

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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About the role:
The SDE 2 - Backend will work as part of the Digitization and Automation team to help Sun King design, develop, and implement - intelligent, tech-enabled solutions to help solve a large variety of our business problems. We are looking for candidates with an affinity for technology and automations, curiosity towards advancement in products, and strong coding skills for our in-house software development team.
What you will be expected to do:
- Design and build applications/systems based on wireframes and product requirements documents
- Design and develop conceptual and physical data models to meet application requirements.
- Identify and correct bottlenecks/bugs according to operational requirements
- Focus on scalability, performance, service robustness, and cost trade-offs.
- Create prototypes and proof-of-concepts for iterative development.
- Take complete ownership of projects (end to end) and their development cycle
- Mentoring and guiding team members
- Unit test code for robustness, including edge cases, usability and general reliability
- Integrate existing tools and business systems (in-house tools or business tools like Ticketing softwares, communication tools) with external services
- Coordinate with the Product Manager, development team & business analysts
You might be a strong candidate if you have/are:
- Development experience: 3 – 5 years
- Should be very strong in problem-solving, data structures, and algorithms.
- Deep knowledge of OOPS concepts and programming skills in Core Java and Spring Boot Framework
- Strong Experience in SQL
- Experience in web service development and integration (SOAP, REST, JSON, XML)
- Understanding of code versioning tools (e.g., git)
- Experience in Agile/Scrum development process and tools
- Experience in Microservice architecture
- Hands-on experience in AWS RDS, EC2, S3 and deployments
Good to have:
- Knowledge on messaging systems RabbitMQ, Kafka.
- Knowledge of Python
- Container-based application deployment (Docker or equivalent)
- Willing to learn new technologies and implement them in products
What Sun King offers:
- Professional growth in a dynamic, rapidly expanding, high-social-impact industry
- An open-minded, collaborative culture made up of enthusiastic colleagues who are driven by the challenge of innovation towards profound impact on people and the planet.
- A truly multicultural experience: you will have the chance to work with and learn from people from different geographies, nationalities, and backgrounds.
- Structured, tailored learning and development programs that help you become a better leader, manager, and professional through the Sun King Center for Leadership.
About Sun King
Sun King is a leading off-grid solar energy company providing affordable, reliable electricity to 1.8 billion people without grid access. Operating across Africa and Asia, Sun King has connected over 20 million homes, adding 200,000 homes monthly.
Through a ‘pay-as-you-go’ model, customers make small daily payments (as low as $0.11) via mobile money or cash, eventually owning their solar equipment and saving on costly kerosene or diesel. To date, Sun King products have saved customers over $4 billion.
With 28,000 field agents and embedded electronics that regulate usage based on payments, Sun King ensures seamless energy access. Its products range from home lighting and phone charging systems to solar inverters capable of powering high-energy appliances.
Sun King is expanding into clean cooking, electric mobility, and entertainment while serving a wide range of income segments.
The company employs 2,800 staff across 12 countries, with women representing 44% of the workforce, and expertise spanning product design, data science, logistics, sales, software, and operations.
Location: Hybrid/ Remote
Openings: 2
Experience: 5+ Years
Qualification: Bachelor’s or Master’s in Computer Science or related field
Job Responsibilities
Problem Solving & Optimization:
- Analyze and resolve complex technical and application issues.
- Optimize application performance, scalability, and reliability.
Design & Develop:
- Build, test, and deploy scalable full-stack applications with high performance and security.
- Develop clean, reusable, and maintainable code for both frontend and backend.
AI Integration (Preferred):
- Collaborate with the team to integrate AI/ML models into applications where applicable.
- Explore Generative AI, NLP, or machine learning solutions that enhance product capabilities.
Technical Leadership & Mentorship:
- Provide guidance, mentorship, and code reviews for junior developers.
- Foster a culture of technical excellence and knowledge sharing.
Agile & Delivery Management:
- Participate in Agile ceremonies (sprint planning, stand-ups, retrospectives).
- Define and scope backlog items, track progress, and ensure timely delivery.
Collaboration:
- Work closely with cross-functional teams (product managers, designers, QA) to deliver high-quality solutions.
- Coordinate with geographically distributed teams.
Quality Assurance & Security:
- Conduct peer reviews of designs and code to ensure best practices.
- Implement security measures and ensure compliance with industry standards.
Innovation & Continuous Improvement:
- Identify areas for improvement in the software development lifecycle.
- Stay updated with the latest tech trends, especially in AI and cloud technologies, and recommend new tools or frameworks.
