BackEnd Engineer

Role: Python Developer (Immediate Joiner)

Location: Gurugram, India (Onsite)

Experience: 4+ years

Company: Mizzle Cloud Pvt Ltd

Working Days: 6 Days( 5 days- WFO, Sat- WFH)

Job Summary

We are seeking a skilled Python Django Developer with expertise in building robust, scalable, and efficient web applications. Must have 3+ years of core work experience. The ideal candidate will have hands-on experience with RabbitMQ, Redis, Celery, and PostgreSQL to ensure seamless background task management, caching, and database performance.

Key Responsibilities

• Develop, maintain, and enhance Django-based web applications and APIs.
• Design and implement message broker solutions using RabbitMQ to manage asynchronous communication.
• Integrate Redis for caching and session storage to optimize performance.
• Implement and manage task queues using Celery for background processes.
• Work with PostgreSQL for database design, optimization, and query tuning.
• Collaborate with front-end developers, DevOps engineers, and stakeholders to deliver high-quality software solutions.
• Write clean, modular, and well-documented code following best practices and standards.
• Debug, troubleshoot, and resolve issues across the application stack.
• Participate in code reviews, system design discussions, and team meetings.
• Ensure scalability, reliability, and security of applications.

Technical Skills:

• Must have minimum 4+ years of relevant work experience.
• Strong proficiency in Python and Django framework.
• Experience with message brokers, particularly RabbitMQ.
• Familiarity with Redis for caching and session management.
• Hands-on experience with Celery for distributed task queues.
• Proficiency in PostgreSQL, including database design and optimization.
• Knowledge of RESTful API design and development.
• Understanding of Docker and containerized applications.

Preferred Skills:

• Experience with CI/CD pipelines.
• Familiarity with cloud platforms (AWS, GCP).
• Knowledge of Django ORM and its optimizations.
• Basic understanding of front-end technologies (HTML, CSS, JavaScript).

Soft Skills:

• Strong problem-solving skills and attention to detail.
• Excellent communication and teamwork abilities.
• Ability to work in an agile environment and adapt to changing requirements.

Educational Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related field.

Required Core Tech Stack:

We're looking for engineers with hands-on experience across most of the following technologies:

• Python Backend Development (3+ years)
• FastAPI (2+ years of production experience required)
• PostgreSQL
• MongoDB
• Redis
• Docker
• Celery or equivalent async task queues
• REST APIs & Microservices
• AWS/GCP
• GitLab CI/CD

The selected Sr. Backend engineer will ship the backbone that powers 4 million + learners in 64 countries—owning APIs that crunch 1 billion learning events & the AI that supports it with <200 ms latency.

What You'll Do:

At LearnTube, we’re pushing the boundaries to revolutionize how the world learns. As a Senior Backend Engineer, your roles and responsibilities will include:

• Shipping Micro-services – Build FastAPI services that handle ≈ 800 req/s today and will triple within a year (sub-200 ms p95).
• Power Real-Time Learning – Drive the quiz-scoring & AI-tutor engines that crunch millions of events daily.
• Design for Scale & Safety – Model data (Postgres, Mongo, Redis, SQS) and craft modular, secure back-end components from scratch.
• Deploy Globally – Roll out Dockerised services behind NGINX on AWS (EC2, S3, SQS) and GCP (GKE) via Kubernetes.
• Automate Releases – GitLab CI/CD + blue-green / canary = multiple safe prod deploys each week.
• Own Reliability – Instrument with Prometheus / Grafana, chase 99.9 % uptime, trim infra spend.
• Expose Gen-AI at Scale – Publish LLM inference & vector-search endpoints in partnership with the AI team.
• Ship Fast, Learn Fast – Work with founders, PMs, and designers in weekly ship rooms; take a feature from Figma to prod in < 2 weeks.

What makes you a great fit?

Must-Haves (Applicants without these skills are unlikely to move forward):

• 3+ yrs Python back-end experience (FastAPI)
• Strong with Docker & container orchestration
• Hands-on with GitLab CI/CD, AWS (EC2, S3, SQS) or GCP (GKE / Compute) in production
• SQL/NoSQL (Postgres, MongoDB) + You’ve built systems from scratch & have solid system-design fundamentals

Nice-to-Haves

• k8s at scale, Terraform,
• Experience with AI/ML inference services (LLMs, vector DBs)
• Observability: Prometheus, Grafana, OpenTelemetry

Why LearnTube?

• Build AI products at global scale – Your work will power learning experiences for 4M+ learners across 64 countries.
• Work directly with experienced founders – Collaborate closely with founders who are deeply involved in product and engineering decisions, giving you ownership and a direct impact on the product roadmap.
• Learn fast – Join a high-performing team where you'll own features end-to-end and solve challenging backend and distributed systems problems.
• Recognized AI startup – LearnTube is a Google Top 20 AI Startup and part of Google's AI First Startup Accelerator, with access to cutting-edge AI technology and mentorship.

Why Work With Us? 

