
We are looking for a passionate and skilled Node.js Developer to join our dynamic team. If you're excited about building scalable and efficient backend applications using modern technologies, we’d love to hear from you!
Responsibilities
Develop and maintain server-side components using Node.js
Design and build scalable RESTful APIs
Ensure high performance and responsiveness of applications
Implement security and data protection measures
Collaborate with team members to define and deliver high-quality software
Write unit and integration tests to ensure software quality
Required Skills
✅ Strong proficiency in JavaScript
✅ Good understanding of Node.js and Express
✅ Experience with NoSQL databases, especially MongoDB
✅ Familiarity with Git and version control workflows
✅ Ability to write reusable, testable, and efficient code
✅ Experience with JWT and modern authorization mechanisms
✅ Knowledge of security and data protection best practices
✅ Strong analytical and problem-solving skills

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About the company
Sigmoid is a leading data solutions company that partners with Fortune 500 enterprises to drive digital transformation through AI, big data, and cloud technologies. With a focus on scalability, performance, and innovation, Sigmoid delivers cutting-edge solutions to solve complex business challenges.
About the role
You will be responsible for building a highly scalable, extensible, and robust application. This position reports to the Engineering Manager.
Responsibilities:
- Align Sigmoid with key Client initiatives
- Interface daily with customers across leading Fortune 500 companies to understand strategic requirements
- Ability to understand business requirements and tie them to technology solutions
- Open to work from client location as per the demand of the project / customer
- Facilitate in Technical Aspects
- Develop and evolve highly scalable and fault-tolerant distributed components using Java technologies
- Excellent experience in Application development and support, integration development and quality assurance
- Provide technical leadership and manage it day to day basis
- Interface daily with customers across leading Fortune 500 companies to understand strategic requirements
- Stay up-to-date on the latest technology to ensure the greatest ROI for customer & Sigmoid
- Hands on coder with good understanding on enterprise level code
- Design and implement APIs, abstractions and integration patterns to solve challenging distributed computing problems
- Experience in defining technical requirements, data extraction, data transformation, automating jobs, productionizing jobs, and exploring new big data technologies within a Parallel Processing environment
Culture:
- Must be a strategic thinker with the ability to think unconventional / out-of-box
- Analytical and solution driven orientation
- Raw intellect, talent and energy are critical
- Entrepreneurial and Agile: understands the demands of a private, high growth company
- Ability to be both a leader and hands-on "doer"
Qualifications:
- Years of track record of relevant work experience and a computer Science or a related technical discipline is required
- Experience in development of Enterprise scale applications and capable in developing framework, design patterns etc. Should be able to understand and tackle technical challenges and propose comprehensive solutions
- Experience with functional and object-oriented programming, Java or Python is a must
- Experience in Springboot, API, SQL
- Good to have: GIT, Airflow, Node JS, Python, Angular
- Experience with database modeling and development, data mining and warehousing
- Unit, Integration and User Acceptance Testing
- Effective communication skills (both written and verbal)
- Ability to collaborate with a diverse set of engineers, data scientists and product managers
- Comfort in a fast-paced start-up environment
- Experience in Agile methodology
- Proficient with SQL and its variation among popular databases
Your responsibilities will include:
Designing, implementing and maintaining Java-based applications
Contributing in all phases of the development lifecycle
Writing testable, scalable and efficient code
Test and debug new applications and updates
Maintain up to date code documentation
Participating in code reviews
Key Requirement:
- You have prior experience in Core Java.
- Strong knowledge of Java Application Frameworks
- Hands-on experience working in SQL
Job Location
Bengaluru, India
Job Type
Contractual Position with Potential for Full-Time Employment Based on Performance Review
Experience Required
4 years of experience in Java & Technologies
Company Description
Welcome to Unitalks Technologies! We are a managed services provider that helps our clients hire top-quality talent. We are hiring for one of our clients in Bengaluru, more details will be provided about the company and culture later in the process.
Role Description
This is a contract role for a Senior Java Software Engineer. As a Senior Java Software Engineer, you will be responsible for designing and developing software solutions, building and maintaining Microservices architectures, and programming using Spring Boot. This role is based in Bengaluru and is an on-site position.
Qualifications
- Software Development and Programming skills
- Experience with Microservices and the Spring Boot
- Proficiency in Java, SQL and UNIX
- Good in deployment on different platforms like AWS, Azure, etc.
- Strong problem-solving and analytical skills
- Excellent communication and teamwork abilities
- Bachelor's or Master's degree in Computer Science or a related field
- Experience with Agile methodologies and CI/CD pipelines
- Knowledge of cloud platforms and containerization technologies is a plus

