Full Stack Developer (MERN Stack)

Company

Crypto made easy 🚀 

We are the bridge between your crypto world and everyday life; trade pairs, book flights and hotels, and purchase gift cards with your favourite currencies. All in one best-in-class digital experience. It's not rocket science.

🔗Apply link at the bottom of this post — don’t miss it!

Why Join?

By joining CryptoXpress, you'll be at the cutting edge of merging digital currency with real-world services and products. We offer a stimulating work environment where innovation and creativity are highly valued. This remote role provides the flexibility to work from any location, promoting a healthy work-life balance. We are dedicated to fostering growth and learning, offering ample opportunities for professional development in the rapidly expanding fields of AI, blockchain technology, cryptocurrency, digital marketing and e-commerce.

Role Description:

We are looking for a passionate and curious Junior Web3 Developer for a full-time remote position at CryptoXpress. This is an ideal opportunity for a developer who wants to grow their blockchain development skills by contributing to real-world crypto products used daily for trading, travel, and digital commerce.

You will work on integrating wallets, handling Web3 transaction flows, and supporting blockchain-based features in a mobile-first product that prioritizes seamless UX and performance.

Key Responsibilities:

• Support the implementation of Web3 features within the CryptoXpress app (e.g., wallet connections, transaction confirmations, crypto payments).
• Integrate with libraries such as Web3.js, Ethers.js, or WalletConnect to enable secure and smooth blockchain interactions.
• Assist in building user-facing features that depend on blockchain functionality.
• Help debug and resolve issues related to wallet connectivity, transaction reliability, or Web3 provider integration.
• Collaborate with frontend, backend, and blockchain engineers to build end-to-end flows.
• Stay current with emerging tools, updates, and standards across major EVM-compatible blockchains.

Qualifications:

• Familiarity with Web3 development using JavaScript or TypeScript.
• Hands-on experience with libraries like Web3.js, Ethers.js, or similar frameworks.
• Understanding of wallet integration concepts (e.g., MetaMask, WalletConnect).
• Solid foundation in React or React Native is a plus.
• Knowledge of Ethereum, tokens (ERC-20, ERC-721), and gas mechanics.
• Eagerness to learn and apply new technologies in a real-world app.
• Basic understanding of how crypto exchanges and wallets operate.
• Bachelor’s degree in Computer Science, Engineering, or relevant field (preferred but not mandatory).

How to Apply:

Interested candidates must complete the application form at 

https://forms.gle/DXFsygindiCjKAqY6

Join us and become a driving force behind CryptoXpress’s content strategy, helping to shape the conversation in the cryptocurrency space! 🚀

💡Pro Tip: Tips for Application Success

• 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
• Explore CryptoXpress before applying — take 2 minutes to download and try the app so you understand what we’re building

Company Description

We are an SF-based stealth mode AI startup, building AI agents and automation tools for Marketing use-cases. We are ex-Big Tech, currently bootstrapped and working with a few design partners/early customers. We will be starting a fundraise in Q3 2024.

Role Description

This is a part-time remote role for a Founding Engineer (first engineering hire). This is an equity-only role, meaning compensation will be in the form of equity rather than a salary.

This role will be 30% applied research and 70% product engineering. The expectation is that you will be able to commit 15 hours per week for this role to begin with.

You will -

• Experiment with the latest AI technologies and research and put them into implementation.
• Have the freedom and responsibility to design and own projects from start to finish.
• Have opportunities to directly talk with customers and solve their problems!

About you

• Love to keep up with and dive into latest technologies in AI
• Move fast, ship quickly, has high urgency
• Energized about going from 0 to 1
• Enjoy high ownership and responsibility
• Familiar with no-code tools and frameworks
• Excited about working on AI-native user experiences

Requirements

• Bachelor’s or higher degree in Computer Science or a related field (Also open to university students for the right candidate)
• Knowledge of gen-AI systems (LLMs, model training/fine-tuning, agent frameworks, evaluation frameworks, vector DBs, RAG, etc)
• Experience in building and scaling backend systems and infrastructure
• Strong generalist, skilled with Python, cloud infrastructure (AWS).