At LearnTube, we believe in creating a work environment that’s as transformative as the products we build. Here’s why this role is an incredible opportunity:

• Cutting-Edge Technology: You’ll work on state-of-the-art generative AI applications, leveraging the latest advancements in LLMs, multimodal AI, and real-time systems.
• Autonomy and Ownership: Experience unparalleled flexibility and independence in a role where you’ll own high-impact projects from ideation to deployment.
• Rapid Growth: Accelerate your career by working on impactful projects that pack three years of learning and growth into one.
• Founder and Advisor Access: Collaborate directly with founders and industry experts, including the CTO of Inflection AI, to build transformative solutions.
• Team Culture: Join a close-knit team of high-performing engineers and innovators, where every voice matters, and Monday morning meetings are something to look forward to.
• Mission-Driven Impact: Be part of a company that’s redefining education for millions of learners and making AI accessible to everyone.

Job Description :-

• Have intermediate/advanced knowledge of Python.
• Hands-on experience with OOP in Python. Flask/Django framework, ORM with MySQL, MongoDB is a plus.
• Must have experience of writing shell scripts and configuration files. Should be proficient in bash.
• Should have excellent Linux administration capabilities.
• Working experience of SCM. Git is preferred.
• Should have knowledge of the basics of networking in Linux, and computer networks in general.
• Experience in engineering practices such as code refactoring, design patterns, design driven development, Continuous Integration.
• Understanding of Architecture of OpenStack/Kubernetes and good knowledge of standard client interfaces is a plus.
• Code contributed to OpenStack/Kubernetes community will be plus.
• Understanding of NFV and SDN domain will be plus.

Roles and Responsibilities

• Apply knowledge set to fetch data from multiple online sources, cleanse it and build APIs on top of it
• Develop a deep understanding of our vast data sources on the web and know exactly how, when, and which data to scrap, parse and store
• We're looking for people who will naturally take ownership of data products and who can bring a project all the way from a fast prototype to production.
• Integrating and maintaining Python services
• Developing robust microservices and applications

Desired Candidate Profile

• Strong relevant experience of at least 2-3 years.
• Strong coding experience in Python3.
• Should have good experience with Django and NodeJs.
• Proficient on modelling applications on both RDBMS and NOSQL databases
• Should have experience in web scraping
• Good understanding and hands-on with scheduling and managing tasks with cron
• Should have experience with microservice architecture
• Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement
• Should have experience in shell scripting, GIT and docker
• Writing unit tests for 100% code coverage.

• Experience of using Python/ Django frameworks in building back end for Full Stack Applications
• Hands on experience on Web frameworks, Restful APIs and SOAP
• Strong command on SQL (or relevant query language or ORM queries)
• Knowledge of front-end technologies such as React Native, React.js, Angular.js or Javascript

· 3+ years java development experience with JSE/JEE, Java based Micro-services framework and implementation, Spring framework, Hibernate framework, SQL etc

· Hands on experience on Spring boot & Microservices .

· Strong knowledge of micro-service logging, monitoring, debugging and testing

· Implementations experience of micro-service integration, packaging, build automation and deployment.

· Object Oriented analysis and design using common design patterns.

AnnexLogic System Pvt. Ltd. is a leading comprehensive business software product development services provider. We partner with both start-ups and established businesses globally in their idea-to-implementation journey. We are a team of professionals who believe in creating business value for our clients through in-depth research, analysis, formation and implementation. Our customers are spread across the globe including the US, Canada, Australia, UK, Europe and Asia-Pacific region.

We are always looking for opportunities to extend our team with new proficient and talented colleagues who love working in a start-up culture, and this time, we need a Senior Back-end Developer, with strong technical skills and relevant experience of at least 4 years.

You’re a motivated team player who takes initiative and pride in his work and contributes to an informal working environment. You will be confident in your ability to develop the product, taking into account the following:

● Excellent knowledge of NodeJS
● At least 3 years of working experience with backend technologies
● Knowledge of PHP is considered a plus
● Knowledge of Java or Kotlin is considered a plus
● You can learn quickly new technologies and adapt to new technical challenges
● Experience in working with a TDD approach
● You have a strong background in Linux-based development
● You have previous experience with container technologies such as Docker
● You have strong knowledge of microservice architecture
● You are passionate about writing clean, maintainable & testable code
● You have strong Agile/Scrum work ethic
● You are continuously researching tools, technologies, frameworks and practices.
● Projects with a high complexity interest you
● You are highly committed and responsible, independent and able to take an initiative
● You are always mindful of quality attributes like maintainability, performance, security, scalability, usability and testability.
● You carefully read the specifications and assignments and you like to take responsibility for your components from start to end
● You feel comfortable discussing and deepening technical and technical requirements with the PM
● You have multitasking capabilities, attention to detail and excellent analytical skills
● Excellent interpersonal and teamwork skills 1 Responsibilities:
● Work on multiple microservices - written in NodeJS (TS, JS), Spring (Kotlin), PHP (Symfony)
● Develop new microservices to accommodate the (many) new features and requirements of the project
● Refactor existing microservices or extract new ones to improve performance and scalability
● Come up with ideas to improve existing architecture - feedback and ideas are always welcome
● Monitor, trace and debug production microservices to ensure an application with 0 downtime
● Work to improve the CI / CD flow of the project Things we can guarantee:
● Competitive salary, with many other extra benefits (complex medical package, extra free days, events, gifts and others)
● Opportunity to work on a challenging project, using the latest technologies
● The perfect framework for professional development
● A young, creative and friendly team
● A flexible work schedule which makes you more productive
● We support any opportunities that are useful for you, including training and events