Senior Software Engineer - Backend

Job Title : Python Developer – API Integration & AWS Deployment

Experience : 5+ Years

Location : Bangalore

Work Mode : Onsite

Job Overview :

We are seeking an experienced Python Developer with strong expertise in API development and AWS cloud deployment.

The ideal candidate will be responsible for building scalable RESTful APIs, automating power system simulations using PSS®E (psspy), and deploying automation workflows securely and efficiently on AWS.

Mandatory Skills : Python, FastAPI/Flask, PSS®E (psspy), RESTful API Development, AWS (EC2, Lambda, S3, EFS, API Gateway), AWS IAM, CloudWatch.

Key Responsibilities :

Python Development & API Integration :

• Design, build, and maintain RESTful APIs using FastAPI or Flask to interface with PSS®E.
• Automate simulations and workflows using the PSS®E Python API (psspy).
• Implement robust bulk case processing, result extraction, and automated reporting systems.

AWS Cloud Deployment :

• Deploy APIs and automation pipelines using AWS services such as EC2, Lambda, S3, EFS, and API Gateway.
• Apply cloud-native best practices to ensure reliability, scalability, and cost efficiency.
• Manage secure access control using AWS IAM, API keys, and implement monitoring using CloudWatch.

Required Skills :

• 5+ Years of professional experience in Python development.
• Hands-on experience with RESTful API development (FastAPI/Flask).
• Solid experience working with PSS®E and its psspy Python API.
• Strong understanding of AWS services, deployment, and best practices.
• Proficiency in automation, scripting, and report generation.
• Knowledge of cloud security and monitoring tools like IAM and CloudWatch.

Good to Have :

• Experience in power system simulation and electrical engineering concepts.
• Familiarity with CI/CD tools for AWS deployments.

Job Title: Lead Backend Web App Developer

Experience: 10–15 Years

Location: Bengaluru (Hybrid)

Role Overview:

We are seeking an experienced Lead Backend Web App Developer to design and maintain scalable, cloud-based backend systems. This role demands expertise in microservices, AWS, and backend technologies to deliver efficient and high-performing applications.

Key Responsibilities:

• Build and maintain scalable backend systems for cloud-based web applications.
• Develop microservices using AWS (Lambda, SQS, SNS) and databases (MySQL, NoSQL).
• Design and implement REST APIs for seamless communication between systems.
• Create containerized solutions with Docker for efficient deployment.
• Solve real-world problems with enterprise-class product designs.
• Contribute to key decisions on product and technology direction.
• Promote frameworks, standards, and new technologies within the team.

Required Skills:

• Experience: 10+ Years in Backend Development; 3+ Years in large-scale, microservices-based projects.
• Backend Technologies: Proficiency in Python, Node.js, and Java.
• Cloud Expertise: Strong experience with AWS services (Lambda, SQS, SNS).
• Database Skills: Expertise in MySQL and NoSQL databases.
• Microservices Architecture: Deep understanding of distributed systems and scalability.
• DevOps Tools: Hands-on experience with Docker.
• API Development: Proven expertise in designing and consuming REST APIs.
• Soft Skills: Excellent problem-solving and communication abilities.

Why Join Us?

• Work on impactful projects with real-world applications.
• Solve complex problems in a dynamic, fast-paced environment.
• Collaborate with a team of skilled professionals.

We are seeking enthusiastic and motivated fresh graduates with a strong foundation in programming, primarily in Python, and basic knowledge of Java, C#, or JavaScript. This role offers hands-on experience in developing applications, writing clean code, and collaborating on real-world projects under expert guidance.

Key Responsibilities

• Develop and maintain applications using Python as the primary language.

• Assist in coding, debugging, and testing software modules in Java, C#, or JavaScript as needed.

• Collaborate with senior developers to learn best practices and contribute to project deliverables.

• Write clean, efficient, and well-documented code.

• Participate in code reviews and follow standard development processes.

• Continuously learn and adapt to new technologies and frameworks.

Core Expectations

• Eagerness to Learn: Open to acquiring new programming skills and frameworks.

• Adaptability: Ability to work across multiple languages and environments.

• Problem-Solving: Strong analytical skills to troubleshoot and debug issues.

