
Job Description
Paytm is looking for hands-on technologists, who will be responsible for architecting & designing new age mobile & web 3.0 products at Paytm.
Key Responsibilities
Incumbent will be architecting our futuristic mobile & web 3.0 products and choose the best
technologies, components and subsystems on different server side tech.
Driving innovations in the product constantly to remain ahead of the curve.
Serve as a thought leader and mentor on technical, architectural, design and related issues.
Proactively identify architectural weaknesses and recommend appropriate solutions.
Balance short-term versus long-term actions, strategic versus tactical requirements, while
continuing to move forward towards the strategic vision.
Collaborate with cross functional teams to solve complex problems and building products
spanning across multiple teams to deliver end-to-end products & features.
Estimates efforts, identify risks, devises and meets project schedules.
Provide functional, design, and code reviews in related areas of expertise with-in team and
cross-team.
Mentor / coach engineers to facilitate their development and provide technical leadership to
them.
Skills required
MS or BS/B.Tech in computer science or equivalent experience from top college.
3+ years of strong software design/development experience in building massively large scale
distributed internet systems and products.
Hands-on experience in Advanced Java/ Node.JS/other backend JavaScript
frameworks, MySQL/NoSQL, golang, etc.
Excellent data structure & algorithm and problem solving skills.
Experience and knowledge of open source tools & frameworks, broader cutting edge
technologies around server side development.
Should be an active contributor to developer communities like Stackoverflow, Topcoder, Github,
Google Developer Groups (GDGs).
Superior organization, communication, interpersonal and leadership skills.
Must be a proven performer and team player that enjoy challenging assignments in a high-
energy, fast growing and start-up workplace.
Must be a self-starter who can work well with minimal guidance and in fluid environment.

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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Job Description:
We are looking for a skilled Java Developer with 4+ years of experience. The ideal candidate should have hands-on experience in building scalable and high-performance applications using modern Java frameworks and cloud-based deployments. You will work with cutting-edge technologies, including microservices, reactive programming, and containerized deployments, to develop robust and efficient solutions.
Key Responsibilities:
• Develop, enhance, and maintain applications using Java, Spring, and Spring Boot.
• Implement authentication and authorization mechanisms using Keycloak.
• Design and develop scalable microservices with efficient communication using HTTP and gRPC.
• Utilize WebFlux and reactive programming principles to build non-blocking applications.
• Integrate and work with RabbitMQ for messaging and event-driven architecture.
• Work with PostgreSQL, ensuring optimized queries and database performance.
• Deploy applications on Google Cloud Platform (GCP), leveraging cloud-native services.
• Utilize Docker and containerization techniques for efficient application deployment.
• Implement unit testing and ensure code quality through best practices.
• Collaborate with cross-functional teams to design and develop robust solutions.
• Use Git for version control and participate in code reviews.
• Work with GoLang where needed for microservice or backend functionalities.
Required Skills:
• Strong experience with Java, Spring, and Spring Boot.
• Good understanding of Keycloak for authentication and authorization.
• Experience with HTTP, gRPC, and microservices architecture.
• Hands-on knowledge of WebFlux and reactive programming.
• Experience working with RabbitMQ for message brokering.
• Proficiency in PostgreSQL and writing efficient SQL queries.
• Familiarity with GCP deployment and cloud-native development.
• Experience with Git, Docker, and containerization.
• Strong understanding of unit testing frameworks like JUnit, Mockito, etc.
• Ability to work with GoLang when required.
Nice to Have:
• Experience with Kubernetes for container orchestration.
• Exposure to CI/CD pipelines and DevOps practices.
• Knowledge of security best practices in cloud-based applications.

Job Title - Golang Developer
Experience - 4- 8 years
Location - Bangalore / Gurugram
Primary Skills - Golang
Roles and Responsibilities:
1. Software Development
- Design, develop, and maintain applications using Golang.
- Write clean, scalable, and efficient code by adhering to Go best practices and conventions.
