Fullstack Developer

Job Title: Full Stack Developer – Perpetual Trading

Location: Remote

Experience: 3+ Years

Employment Type: Full-Time

About the Company

We are a next-generation cryptocurrency exchange focused on building innovative and secure trading experiences for digital assets and derivatives. With a strong emphasis on perpetual trading and real-time market execution, we aim to redefine how traders interact with crypto markets — combining transparency, performance, and user-centric design.

Role Overview

We are seeking a Full Stack Developer experienced in perpetual trading platforms and Web3 ecosystems. The ideal candidate should have hands-on experience working with both frontend (React/Next.js) and backend (Node.js/Nest.js) systems and integrating decentralized perpetual trading APIs such as GMX, Hyperliquid, or similar. You will build end-to-end high-performance trading modules, ensuring low-latency execution, real-time data sync, and seamless user interaction.

Key Responsibilities

• Design, develop, and maintain full-stack trading modules and dashboards for perpetual and derivatives trading.
• Integrate decentralized perpetual trading APIs (GMX, Hyperliquid, Drift, etc.) and Web3 wallets (MetaMask, WalletConnect).
• Implement real-time order books, market data feeds, and trade execution flows using REST and WebSocket APIs.
• Build scalable backend services using Node.js / Nest.js / Express and connect them to the frontend.
• Manage database operations for user data, trade history, and performance analytics.
• Collaborate with UI/UX, blockchain, and DevOps teams to deliver high-performance trading experiences.
• Optimize both frontend and backend for speed, security, and low latency.
• Write clean, maintainable, and modular code following modern development practices and standards.

Required Skills & Experience

• 3+ years of experience as a Full Stack Developer, preferably in crypto, DeFi, or trading platforms.
• Strong proficiency in React.js / Next.js, Node.js / Nest.js / Express, and TypeScript / JavaScript (ES6+).
• Proven experience integrating perpetual trading or DeFi APIs (GMX, Hyperliquid, Drift, etc.).
• Experience with WebSockets for live order books and trade updates.
• Understanding of Perpetual Trading, Futures, and DeFi trading mechanics.
• Hands-on experience with Web3 libraries (ethers.js, web3.js) for wallet and smart contract integration.
• Strong understanding of RESTful APIs, microservices, and database management (PostgreSQL, MongoDB, or similar).
• Familiarity with security best practices, API rate limiting, and user authentication (JWT/OAuth).

We are seeking a skilled Full Stack (FSE) Developer with expertise in Java, Spring Boot development to join our dynamic team. In this role, you will be responsible for development of critical banking application across various business domains. You will collaborate closely with cross-functional teams to ensure high-quality solutions are developed, maintained, and continuously improved.

Responsibilities:

Development of business-critical banking applications.

Develop new features for banking applications using FSE technologies.

Ensure code quality through proper testing, reviews, and adherence to coding standards.

Collaborate with design, backend, and other teams to deliver seamless user experiences.

Troubleshoot, debug, and optimize performance issues.

Participate in agile development processes and contribute to continuous improvement initiatives.

Requirements:

Bachelors/Masters degree in computer science, Software Engineering, or a related field.

4 – 6 years of relevant experience in application development.

Solid experience in:

Java, Spring Boot.

APIs / REST.

Kubernetes / OpenShift. 

Azure DevOps.

JMS, Message Queues.

Nice to have knowledge in: 

Quarkus.

Apache Camel.

Soft skills / Personality:

Excellent English communication skills / proactive communication.

Candidate needs to have Self-dependent working style.

Candidate needs to have problem solving skills (Strong analytical skills to identify and solve complex issues).

Candidate needs to show high Adaptability (Flexibility in adjusting to different working environments and practices).

Candidate needs to be quick in Critical thinking (Evaluating information and making informed decisions).

Candidate needs to have Team collaboration (Ability to work collaboratively with a distributed team) character.

Candidate needs to have Cultural awareness ability.

Candidate needs to be Initiative (Proactively seeking solutions and improvements).

Good to have knowledge about Co Banking systems.

Good to have Banking domain knowledge.

Experience in customer facing is an advantage.

Skills & Requirements

Java, Spring Boot, APIs/REST, Kubernetes, OpenShift, Azure DevOps, JMS, Message Queues, Quarkus, Apache Camel, Excellent English communication, Proactive communication, Self-dependent working, Problem-solving, Analytical skills, Adaptability, Critical thinking, Team collaboration, Cultural awareness, Initiative, Co-banking systems knowledge, Banking domain knowledge, Customer-facing experience.

Job Description :

Responsibilities :

- Design and develop Python-based microservices

- Build and operate gRPC / Protobuf-based APIs

- Implement asynchronous processing, concurrency, and job orchestration

- Design systems with retries, idempotency, and fault tolerance

- Work with and integrate native C/C++ components with Python services

- Design and optimise PostgreSQL schemas and queries

- Contribute to React-based frontend applications (TypeScript/JavaScript)

- Own features end-to-end : design, development, deployment, and monitoring

- Debug issues across application, system, and performance layers

- Build and maintain CI/CD pipelines and automated tests

Requirements :

- Strong experience in Python backend development (sync + async)

- Hands-on experience with gRPC / Protobuf-based APIs

- Experience with FastAPI / Flask / Django

- Strong understanding of microservices and distributed systems

- Experience with PostgreSQL and data modeling

- Exposure to React / JavaScript / TypeScript

- Knowledge of concurrency, multi-threading, and system design

- Strong understanding of Linux systems and debugging

- Experience in production environments (performance tuning, issue resolution)

- Exposure to C/C++ or Python-native integrations (preferred)

Qualification :

- Engineering Graduates from Tier 1 & Tier 2 Colleges/Deemed Universities only

- Open for candidates from outstation.

