NodeJS developer

About Us:

Tradelab Technologies Pvt Ltd is not for those seeking comfort—we are for those hungry to make a mark in the trading and fintech industry. If you are looking for just another backend role, this isn’t it. We want risk-takers, relentless learners, and those who find joy in pushing their limits

every day. If you thrive in high-stakes environments and have a deep passion for performance driven backend systems, we want you.

What We Expect:

• You should already be exceptional at Golang. If you need hand-holding, this isn’t the place for you.

• You thrive on challenges, not on perks or financial rewards.

• You measure success by your own growth, not external validation.

• Taking calculated risks excites you—you’re here to build, break, and learn.

• You don’t clock in for a paycheck; you clock in to outperform yourself in a high-frequency trading

environment.

• You understand the stakes—milliseconds can make or break trades, and precision is everything.

What You Will Do:

• Develop and optimize high-performance backend systems in Golang for trading platforms and financial

services.

• Architect low-latency, high-throughput microservices that push the boundaries of speed and efficiency.

• Build event-driven, fault-tolerant systems that can handle massive real-time data streams.

• Own your work—no babysitting, no micromanagement.

• Work alongside equally driven engineers who expect nothing less than brilliance.

• Learn faster than you ever thought possible.

Must-Have Skills:

• Proven expertise in Golang (if you need to prove yourself, this isn’t the role for you).

• Deep understanding of concurrency, memory management, and system design.

• Experience with Trading, market data processing, or low-latency systems.

• Strong knowledge of distributed systems, message queues (Kafka, RabbitMQ), and real-time processing.

• Hands-on with Docker, Kubernetes, and CI/CD pipelines.

• A portfolio of work that speaks louder than a resume.

Nice-to-Have Skills:

• Past experience in fintech.

• Contributions to open-source Golang projects.

• A history of building something impactful from scratch.

• Understanding of FIX protocol, WebSockets, and streaming APIs.

Job Title: Golang Developer

Location: Kolkata

Job Type: Full-time

Working Days: 5 Days (Rotational off)

About the Role:

We are seeking a skilled Golang Developer with experience in Golang, Node.js, WebSocket

communication, and API development. In this role, you will work closely with our development

team to design, develop, and maintain high-performance backend systems and real-time

applications.

Key Responsibilities:

 Design, build, and maintain efficient, reusable, and reliable Golang code.

 Develop scalable APIs and microservices.

 Integrate and build real-time communication using WebSocket protocols.

 Collaborate with frontend developers and other team members to establish objectives

and design more functional, cohesive systems.

 Write clean, maintainable, and well-documented code.

 Optimize applications for maximum performance, scalability, and security.

 Participate in code reviews, contribute to team knowledge, and continuously improve

development processes.

 Troubleshoot, debug, and upgrade existing systems.

 Occasionally work with Node.js services and modules when needed.

Required Skills and Qualifications:

 Min 3+ years of experience in backend development with Golang.

 Solid understanding of Node.js and JavaScript/TypeScript.

 Hands-on experience with WebSocket integration and real-time applications.

 Strong knowledge of RESTful APIs, API design principles, and API documentation. Experience with relational and NoSQL databases (e.g., MySQL, PostgreSQL, MongoDB).

 Good understanding of concurrent programming and microservices architecture.

 Familiarity with cloud platforms (AWS, GCP, Azure) is a plus.

 Knowledge of containerization tools like Docker and Kubernetes is a plus.

 Strong problem-solving skills, attention to detail, and a proactive attitude.

Experience: 2 years - 4 years
providing 100% remote 

We love solving hard problems together because the hardest challenges are often the most rewarding. You will have an opportunity to create products that will disrupt the industry. Providing customer delight is not just a phrase for us - It’s our mantra, Voice will always be heard - we encourage different points of view. 

Do you aspire to be a tech ninja?

Do you have a passion for building products in India and changing the worldview that we are just about services?

We want people who go deep and understand the fundamentals

RESPONSIBILITIES:

• Development and maintenance of automatic regression tests suites used in the product delivery process
• Development and maintenance of testing frameworks supporting the automatic regression testing
• Management and tracking of automatic regression test suite execution
• You will own some or all of a product/feature. You will also mentor others, read and review code, maintain code, deploy code, and tune the performance of systems.