Job Overview
We are looking for a talented Senior Backend Developer to join our team in developing backend servicing. As a key member of our development team, you will be responsible for cross-functional teams to design, develop, and maintain backend services and APIs using Node.js. The ideal candidate is passionate about distributed systems, has experience with backend services and is excited about optimising applications for performance, scalability, and reliability.
Responsibilities:
- Design, develop, and maintain backend services and APIs using Node.js.
- Collaborate with cross-functional teams to define requirements, architect solutions, and implement features.
- Write clean, modular, and maintainable code following best practices and coding standards.
- Optimise applications for performance, scalability, and reliability.
- Implement security measures to ensure data privacy and integrity in backend systems.
- Troubleshoot and debug issues to ensure smooth operation of production systems.
- Perform code reviews to maintain code quality, consistency, and adherence to coding standards.
- Stay updated with the latest trends and technologies in backend development, Node.js, and related ecosystems
Requirements:
- Bachelor's degree in Computer Science, Engineering, or related field.
- Proven experience in backend development, with at least 4 years of experience using Node.js.
- Strong understanding of data structures, algorithms, and software design principles.
- Experience with web frameworks such as Express.js.
- Proficiency in building RESTful APIs and microservices architecture.
- Familiarity with relational and NoSQL databases (e.g., MongoDB, PostgreSQL).
- Solid understanding of asynchronous programming and event-driven architectures.
- Experience with version control systems (e.g., Git) and collaborative development workflows.
- Excellent problem-solving, analytical, and troubleshooting skills.
- Ability to work independently and in a team environment, with excellent communication skills.



Responsibilities:
• Take on complex problems that span multiple components and teams.
• Independently own one or more multiple modules, which include: requirement analysis, design, development, maintenance & support
• Write extensive, efficient code to address complex modules that handle the interaction between multiple components.
• Rapidly iterate to add new functionalities and solves complex problems with simple and intuitive solutions
• Produce architecture with clean interfaces, that are efficient and scalable
• Participate and contribute to architectural discussions
• Solve production issues. Investigate and provide solutions to minimize the business impact due to the outage
• Continuously improve performance metrics of modules you own.
• Collaborate effectively across teams to solve problems, execute and deliver results
Requirements:
• Experience: 3+ years
• A Bachelor's or Master's Degree in Computer Science
• Software engineering and product delivery experience, with a strong background in algorithms
• Experience in architecting & building real-time, large-scale e-commerce applications
• Experience with high-performance websites catering to millions of daily traffic is a plus
• Excellent command over Data Structures and Algorithms
• Experience with web technologies, Go/Java/Python
• Language: GO or Python
• Strong expertise in DS and Algo
• Strong leadership skills - have experience mentoring, building products from scratch or incumbent in design and architecture.
• Have worked in the scaling of the system right from scratch.
• Someone worked in small user base to a large user base and wrote optimized code
• Both HLD and LLD


Good knowledge of Python frameworks such as Django, CherryPy, etc.
Good understanding of REST API
Experience with JavaScript, jQuery, HTML and CSS
Build back-end features in Python that are efficient.
Integrate front-end and back-end components into the application
Develop integrations with third party applications (mostly web-based).
Working Knowledge of SQL and databases.
Bachelor’s Degree in Computer Science Engineering or other related fields.
Understand the needs of the client and Implement functional requirements accordingly.
Agile development methodology
Good communication (verbal and written)
- Developing and maintaining all server-side network components.
- Ensuring optimal performance of the central database and responsiveness to front-end requests.
- Collaborating with front-end developers on the integration of elements.
- Designing customer-facing UI and back-end services for various business processes.
- Developing high-performance applications by writing testable, reusable, and efficient code.
- Implementing effective security protocols, data protection measures, and storage solutions.
- Running diagnostic tests, repairing defects, and providing technical support.
- Documenting Node.js processes, including database schemas, as well as preparing reports.
- Recommending and implementing improvements to processes and technologies.
- Keeping informed of advancements in the field of Node.js development.

Relevant Experience
3 to 10 years
Job Description and Key Skills Required:
- Hands-on with any of the programming languages like NodeJS/ExpressJS, Python, Java, Php or any.
- Design and create efficient RESTful API endpoints for both internal and public consumption
- Strong understanding of database technologies such as MySQL, Postgress, Oracle , relational Database.
- Work closely with front end developers to understand required data model
- Comfortable deploying applications on AWS, and have a strong working knowledge of EC2, RDS and S3.
- Must understand overall system design, architecture , improve design and implement new processes.
- Strong understanding of sessions, cookies & local storage is must.
- Experience with in memory databases like redis basic, Memcache
- Independently think of solutions to complex requirements; possess exceptional logical skills.
- Analyse current products in development, including performance, scalability, diagnosis and troubleshooting.
- Work with the existing framework and evolve it by building reusable code & libraries
- Search and introduce new software related technologies, processes and tools.
- Bonus: You're fluent with React.
- Bonus: Interested in full-stack development.
- Bonus: Any experience of iOS/Android mobile development.
- Bonus: Experience with CI servers such as Jenkins, Travis or similar types
- Bonus: Experience with web server like Nginx
Server Side skills:
Should have handson experience on JS technologies more than 3+ years
Building interactive dasboards from multiple systems and RESTfully
abstract to the UI through a Node.js backend
In depth knowledge of NodeJS, ExpressJS and Restify
Knowledge of authentication using PassportJS, AuthO or JWT.
Knowledge of media content uploading using any cloud
Should have good understanding of request validation, schema
validation and Error handling
Good understanding of Promises, Async/Await and Callbacks
Should have knowledge of Socket, Pubsub.
Payment gateways integration using Braintree, Stripe or any other
would be a good skills to have.
Should have good understanding of scheduled tasks in NodeJS and
CronJobs
In depth knowledge of ORM like Mongoose, Sequalize or KnexJS.
Hands on experience with JavaScript/TypeScript Development on
server side.