- Develop and deploy microservices, APIs, and backend systems using Go.
- Integrate third-party services, tools, and databases with Golang applications.
- Optimize application performance and ensure high availability and scalability.
2. System Architecture and Design
- Collaborate with architects and lead developers to design the structure and components of the software.
- Participate in designing the overall architecture of applications, ensuring it’s modular, maintainable, and secure.
- Define API contracts and integrate with frontend teams for seamless interaction between services and front-end systems.
3. Code Maintenance and Testing
- Write unit and integration tests to ensure code reliability and maintainability.
- Perform code reviews to ensure code quality and adherence to coding standards.
- Fix bugs and troubleshoot issues in existing Golang-based applications.
- Continuously monitor and refactor the code to improve maintainability and readability.
4. Concurrency and Parallelism
- Leverage Go’s concurrency features, such as goroutines and channels, to write highly concurrent applications that scale efficiently.
- Ensure effective use of resources by implementing parallel processing and handling multiple requests simultaneously.
5. Database Management and Integration
- Work with both SQL and NoSQL databases (such as PostgreSQL, MySQL, MongoDB, etc.) for data storage and retrieval.
- Write efficient queries and design database schemas that meet application needs while optimizing performance.
6. Collaboration with Cross-functional Teams
- Work closely with other developers, product managers, and designers to understand the requirements and deliver high-quality solutions.
- Participate in agile workflows, including sprint planning, stand-ups, and retrospectives.
- Collaborate with DevOps for the deployment and continuous integration (CI/CD) pipelines to ensure smooth application releases.
7. Documentation
- Write technical documentation and detailed code comments to make the codebase more understandable and maintainable.
- Document the design and development processes, API endpoints, and deployment procedures for better team collaboration and knowledge sharing.
8. Performance Optimization
- Analyze and optimize Go applications for better speed and resource consumption.
- Use profiling tools and best practices to identify and mitigate performance bottlenecks.
- Implement caching strategies and use efficient algorithms to improve response time.
9. Security Implementation
- Ensure secure coding practices and follow security guidelines when developing Go-based applications.
- Protect against common security threats, such as SQL injection, XSS, and CSRF.
- Implement proper encryption and authentication mechanisms (e.g., OAuth, JWT).
10. Version Control and Collaboration Tools
- Use version control systems like Git to manage code and collaborate with other developers.
- Engage with project management and communication tools like JIRA, Slack, or Trello for efficient project tracking.
11. Continuous Learning
- Stay updated with the latest developments in the Go language and related technologies.
- Continuously enhance programming skills and explore new libraries, tools, or frameworks to improve the software development process.
12. Deployment and Cloud Integration
- Experience with cloud platforms (such as AWS, GCP, Azure) for deploying Go-based applications.
- Ensure that applications are containerized using Docker and managed with Kubernetes.
- Set up automated deployment pipelines and continuous integration for efficient delivery.
Job Title - Java Developer
CTC - 15LPA
Experience - 5+ years
Location - Pune Only
Work Mode - Onsite
Good to Have- Java , spring Framework , Spring Boot.
Qualification - Bachelor’s or master’s degree in computer science
Roles and Responsibilities:
∙Design, develop, test, and maintain high-quality Java applications
∙Implement and optimize Microservices architecture using Spring Boot
∙Utilize Hibernate for efficient data management and database interactions
∙Implement and optimize asynchronous communication using technologies such as
Active MQ, Google Cloud Pub/Sub, Apache Kafka, etc.
∙Write unit tests using Junit and Mockito for robust code coverage
∙Collaborate with cross-functional teams to define and implement features
∙Perform code reviews to ensure code quality and adherence to coding standards
∙Utilize SQL for effective database querying and manipulation
∙Work with GIT for version control and code collaboration
∙Track and manage tasks using JIRA
We are looking for a focussed, energetic and motivated Senior Java Developer. You must have sufficient experience in Java Development, Spring, Spring Boot, AWS and SQS, S3. You will be challenged with complex and robust product development.
