Java Developer at Paytm · Noida, Bengaluru (Bangalore), Pune · 3 - 8 years · ₹10L - ₹40L / yr · Raised funding · Posted 26 Jul 2022

About Paytm
About
About Us:
Paytm is India’s leading digital payments and financial services company, which is focused on driving consumers and merchants to its platform by offering them a variety of payment use cases. Paytm provides consumers with services like utility payments and money transfers, while empowering them to pay via Paytm Payment Instruments (PPI) like Paytm Wallet, Paytm UPI, Paytm Payments Bank Netbanking, Paytm FASTag and Paytm Postpaid - Buy Now, Pay Later. To merchants, Paytm offers acquiring devices like Soundbox, EDC, QR and Payment Gateway where payment aggregation is done through PPI and also other banks’ financial instruments. To further enhance merchants’ business, Paytm offers merchants commerce services through advertising and Paytm Mini app store. Operating on this platform leverage, the company then offers credit services such as merchant loans, personal loans and BNPL, sourced by its financial partners.
Why join us:
- Because you get an opportunity to make a difference, and have a great time doing that.
- You are challenged and encouraged here to do stuff that is meaningful for you and for those we serve.
- You should work with us if you think seriously about what technology can do for people.
- We are successful, and our successes are rooted in our people's collective energy and unwavering focus on the customer, and that's how it will always be.
Connect with the team
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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.
Core AI Backend Engineer – LLM Fine-Tuning
You know that moment when you don’t just debug code — you train a model, fine-tune it, and suddenly it understands your domain better than you expected? That’s the kind of magic we’re looking for.
We’re building something that turns chaotic social video data into crystal-clear business intelligence. Not just another API — but AI-backed architecture fine-tuned to our world. Systems that marketing teams thank you for, because they feel the intelligence, not just the infrastructure.
Either you feel the craft when you read this, or you don’t. This isn’t just another backend role. This is where you bring together scalable systems and cutting-edge LLMs to build something the world hasn’t seen before.
Who We Are
We’re a small, global team that ships fast. Every line of code and every model choice affects millions of video analysis requests.
Our engineers don’t just build APIs — they architect solutions, they optimize at scale, and now, they fine-tune models to make AI work in the real world. Our CPTO still codes. Our senior engineers make complexity look effortless. Our backend team sets a standard that others ask how we move so fast.
What We Need
We need someone who’s lived both sides of this life:
- Backend excellence: building high-scale, high-performance systems.
- LLM fine-tuning: hands-on with open-source models, not just calling APIs.
Someone who can sit with a requirement at 2pm and by 6pm not only has endpoints working, but also has a fine-tuned model running behind them — customized to our use case.
Your Craft
- JavaScript/TypeScript & NodeJS as core backend tools.
- Next.js for full-stack where needed.
- Rust when performance is non-negotiable.
- Golang/Python as comfortable tools of choice.
- MySQL/Postgres/Redis — wielded with intention.
- AWS ecosystem — your playground, not your puzzle.
- LLM/AI integration you’ve actually shipped.
- Open-source LLM fine-tuning experience:
- Bringing in open-source models (LLaMA, Mistral, Falcon, etc.).
- Fine-tuning/adapting them for specific domains.
- Optimizing for inference cost, latency, and accuracy.
The Reality
The work is beautifully complex. The scale is real and growing. The problems are the kind that wake you up at 3am with solutions.
If you get your energy from building backend systems and adapting LLMs to make them smarter for real-world use, you’ll probably fall in love with what we do. If you’re only interested in APIs without touching models, this won’t be your thing — and that’s completely okay.
How to Apply
If you’re reading this thinking “finally, a team that actually cares about real AI engineering” — we’d love to see something you’ve built.
Not just a resume. Show us your craft:
- An LLM fine-tuning repo.
- A domain-adapted model you worked on.
- A system design where you combined backend and AI.
