Designing and developing high-volume, low-latency applications for
critical systems and delivering high-availability and performance
• Contributing in all phases of the development lifecycle
• Writing well designed, testable, efficient code
• Test cases should be upto the mark
• Performance tuning knowledge is a must. Experience is an added advantage.
• In Backend – fundamentals of all languages is a must• Good hands-on software development experience with proven working experience
in Python development
• Expert in Python, with knowledge of at least one Python web framework (such
as Django, Flask)
• Familiarity with some ORM (Object Relational Mapper) libraries
• Able to integrate multiple data sources and databases into one system
• Understanding of the threading limitations of Python, and multi-process
architecture
• Strong unit test and debugging skills
• Basic understanding of front-end technologies, such as JavaScript, HTML5, and
CSS3
• Understanding of memory model/GC from performance point of view.

About 91social
About
Connect with the team
Similar jobs
Job Title: Backend Engineer – Python (AI Backend)
Location: Bangalore, India
Experience: 1–2 Years
Job Description
We are looking for a Backend Engineer with strong Python skills and hands-on exposure to AI-based applications. The candidate will be responsible for developing scalable backend services and supporting AI-powered systems such as LLM integrations, AI agents, and RAG pipelines.
Key Responsibilities
- Develop and maintain backend services using Python (FastAPI preferred)
- Build and manage RESTful APIs for frontend and AI integrations
- Support development of AI-driven features (LLMs, RAG systems, AI agents)
- Design and maintain both monolithic and microservices architectures
- Optimize database performance and backend scalability
- Work with DevOps for Docker-based deployments
Required Skills
- Strong experience in Python backend development
- Hands-on experience with FastAPI / Django / Flask
- Knowledge of REST APIs and microservices
- Experience with AI applications (LLM usage, prompt engineering basics)
- Database knowledge: MongoDB, PostgreSQL or MySQL
- Experience with Docker and basic cloud platforms (AWS/GCP/Azure)
- Hands-on experience with Redis for caching and in-memory storage
Good to Have
- Experience integrating payment gateways (Razorpay, Stripe, PayU, etc.)
- Exposure to event-driven architectures using RabbitMQ, Kafka, or Redis Streams
- Kubernetes
- Understanding of model fine-tuning concepts

Founded in 2012,leader in high-assurance digital identity verification technology. Named to Forbes’ 2019 AI 50 list as one of America’s most promising AI companies, and a recent winner of API World’s Best Data API, technology applies artificial intelligence and machine learning techniques with trusted online/offline data intelligence from email, address, phone, IP, social media and the broader Internet to verify identities in real-time. Customers include three of the top five U.S. banks, seven of the top 10 U.S. card issuers, as well as the majority of leading digital banks, lenders and insurers across the U.S. We are funded by some of the world's best investors and entrepreneurs including Scale Venture Partners, Commerce Ventures, Work-Bench, Santander InnoVentures and Two Sigma Ventures.
The only way we can further our mission of becoming the single, trusted source of identity verification and eliminating identity fraud is by building the best team on the planet. This is where you come in!
We are hiring Software Engineers across all levels in Chennai!
What You'll Be Doing:
- You will partner with our globally distributed cross-functional teams (Product, Infrastructure, Engineering, Data Science) to conceptualize and develop new features and products in an Agile environment.
- You will own end-to-end delivery of software components all the way to production, owning team features or systems.
- You will be building web services and REST APIs at scale, and producing high-quality results with direct business impact.
- You will be monitoring and improving existing deployments, ensuring that we are continuously improving our product.
- You will be assisting our QA and support team in triaging and resolving production issues and addressing bugs.
What You'll Bring:
- You are interested in our tech stack (Java or Scala, SQL Databases, NoSQL, Microservices, and AWS)
- You will have strong computer science fundamentals: data structures, algorithms, various programming languages, distributed systems, etc.
- You understand engineering best practices and seek to improve engineering standards, tooling and processes.
- You write “good code” - easily understandable, secure and testable!
- You are comfortable helping drive technical decisions within our Engineering team.
- You have experience building applications at scale.
