Need Senior Back-End Engineer

Cryptocurrency & Blockchain, Javascript and Typescript — incorrectly specified categories?

3000 USD

Responsibilities

Design, develop, and optimize the architecture of core back-end systems, ensuring high concurrency, stability, and scalability.
Participate in Web3 feature development, including on-chain contract interactions, blockchain data storage, and retrieval.
Write, deploy, and maintain Solidity smart contracts, implementing business logic on Tron and other blockchain networks.
Collaborate closely with the front-end team to design and integrate APIs.
Handle casino-related API integrations, data processing, and security measures.
Develop and optimize systems for futures trading and cryptocurrency exchanges, ensuring security and operational stability.
Write high-quality, maintainable, and scalable code, and maintain related technical documentation.

Requirements

Proficient in Node.js, Go, or PHP, with a solid back-end development foundation.
Strong expertise in Web3 development, proficient in Solidity smart contract programming and optimization, with in-depth knowledge of Tron chain development.
Experience in Web3 wallet development is a plus.
Prior experience integrating casino APIs or developing gaming/betting systems is preferred.
Experience in futures trading or cryptocurrency exchange development is preferred.
Familiar with designing and optimizing systems for high concurrency and large-scale data, with knowledge of security best practices.
Strong sense of code quality, teamwork, and responsibility.

Nice-to-Haves

Open-source contributions or a portfolio of relevant work.
Familiarity with other major blockchains (Ethereum, BSC, Polygon, etc.) and cross-chain technologies.
Experience with DevOps, CI/CD, and containerized deployment.

Proposals 9 Withdrawn 1 Rejected 1 Discussions 1

Viktor Kozub

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Rating 122

Budget: 2900 USD Deadline: 30 days

Hi, I am Blockchain Engineer with 10+ years of experience with a lot of technical expertise. I have an excellent experience. Let’s discuss the details?

Danylo Kholodnyi

24 0

Budget: 3000 USD Deadline: 7 days

Hello! I have the necessary stack and am ready to get to work, we can discuss the details in private messages.

Oleksandr Litvinenko

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Rating 217

Budget: 3000 USD Deadline: 14 days

Good day. You have an interesting task. I have extensive experience in writing the backend part using Nodejs + MongoDB. I am adding examples of projects that have a backend part: Here is an example of a car rental and booking site with registration, login, and interactive logic: https://track-rental-auth-react-ts.vercel.app/ or this one (with backend): https://water-tracker.online/; As I mentioned separately in my review, I also write FRONTEND (but that requires separate time and payment). Message me privately and we will agree on everything.

Gayane M.

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Rating 162

Budget: 3000 USD Deadline: 31 days

Hello.
I am interested in your project. I am confident that I can deliver effective and high-quality work that meets your requirements and expectations. I have over 8 years of experience.

Nikita Chaus

13 0

Budget: 3000 USD Deadline: 11 days

Hello!

I specialize in creating and supporting complex frontend projects with a focus on pixel-perfect layouts based on Figma, modular architecture, and high performance. Experience with Next.js, Tailwind CSS, Canvas, complex animations, and UI systems.

I can develop interactive graphics and visualizations from scratch, optimizing them for any devices. I am used to working closely with designers and backend developers to bring projects to perfection.

I am ready to apply my experience to make your product look and perform at the level of top solutions.
git: https://github.com/onyx144