- Or even a short write-up or voice note explaining what you’ve fine-tuned.
We’re genuinely excited to see what you’ve done and have a meaningful conversation about whether this could be magic for both of us.
Job Details
- Job Title: Staff Engineer
- Industry: Technology
- Domain - Information technology (IT)
- Experience Required: 9-12 years
- Employment Type: Full Time
- Job Location: Bengaluru
- CTC Range: Best in Industry
Role & Responsibilities
As a Staff Engineer at company, you will play a critical role in defining and driving our backend architecture as we scale globally. You’ll own key systems that handle high volumes of data and transactions, ensuring performance, reliability, and maintainability across distributed environments.
Key Responsibilities-
- Own one or more core applications end-to-end, ensuring reliability, performance, and scalability.
- Lead the design, architecture, and development of complex, distributed systems, frameworks, and libraries aligned with company’s technical strategy.
- Drive engineering operational excellence by defining robust roadmaps for system reliability, observability, and performance improvements.
- Analyze and optimize existing systems for latency, throughput, and efficiency, ensuring they perform at scale.
- Collaborate cross-functionally with Product, Data, and Infrastructure teams to translate business requirements into technical deliverables.
- Mentor and guide engineers, fostering a culture of technical excellence, ownership, and continuous learning.
- Establish and uphold coding standards, conduct design and code reviews, and promote best practices across teams.
- Stay ahead of the curve on emerging technologies, frameworks, and patterns to strengthen company’s technology foundation.
- Contribute to hiring by identifying and attracting top-tier engineering talent.
Ideal Candidate
- Strong staff engineer profile
- Must have 9+ years in backend engineering with Java, Spring/Spring Boot, and microservices building large and schalable systems
- Must have been SDE-3 / Tech Lead / Lead SE for at least 2.5 years
- Strong in DSA, system design, design patterns, and problem-solving
- Proven experience building scalable, reliable, high-performance distributed systems
- Hands-on with SQL/NoSQL databases, REST/gRPC APIs, concurrency & async processing
- Experience in AWS/GCP, CI/CD pipelines, and observability/monitoring
- Excellent ability to explain complex technical concepts to varied stakeholders
- Product companies (B2B SAAS preferred)
- Must have stayed for at least 2 years with each of the previous companies
- (Education): B.Tech in computer science from Tier 1, Tier 2 colleges
Company is a direct to consumer brand in affordable fast fashion space using full stack model to solve for high quality at affordable prices. We leverage in-house manufacturing coupled with strong usage of technology to drive efficiency. Rapidbox is funded by Top-Tier VC firms and
prominent angel investors.
Must Have Skills (Working Experience Needed):
Preferably a Graduate/Postgraduate from a Tier 1/2 college/university.
Core Java
Hibernate and any relational database – MySQL, Postgres, Oracle.
Redis Caching
Spring
Maven, Git
Ability to thrive in a dynamic environment with changing priorities
Spring
Experience with OO design, design patterns & deep understanding of JVM internals
(multithreading, garbage collection etc.)
Problem solver
Search solutions like ES, Solr
NoSQL data store like Cassandra/Mongo
Kafka
Microservices Architecture, Web services, API development, Enterprise integration
Experience on scalable and distributed systems
Good to have:
Distributed Cache
Performance testing tools - Jmeter, Locust, Gatling
Ecommerce background
Job Description:
We are seeking a talented and experienced Backend Developer with a strong proficiency in Node.js and expertise in database management. As a Backend Developer, you will play a crucial role in the development and maintenance of our software systems, ensuring their high performance and responsiveness.
Responsibilities:
· Design, develop, and maintain backend services using Node.js.
· Collaborate with cross-functional teams to define software requirements and specifications.
· Optimize and scale applications for maximum speed and scalability.
· Implement security and data protection measures.
· Troubleshoot and resolve issues in a timely manner.
· Collaborate with front-end developers to integrate user-facing elements with server-side logic.