• Team Collaboration: Work effectively with peers and seniors.

• Professionalism: Good communication skills and a positive attitude.

Qualifications

• Bachelor’s degree in Computer Science, IT, or related field.

• Strong understanding of Python (OOP, data structures, basic frameworks like Flask/Django).

• Basic knowledge of Java, C#, or JavaScript.

• Familiarity with version control systems (Git).

• Understanding of databases (SQL/NoSQL) is a plus.

NOTE: Laptop with high speed internet is mandatory

Have an experience building backend server side applications in Node.js and Express.js

Have in-depth knowledge and experience of using ES6+ features and Object Oriented Principles

Have sound knowledge and are familiar with databases like MongoDb - (Preferred) and Mysql.

Have good exposure to cloud native technologies (AWS Lambda, S3, RDS, etc) 

Have working knowledge of version control (Git) and continuous deployment 

Have experience in optimising backend API’s and database queries for optimal performance.

You are good at problem solving and have analytical skills 

You are flexible in adapting new technologies and frameworks as per the projects needs

As an SDE, you will develop a deep understanding of our business, work closely with development teams and own the architecture and end-to-end delivery of software components.

Requirements:

• Exp: 3 - 8 years.
• 4 + years' experience building successful production software systems.
• A solid grounding in Computer Science fundamentals (based on a BS or MS in CS or related field).
• The ability to take convert raw requirements into good design while exploring technical feasibility tradeoffs.
• Expertise in System design (design patterns, LLD, HLD, Solid principle, OOAD, Distributed systems etc. ), Architecture (MVC/Micro services).
• Excellence in technical communication.
• Has experience in mentoring other software developers.
• BS/MS in Computer Science or equivalent.
• Experience developing service oriented architectures and an understanding of design for scalability, performance and reliability.
• Demonstrated ability to mentor other software developers to maintain architectural vision and software quality.
• Demonstrated ability to achieve stretch goals in a highly innovative and fast paced environment.
• Expertise in delivering high-quality, innovative application.
• Strong desire to build, sense of ownership, urgency, and drive.
• Strong organisational and problem solving skills with great attention to detail.
• Ability to triage issues, react well to changes, work with teams and ability to multi-task on multiple products and projects.
• Experience building highly scalable, high availability services.
• The ideal candidate will be a visionary leader, builder and operator.
• He/she should have experience leading or contributing to multiple simultaneous product development efforts and initiatives.
• He/she needs to balance technical leadership with strong business judgment to make the right decisions about technology choices.
• He/she needs to be constantly striving for simplicity, and at the same time demonstrate significant creativity, innovation and judgme.
• Proficiency in, at least, one modern programming language.
• Experience in SQL or Non-SQL database.
• Strong sense of ownership, urgency, and drive.
• Demonstrated leadership abilities in an engineering environment in driving operational excellence and best practices.
• Demonstrated ability to achieve stretch goals in a highly innovative and fast paced environment.
• Excellent communication, collaboration, reporting, analytical and problem solving skills.
• Good understanding of at least some of the modern programming languages (Java) and open-source technologies

Role: Senior Software Engineer – Backend                                            Location: Bangalore / Gurgaon / Pune

About the Role

The successful backend engineer will work closely and collaboratively with cross functional teams during all phases of the software development lifecycle.

The incumbent should be competent to provide quick solutions to problems and taking a product or a product’s component through the entire life cycle, optimize the space / time complexity and improve on usability and reliability.

What you’ll be doing:

• Bachelor's degree in Computer Science or related field from top notch colleges 
• 4 + years of software development engineering.
• Understanding of fundamental design principles (including MVC).
• Good hands on in AWS scalable environment.
• Experience with different RDBMS and No SQL databases like MySQL, mongo, etc.
• Experience in designing scalable micro-services required.
• Strong knowledge of CS fundamentals including data structures, algorithm design and complexity analysis.
• Proficiency in one language that emphasizes class abstractions (for e.g. Java) and have coded in it for at least 4 years.
• Excellent communication, analytical and problem solving skills.
• Strong organizational skills and the ability to prioritize and work with clients with great efficiency.
• Excellent written and oral communication and presentation skills and the ability to express thoughts logically and succinctly.
• Open minded, Team builder, Good communicator and ability to lead and inspire teams.
• Demonstrated ability to achieve stretch goals in a highly innovative and fast paced environment.
• Experience in dealing with ambiguous/undefined problems; ability to think abstractly

What are we looking for?

