Principal Software Engineer

Job Summary

We're looking for a Senior Backend Software Development Engineer (SDE 2 and SDE 3) with deep technical expertise in building and operating production systems at scale. You'll own entire components/services within microservices and data pipelines that handle ~200K queries per second and process petabytes of data daily. This role demands hands-on coding excellence, strong Low-Level Design (LLD) skills, and complete ownership—from component architecture through infrastructure management to cost optimization. You'll architect solutions, lead technical decisions, and drive operational excellence while shipping code daily.

Key Responsibilities:

• Component Ownership: Own one or more critical components/services end-to-end—responsible for architecture, development, deployment, operations, and evolution
• Technical Ownership: Own the entire lifecycle of your components—design, implementation, testing, deployment, monitoring, incident response, and continuous improvement
• Low-Level Design: Create detailed technical designs (LLD) for complex systems—defining data models, APIs, concurrency patterns, and failure modes
• Hands-on Development: Write production-grade code daily—this is not a purely architectural role; you'll be deep in the codebase
• Infrastructure Ownership: Own and operate the infrastructure your components run on—capacity planning, scaling, reliability improvements
• Cost Management: Drive cost optimization for owned components—analyze spending, identify waste, implement efficient architectures
• Scale & Performance: Build and optimize systems handling 200K+ QPS and petabyte-scale data processing
• Observability: Design and implement comprehensive monitoring, alerting, and debugging capabilities for owned components
• Incident Leadership: Lead incident response for your components and related services, conduct post-mortems, drive systemic improvements
• On-Call Excellence: Participate in on-call rotations and ensure your components are operationally sound (runbooks, alerts, dashboards)
• Technical Roadmap: Define and drive the technical roadmap for your owned components—balancing feature development, tech debt, and operational improvements
• Technical Mentorship: Guide junior and mid-level engineers on system design, code quality, and production best practices
• Cross-functional Collaboration: Work with product, infra, and other eng teams to define requirements and deliver solutions
• Agile Execution: Break down complex projects, deliver incrementally in daily cadence, iterate based on feedback

Required Qualifications:

• Experience: 2+ years building and operating backend systems in production environments at scale
• Education: B.E./B.Tech in Computer Science or equivalent practical experience
• Component Ownership: Proven track record of owning significant components or services from inception to maturity—demonstrable end-to-end ownership
• Low-Level Design (LLD): Proven ability to create detailed technical designs—data structures, algorithms, API contracts, concurrency models, failure handling
• Programming Mastery: Expert-level proficiency in at least one modern language (Go, Python, Java, NodeJS etc.) with track record of writing maintainable, performant production code
• Databases: Deep hands-on experience with SQL and NoSQL databases—schema design, query optimization, indexing strategies, operational troubleshooting
• Microservices at Scale: Extensive experience building, deploying, and operating microservices handling high throughput and large data volumes
• Data Pipelines: Strong background designing and running data processing pipelines at scale (batch and/or streaming)
• Observability: Expert understanding of metrics, logging, tracing, and alerting—you know how to make systems debuggable
• Production Operations: Significant experience with incident response, on-call rotations, debugging live issues under pressure
• Infrastructure Knowledge: Hands-on experience managing infrastructure, understanding resource utilization, capacity planning
• Cost Consciousness: Experience analyzing and optimizing infrastructure costs at scale
• Distributed Systems: Strong fundamentals in distributed systems, concurrency, consistency models, and failure scenarios
• Accountability: Track record of taking full ownership—from design through deployment to ongoing operations and improvements

Preferred Qualifications:

• Experience with cloud platforms (GCP, AWS, or Azure) including cost management tools
• Kubernetes and container orchestration at scale
• Infrastructure as Code (Terraform, Pulumi, etc.)
• Streaming data systems (Kafka, Pub/Sub, Kinesis, Flink, etc.)
• SRE principles and reliability engineering practices
• Experience with FinOps or infrastructure cost optimization
• Performance profiling and optimization (CPU, memory, I/O)
• Technical leadership experience including mentorship of teams and driving multi-component initiatives
• Open source contributions or recognized technical writing

• Sound knowledge of Core Java, JSP, Servlets & MVC, Spring
• Good knowledge of Java Script, Ajax
• Good knowledge of My SQL database server
• Experience in working with IDE like Eclipse or Netbeans
• Knowledge of Spring would be an advantage
• Great problem-solving attitude
• Strong OOP & OOAD fundamentals
• Knowledge of Java EE Design pattern
• Technical hands on Spring, Spring Security, Hibernate, JPA, Struts, OO JS, XML, Webservices (Restful, JAX-WS).
• Nice to have knowledge of Liferay, Amazon EC2, Google App Engine, Restful services, jQuery, YUI, EstJS (Sencha), frameworks.