As a Senior Java Developer, you will be the most senior developer within the company working alongside other Java Developers, the Engineering Manager, and the CTO.
Senior Java Developer requirements
Solid development experience using Java, Springboot, SQS, S3 and Microservices
Experience working in Swing Java framework
Revises, updates, refactors, and debugs code
Write clear, concise and efficient code and ensure it is fully tested
Service and develop features using Java with AWS, JUnit, SQL and Spring framework
You have a good knowledge of Cloud technologies (ideally AWS)
Participate in peer coding reviews and work in a collaborative, agile environment
Demonstrate technical knowledge and expertise with a clear understanding on the products' technical composition
Senior Java Developer responsibilities
7-9 yrs minimum work experience
Excellent analytical, troubleshooting, and communication skills
Excellent attention to detail and time-management skills
Serves as an expert on developed applications
Ability to adapt and learn new product/technology is key
Collaborates with internal teams to produce software design and architecture
Knowledge of Agile frameworks (i.e. Scrum) and has worked with Jira or Spira
Attend daily stand-up meetings alongside the Scrum Master
A self-starter, hardworking and committed individual
Work UK hours - ideally 9.00am - 6pm with the expectation to work out of ours when needed
Context for the Candidates:
Blockchain engineers are tasked with building secure, scalable, and high-performance decentralized applications. This discussion focuses on how to utilize key technologies—Node.js, Rust, Go, TypeScript, Ethers.js, viem, and Hardhat—in smart contract and blockchain system development, while addressing the practical challenges that arise in such projects.
Key Discussion Points:
• How do you integrate Node.js, Rust, Go, and TypeScript in blockchain-backed applications?
• Discuss the trade-offs between using Rust or Go for performance-critical blockchain services.
• What are the key challenges in ensuring the security and scalability of smart contracts using tools like Ethers.js, viem, and Hardhat?
• How do you approach testing, debugging, and deploying smart contracts in a decentralized environment?
• Share best practices for gas optimization, contract upgradability, and backend scalability.
Evaluation Criteria:
1. Technical Knowledge:
• Strong knowledge of Node.js, Rust, Go, and TypeScript with practical experience in blockchain development.
• Proficiency in Ethers.js, viem, Hardhat, and smart contract lifecycle (development, testing, deployment).
• Understanding of security best practices, performance optimizations, and scalability in decentralized systems.
2. Problem-Solving and Integration Skills:
• How candidates approach integrating smart contract solutions with backend services using Node.js, Rust, Go, and TypeScript.
• Solutions proposed for common challenges in blockchain projects such as gas fees, security vulnerabilities, and system bottlenecks.
3. Experience and Expertise:
• Minimum of 2 years of IT experience, including hands-on development with the specified technologies.
• Practical knowledge of blockchain architecture, consensus mechanisms, and decentralized application deployment.
4. Innovation and Critical Thinking:
• Candidates’ ability to think creatively about system architecture, proposing scalable and secure solutions for blockchain-based applications.
• Discussion on the future potential of blockchain technology and how the tech stack can evolve.
5. Communication and Team Collaboration:
• Clear articulation of technical challenges and how to address them in a team setting.
• Ability to lead or contribute to discussions in a way that encourages collaboration and team-driven problem-solving.
• Minimum 8+ Years of software development/programming experience.
• Any Bachelor’s or Master’s degree, not limiting to Engineering.
• Must be detail oriented.
• Experience with Agile methodologies.