Perks & Benefits:
- Competitive base salary
- Equity - every employee is a stakeholder in our enormous upside
- A tech-first company culture driven by entrepreneurial thinking and talent
- A great team working in unison towards the same mission
- Transparency is what our product is built on—and so is our culture
- Daily catered lunch and snacks
- Generous health insurance for employees and dependents
- Flexible work schedule and work-from-home options
- Flexible PTO
We are an equal opportunity employer and value diversity of all kinds at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
• BS/MS in Computer Science or equivalent from a premier institute Strong development, coding experience in one or more programming languages like OO Programming (Java), Functional/Scripting languages.
• Expertise in Data Structures, Algorithms, Concurrency.
• Expertise in Micro-services Architecture, multi-threading, performance-oriented programming and designing skills
• Strong software design/development experience in building massively large-scale distributed internet systems and products
• Experience of working on Big Data technologies and applications
• Expertise in one or more persistence technologies (Cassandra, Redis, ElasticSearch, RDBMS).
• 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 a fluid environment
• Provide good attention to details
• Must be excited by challenges surrounding the development of highly scalable & distributed system for building audience targeting capabilities
• Agility and ability to adapt quickly to changing requirements and scope and priorities
The Role:
We are looking for an enthusiastic Senior Python Developer, who adopts a hands-on approach and loves to build scalable, distributed and large web / mobile products. You would be responsible for designing the architecture, reviewing the code, building the technology and deploying web/mobile applications.
Responsibilities:
- Own the product development from scratch.
- Design and implementation of low-latency, high-availability, and performant applications.
- Contribute to discussion on software architecture while mentoring a team of developers.
- Participate in code reviews, design reviews, SCRUM ceremonies, and troubleshoot to ensure uptime for live systems etc.
Requirements:
- Bachelor's degree in a technology-related field from a premier college.
- Prior 3+ years of experience in back-end development (Python/ Golang) in a start-up or a dynamic work environment.
- Good exposure in writing and optimizing SQL for high-performance systems.
- Understanding of asyncio and eventloop/ uvloop concepts. Knowledge of frameworks such as Quart/ Fastapi/ Starlette is preferred.
- Knowledge of AWS; Caching technologies like Redis, Memcache; ELK; mySQL Databases, etc.
- Strong understanding of System Design, Microservice Architecture, Kafka, Pub/Sub, Message queues, and in-memory data stores etc.
- Customer oriented, responsive to changes, and able to multi-task in a fast-paced environment.
|
Roles and Responsibilities |
● Leads more than one projects end-to-end and collaborates across functions. Drives planning, estimation and execution. ● Manages stakeholder expectations and offers scalable, reliable, performant and easy to maintain solutions ● Consistently delivers complex, well backed and bug-free products in time ● Consistently takes well thought technical/design decisions ● Develops expertise in more than one area and shares knowledge with others. able to mentor/train in areas which are new to them. ● Drives people to solve engineering challenges ● Enjoys high respect of Tech and other cross functional teams ● Demonstrates effective communication with project team, management and internal/external clients as necessary. ● Surfaces both technical and non-technical team challenges and helps resolve them ● Champion for SDLC best practices and high quality standards ● Significantly contributes in hiring high performance candidates |
|
Experience &
Skills |
● Expert at in RoR, Golang, NodeJS or Python. Good to have exposure to ML. ● Must have experience in cloud computing ● Operates independently with almost no oversight ● Is able to apply domain expertise to think critically and make wise decisions for the team, taking into account tradeoffs and constraints. ● Communicates tech decisions through design docs and tech talks ● Has delivered multiple projects with end-to-end engineering ownership ● Keeps track of new technology/tools and embraces them as necessary ● 12+ years of experience in product driven organization ● A Bachelors or Masters degree in engineering from a reputed institute (preferably IITs, NITs, or other top engineering institutes) |
Requirements :
- Minimum 5 years of experience working on Python Environment
- Knowledge of software development methodologies and being able to work on projects individually or as part of a team. should be able to work with AGILE methodology.
- Knowledge of relational databases, version control tools and other development tools.
- Strong interest in learning new skills/technologies and curiosity to explore various technologies
- Should have strong analytical skills
- Good communication.
Must Required Skills:
- Python 3
- should have worked on one or more major Python web frameworks.
- Working knowledge in selenium.
- Worked with APIs development, integration of third-party APIs
- Working knowledge of MySQL databases integration with Python Environment.
- Should be a Backend Developer - Python only
- Should be MCA/B.Tech IT
- Should have Database Knowledge
- Should have DJango Knowledge
- Writing effective, scalable code
- Good Communication








