• Strong believer and follower of SDLC principles with an emphasis on Quality & Standards based
• development
What we need
• 3-4 years of experience in Java/J2EE technologies
• Core Java
• Spring Framework
• Spring DI, Spring AOP, Autowiring
• Spring Boot
• Spring ORM / Spring Data JPA
• Willing to learn technology/domain on demand basis
• Good team interactions.
2. Can do tech design and understand complex architecture
3. Follow best coding practices












