FullStack JavaScript Developer - Mumbai

Job Title : Full Stack Developer (Crypto Exchange)

Experience : 4+ Years

Location : Gurugram & Vadodara (On-site)

Role Overview :

We are looking for a Full Stack Developer with strong expertise in both backend and frontend development, along with exposure to crypto exchange systems or fintech platforms.

In this role, you will work on building high-performance, real-time trading applications, contributing to core systems like order execution, pricing engines, and wallet integrations.

Key Responsibilities :

• Design, develop, and maintain scalable backend services and APIs.
• Build and optimize responsive frontend applications for trading interfaces.
• Work on real-time systems such as order books, pricing engines, and trade execution.
• Integrate with blockchain networks, wallets, and third-party APIs.
• Ensure platform security, performance, and reliability.
• Collaborate with product, design, and DevOps teams for end-to-end delivery.
• Participate in system design, architecture discussions, and code reviews.

Required Skills & Qualifications :

• 4+ years of experience in Full Stack Development.
• Strong expertise in :
• Backend : Node.js and/or Python
• Frontend : React.js and/or Next.js
• Experience with REST APIs and microservices architecture.
• Strong understanding of databases (MongoDB, PostgreSQL, MySQL, etc.).
• Hands-on experience with Docker and cloud platforms (AWS preferred).
• Solid understanding of system design, scalability, and performance optimization.

Preferred (Good to Have) :

• Experience working with a crypto exchange or trading platform.
• Understanding of blockchain fundamentals (Ethereum, Bitcoin, etc.).
• Experience with wallet integrations and on-chain transactions.
• Familiarity with WebSockets and real-time data streaming.
• Knowledge of security best practices in fintech/crypto systems.

Why Join Us ?

• Opportunity to work on a high-impact, real-world crypto exchange.
• Build and scale systems from early-stage to production.
• Work in a fast-paced, ownership-driven environment.
• Exposure to cutting-edge blockchain and trading technologies.

Competitive Salary

About Solidatus

At Solidatus, we empower organizations to connect and visualize their data relationships, making it easier to identify, access, and understand their data. Our metadata management technology helps businesses establish a sustainable data foundation, ensuring they meet regulatory requirements, drive digital transformation, and unlock valuable insights. 

We’re experiencing rapid growth—backed by HSBC, Citi, and AlbionVC, we secured £14 million in Series A funding in 2021. Our achievements include recognition in the Deloitte UK Technology Fast 50, multiple A-Team Innovation Awards, and a top 1% place to work ranking from The FinancialTechnologist. 

Now is an exciting time to join us as we expand internationally and continue shaping the future of data management. 

About the Engineering Team

Engineering is the heart of Solidatus. Our team of world-class engineers, drawn from outstanding computer science and technical backgrounds, plays a critical role in crafting the powerful, elegant solutions that set us apart. We thrive on solving challenging visualization and data management problems, building technology that delights users and drives real-world impact for global enterprises.

As Solidatus expands its footprint, we are scaling our capabilities with a focus on building world-class connectors and integrations to extend the reach of our platform. Our engineers are trusted with the freedom to explore, innovate, and shape the product’s future — all while working in a collaborative, high-impact environment. Here, your code doesn’t just ship — it empowers some of the world's largest and most complex organizations to achieve their data ambitions.

Who We Are & What You’ll Do

Join our Data Integration team and help shape the way data flows! 

Your Mission:

To expand and refine our suite of out-of-the-box integrations, using our powerful API and SDK to bring in metadata for visualisation from a vast range of sources including databases with diverse SQL dialects.

But that is just the beginning. At our core, we are problem-solvers and innovators. You’ll have the chance to:                                                        

Design

intuitive layouts

representing flow of data across complex deployments of diverse technologies

Design and optimize API connectivity and parsers reading from source systems metadata

Explore new paradigms for representing data lineage

Enhance our data ingestion capabilities to handle massive volumes of data

Dig deep into data challenges to build smarter, more scalable solutions

Beyond engineering, you’ll collaborate with users, troubleshoot tricky issues, streamline development workflows, and contribute to a culture of continuous improvement.

What We’re Looking For

• We don’t believe in sticking to a single tech stack just for the sake of it. We’re engineers first, and we pick the best tools for the job. More than ticking off a checklist, we value mindset, curiosity, and problem-solving skills.
• You’re quick to learn and love diving into new technologies
• You push for excellence and aren’t satisfied with “just okay”
• You can break down complex topics in a way that anyone can understand
• You should have 6–8 years of proven experience in developing, and delivering high-quality, scalable software solutions 
• You should be a strong self-starter with the ability to take ownership of tasks and drive them to completion with minimal supervision.
• You should be able to mentor junior developers, perform code reviews, and ensure adherence to best practices in software engineering.