What we offer

• Technical Ownership: You will own high level (and lower level) technical decisions for an early-stage startup, with mentorship from seasoned Engineering leaders from Silicon Valley.
• Equity: As a key initial hire, you will receive significant founding equity and ownership in the company.
• Growth: You will have a natural on-ramp to come onboard as a full-time, salaried Founding Engineer after a fundraise event.

• Design and build applications/systems based on wireframes and product requirements documents
• Work on back-end & front-end development of core scripts using NodeJS/ MongoDB/React.js/Angular/Express /Redux.
• Unit test code for robustness, including edge cases, usability and general reliability
• Write reusable, easy to maintain, versioned code using DRY principles
• Integrate existing tools and business systems (in-house tools)
• Good exposure in creating dynamic web pages
• Familiarity with Server-Oriented Architecture and RESTful Web Services
• Mentor junior team members on system architecture, coding styles and inculcate an attitude of continuous improvement in the team members

• Experience in leading a software team and managing software delivery project.
• Strong experience in Python development in a full stack environment is a requirement, including , Flask
• Strong Hands-on with VueJS/Vuex, JavaScript, React, Angular · Experience with SQLAchemy or similar ORM frameworks
• Experience working with mapping APIs (e.g., Google Maps, Mapbox) · Experience using Elasticsearch and docker environment is a plus
• Strong knowledge of SQL, comfortable working with MySQL and/or PostgreSQL databases
• Understands concepts of Data Modeling
• Experience with REST.
• Experience with Git, GitFlow, code review process
• Good understand with basic UI and UX principles
• Must enjoy problem solving and have excellent communication skills

• Thorough understanding of React Native and its core principles- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Experience in React Js, Javascript, Ruby on Rails (preferred)- Experience with popular React workflows (such as Flux or Redux)
• Familiarity with newer specifications of ECMAScript (ES6 & ES5 )- Knowledge of isomorphic React is a plus
• Familiarity with RESTful APIs- Experience with relational databases (PostgreSQL preferred)
• Working knowledge of git for version control- Understanding of Unix tools
• A user-centric mentality for building products

Roles and responsibilities:

•  Proficient in SQL, NoSQL, relational database design and methods for efficiently retrieving data 
•  Experience building complex and non-interactive systems batch, distributed, etc.
•  Be responsible for the technical design and experience in guiding/mentoring others.
•  Strong OOPS knowledge, including experience with design patterns
•  Experience with relational databases like MySQL/Oracle
•  Experience with enterprise application servers like Tomcat/Weblogic/Websphere.
•  Exposure to Web Services SOAP and RESTFUL
•  Exposure to Agile/Scrum, TDD, and Continuous Integration tools like Jenkins, Bamboo etc.
•  Excellent analytical aptitude and problem solving skills.
•  Excellent communication and customer interfacing skill

• Bachelor’s degree in Computer Science, Software Engineering, or a related discipline
• 4+ years experience working in an IT environment
• 4+ years of Object-oriented design, functional programming
• Node JS API Development (Firebase API development is a plus)
• Angular or VUE or React JS Front end Development (VUE Js Experience is a plus)
• HTML / CSS responsive development
• Experience using any database
• Experience developing in an Agile / SCRUM Environment
• Experience developing mission-critical applications
• Strong business and technical acumen
• Excellent verbal and written communication skill

• Very strong in HTML & mobile techniques;
• Strong knowledge of Codeigniter / Laravel;
• Front-end skills HTML, CSS, CSS3, CSS3 animations, JavaScript,bootstrap;
• Experience with Angular or React;
• Popular JavaScript libraries/frameworks e.g. jQuery, LESS / Sass;
• Back-end skills PHP, MySQL or equivalent language such as C#, java, etc.;
• Strong knowledge of source control e.g. Bitbucket, Github;
• Experience with deployment and configuration of common stacks (LAMP, MERN, MEAN)
• Ability to work with design files for web development needs;
• In-depth experience with MongoDB & MySQL, including SQL & PL/SQL, or NoSQL query building
• Knowledge of tools & frameworks such as Gulp, Grunt, Node, Composer, etc.
• Ability to work with APIs;
• Experience working with CMS systems e.g. Magento, Wordpress;
• Good knowledge of web hosting environments e.g. cPanel, AWS, Google;
• Python skills are a plus