• Understand the BRS / SRS document
• Coordinate with Team lead/DBA to understand the System design and Database design
• Development and Unit Testing
• Bug fixing and Change Request implementation

You will be working hands-on on a complex and compound product that has the potential to be used by millions of sales and marketing people around the world. Your contribution to delivering an excellent product platform that:

• enables quick iteration
• supports product customization
• and handles scale

What do we expect you to have?

• 2+ years of experience in backend engineering
• An intent to learn and an urge to build a product by learning different technologies
• Interest in writing complex, scalable, and maintainable backend applications
• Tech stack requirements:

Must haves

• Experience in building application server in Java (Spring / Spring boot) / NodeJS / Golang / Python
• Experience in using SQL databases and designing schemas based on application need
• Experience with container services and runtimes (docker / docker-compose / k8s)
• Experience with cloud paas (AWS / GCP / Azure cloud)
• Experience and familiarity with microservices’ concepts
• Experience with bash scripting

Good to have (Preferred)

• Preferred experience with org wide message queue (rabbitmq / aws sqs)
• Preferred experience with task orchestration services (apache airflow / aws step function)
• Preferred experience with infra as code (or system configuration) tools (terraform / chef / ansible)
• Preferred experience with build essential tools (make / makefile)
• Preferred experience with monitoring and tracing systems for performance / system / application monitoring (grafana + loki + prometheus / aws cloudwatch)

What will you learn?

• Building highly available, complex, compound, performant systems of microservices platform that acts as an API layer
• Industry-standard state-of-the-art tools + methodologies + frameworks + infra for building a product.
• Fable is not a trivial CRUD app. It requires a lot of consideration and care for building the API layer as the product is highly customizable per user.
• How different functions (sales, marketing, product, engineering) in a high-velocity product company work in synergy to deliver an iterative product in real life.

Who would you be working with?

• You would be directly working with the co-founder & CTO who has built multiple companies before and has built large teams in large-scale companies like ThoughtSpot, Unacademy, etc.

Position details

• Fully remote.
• 5 days/week (all public and government holidays will be non-working days).
• No specific work hours (we will sync over zoom over the course of the day).

About the company- FPL Technologies

Credit cards haven't changed much for over half a century so our team of seasoned bankers, technologists, and designers set out to redefine the credit card for you - the consumer. The result is OneCard - a credit card reimagined for the mobile generation. OneCard is India's best metal credit card built with full-stack tech. It is backed by the principles of simplicity, transparency, and giving back control to the user.

“Re-imaging credit and payments from First Principles”

Payments is an interesting engineering challenge in itself with requirements of low latency, transactional guarantees, security, and high scalability. When we add credit and engagement into the mix, the challenge becomes even more interesting with underwriting and recommendation algorithms working on large data sets. We have eliminated the current call center, sales agent, and SMS-based processes with a mobile app that puts the customers in complete control. To stay agile, the entire stack is built on the cloud with modern technologies. 

OneCard (Best credit card app) : http://www.getonecard.app/">www.getonecard.app

OneScore (Over 10 million downloads): http://www.onescore.app/">www.onescore.app

Create a consumer facing credit card product that will be used by millions of users. 

What you will do:

• Be a part of our backend for frontend/ credit card processing engineering teams to build the best homegrown credit card stack.
• Partner with the product teams to understand the product features and specifications, translate them into high level and low-level design.
• Work with frontend and backend developers to build out a customer-centric experience that will constantly evolve.
• Respond to support team tickets as needed to resolve bugs and issues.
• Participate in contributing ideas, updates, and product development areas to the team.

Experience Range: 

5- 7 years with technical hands-on experience in building large-scale B2C applications catering to millions of users. Previous experience in building scalable products is a must.

Technical Expertise:

• Strong insight into Java programming language (Class loading, Memory Management, Transactions, Executors, Lambdas and Streams).
• Experience in distributed technologies, real-time, high throughput and low latency systems.
• Hands-on prior experience with scalable Cloud based architectures.
• Experience in one or more frameworks like Spring is a plus but not required.
• Proficiency in data structures & algorithms.
• Strong problem solving and analytical skills.
• Any experience in payments is a plus.

About the company
Currently we are hiring for a VC backed startup a fast growing fintech startup based in Bangalore.

