Backend Developer-Python (AWS Services &ETL)-Mumbai

About the CryptoXpress Partner Program

Earn lifetime income just by liking posts, posting memes, art, simple threads, engaging on Twitter, Quora, Reddit, or Instagram, referral signups, commission from transactions like flight, hotel, trade, gift card etc., 

(Apply link at the bottom)

More Details:

• Student Partner Program - https://cryptoxpress.com/student-partner-program
• Ambassador Program - https://cryptoxpressambassadors.com

CryptoXpress has built two powerful tracks to help students gain experience, earn income, and launch real careers:

🌱 Growth Partner: Bring in new users, grow the network, and earn lifetime income from your referrals' transactions like trades, investments, flight/hotel/gift card purchases.

🎯 CX Ambassador: Complete creative tasks, support the brand, and get paid by liking posts, creating simple threads, memes, art, sharing your experience, and engaging on Twitter, Quora, Reddit, or Instagram.

Participants will be rewarded with payments, internship certificates, mentorship, certified Web3 learning and career opportunities. 

About the Role

CryptoXpress is looking for a skilled Backend Engineer to build the core logic powering our Partner Program reward engines, task pipelines, and content validation systems. Your work will directly impact how we scale fair, fast, and fraud-proof systems for global Student Partners and CX Ambassadors.

Key Responsibilities

• Design APIs to handle submission, review, and payout logic
• Develop XP, karma, and level-up algorithms with fraud resistance
• Create content verification checkpoints (e.g., metadata checks, submission throttles)
• Handle rate limits, caching, retries, and fallback for reward processing
• Collaborate with AI and frontend engineers for seamless data flow
• debug reward or submission logic
• fix issues in task flows or XP systems
• patch verification bugs or payout edge cases
• optimize performance and API stability

Skills & Qualifications

• Proficient in Node.js, Python (Flask/FastAPI), or Go
• Solid understanding of PostgreSQL, Firebase, or equivalent databases
• Strong grasp of authentication, role-based permissions, and API security
• Bonus: Experience with reward engines, affiliate logic, or task-based platforms
• Bonus: Familiarity with moderation tooling or content scoring

Join us and play a key role in driving the growth of CryptoXpress in the cryptocurrency space!

Pro Tip: Tips for Application Success

• Please fill out the application below
• Explore CryptoXpress before applying, take 2 minutes to download and try the app so you understand what we're building
• Show your enthusiasm for crypto, travel, and digital innovation
• Mention any self-learning initiatives or personal crypto experiments
• Be honest about what you don't know - we value growth mindsets

How to Apply:

Interested candidates must complete the application form at 

https://forms.gle/CCaAvS6yLE92XAzU6

Based on experience, developers will be involved in building different elements of an online music app. Urgent requirement, immediate hiring will be done.

Key Responsibilities:

• Design, develop,  implement and evolve our backend platform (whose APIs and functionality provided are used by other game services, apps, and admin back office)
• Develop highly efficient, robust, quality code for applications and services
• Maintain clean coding practices
• Enhancing and supporting existing functions, some of which are 24/7
• Supporting product owners as required
• Providing support to the testing team during testing phases of the projects
• Contributing to solution proposals as required
• Creating work effort estimates as required
• Mentor, train on the best practices junior software associates and other team members.

• Clean coding practices
• Knowledge of scalable web architectures is required
• A solid understanding of Linux, JVM is required
• Knowledge of DevOps, Docker, Build Pipelines is good to have
• Knowledge of git workflow is essential
• Working with SOA, Microservices.

Any specific knowledge / experience:

• Functional programming experience with immubtable datastructures is required
• Knowledge of Erlang / Elixir is a plus.
• Knowledge of Clojure is perfect

What you need to have:

Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.

As a senior software engineer, you will work on our python based ORM and applications that scales to handle millions of transactions every hour. This is mission critical software and your primary focus will be building robust and scalable solutions that are easy to maintain.

In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product are important.

What You’ll Do:

• Own definition and implementation of API interfaces (REST and GraphQL). We take pride in our 100% open API with over 600 endpoints.
• Implement simple solutions to complex business logic that enables our merchants to manage financials, orders and shipments across millions of transactions.
• Build reusable components and packages for future use.
• Translate specs and user stories into reviewable, test covered patches.
• Peer review code and refactor existing code.
• Integrate with our eCommerce partners (Shopify, BigCommerce, Amazon), shipping partners (UPS, USPS, FedEx, DHL) and EDI.
• Manage Kubernetes and Docker based global deployment of our infrastructure.

Requirements We’re Looking for Someone With:

• Experience working with ORMs like SQLAlchemy or Django (2-3 years)
• Experience with SQL and databases (Postgres preferred)
• Experience in developing large server side applications and microservices
• Ability to create high quality code
• Experience with python testing tools (pytest) and test automation
• Familiarity with code versioning tools like GIT
• Strong sense of ownership and leadership quality
• Experienced in the tools of our web stack- Python, Celery, Postgres, Redis, RabbitMQ

Nice to Haves:

• Prior experience at a growth stage Internet/Software company
• Experience with ReactJS, Google Cloud, Heroku
• Cloud deployment and scaling experience

Hands -on experience with the following technologies is needed:

1. Good Knowledge of Python & Django Framework.
2. Experience in Git or any Version control systems.
3. Experience in SQL Databases like MySQL and PostgreSQL.
4. Knowledge of NoSQL Databases like Mongodb.
5. Worked on Django based live projects.
6. To implement microservices using Django rest framework.
7. Handling various technical aspects like coding of modules using the given design specifications
8. Debugging and fixing the defects as well as analyzing its root cause.
9. Deployment(AWS) and monitoring of the live project.
10. Mentoring junior developers.

Knowledge/Experience of AWS will be a big plus

Preferred Qualifications: 
B-Tech-IT/B-Tech -CSE/BCA or any degree in the relevant field

Required Experience: 
3 – 6 Years