- Experience range : 12 - 15 years (but not more than 15 years of experience)

- Strictly Individual contributors, Handson coding. 80% Individual Contributor & 20% Architecture, Design, Systems

Key Responsibilities :

- Design, develop, and maintain applications using Java and Kotlin

- Write clean, scalable, and efficient code

- Build and consume RESTful APIs and microservices

- Participate in all phases of the software development lifecycle

- Work with databases like MySQL, PostgreSQL, or MongoDB

- Collaborate with cross-functional teams including Product, QA, and DevOps

- Conduct unit testing and assist in code reviews

- Troubleshoot and debug applications

- Ensure application performance, security, and scalability

Required Skills :

- Strong programming experience in Java (Core/Advanced)

- Experience in Kotlin

- Solid understanding of OOP concepts, design patterns, and data structures

- Experience with frameworks such as Spring Boot, Ktor, or Android SDK

- Proficient in building and consuming RESTful APIs

- Familiarity with Git, JIRA, and CI/CD tools

- Basic knowledge of unit testing frameworks like JUnit or Mockito

Lead Java Developer (Spring Boot)

Job Type: Full-Time

Location: Bangalore / Hyderabad / Pune / Chennai 

Work Mode: Hybrid

Experience: 6+ Years

Key Responsibilities:

Lead the design and development of scalable backend applications using Java (Spring Boot).

Mentor and guide a team of developers to ensure high-quality deliverables.

Take ownership of solution architecture, coding standards, and design patterns.

Develop and manage RESTful APIs and integrate third-party services.

Collaborate with front-end teams, QA, and stakeholders to align technical implementation with business goals.

Oversee deployments in hybrid cloud environments in coordination with DevOps teams.

Conduct code reviews, lead design discussions, and manage agile development processes (Scrum/Kanban).

Monitor application performance and drive improvements proactively.

Troubleshoot and resolve complex software issues across systems and services.

Required Skills:

8+ years of professional experience in Java development, with at least 2 years in a lead role.

Strong hands-on expertise in Spring Boot and microservices architecture.

Working knowledge of Node.js and JavaScript/TypeScript.

Experience with REST APIs, SQL/NoSQL databases (MySQL, PostgreSQL, MongoDB).

Familiar with CI/CD pipelines, Git, and modern DevOps practices.

Proven ability to lead distributed teams and manage deliverables in a remote/hybrid work setup.

Strong communication, leadership, and problem-solving skills.

Technical Skills : Node.js, Restful, Express, React.js, Redux, MongoDb

• Previous working experience as a MEAN/MERN Stack Developer for at least 2 years.
• In depth knowledge of React.js, Angular.js, NodeJS, ExpressJS.
• Experience implementing applications using React.js and Angular.js.
• Experience creating front end applications using HTML, React and Angular.
• Hands on experience with JavaScript Development on both client and server-side

Preferred Qualifications & Desired Competencies:

• Can-do attitude and bring a go-getter
• Ability to learn new technologies quickly.
• Self-motivated, results-driven individual and passionate about work.
• Excellent communication skills and problem solving skills

https://polyglots.io">Polyglots is a young and innovative software development agency located in Pune, India. Our expertise is to build highly scalable applications and infrastructure solutions for our partners and budding startups.

We provide end-to-end solutions ranging from cloud architecture to backend services and modern frontend development. We leverage agile methodologies, software life cycle best practices and cutting edge technology to deliver perfect solutions reflecting our passion for software development.

We care about our company culture and invest in people to create the best teams of highly skilled developers. 

We are looking for a Fullstack Developer who is motivated to combine the art of software design with the skill of programming. Responsibilities will include translation of the business requirements to actual code that will produce a flexible and scalable cloud application. You will guide the team on technical implementations, take an active role on both sides i.e frontend + backend and define how the application works.

• Develop and design RESTful/GraphQL services and APIs.
• Develop databases, applications, and servers to support websites on the back end.
• Develop visually appealing front end website architecture, including translating designer mock-ups and wireframes into front-end code.
• Design user interactions on web pages
• Stay up to date of developments in web applications and programming languages
• Strategize organizational direction on emerging technology platforms and communicate the effectiveness to executive stakeholders
• Ensure that non-functional requirements such as security, performance, maintainability, scalability, usability, and reliability are being considered when architecting solutions.

• Proficiency in Java along with Spring Boot.
• Proficiency with fundamental front end languages such as HTML, CSS and JavaScript.
• Familiarity with JavaScript frameworks such as Angular, React or VueJS.
• Familiarity with database technology such as Postgres, MySQL, Oracle and MongoDB.
• Well versed with Data Structures and common Design Patterns.
• Strong organizational and project management skills.
• Excellent verbal communication skills.
• Good problem solving skills.
• Attention to detail.