It is a super app to digitize India’s 50M+ sales agents where they can get access to relevant products & services, receive training through interactive videos on “how to sell, what to sell and whom to sell”, and earn money. For businesses, we help them save a huge effort in managing and training these agents and help them increase their reach to every nook and corner of the country.

India is a trust deficit market which cannot be accessed through Internet Marketing on Facebook and Google as the majority of the customers need training, push, motivation and a primer on why and how to use a product.

To solve this problem, traditional industries like BFSI, Telecom, Automobile, Real Estate etc. use 50M+ frontline sales executives to drive distribution. We believe that not just for these traditional industries but also for emerging companies in FinTech, EdTech etc these agents will play a pivotal role in accessing trust deficit customers.

They have grown to a  100,000+ agent network across India (growing 50% MoM) & are funded by tier1 VC’s and angels in India.

Summary of Role

As a lead of the consumer products software engineering division, you will take an active role in the definition and evolution of standard practices and procedures. You will be responsible for defining and developing software for tasks associated with the developing, designing and debugging of the software applications.

Responsibilities:

• Overlook development of all consumer products in JAVA
• Lead a team of 4-5 developers
• Optimize components for maximum performance across a vast array of web-capable devices and browsers
• Focus on code maintainability and performance of application
• Provide technical advice and assists in solving programming problems
• Continuously create new and interactive features that would help to improve user experience and user engagement.
• Assist with troubleshooting of issues as needed
• Lead the design and architecture of software solutions
• Assist in developing and maintaining continuous integration pipelines

Required Skills for this Role:

• JAVA
• Spring/Spring Boot
• Hibernate
• Linux
• REST
• Kafka
• Mysql
• AWS
• ELK Stack (Elasticsearch)
• CI/CD Pipelines
• Team Leadership experience of at least 3 year

Qualifications:

• 4+ years of experience in Java based technologies
• Experience in designing databases and system architecture
• Experience in building products from scratch at well funded start-ups
• Team Lead/Team Manager experience of at least 3 years

Job ID: RP1001

Required Experience- 4+ years

Expected joining within two weeks

Preferred Skills:

• Good communication skills in English (Written and Oral)
• Strong knowledge of RDBMS concepts
• Strong analytical and problem-solving skills
• Experience in performance tuning
• Experience in interaction with the customer
• Technical skills Java, HTML, CSS, TypeScript, SpringBoot, Hibernate, Microservices
• Preferred Tools (SVN, GIT, Maven, Jenkins Jira Confluence)
• Ability to explore the application by himself/herself from the training provided

Responsibilities:

• New feature development or enhancement or change request activities (Requirement analysis, Requirement documentation, Design, Coding, Review, Testing and Release process)
• Defect Fixing (Defect analysis, route cause identification, Code change, testing, obtaining user confirmation and release process)
• Support tasks (Ticket analysis, data uploading, performance tuning, job monitoring, any analysis task, ReportGeneration and etc.,)
• Level 2 and Level 3 support (Support process adherence)
• Functional and technical or solution documentation preparation
• Execution will either be Waterfall or Agile
• The process needs to be followed as defined by RBEI or RBEI’s Customer
• Preparation & participation in the project status and review meeting

Job Locations: Bangalore, Pune, Chennai, Dehradun, Mohali, Panchkula, or Gurugram (Currently Remote)

Job Description: 

We are looking for a Java developer responsible for developing Web applications using Core Java and JDBC. Your primary responsibility will be to quickly learn to design and develop applications, and to coordinate with the rest of the team working on different layers of the infrastructure. Thus, a commitment to collaborative problem solving, sophisticated design, and product quality is essential.

• Excellent knowledge of object-oriented programming.
• Well-versed in Core Java (1.7 and above preferable, with knowledge of new features like Executor framework, Generics, etc.).
• Excellent experience of collections, HashMap, concurrency packages, Exception Handling and Array List, sorting algorithm.
• Strong knowledge and understanding of real-time, low-latency multi-threaded server-side java code.
• Familiar with various design and architectural patterns.
• Skill for writing reusable Java libraries.
• Knack for writing clean, readable Java code.
• Experience with both external and embedded databases.
• Understanding fundamental design principles behind a scalable application.
• Basic understanding of the class loading mechanism in Java.
• Creating database schemas that represent and support business processes.
• Should possess good communication skills (both oral and written).
• Must be completely hands-on and an individual contributor and a self-starter.
• Must be able to complete assignments (suitable to his/her experience) with minimal assistance.
• Very good at Analytical and Logical skills.
• Solid understanding of the web development lifecycle.
• Ability to learn quickly and deliver software on time.

If you are looking forward for this opportunity, kindly apply with us with below asked details:

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