You will get Modern Full-Stack Web Apps with React, Node.js & MongoDB
Rising Talent
Project details
Hello startups and digital product builders!
I contributed as a Senior Backend Engineer to Custodiy, a modular MERN stack platform designed to support businesses, entrepreneurs, and organizations. I developed scalable backend services using Node.js, Express.js, and MongoDB, enabling features such as marketplace creation, secure OTC transactions, fundraising tools, and encrypted document management. The frontend was built with React, while blockchain functionality was integrated using Web3.js and Solidity on Binance Smart Chain. The result: a secure, flexible platform for powering modern digital ventures.
Key Responsibilities & Contributions:
• Full backend development using Node.js, Express.js, and MongoDB
• Smart contract and blockchain integration (Web3.js & Solidity)
• React-based frontend support for dynamic user experiences
• REST API architecture for modular business functions
• Secure systems for document handling and transactions
Why choose me?
• Deep experience with the MERN stack and blockchain technologies
• Proven ability to build secure, scalable business platforms
• Clean code practices and strong architectural planning
• Reliable communication
I contributed as a Senior Backend Engineer to Custodiy, a modular MERN stack platform designed to support businesses, entrepreneurs, and organizations. I developed scalable backend services using Node.js, Express.js, and MongoDB, enabling features such as marketplace creation, secure OTC transactions, fundraising tools, and encrypted document management. The frontend was built with React, while blockchain functionality was integrated using Web3.js and Solidity on Binance Smart Chain. The result: a secure, flexible platform for powering modern digital ventures.
Key Responsibilities & Contributions:
• Full backend development using Node.js, Express.js, and MongoDB
• Smart contract and blockchain integration (Web3.js & Solidity)
• React-based frontend support for dynamic user experiences
• REST API architecture for modular business functions
• Secure systems for document handling and transactions
Why choose me?
• Deep experience with the MERN stack and blockchain technologies
• Proven ability to build secure, scalable business platforms
• Clean code practices and strong architectural planning
• Reliable communication
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$300
|
Advanced
$600
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 2 | 2 | 2 |
Number of Pages | 3 | 6 | 10 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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AH
Alex H.
Jun 2, 2025
Developer Wanted To Join Our Back-End Team
AL
Austin L.
May 8, 2025
Need Senior Full-Stack Developer to Fix a Feature and Optimize Backend (Next.js + PostgreSQL)
Azeem did an exceptional job — he not only fixed the unreliable save/load functionality in my app, but also quickly identified and resolved performance issues I didn’t even know existed. His debugging skills are top-tier, he worked fast, communicated clearly throughout, and delivered clean, well-documented code. Highly recommended if you need a full-stack expert who genuinely cares about quality, speed, and performance.
About Azeem
Senior Elixir & Phoenix Engineer | AI, RAG & LangGraph Specialist
100%
Job Success
Lahore, Pakistan - 8:58 am local time
My core expertise includes:
Elixir, Phoenix, Phoenix LiveView, LLMs, RAG, AI Agents, LangChain, LangGraph, OpenAI, Claude, Gemini, PostgreSQL, Redis, and AWS.
⚡ 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃
⤞ Elixir & Phoenix applications
⤞ Phoenix LiveView & real-time systems
⤞ AI Agents & multi-agent systems
⤞ LLM applications & AI integrations
⤞ RAG pipelines & AI knowledge bases
⤞ LangChain & LangGraph workflows
⤞ REST & GraphQL APIs
⤞ SaaS & scalable backend systems
⤞ Microservices & distributed systems
🚀 𝐒𝐄𝐋𝐄𝐂𝐓𝐄𝐃 𝐖𝐎𝐑𝐊
→ 𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐋𝐞𝐠𝐚𝐥 𝐀𝐈: Agent Router connecting specialized AI agents using LangGraph, Gemini & pgvector.
→ 𝐋𝐞𝐠𝐚𝐥 𝐑𝐀𝐆 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞: Clause-aware retrieval with source citations for better accuracy and traceability.
→ 𝐀𝐮𝐭𝐨𝐧𝐨𝐦𝐨𝐮𝐬 𝐀𝐠𝐞𝐧𝐭 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦: AI agents with tool-use budgets, spending limits, automatic termination & action logging.