Required Skills
- Strong proficiency in JavaScript, HTML5, CSS3
- Hands-on expertise with frontend frameworks like React, Angular, or Vue.js
- Backend development experience with Java, Spring Boot (Node.js is a plus)
- Knowledge of REST APIs, microservices, and scalable architectures
- Familiarity with cloud platforms (AWS, Azure, or GCP)
- Experience with Agile/Scrum methodologies and JIRA for project tracking
- Proficiency in Git and version control best practices
- Strong debugging, performance optimization, and problem-solving skills
- Ability to analyze customer requirements and translate them into technical specifications
Founding Engineer - LITMAS
About LITMAS
LITMAS is revolutionizing litigation with the first AI-powered platform built specifically for elite litigators. We're transforming how attorneys research, strategize, draft, and win cases by combining comprehensive case repositories with cutting-edge AI validation and workflow automation. We are a team incubated by experienced litigators, building the future of legal technology.
The Opportunity
We're seeking a Founding Engineer to join our core team and shape the technical foundation of LITMAS. This is a rare opportunity to build a category-defining product from the ground up, working directly with the founders to create technology that will transform the US litigation market.
As a founding engineer, you'll have significant ownership over our technical architecture, product decisions, and company culture. Your code will directly impact how thousands of attorneys practice law.
What You'll Do
- Architect and build core platform features using Python, Node.js, Next.js, React, and MongoDB
- Design and implement production-grade LLM systems with advanced tool usage, RAG pipelines, and agent architectures
- Build AI workflows that combine multiple tools for legal research, validation, and document analysis
- Create scalable RAG infrastructure to handle thousands of legal documents with high accuracy
- Implement AI tool chains to provide agents tool inputs
- Design intuitive interfaces that make complex legal workflows simple and powerful
- Own end-to-end features from conception through deployment and iteration
- Establish engineering best practices for AI systems including evaluation, monitoring, and safety
- Collaborate directly with founders on product strategy and technical roadmap
The Ideal Candidate
You're not just an AI engineer, you're someone who understands how to build reliable, production-grade AI systems that users can trust. You've wrestled with RAG accuracy, tool reliability, and LLM hallucinations in production. You know the difference between a demo and a system that handles real-world complexity. You're excited about applying AI to transform how legal professional’s work.
What We're Looking For
Must-Haves
- Deployed production-grade LLM applications with demonstrable experience in:
- Tool usage and function calling
- RAG (Retrieval-Augmented Generation) implementation at scale
- Agent architectures and multi-step reasoning
- Prompt engineering and optimization
- Knowledge of multiple LLM providers (OpenAI, Anthropic, Cohere, open-source models)
- Background in building AI evaluation and monitoring systems
- Experience with document processing and OCR technologies
- 3+ years of production experience with Node.js, Python, Next.js, and React
- Strong MongoDB expertise including schema design and optimization
- Experience with vector databases (Pinecone, Weaviate, Qdrant, or similar)
- Full-stack mindset with ability to own features from database to UI
- Track record of shipping complex web applications at scale
- Deep understanding of LLM limitations, hallucination prevention, and validation techniques
Tech Stack
- Backend: Node.js, Express, MongoDB
- Frontend: Next.js, React, TypeScript, Modern CSS
- AI/ML: LangChain/LlamaIndex, OpenAI/Anthropic APIs, vector databases, custom AI tools
- Additional: Document processing, search infrastructure, real-time collaboration
What We Offer
- Significant equity stake true ownership in the company you're building
- Competitive compensation commensurate with experience
- Direct impact your decisions shape the product and company
- Learning opportunity work with cutting-edge AI and legal technology
- Flexible work remote-first with a global team
- AI resources access to latest models and compute resources
Interview Process
One more thing: Our process includes deep technical interviews and fit conversations. As part of the evaluation, there will be an extensive take-home test that should expect to take at least 4-5 hours depending on your skill level. This allows us to see how you approach real problems similar to what you'll encounter at LITMAS.
- 5-7 years hands-on working experience in Java / Spring / Spring Cloud / Spring Data JPA / Spring Boot Microservices
- Data processing capability
- Hands-on working experience with GCP/AWS/Azure
- Hands-on working experience with Junit, Git, Jenkins, Maven
- Excellent communication skill
- Experience on Google cloud data flow would be an added advantage
Java, SpringBoot, Problem Solving skill, Apache Beam, AWS/GCP,
Our client is a rapid growth stage Edtech start-up focused on solving the teacher shortage crisis in the US education system using technology by bringing teachers to the classrooms and giving them access to the right tools to teach students in a highly engaging manner.
