Backend Developer

Role Overview:

As a Backend Developer at LearnTube.ai, you will ship the backbone that powers 2.3 million learners in 64 countries—owning APIs that crunch 1 billion learning events & the AI that supports it with <200 ms latency.

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What You'll Do:

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

• Ship 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:

• 2+ 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)
• Go / Rust for high-perf services
• Observability: Prometheus, Grafana, OpenTelemetry

About Us: 

At LearnTube, we’re on a mission to make learning accessible, affordable, and engaging for millions of learners globally. Using Generative AI, we transform scattered internet content into dynamic, goal-driven courses with:

• AI-powered tutors that teach live, solve doubts in real time, and provide instant feedback.
• Seamless delivery through WhatsApp, mobile apps, and the web, with over 1.4 million learners across 64 countries.

Meet the Founders: 

LearnTube was founded by Shronit Ladhani and Gargi Ruparelia, who bring deep expertise in product development and ed-tech innovation. Shronit, a TEDx speaker, is an advocate for disrupting traditional learning, while Gargi’s focus on scalable AI solutions drives our mission to build an AI-first company that empowers learners to achieve career outcomes. We’re proud to be recognised by Google as a Top 20 AI Startup and are part of their 2024 Startups Accelerator: AI First Program, giving us access to cutting-edge technology, credits, and mentorship from industry leaders.

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.

Hands-on working knowledge and experience is required in:

a. JavaScript, Typescript, NodeJS (Express, NestJs, etc. )

b. Experience working in GCP or AWS or Azure

c. Experience working in Containers & Unix Platforms

d. Relational Databases (PostgreSQL, MySQL, SQL, etc. )

e. Agile Methodologies (Scrum, TDD, BDD, etc. )

f. Understanding of Microservices Architecture, Domain Driver Design, Test Driven Development and Secure Design patterns and architecture is a must

g. Data Structures and Algorithms using Javascript, Typescript and/or other Programing Languages

h. Strong organizational skills i. Agile Methodologies (Scrum, TDD, BDD, etc. )

Experience with several of the following tools/technologies is desirable:

a. GIT (Bit Bucket, Gitlab, etc. ), Jira, Gradle, Maven, Jenkins, SharePoint, Eclipse/IntelliJ.

b. Design Patterns and implementing the Design Patterns

c. Development of Complex Application and System Architectures

d. NoSQL Databases (Redis, Mongo, etc. ) e. Full stack development

f. Experience working with CI/CD pipelines with for example GitHub Actions.

Knowledge of the following technologies is a plus:

a. Other Programming Languages (Java, Python, etc. )

b. Continuous Integration and Continuous Delivery Tools like Jenkins, Git, etc

The tech stack looks like the below (expect this to change as we scale):

1. Typescript for APIs (REST and GraphQL)
2. Kafka, Spark, and data warehouses for ML pipelines (spark on python/scala)
3. Solidity + hardhat for smart contracts (in the future, rust, go and move)
4. AWS & Terraform
5. Full nodes

You can expect to do some or all of the following:

1. Read through protocols’ whitepapers and smart contracts to derive metrics and analyze risks
2. Architect the backend for APIs, async jobs, and blockchain integration
3. Build clean, concise APIs for customer integration, along with the documentation
4. Setup, run and maintain full and archive nodes across different chains
5. Integrate with multiple partners like exchanges and custody providers
6. Fool-proof security across the stack - encryption, hashing, privacy, VPC, etc.
7. Infrastructure as code - build terraform scripts and ensure easy replication of the infra across different regions
8. Research the top DeFi protocols to uncover better insights for our customers and evaluate their risk profiles, security, and historical returns
9. Manage production deployments, logging, and monitoring

We expect you to be fairly comfortable with working with both web3 and web2 stacks. We do not expect that you have web3 experience on day 1, but you should be willing to wear multiple hats, learn things quickly and move fast.

1. Generalist, a solid engineer who can learn things on your own and have an eye for clean, tested, and well-documented code
2. We don’t look at the number of years of work experience as a criterion, but rather see what you have done in your life so far (side projects, open-source contributions, blogs, etc.). We don’t care about degrees, the institutions you went to, or the companies you worked for before. We are open to talking as long as you have good judgment, great clarity, align with our values and have a strong track record of thoughtful work
3. Understand the fundamentals of building and integrating APIs and secure systems. Bonus if you know a bit about blockchains and protocols
4. You can be strong on the backend, front-end, or can dabble everywhere. We want you to play to your strengths and will provide enough opportunities to learn and do things outside of your comfort zone

Pay and benefits We offer a solid, competitive package (including early-stage equity) that is location agnostic. We give you the flexibility to choose the split between cash and equity.