→ 𝐑𝐞𝐚𝐥-𝐓𝐢𝐦𝐞 𝐍𝐅𝐓 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦: Phoenix Channels supporting thousands of concurrent viewers with Ethereum event synchronization.
→ 𝐅𝐢𝐧𝐭𝐞𝐜𝐡 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦: Real-time portfolios, transaction ledger, role-based access & Stripe billing.
🧠 𝐀𝐈 & 𝐋𝐋𝐌 𝐒𝐓𝐀𝐂𝐊
RAG • AI Agents • Agentic AI • LLM Development • LangChain • LangGraph • OpenAI • Anthropic Claude • Google Gemini • pgvector • Pinecone • Vector Search • Multi-Agent Systems
⚙️ 𝐁𝐀𝐂𝐊-𝐄𝐍𝐃 & 𝐈𝐍𝐅𝐑𝐀𝐒𝐓𝐑𝐔𝐂𝐓𝐔𝐑𝐄
Elixir • Phoenix • Phoenix LiveView • Erlang/OTP • PostgreSQL • Redis • Node.js • TypeScript • Python • REST • GraphQL • WebSockets • Docker • Kubernetes • AWS • CI/CD
🎯 𝙒𝙃𝙔 𝘾𝙇𝙄𝙀𝙉𝙏𝙎 𝙒𝙊𝙍𝙆 𝙒𝙄𝙏𝙃 𝙈𝙀
I can take a project from requirements → 𝙖𝙧𝙘𝙝𝙞𝙩𝙚𝙘𝙩𝙪𝙧𝙚 → 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 → 𝙩𝙚𝙨𝙩𝙞𝙣𝙜 → 𝙙𝙚𝙥𝙡𝙤𝙮𝙢𝙚𝙣𝙩 without losing sight of the business goal.
If you have a 𝙧𝙤𝙪𝙜𝙝 𝙞𝙙𝙚𝙖, 𝙚𝙭𝙞𝙨𝙩𝙞𝙣𝙜 𝙥𝙧𝙤𝙙𝙪𝙘𝙩, 𝙤𝙧 𝙩𝙚𝙘𝙝𝙣𝙞𝙘𝙖𝙡 𝙘𝙝𝙖𝙡𝙡𝙚𝙣𝙜𝙚, send it over.
Let’s build something that works beyond the demo.
𝗞𝗘𝗬𝗪𝗢𝗥𝗗𝗦: Elixir, Phoenix Framework, Phoenix LiveView, Erlang, OTP, BEAM VM, Backend Development, Backend Engineer, API Development, REST API, GraphQL, Ecto, Phoenix Channels, GenServer, Oban, Distributed Systems, Concurrent Programming, High Performance Applications, High Availability Systems, Event-Driven Architecture, Microservices, SaaS Development, Scalable Web Applications, Custom Software Development, Enterprise Software Development, PostgreSQL, Redis, Elasticsearch, Docker, Kubernetes, AWS, Google Cloud Platform (GCP), CI/CD, GitHub Actions, Linux, Nginx, WebSockets, JWT Authentication, OAuth, API Integration, Stripe Integration, Twilio API, Artificial Intelligence, AI Development, Generative AI, OpenAI API, ChatGPT API, GPT-5, Claude AI, Gemini AI, LLM Development, Large Language Models, AI Agents, Agentic AI, AI Automation, AI Workflow Automation, AI Chatbot Development, AI Assistant Development, AI Integration, MCP (Model Context Protocol), Prompt Engineering, Function Calling, Retrieval-Augmented Generation (RAG), RAG Development, LangChain, Python, FastAPI, Django, Flask, Automation, Workflow Automation, Business Process Automation, CRM Automation, Email Automation, n8n, JavaScript, TypeScript, Node.js, React.js, Next.js, Full Stack Development
Steps for completing your project
After purchasing the project, send requirements so Azeem can start the project.
Delivery time starts when Azeem receives requirements from you.
Azeem works on your project following the steps below.
Revisions may occur after the delivery date.
Project Development
I start working on the project, keeping you updated on the progress. I ensure all your requirements are being met as we move forward.
Client Reviews & Provides Feedback
Once the initial work is complete, you review the progress and provide any feedback or changes.