Backend Developer

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.

Roles and Responsibilities:

• Own development, design, scaling, and maintenance of application and messaging engines that power the central platform of Capillary's Cloud CRM product.

• Work on the development of AI and data science products for various use cases. Implement PoCs in Python, and Spark-Scala and productize the implementations.

• Contribute to overall design and roadmap.

• Mentor Junior team members.

Required Skills:

• Innovative and self-motivated with a passion to develop complex and scalable applications.

• 3+years of experience in software development with a strong focus on algorithms and data structures.

• Strong coding and design skills with prior experience in developing scalable & high-availability applications. Expertise in using Core Java/J2EE or Node.js

• Work experience with Relational databases and Non-Relational is required (Primarily MySQL, MongoDB, and Redis)

• Familiarity with big data platforms (like Spark-Scala) is an added plus.

• Strong Analytical and Problem Solving Skills.

• BTech from IIT or BE in computer science from a top REC/NIT.

Job Perks

• Competitive Salary as per market standards

• Flexible working hours

• Chance to work with a world class engineering team.

Why Join Us:

Be part of a fast-moving tech team building impactful, user-friendly apps with modern development practices and a collaborative work culture.

Capillary is an Equal Opportunity Employer and will not discriminate against any applicant for employment on the basis of race, age, religion, sex, veterans, individuals with disabilities, sexual orientation, or gender identity.

Disclaimer:

It has been brought to our attention that there have recently been instances of fraudulent job offers, purporting to be from Capillary Technologies. The individuals or organizations sending these false employment offers may pose as a Capillary Technologies recruiter or representative and request personal information, purchasing of equipment or funds to further the recruitment process or offer paid training. Be advised that Capillary Technologies does not extend unsolicited employment offers. Furthermore, Capillary Technologies does not charge prospective employees with fees or make requests for funding as a part of the recruitment process.

We commit to an inclusive recruitment process and equality of opportunity for all our job applicants.

Job description

Develops MDM data model and architecture

Configure MDM tools to perform MDM design as required

3+ years of experience in Pimcore

5+ years of experience in PHP/MySQL

3+ years of experience in MVC (Model-View-Controller) framework

4+ years of experience in Symfony 4.x.

Experience in front-end technologies like HTML, CSS, and Ajax.

Strong experience in design, implementation, and optimization of RDBMS databases,

especially MySQL/ MariaDB.

In-depth knowledge of MySQL Database.

Data analysis, data standardization, and data cleanup

Command over Object-Oriented PHP programming

Experience with RESTful services

Experience with DevOps (CICD, etc.).

Experience with Git.

It is a platform for creators, influencers and celebrities to grow, manage and monetise their community. It is aimed at both established and aspiring online creators who want to pursue their passion. Our vision is to enable anyone and everyone to make a successful living doing what they enjoy.

Skills And Qualification:-

• Must have experience with any scripting language (JavaScript/NodeJS preferred)
• Experience with API-driven and highly scalable application is a plus
• Good knowledge of non-relational DB (MongoDB preferred)
• Good with data structures and algorithms
• Good to have an experience with testing framework and CI/CD pipeline
• 1+ years of experience in software development preferably B2C experience.
• Basic understanding of Frontend and client side frameworks like React, Angular, Vue will be plus
• Experience in building scalable Restful APIs & Services.

Education requirement:-

• B.Tech (computer science preferred)

Responsibilities:-

• Clarify feature requirements with product team

• Design end to end feature flow

• Write scalable and bug free code

• Take care of test and deployment pipeline

• Maintaining the existing products

• You have an overall software development experience of 4 to 10 years
• 3+ years proficiency in Java and Spring boot
• Familiar with distributed computing and frameworks such as gRPC/ protobuf
• Understands JVM metrics, Garbage collection and performance tuning
• Experience in creating high-level design(HLD) and low-level design(LLD)
• You have a good understanding of relational database, NoSQL technologies, and REST
• Good to have experience in HTML, JavaScript, GraphQL, TypeScript, ReactJS and related toolsets
• Exposure to AWS stack/cloud computing
• Self-motivated developer who takes ownership of work
• Bachelor’s degree in Computer Science or Computing related discipline
• Experience in Product Development Environment is a plus.

We're looking for someone to join a team dedicated to building performant APIs and backend services that deal with large volumes of data for the company's flagship, global consumer product. Small, high-impact teams require conscious planning and decision-making when it comes to design, architecture, and product features. So, it's essential that you enjoy working in such an environment.

We're a team that cares about simplicity and being able to build reliable, deterministic systems and platforms. Hence, our choice of tooling is usually battle-tested reliable software with a robust test suite.

How we work

1. You won't deal with the hustle culture. We're focused on building well-thought-out, stable and reliable software and we try our best to ensure everyone understands the big picture and the immediate goals.
2. We work a solid 6-8 hour days and don't slave away 24/7.
3. We're a remote engineering team. This makes effective communication extremely important. Our teams have benefitted greatly from good written communication. This includes everything from the product specification to the API spec. We spend a lot of time writing READMEs. As a result our engineers work with greater clarity and planning.
4. We deploy several times a day and rely on a good test suite to ensure we're not making life hard for our colleagues.
5. We don't expect anyone to know everything, but we are curious and learn along the way.
6. We learn about the fitness space and what it means to really be fit and not just Instagram fit.

The Python Backend Engineer position may be a good fit for you if:

1. You have 3 (or more) years of experience building and maintaining cloud applications.
2. You have built APIs with Python, Flask, Django or FastAPI before.
3. You have experience working with relational databases like PostgresSQL or MySQL and have spent time writing SQL queries for large datasets.
4. Experience in writing Unit tests with pytest.
5. You have worked with Docker, docker-compose.
6. Familiarity with the AWS ECS stack.

We want you to care about

1. Good object oriented design
2. Performant APIs
3. Analysing why queries are slow and how to go about improving them.
4. Understanding DNS, Load balancing, Caching and Hashing.
5. Customer data and privacy.

Our API Stack services use:

1. Python 3.8+, Typescript
2. FastAPI, Flask, HapiJs
3. PostgresSQL, MySQL
4. Redis
5. Celery
6. Pytest, Jest for unit testing.
7. Gitlab CI/CD
8. Amazon ECS container services

Senior Developer

NOTE- we are looking for those who can join immediately or within 15-20 days of notice period.
Senior Dev with 5 years relevant experience

1. Working experience on web development using Python/Django
2. Comfortable with using Django framework.
3. Understanding of web servers
4. Knowledge in PostgreSQL, MySQL, and other database queries
5. Experience in using Redis cache.
6. Understanding of web technologies
7. Experience in REST API development using Django.
8. Strong hold on Apache
9. Integration of data storage solutions
10. Able to integrate multiple data sources and databases into one system
11. Understanding of JavaScript, and front-end JS frameworks like VueJS, React JS and Angular JS
12. Good communication skill
13. .net/.NET core will be an added advantage