Roles and Responsibilities

1. Ability to work on diverse backend stack such as Node JS, Java, Express JS
2. Ability to work on diverse frontend stack such as React JS, Angular 6/7/8/9, HTML5, CSS3
3. Ability to deliver quick POC’s using cutting edge technologies.
4. Preparing reports, manuals and other documentation on the status, operation and maintenance of software.
5. Design, develop, and unit test applications in accordance with established standards
6. Developing, refining, and tuning integrations between applications. Analysing and resolving technical and application problems.
7. Ability to debug application.
8. Should have complete knowledge on developing RESTful Services.
9. Should be able to also work in agile development methodology.

Competency Requirements

1. Experience in NodeJS, Java and development using AngularJS / ReactJS
2. Experience in front end frameworks such as Angular.js, React.js, Bootstrap, Foundation etc
3. Experience in client/server application development
4. Knowledge of agile development methodologies
5. Knowledge of unit testing theory
6. Knowledge of AWS cloud
7. Experience in Java, Python and Go will be added advantage

Position : Backend Developer – SDE3 : Java/Nodejs

As part of the engineering team, you would be expected to have deep technology expertise with a passion for building highly scalable products. This is a unique opportunity where you can impact the lives of people across 150+ countries!

Responsibilities

● Own architecture, design, development, and implementation of different modules/features of the services

● Design, develop, deploy and support web applications.

● Bring in industry best practices

● Discover opportunities for performance improvements

● Recommend ways to improve reliability, efficiency and code quality

● Focus on continuous delivery and reducing complexity

● Carry out code reviews and manage pull requests within the mobile application development team

● Build applications based on micro-services architecture

Requirements

● Overall 5+ years of experience in Backend development (Java or Nodejs).

● B.E/B.Tech in CS or equivalent streams from institute of repute (IITs, NITs, BITs, IIITs or equivalent)

● Strong object oriented design skills & knowledge of design patterns

● Experience in working with data platform & data lake pipeline building is preferred.

● Experience designing & developing distributed systems involving multiple web services, databases (both SQL and NoSQL), caches, queues, etc. taking into consideration scalability, availability, fault tolerance, consistency, etc. of the overall system

● Well-aware of and enforces development best practices: Unit Tests, Code Reviews, Integration Tests, CI/CD, Monitoring, Alerting, etc

Type: Individual contributor with good hands on proficiency. 

Must have

• Strong proficiency in at least one of  Java, Ruby, Python
• Exposure to databases: any of  PostgreSQL, MySQL, Apache Cassandra
• Any NoSQL database experience is a plus
• Exposure to AWS cloud infrastructure: EC2 or S3 
• Proficiency with Git
• MUST: Using REST to make API calls. 

Great to have: 

• Experience working with one or more middleware, enterprise bus, queueing frameworks
• Any of Memcached/Redis, Apache Kafka / RabbitMQ / PubSub+ / AmazonMQ

Soft skills:

• Appreciation for clean and well documented code

What will you do at Tradyl:

(Examples for illustration only)

• Build a shipping service module that is called by our website to query shipping rates from India to a destination country. Configure this to so that an Ops person can update shipping costs as and when they change. Own deployment and monitoring of this service. 
• Use Zapier to build a workflow to export a MixPanel report into a Google sheet every day.
• Change our supplier portal (built on bubble.io) to make an API call to our customer facing site, whenever a supplier modifies his profile.
• Write an alert mechanism that identifies catalogues with insufficient information and makes them non discoverable, which can run every day.
• Work with Business Team to design a workflow for product inwarding using Airtable. Write a small app within Airtable so that whenever a product is updated as “shipped” in airtable, it updates the customer facing website.
• Use an open source dashboarding framework to create a quick dashboard to track important business events. 

Job Description

Paytm is looking for hands-on technologists, who will be responsible for architecting &amp; designing new age mobile &amp; web 3.0 products at Paytm.

Key Responsibilities

 Incumbent will be architecting our futuristic mobile &amp; 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 &amp; 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 &amp; algorithm and problem solving skills.

 Experience and knowledge of open source tools &amp; 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.

We are looking for passionate engineers and researchers that want to contribute in this exciting and fast moving field of Deep Learning and Research.