SKILLS AND ABILITIES:

• We’re looking for 2 - 4 years of experience. However, the number is irrelevant if you have the necessary skills.
• Strong proficiency in Java, J2EE, JDBC, Spring MVC & Boot, Hibernate, PL/SQL, HTML, CSS, JavaScript and JQuery, Ajax
• Good exposure to RESTful API concept and JSON
• Experience with cloud-based technologies such as AWS.
• Proficient understanding of development tools such as SVN, GIT
• Good communication skills with proficiency in English (Oral and Writing) / banking knowledge. 

Plus Points:

• Product experience
• Startup experience
• Technologies that are Self-taught
• Contributed to stock exchange etc
• Open source contributions
• Any of your work in public that we can see

Responsibilities:

- Integration of user-facing elements developed by front-end developers with server-side logic.

- Writing reusable, testable, and efficient code.

- Design and implementation of low-latency, high-availability, and performant applications.

- Implementation of security and data protection.

- Integration of data storage solutions {mysql, redis}.

- Understanding the requirements and planning the implementation accordingly.

- Good interaction with the team. Good debugging skills.

Skills:

- Strong proficiency with JavaScript {optimized code}.

- Knowledge of Node.js and frameworks available for it {sequelize}.

- Understanding the nature of asynchronous programming and its quirks and workarounds.

- Optimization in terms of memory and time.

- Good understanding of server-side templating languages.

- Basic understanding of front-end technologies, such as HTML5, and CSS3.

- Understanding accessibility and security compliance.

- User authentication and authorization between multiple systems, servers, and environments.

- Integration of multiple data sources and databases into one system.

- Understanding fundamental design principles behind a scalable application.

- Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform.

- Creating database schemas that represent and support business processes.

- Implementing automated testing platforms and unit tests.

- Proficient understanding of code versioning tools, such as Git.

We are looking for a high-performing Lead Developer to build our Ecommerce platform and API framework powered by Machine Learning and Artificial Intelligence. Candidates for this role will be passionate about well written code, testing, and excel at coming up with simple approaches to complex problems.

Our work culture is #overachiever, very amiable, and at the same time always charged with excitement. We encourage our team members to take responsibility and grow into future leaders in the industry.

Job Responsibilities:

• Understand project requirements, writing bug free clean code and ensure that the solution works per the agreed architecture, SLAs, KPIs and business model
• Integrate Django backend with third party API
• 100% Hands on role
• Make architecture decisions that contribute to maintainable systems
• Adapt to rapidly evolving requirements and changing priorities and drive the team accordingly
• Responsible to drive and support Ecommerce project activities and ensure marketplace implementation, deepen customer engagement, satisfaction, and user engagement
• Reverse engineer for debugging errors in code and ensure quality control in the process.
• Continually drive products towards a meaningful balance between user needs, business objectives and technical feasibility
• Documentation and reference preparation for users by writing operating instructions including changes and revisions.
• Operate in a hyper-collaborative way and follow these guiding principles: Value common sense and simplicity over complexity, make decisions quickly and move nimbly, celebrate diverse ideas, Succeed and fail together as a team

Qualifications:

• Bachelor or Master Degree in Computer Science, Software Engineering from a reputed University
• 5 to 10 years of experience working in eCommerce domain, specifically at-least 3-5 years of experience working in Django and Python.
• React and/or Angular for front end
• Proficiency in MongoDB and MySql
• Technical Skills: JIRA, Gitlab, Rest API, GCP or AWS
• Integration experience with Payment gateway, shipping company and VAT, database concepts, Experience of web services
• Experience in performance profiling, tuning, and optimization, caching mechanisms with Enterprise level applicants
• Analytical, debugging, and troubleshooting skill with proven experience troubleshooting and fixing production bugs
• Experience in writing unit testing and test case automation.
• Ability to operate in Agile environment with a start-up mentality and unstructured environment, Energy, drive and passion to work, and operate in a digital world.