11+ System integration testing Jobs in Delhi, NCR and Gurgaon | System integration testing Job openings in Delhi, NCR and Gurgaon

• Hands-on expertise in managing technical teams and work closely with business stakeholders
• Should be familiar with card testing and POS ecosystem.
• Experience with designing APIs and building platform integrations in Commerce, POS, FinTech and Payments
• Payment’s domain experience.
• Extensive experience on Base24 & SWITCH part for payment format.
• Exposure on ISO8583 Messaging system.
• API understanding and creation.
• Working knowledge on cryptographic algorithms (RSA, EC, AES, SHA variants), TLS/SSL protocols. C Symetric and A symetrics, K.M.S.
• Digital Payments technical knowledge - QR/ POS/ UPI/ BQR
• Understanding of CI/CD pipelines, Kubernetes, containerization, Docker
• Must have strong technical skills in Android APK and iOS development Concept and Web services.
• Supportability, monitoring, ops in general.
• Accurate cost models to deploy and operate
• Extensive experience in TLOG’s, data integration with downstream applications, and impact of POS changes on different financial, legal, compliance, loss prevention, etc. applications.
• Extensive experience with payment systems 7861 (EMV, payment middleware, encryption, tokenization, settlement, offline scenarios,).
• Extensive experience with different types of payment methods including credit, debit, gift cards (Both closed loop and open loop), PLCC, PayPal, AliPay, checks, etc. as well as different payment form factors like Tap N Go, contactless, swipe, EMV, Mobile, etc.
• Extensive experience with payment devices (pin pads, printers, registers, scanners).
• Experience in Node.js / Java / Python, building REST APIs, with experience/exposure to front end stack like JavaScript & React / Angular. 
• Experience with Storage systems - RDBMS, NoSQL (Cassandra/MongoDB), Redis/Memcache/Aerospike.
• Experience in messaging tools like Kafka/AWS Kinesis etc...
• Design expertise for performance, scalability, fault tolerance and high availability

• Experience with POS systems and Payments domain.
• Demonstrated experience for systems architecture, design, and integration for POS systems
• Java and/or Node.js. Experience building micro services (REST APIs) using Node.js
• Experience with one or more RDBMS databases like MySql, PostGreSQL
• Experience with one or more NoSQL databses like MongoDB, Cassandra, DynamoDB, Aerospike, Elastic Search, Redis, neo4j etc.,
• Caching technologies like: Redis, Elasticache,
• Cloud Providers like: AWS/ Google Cloud / Azure
• CI / CD : Jenkins, Docker, Kubernete
  

About the job

Key Responsibilities

1. Design, develop, and maintain dynamic, responsive web applications using React.js and Node.js.

2. Build efficient, reusable front-end and back-end components for seamless performance.

3. Integrate RESTful APIs and third-party services.

4. Collaborate with UI/UX designers, mobile teams, and backend developers to deliver high-quality products.

5. Write clean, maintainable, and efficient code following modern coding standards.

6. Debug, test, and optimize applications for maximum speed and scalability.

7. Manage databases using MongoDB and handle cloud deployment (AWS, Firebase, or similar).

8. Participate in code reviews, architectural discussions, and agile development cycles.

Required Skills & Experience

1. 1-5 years of proven experience in Full Stack Web Development using the MERN stack.

2. Proficiency in React.js, Node.js, Express.js, MongoDB, and JavaScript (ES6+).

3. Strong understanding of HTML5, CSS3, Bootstrap, and Tailwind CSS.

4. Hands-on experience with API design, state management (Redux, Context API), and authentication (JWT/OAuth).

5. Familiarity with version control tools (Git, Bitbucket).

6. Good understanding of database design, schema modeling, and RESTful architecture.

7. Strong problem-solving skills and ability to work in a collaborative team environment.

Perks & Benefits

• Onsite opportunity in our modern Greater Noida office.
• Competitive salary based on skills and experience.
• Exposure to real-world projects and latest tech stacks.
• Work with a creative and talented team.
• Career growth opportunities in full-stack and cross-platform development.

Benefits:

• Health insurance
• Leave encashment
• Paid sick time
• Paid time off
• Work from home

Application Question(s):

1. How many years of _____ experience do you have?
2. What is your current CTC?
3. What is your expected CTC?

About the Role

We are looking for a highly skilled and experienced Junior React Native Developer to join our team and take the lead on developing our cross-platform mobile application. You’ll play a critical role in building, launching, and scaling a high-performance mobile app that runs seamlessly on both iOS and Android platforms from a single codebase.

If you’re passionate about mobile technologies, have a strong command of React Native, and are excited about creating a high-quality product from the ground up, we’d love to hear from you.Responsibilities

• Lead the end-to-end development of a cross-platform mobile application using React Native.
• Collaborate with product managers, designers, and backend engineers to deliver high-quality user experiences.
• Build reusable components and front-end libraries for future use.
• Optimize app performance for speed and scalability across devices and OS versions.
• Ensure the app complies with design standards and platform-specific guidelines (Apple App Store & Google Play).
• Set up CI/CD pipelines for automated builds, testing, and deployment (e.g., using Fastlane, EAS, or similar).
• Integrate RESTful APIs and third-party services.
• Handle app store submissions and updates.
• Mentor junior developers and enforce best practices in mobile development.