• Strong communication skills and fluent in English (written and spoken)
• Keywords are team player, proactive, attention to detail, independent, strong analytical skills and
the ability to adapt to new challenges
Responsibilities:
• 8+ Years of software development/programming experience
• 3+ Years of experience in Drop-wizard/Spring Boot Microservice
• Strong experience building multi-threaded applications using Java 8 and above
• Experienced in Agile development methodologies / Continuous Integration
• Java Design Patterns
• Amazon AWS EC2/S3/RDS
• OpenAPI, Contract first development experience
• Strong Java Concurrency (Java Threading)
• DDD (Domain Driven Design)
• Testing frameworks Like Mockito
• Test driven development experience
• JIRA, Git, Github and Github actions
Department: Information Systems
Reports to: Tech Lead - Regulatory Reporting IT, Product Control IT & Reference Data IT Internal Development & Support
About the Department: Information Systems
The Information Systems Department (‘ISD’) provides a full range of state of the art technology services to all departments within Mizuho International plc in London. This includes teams servicing the client-facing business units, Operations, Finance and Risk departments.
The department utilises modern delivery methodologies & techniques including Agile, Containerisation & Continuous integration.
Each team has resources to provide project management, analysis, software development, package implementation, systems integration services and application support and is expected to contribute to the change.
Primary Responsibilities
Summary
Within Regulatory Reporting, Reference Data & Product Control IT team, the developer will work towards enhancing and supporting our newly delivered financial data reference data platform, GoldenSource. This requires involvement in development and post production support project life cycle. This role will expose the individual to all business areas, including front office, settlements, custody and accounting.
This role will also involve providing 3rd Line support for any implemented solutions including incident, problem, and defect management
Specific Responsibilities
Design and development of the instrument reference data module
Conduct systems testing and support user acceptance testing
Dealing with day-to-day production problems and maintenance. This may require working shifts and/or being on-call out of normal working hours.
Adhering to Mizuho International development standards and procedures, including change control
Person Specification
Essential
Knowledge of the GoldenSource product
Experience in implementing and supporting the GoldenSource product in a financial institution
Minimum five years’ experience in Java and J2EE
Experience in using object oriented methodologies
Desirable
A broad understanding of Fixed Income, Equity and/or Futures processing through investment banking experience
Experience in using TDD/BDD agile methodology
Technical Knowledge/Skills
Essential
Experience with Publish/Subscribe messaging paradigms, distributed transaction processing based on JTA/JTS
Experience with installing, configuring and monitoring JBoss
GoldenSource Security master module
GoldenSource Customer & Counterparty module
UNIX skills in particular Linux
Excellent relational database skills, preferably ORACLE
Experience of using automated testing tools such as JUnit and mocking libraries such as jMock
Experience of working with XML based technologies such as XSLT
Desirable
Experience of Subversion, Ant, Maven and CI frameworks such as Bamboo.
Building connectors using the GoldenSource product tools
Experience of software configuration management
Experience with integration/acceptance testing frameworks such as FitNesse
WebServices
Document database experience, preferably MongoDB
Experience of Javascript on the client and Node.js
Qualifications
Degree or equivalent.
Active participant in relevant forums/external working groups.
Key Behaviors/Competencies
Operational Effectiveness and Innovation: Achieving Quality Results:
Delivering Tasks – Silver
Problem Solving – Silver
Flexibility & Drive to Improve – Silver
Risk Awareness – Silver
Enhance product Scope:
Strategic Business Management – Silver
Business Awareness – Silver
People:
Leadership – Silver
Management – Silver
Communication – Silver
Ethics and Conduct Level 1 – Silver
Ethics and Conduct Level 2 – Silver
Client Centricity – Silver
Effective Collaboration:
Team Working in Your team – Silver
Team Working With Other Teams – Silver


- 3-5 Years of experience in Backend Development.
- Must have experience in Python (FLASK framework).
- Have a Deep understanding of how RESTful APIs work.
- Familiar with various design and architectural patterns that can work at scale.
- Sound knowledge of NoSQL/SQL Databases (Mongo DB preferred).
- Strong experience with at-Cloud technology, preferably AWS or GCP, or Azure.
- Core experience in developing complex backend systems.
- Communicating complex technical concepts to both technical and non-technical audiences.
- Passionate about application scalability, availability, reliability, and security.