· Stay up-to-date with emerging technologies and best practices in backend development.
Requirements:
· Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent work experience).
· Minimum of 2 years of professional experience in Node.js development.
· Proficiency with databases, preferably MongoDB or DynamoDB.
· Strong understanding of RESTful API design and development.
· Experience with version control systems, such as Git.
· Familiarity with cloud platforms in AWS is a plus.
· Excellent problem-solving and debugging skills.
· Strong communication and teamwork skills.
· Ability to work independently and manage multiple tasks efficiently.
· Proven track record of delivering high-quality code on schedule.
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
ython Developer responsibilities include:
- Writing effective, scalable code
- Developing back-end components to improve responsiveness and overall performance
- Integrating user-facing elements into applications
Job brief
We are looking for a Python Developer to join our engineering team and help us develop and maintain various software products.
Python Developer responsibilities include writing and testing code, debugging programs and integrating applications with third-party web services. To be successful in this role, you should have experience using server-side logic and work well in a team.
Ultimately, you’ll build highly responsive web applications that align with our business needs.
Responsibilities
- Write effective, scalable code
- Develop back-end components to improve responsiveness and overall performance
- Integrate user-facing elements into applications
- Test and debug programs
- Improve functionality of existing systems
- Implement security and data protection solutions
- Assess and prioritize feature requests
- Coordinate with internal teams to understand user requirements and provide technical solutions
Requirements and skills
- Work experience as a Python Developer
- Expertise in at least one popular Python framework (like Django, Flask or Pyramid)
- Knowledge of object-relational mapping (ORM)
- Familiarity with front-end technologies (like JavaScript and HTML5)
- Team spirit
- Good problem-solving skills
- BSc in Computer Science, Engineering or relevant field
Developed in formal collaboration with the University of Cambridge in May 2000, HeyMath! is an Ed-Tech company whose mission is to Raise the Game in Maths for school systems around the world. We do this using technology to deliver engaging teaching methodologies and personalised learning paths for students. HeyMath! has been successfully adopted by CBSE schools since 2004, with positive outcomes for the entire ecosystem.
Check us out at www.heymath.com
We plan to work mainly from home in 2021 and the virtual office atmosphere is collegiate, informal and friendly, with small high-impact teams making a difference to customers.
What we are looking for:
Experience in building and re-engineering cloud based solutions on AWS.
Strong knowledge of Object Oriented Programming(OOPS) and design patterns is a must.
Hands-on development on Spring MVC framework.
Experience working on Java 8 or above.
Must have very good knowledge of RDBMS such as MySQL and performance tuning of the same.
Exposure to server-side and client-side caching mechanisms.
Ability to debug the applications and provide instant workable solutions.
Experience working on Elastic Search / Kafka / Kubernetes or all is a nice to have.
About us:-
Zupee is India's hottest Real Money Gaming Platform
With in 1 yr of start, we just had an initial team of around 30 people, these 30 were successful to bring 10 Million+ users and an overall consumer spend of 1.5 Billion USD on the platform, the journey which needed years to be covered was covered with in 1yr. As we speak today, Zupee has been profitable for almost an year now and has ended the year 2020 with a team size of 70+ and over all growth rate was mapped around 20X.
Our user base has significantly gone up and we have invested highly in technology and have got best in class tech stack, it's time to add the backend developers who can help us scale up the platform so that we can drive profitable growth and become the market leader in our space.
Backend Developer :- (3 - 12 yrs)
What You'll Need?
- Knowledge of languages (JavaScript, Python) and frameworks/systems (nodejs)
- Strong analytical skills and aptitude
- Understanding of data architecture, software design and best coding practices
- Understanding of TCP/IP networking concepts and technologies
- Ability to learn new languages and technologies
- Experience with databases (both SQL and NoSQL)
- Familiarity with Agile development methodologies
- Working knowledge of Linux