• 4 to 10 years of hands on design / development experience. 
• Tech / M.Tech Computer Science or equivalent field from a premier institutes. 
• Proficient in Java OR C/C++, data structures, algorithms and OO design / design patterns. 
• Strong understanding of Computer Science fundamentals. 
• Technical depth in OS, computer architecture and OS internals. 
• Ability to write scalable and maintainable code. 
• Self-starter and goal-oriented with strong analytical and problem-solving skills. 
• Must be able to work cooperatively within a strong diverse technical community to expedite development tasks.
• Experience in Machine Learning is a plus

 
What we offer

• Competitive salary and excellent benefits, in a diverse working environment with inspiring and hardworking colleagues
• A positive, get-things-done workplace.
• An inclusive environment that ensures we listen to a diverse range of voices when making decisions.
• Ability to learn cutting edge concepts and innovation in an agile start-up environment with a global scale.
• A flexible working environment where you can drive your outcomes.

About us

At PayU, we are a global fintech investor and our vision is to build a world without financial borders where everyone can prosper. We give people in high growth markets the financial services and products they need to thrive. Our expertise in 18+ high-growth markets enables us to extend the reach of financial services. This drives everything we do, from investing in technology entrepreneurs to offering credit to underserved individuals, to helping merchants buy, sell, and operate online. Being part of Prosus, one of the largest technology investors in the world, gives us the presence and expertise to make a real impact. Find out more at www.payu.com

Our Commitment to Building A Diverse and Inclusive Workforce

As a global and multi-cultural organization with varied ethnicities thriving across locations, we realize that our responsibility towards fulfilling the D&I commitment is huge. Therefore, we continuously strive to create a diverse, inclusive, and safe environment, for all our people, communities, and customers. Our leaders are committed to create an inclusive work culture which enables transparency, flexibility, and unbiased attention to every PayUneer so they can succeed, irrespective of gender, color, or personal faith. An environment where every person feels they belong, that they are listened to, and where they are empowered to speak up. At PayU we have zero tolerance towards any form of prejudice whether a specific race, ethnicity, or of persons with disabilities, or the LGBTQ communities.

•  5-10 years of experience in building API services using NodeJS Express and related frameworks
• Expert level understanding of NodeJS asynchronous runtime
• Expert level understanding of Javascript concepts on callbacks and closures
• Experience with Postgres, NoSQL, Redis, and Firebase real-time database
• Experience with AWS services like Elastic Beanstalk, Cloudfront, S3, EC2, Lambda, API Gateway, SQS, etc
• Understanding of patterns and techniques for building scalable back-end infrastructure including caching, rate limiting, authentication, and authorization schemes.
• Experience in building highly scalable and high throughput services with millisecond response times
• Experience working in a collaborative team environment
• Excellent communication & interpersonal skills
• Willingness to learn and pick up new technology along with patience to mentor

Bonus skills – 

• Experience with Elastic Search, Puppeteer
• Experience writing unit test

We are an IIT Bombay incubated, early stage healthcare start up developing a mobile based Ai technology to help reduce health risks for women during their pregnancy. Our Founders are Harvard and Columbia University alums with extensive experience in digital health in the US and India.

Role: Back end developer ( Python + Flask/Django, Location Mumbai, Marol):

Must have:

• 1-4 years hands on experience in Core Python with preferably Flask framework for complex web and mobile applications. 
• Deployment experience
• Must have experience with Mongodb, MySQL and AWS
• Experience in Redis, Aerospike 
• Good command of API development and deployment ( G Unicorn, Supervisor, Jenkins) Algorithms, system design, OOPS concepts.
• Agility and flexibility to in start up environement with focus on customer, excellent communication skills, and high level of responsibility and responsiveness.
• Project management, scheduling, allocation and delivery.
• Proven experience in agile development, sprint planning and backlog management.

Good to Have:

Experience in Machine Learning, Dialogflow or Rasa for NLP,