They have a development center in Mumbai and they are looking to scale up the teams in Pune and Bangalore as well.
What does the role entail:
● Design, develop, and maintain software applications using .NET Core ,C#
● Write clean, maintainable, and efficient code
● Collaborate with cross-functional teams to analyze requirements, design solutions, and implement new features
● Develop and implement unit tests and integration tests to ensure software quality
● Participate in code reviews and provide constructive feedback to peers
● Lead requirements/tasks and guide/mentor junior software engineers in the development process and help them grow their technical skills
Required Skills:
● B.E/B.Tech in computer science
● 4 - 7 years of experience
● Hands-on experience following skills
MS Technologies: NET CORE 5+, C#
Backend : MSSQL/MySQL/Postgres
● Good understanding of Cloud technologies like Azure/AWS.
● Strong understanding of Design Principles, Design patterns and Microservices Architecture.
● Excellent problem-solving, critical thinking, and communication skills
● Must understand full stack development frameworks including knowledge of building scalable APIs, interfaces, software components, schema design, availability, and latency preferably in a cloud environment.
● Worked in fast-paced environment product startup/startup-like culture in an Agile software development environment

Job Summary :
As a Software Development Engineer, you will be responsible for end-to-end delivery of software components all the way to production. In this position you will partner with our globally distributed cross-functional teams, product managers and other internal stakeholders. This position requires understanding business & technical requirements, designing clean solutions, implementing them and managing these systems. A key aspect of the role is to understand the digital commerce businesses part of KBX and implement technology systems that favourably align with business initiatives and requirements. The position will be evaluated in terms of the quality of the technology development, ongoing management of the systems and impact on business metrics.
Responsibilities :
- Work closely with cross functional teams to and deliver quality technology solutions
- Operational rigor for a rapidly growing tech stack and live portals
- Regular communication with management on status and risks.
- Measure success metrics and influence evolution of the tech product
- Be resourceful and find creative solutions to complex technical challenges.
Basic Qualifications :
- Ability to understand business requirements and build technology solutions that factor in the business requirements completely
- Possess an extremely sound understanding of basic areas of Computer Science such as Algorithms, Data Structures, Object Oriented, Databases.
- Excellent coding skills
- Great problem solving skills and propensity to learn and develop tech talent.
- Bachelor’s degree or higher in Computer Science and years of Software Development experience
Preferred Qualifications :
- Understanding on Web programming is must; full stack experience would be a plus.
- Understanding on AWS Cloud Stack (EC2, Lambda, Dynamo DB, Aurora) would be a plus
- Knowledge of serverless development
- Excellent verbal and written communication skills.

Key Activities & Responsibilities:
- 2 - 3 years of hands on experience in development using Java
- In-depth of understanding of development process - Design, Development &Deployment
- Good understanding of Java JavaScript, HTML, CSS, JSON
- Experience in developing APIs and strong knowledge of API development framework like Spring Boot, Spring MVC
- Exposure to collaboration platform like Postman
- Good understanding of Databases like MySQL, MongoDB
- Knowledge of Web Service - SOAP, RESTful
Skill Requirements:
- Good understanding of one of the frameworks - Angular / Node.js / jQuery /JavaScript
- Familiaritywith UI / UX Design
- Experiencein using development platforms like Eclipse / Visual Studio
- Strong programming skills in Javascript/TypeScript, Python or Go.
- Hands-on experience in API development and frameworks such Express, Loopback, Hapi.
- Good Understanding of SQL and NoSQL database.
- Experience in test driven development. (writing unit test and API test).
- Understanding of basic cloud computing concepts and experience in using any of the major cloud service providers(AWS/GCP/Azure).
- Ability to build and deploy the application in a containerized environment.
- Understanding of application logging and monitoring systems like Prometheus or Kibana.
Qualification:
- B.E/B.Tech/M.E./M.Tech/M.S. from a reputed university with a good academic record.
- Curiosity to explore the cutting edge technologies and bake them in the products.
- Zeal and drive to take end to end ownership.
You will be responsible for designing, developing, testing, and debugging responsive mobile and web applications.
Qualifications Required -
· Bachelor's degree or equivalent in Computers
· Experience - 3-4 Years
· Some experience with Mobile App development will be plus
Skillsets:
- Experience in with Node.js, Express.js, REST API
- Experience with NoSQL database - MongoDB
- Experience with AWS services