Tech & Skills We’d Love to See

Must-have:·

• Strong hands-on experience with Java, Spring Boot RESTful APIs, and Node.js
• Solid knowledge of databases, SQL dialects, and data structures

Nice-to-have:

• Experience with C#, ASP.NET Core, TypeScript, React.js, or similar frameworks
• Bonus points for data experience—we love data wizards

If you’re passionate about engineering high-impact solutions, playing with cutting- edge tech, and making data work smarter, we’d love to have you on board!

Be hands-on with describing business rules as technical artifacts for analysts, business product managers, and any functional team that depends on this information

Proficiency with full stack development preferably React, Java, springboot, python. Perform unit tests, resolve bugs and be responsible for the delivery of the project to production

Be a thought leader in bringing the GenAI capabilities to Visa's product development

Be comfortable looking at system logs when needed and identifying bugs when they might appear during course of analysis

Discuss technical implementation details with architects and other technical teams

Collaborate with engineering teams to build robust, reliable, and scalable platforms

Synthesize requirements into a common set of platform and services capabilities

Candidates will be responsible for value proposition definition, communications across technical, business and product functions, cost/benefit analysis, and executive presentations

Partner with business operations and analytics team to build right monitoring capabilities and metrics which helps monitor the health of the platform and facilitates data driven decision making

Define product requirements which involve writing clear, thorough, and detailed user stories for complex features and product sets

Be the primary liaison between business units, business product managers, engineering, and other applicable groups to ensure flawless integration of new and existing feature sets

Highly execution focused by working in conjunction with various counterparts across functions

Ensure product vision and requirements are designed with long-term vision in mind and can be launched globally with minimal tweaks

Work closely with senior leadership providing status, action plan and recommendations

When life gives you lemons and you can code both front and back with equal zest, you’re probably a Full Stack Developer we’d love on our team.

At Lemon Yellow, we’re looking for someone who thrives on building end-to-end web solutions using the MERN stack. From crafting intuitive front-ends to developing efficient, scalable back-end systems, you’ll be involved in shaping digital products from the ground up. If turning design mockups into pixel-perfect, high-performance applications excites you, we’re ready to build with you.

1. Core Responsibilities

• Build and maintain end-to-end web applications using the MERN stack.
• Act as a bridge between design and development to bring ideas to life with clean, scalable code.
• Support digital campaigns through intuitive and functional tech implementations.
• Design, develop, and deploy scalable front-end and back-end components.
• Write clean, maintainable code while collaborating with designers, marketers, and other developers.
• Translate product requirements and UI/UX wireframes into fully functional digital solutions.

2. API & Integration Management

• Implement RESTful APIs and connect third-party tools and services.
• Ensure smooth data exchange across platforms through secure integrations.
• Manage user authentication and authorization using mechanisms like JWT or OAuth.

3. Code Quality & Optimization

• Debug, profile, and optimize applications for performance and reliability.
• Maintain unit and integration test coverage for code robustness.
• Conduct code reviews and help improve internal coding standards.

4. Agile Collaboration

• Actively participate in agile activities: daily stand-ups, sprint planning, retros, and demos.
• Contribute to task estimation and cross-functional problem-solving.
• Stay responsive to project shifts and quick delivery needs.

5. Continuous Learning & Innovation

• Stay up to date with the latest development trends, tools, and practices.
• Share learnings and explore creative solutions for technical challenges.
• Experiment with emerging technologies and suggest process improvements.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• Minimum 1 year of hands-on experience building production-ready web applications using MongoDB, Express.js, React.js, and Node.js.
• Strong command of JavaScript (ES6+), HTML5, and CSS3.
• Experience with Git and version control systems
• Familiarity with RESTful API design, JSON, and authentication mechanisms (JWT, OAuth)
• Familiarity with cloud platforms (AWS, Azure, or GCP) and containerization (Docker).
• Basic understanding of CI/CD pipelines and automated testing.
• Strong analytical and problem-solving mindset.
• Detail-oriented with a passion for clean, maintainable code.
• Collaborative attitude with good verbal and written communication skills.

What are we offering?

Experience

• A chance for you to work in a thriving and growing environment. We foster a culture where growth is harmonious and creativity is always appreciated - you grow and you encourage others to do the same.

Exposure

• If you believe in your work, we believe in you. If you think your designs have the power to change the world, we'll help you bring your vision to life and give you the platform to prove it.

Empathy

• We have a carefully curated culture that promotes 2 things: fun & fulfilment. Your welfare - personal, professional, mental, and physical - becomes our responsibility. From Fitness Thursdays to learning sessions, we try to make you laugh & learn.

Who are we?

Lemon Yellow LLP is a user-centered UI/UX design agency, based out of Thane, Maharashtra. With international operations, an experienced mentorship, and a passionate team, we aim to design digital happiness.

How do you reach us?

Well, after you send in your application, it takes us 2-3 weeks to review it. Sometimes, not often, we might delay just a bit beyond that. This happens when our mailbox is flooded with applications.

We promise we won’t ghost you, you’ll definitely hear from us. In the meantime, feel free to explore our official website.