Requirements

Must-Have:

• 1+ years of experience in mobile application development.
• 1+ years of hands-on experience with React Native.
• Strong understanding of JavaScript (ES6+), TypeScript, and React architecture.
• Deep knowledge of iOS and Android mobile app development lifecycle.
• Experience with mobile UI/UX best practices and performance optimization.
• Familiarity with native build tools (Xcode, Android Studio).
• Experience integrating REST APIs and handling network latency issues.
• Proficient with Git, GitHub/GitLab, and agile development practices.
• Experience with push notifications, in-app purchases, deep linking, and analytics SDKs.

Preferred:

• Experience with Expo or EAS for managed workflows.
• Familiarity with mobile CI/CD pipelines (Fastlane, Bitrise, etc.).
• Experience with native modules (Objective-C/Swift and Java/Kotlin) as needed.
• Knowledge of automated testing frameworks (Jest, Detox).
• Published apps in both the App Store and Google Play.
• Prior experience in startups or high-growth environments.

What We Offer

• Opportunity to lead and build a product from the ground up.
• Work with a dynamic and talented team in a fast-paced environment.
• Flexible working hours and remote-first culture.
• Competitive salary and equity options (if applicable).
• Learning and development budget.

Experience: 7+ Years

Job Location: Remote/ hybrid

No. of Position: Multiple

Qualifications: B. Tech / M. Tech / MCA

Work Timings: 1:30 PM IST to 10:30 PM IST

Functional Area: Software Development

We are looking for a highly motivated and talented Software (Python) Developer to join our team and help build the components of the solutions. The ideal candidate is a versatile self-starter with a background in Python development. The Software Engineers responsibilities include designing and developing software for an large scale application that is hosted in AWS/Azure cloud platform.

Key Responsibilities

• Develop high-quality software that is performant, scalable, reusable and extensible in python.
• Responsible for over-all software development life cycle from design to delivery.
• Adoption and Evolution of the software engineering practices and tools within the organization.
• You will work closely with product management and other development teams to create responsive, and interactive interfaces.
• You will work closely with our solution architects, analysts and design team members to develop specifications.
• You must be able to design solution based on requirement and acceptance criteria provided in the story.
• Collaborate with other technology and business teams within the organization to provide efficient robust solutions to the problems.
• You will be required to demonstrate problem solving & debugging skills.

• Make improvements to our microservices, Cloud APIs and work on developing new capabilities in existing code base.
• Enhance existing capabilities in the application to meet the customer needs.
• Need to work in collaboration with other team members and management team.
• Uses data visualization techniques to provide insights on large data sets and input to finish Dashboards.
• Builds and maintains datasets to help subject matter expert.
• Must be able to work independently with some oversight and function effectively as part of a team in a joint working environment.
• Ability to prioritize work, meet deadlines, achieve goals, and work under pressure in a dynamic and complex environment

Skills, Knowledge and Experience

• Must have 4+ years of experience in python application development
• Must have 1+ years of experience with Django framework.
• Deep understanding of object oriented and functional paradigms.
• Solid background in RESTful Web Services.
• Excellent verbal, written, and interpersonal communication skills
• Knowledge of Relational database (MySQL, SQL Server, Oracle) and NoSQL is required.
• Knowledge of reactJS to be a Full-stack developer is a plus.
• Experience in visualization tools such as Tableau and Power BI is a plus.

• Key Result Areas

1. End to end ownership in the consumer facing B2C tech team and deliver solutions to solve business problems.

1. Advanced Javascript, CSS, HTML 5, D/XHTML, XML, JSON, DOM Concepts

1. Must have worked on a SPA framework: ReactJS, Node JS, AngularJS or InfernoJS

1. Own the development methodology. Align with the executive team to improve the development process, prioritize projects and manage multiple work streams

1. Extensive Work with open-source technologies and built services architecture as this will prove to be an invaluable asset in building solutions.

1. Lead a team of Software Developers, Server Engineers and QA Engineers, establishing development practices and standards

1. Extensive skill on React JS, Node JS

1. Experience on various PHP frameworks like Cakephp, Laravel, CI etc would be plus

1. Work with scrum teams and product managers using agile methodologies to deliver high quality solutions on time
2. Jumping on a call with clients to understand the requirement and profile them the right solution, helping formulate an effective solution and turning it into a working application
3. Conducting website performance and unit tests
4. Heavy involvement in the requirements gathering, development and operational stages of new projects
5. Troubleshoot and debug related application defects with existing and new applications
6. Work collaboratively with the frontend team and other team members, train other members and get trained if required

• Think like a product owner
• Design and build new products and manage their delivery
• Drive culture, learning, and development of team members and of the larger org
• Mentor, motivate & ensure delivery from a small team
• Take ownership and get the job done
• Ensure the quality of deliverables

• 4-7 years of hands-on experience in the design and development of applications using NodeJs, ReactJs, MySQL, etc.
• Good architectural and design skills
• Strong coding, data structures, and algorithms
• An engineering degree preferably, from a top-tier school (or an equivalent experience)
• Proficient understanding of code versioning tools, such as Git/SVN
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Experience in Elastic Search/ Solr/ Amazon AWS
• Experience building sites to function cross-platform and cross-browser
• The ability to own end-to-end responsibility
• The role will give you an opportunity to work with a cross-functional team from Business, Product, and Design, and lead a team of 4-7 rockstar engineers.

• A team of aces, from top-tier schools and startups, to work with
• A fast-paced, data-driven, and fun work environment
• A huge appetite for new, disruptive, creative, and implementable ideas
• An open work culture

• Competitive salary
• A great working environment with an opportunity to work directly with the founders on very exciting real-life problems
• Opportunity to grow really fast.
• Opportunity to hire a team & mentor them.
• ESOPs