Job Description in Brief: SiGa Systems is looking for 3 to 8 years of experience who is proficient in PHP/ WordPress/Laravel/ CodeIgniter / to develop Websites and web applications in core PHP. The desired candidate would be involved in a full software/ website development life cycle, starting from requirement analysis to testing. The candidate should be able to work in a team or should be able to handle projects independently. 

Technical Key Skills:

• Expertise in MVC, PHP Framework (Laravel, CodeIgniter), WCF, Web API, and Entity Framework.
• Proficient in jQuery, AJAX, Bootstrap, Proficient in HTML5, CSS3, JavaScript, SQL Server, WordPress, MySQL.
• Hands-on core PHP along with experience in AJAX, jQuery, Bootstrap, APIs
• Experience with Project Management systems like Jira, Trello, Click, Bug herd, Basecamp, etc.
• Experience in Shopify is preferred. High proficiency with Git.
• Must have good communication skills.

Roles & Responsibilities:

• Should be responsible for developing websites and Web Based Applications using Open
• Source systems.
• Monitor, manage, and maintain the server environments where PHP Laravel applications are
• hosted, ensuring optimal performance, security, and availability.
• Integrate third-party APIs and services as needed.
• Strong communication and interpersonal skills, with the ability to work effectively in a
• collaborative team environment.
• Actively participate in quality assurance activities including design and code reviews, unit
• testing, defect fixes, and operational readiness.
• Diagnose and resolve server-related issues, including those impacting the performance of
• Laravel applications. This includes debugging server errors, analyzing logs, and identifying
• root causes of downtime or slow response times.
• Manage development projects from inception to completion autonomously and
• independently
• Provide administrative support, tools, and documentation for specific development projects.
• Design applications and database structures for performance and scalability.
• Deliver accurate project requirements and timeline estimates, providing regular feedback
• and consistently meeting project deadlines.
• Designing and implementing web-based back-end components that are high-performing and
• scalable.
• Participating and improving development processes and tools for other development teams.
• Playing a lead role in software design, architecture, requirements analysis, investigation of
• leading-edge technologies, and software development.
• Contribute with ideas and efforts towards the project and work as part of a team to find
• solutions to various problems. 

Who we are looking for:
- We are looking for an experienced Fullstack Web Application developer.
- You have gained around 5+ years of experience in the implementation of professional web applications using MVC frameworks.
- You are good at and follow strict OO design principles. OOP (Object Oriented Programming).

You will need a high proficiency and experience of:
- PHP based frameworks and other Open Source Technologies.
- MySQL
- REST API / JSON
- GIT
- HTML5/CSS3/JS
- Bootstrap
- Linux
- Laravel / NuxtJS
- Vue.js / React
- Memcached / Redis
- Adhere to Clean Code: SOLID principles and follow TDD
- Design Patterns like Repository pattern.
- PHPUnit
- SSO
- WebRTC
- Socket.IO

About You:
- Proud of the work you do and always being the best you possibly can
- Self-motivated and work well without supervision
- Committed to meeting deadlines
- Security conscious
- Since there is often a need to engage directly with the US Team, it is essential that you are confident and articulative.
- Able to work directly with customers at different stages of the project life cycle
- Must be willing and able to work flexible hours to accommodate client schedules

- Able to work directly with customers at different stages of the project life cycle
- Must be willing and able to work flexible hours to accommodate client schedules

Perks and Benefits:

- Work from Home or your favorite Destination

Preference:

- Candidates closer to Pune are preferred.

Rescale Technologies (A Fincash Group Venture), brain child of three IIT Mumbai alumnus is a tech leader which enables businesses to navigate through technological transformation globally. Rescale has played pivotal role's mergers and acquisitions of numerous brands. (https://rescaletechnologies.com/)

Our USP is Creative Technology, we have a new age of imagination and a brilliant team who are compassionate about success. Here is your chance to ride with us:

Designation: Full Stack Developer

Experience: 2 + years

Education: B.E/B.Tech

Location – Lodha iThink, Palava Dombivali

Job description:

Hands-on experience in Angular or React, node js, Elastic

Knowledge of HTML\Web Development, Networking

Basic knowledge of Programming languages is required.

Good Knowledge of SQL/ RDBMS

Fast learner and desire to learn new technologies to keep up with market trends

Produce clean, efficient code based on specifications.

• Design and develop high-volume, low-latency applications for mission-critical systems, delivering high-availability and performance.
• Contribute in all phases of the development lifecycle.
• Write well designed, testable, efficient code.
• Ensure designs are in compliance with specifications.
• Prepare and produce releases of software components.
• Build and deploy on to AWS
• Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review.

1. Strong fundamentals OOPS concepts, Exception Handling, Coding Standards, Logging

2. Creating custom, general use modules and components which extend the elements and modules of core Angular. 

3. Creating configuration, build, and test scripts for Continuous Integration environments

4. Communicating with external web services and processing data

5. Experience with offline storage threading and performance tuning

6. Review code and maintain the code quality and suggest best practices

7. Knowledge and experience on data science and programming languages

8. Demonstrable abilities to optimize code. Strong analytical skills for effective problem solving