Senior Data Scientist

Senior Software Engineer — JavaScript Full-Stack

Experience: 4–6 years Location: Ahmedabad (Work from Office)

About the Role

We're hiring a senior engineer who can own systems end-to-end on live, production JavaScript/TypeScript applications. You'll work across React frontends, Node backends, and the databases behind them — you don't need to be the deepest expert in every layer, but you should be strong across the stack and able to make architectural calls that hold up.

This role involves real client interaction, technical decision-making, and shipping into production — not just executing tickets. You'll also be someone the mid-level and junior engineers learn from.

What You'll Do

• Design, build, and maintain scalable full-stack applications running in production
• Own technical decisions on architecture, data modeling, deployments, and performance trade-offs
• Debug live issues across the stack, identify bottlenecks, and improve performance
• Participate in client conversations: scoping, technical discussions, demos, and updates
• Review code and raise the team's bar — including the judgment to catch when AI-generated code is subtly wrong, overengineered, or a poor fit
• Mentor junior and mid-level engineers and contribute to team engineering standards
• Continuously evaluate and adopt tools and practices that improve delivery
• Work in an Agile / Scrum setup with regular delivery cycles

Must-Have

• 4–6 years building and shipping production JavaScript/TypeScript applications
• Strong full-stack ability — genuinely comfortable owning both React frontends and Node backends; can architect a feature from UI to data layer
• Deep JavaScript and TypeScript — language fundamentals, async patterns, typing discipline, and the ability to teach these to less experienced engineers
• Strong React — advanced hooks, state management, performance optimization, component architecture, and structuring large apps
• Strong Node backend — REST (and ideally some GraphQL or real-time) APIs, auth, error handling, and integrating third-party services; experience with Express, Nest, or similar
• Solid SQL and NoSQL — data modeling across relational and document paradigms; able to pick the right store for the problem and design schemas that hold up under load and change (PostgreSQL, MySQL, MongoDB, or similar)
• Hands-on AWS — deploying and operating applications, comfortable picking up new services, and debugging issues in production cloud environments
• System design fundamentals — caching (Redis/Memcache), queues, REST/API design, and an understanding of scaling and reliability trade-offs
• Track record on live production systems — operating, supporting, and evolving systems, not only greenfield builds or POCs
• Git workflows in a team — branching, reviews, conflict resolution
• Day-to-day use of AI coding tools (Cursor, GitHub Copilot, Claude Code, or similar) and a point of view on where they help vs. hurt
• Strong communication — can explain technical decisions to clients and non-technical stakeholders
• Independence — breaks down ambiguous problems, designs solutions, and ships without hand-holding

Strong Plus (one or more)

Architecture & Scale

• Microservices, API gateways, event-driven patterns
• Caching strategies, queue-based processing, eventual consistency
• Real-time systems (WebSockets, SSE)

Frontend Depth

• Next.js (SSR/SSG), advanced performance work, design systems
• Accessibility and cross-platform/responsive expertise
• React Native

DevOps / Platform

• CI/CD pipelines, Docker, infrastructure-as-code
• Observability and production monitoring

AI Engineering

• LLM-powered features: RAG, agentic workflows, tool use
• Vector databases (Pinecone, Weaviate, Qdrant, pgvector)
• Prompt engineering, evals, and observability for LLM apps

Nice to Have

• Automated testing depth (unit, integration, e2e)
• Security fundamentals: auth flows, secrets management, OWASP basics
• 
  

Description

We’re looking for a QA Engineer to join our fast-paced engineering team and ensure the delivery of high-quality, bug-free software. You’ll be responsible for designing and executing automated test suites, ensuring product reliability, and maintaining QA best practices across the development lifecycle.

This is a hands-on, in-office role based in Coimbatore, ideal for someone who enjoys working closely with developers and product teams to identify issues early and ship stable features faster.

Responsibilities

Design, develop, and maintain automated test cases for web and API testing Execute functional, regression, integration, and performance tests Collaborate closely with developers and product managers to ensure quality from day one Detect, report, and track software bugs using issue tracking tools Contribute to improving QA processes, test strategy, and automation frameworks Write clear and concise test plans, test cases, and test documentation Ensure that every release meets our quality standards and user expectations

Requirements

3+ years of experience in Software Quality Assurance or Test Automation Strong understanding of QA methodologies, testing types, and best practices Hands-on experience with automation tools like Selenium, Playwright, Cypress, or similar Familiarity with programming/scripting languages (e.g., JavaScript, Python, or Java) Knowledge of REST APIs and API testing tools like Postman or REST Assured Experience with bug tracking tools (e.g., Jira) and version control (e.g., Git) Excellent attention to detail and strong problem-solving skills Ability to work from our Coimbatore office full-time

Nice-to-Haves

Experience with CI/CD pipelines and integrating tests into automated workflows Familiarity with performance or load testing tools (e.g., JMeter, k6) Exposure to agile methodologies and working in cross-functional teams Knowledge of mobile application testing (iOS/Android)

Why Join Us?

At our company, QA is not an afterthought — it’s a core part of our engineering culture. You'll have the opportunity to take ownership of testing strategy, work alongside passionate developers, and help build software that users love and trust. We're a close-knit team focused on doing great work, learning continuously, and growing together — all from our Coimbatore office.

If interested please apply on ( https://candidate.hirezy.ai/job/12ORRzQ)

Responsibilities:

• Participate in the development and support of the .NET applications across diverse technology stacks.
• Independently maintain, troubleshoot, and enhance legacy .NET applications
• Build and Enhance applications using Latest .NET Technologies using Microservices architecture
• Deploy application fixes using Devops pipeline using GitHub actions and other CI tools
• Investigate and fix bugs, optimize performance, and ensure system reliability.
• Implement enhancements to meet customer needs while maintaining backward compatibility.
• Support data migration and customer transition to a cloud-based product.
• Collaborate with product, support, and operations teams to ensure a stable and effective product experience.
• Provide long-term technical support and modernization recommendations where appropriate.

Skills Required

• Proven experience working with legacy and Modern.NET applications (C# .NET, ASP.NET, Web Services, Microservices, Entity Framework, XML, Json).
• Hands-on experience with .NET, JavaScript, HTML5 and Angular is Mandatory.
• Comfortable working with older codebases and understanding existing system logic.
• Experience with SQL Server (stored procedures, optimization, and maintenance).
• Willingness to focus on support, maintenance, and incremental improvements rather than greenfield development.
• Strong problem-solving skills and a practical approach to software maintenance.
• Strong debugging skills and the ability to diagnose and resolve production issues efficiently.
• Prior experience with enterprise or long-standing software products is a plus.
• Must be detail-oriented, patient, and committed to long-term product stability.
• Experience with upgrading legacy applications to adhere to modern, up-to-date development standards is a bonus

Flexible to work in EST or Pacific Time Zone

Are you a driven React Native Full Stack Mobile Developer looking for your next challenge?

We area a growing global technology partner is looking for a skilled React Native Full Stack Mobile Developer to join their Technology and Development team.

If you're eager to showcase your expertise and collaborate with a talented group of engineers, this role is perfect for you!

We stand at the forefront of technology innovation, catering cutting-edge solutions to clients spanning diverse sectors. With a strategic emphasis on finance, banking, and corporate verticals, they're known for their excellence in delivery. We are seeking a senior developer to join their global projects team.

About the position.

The Senior React Native Full Stack Mobile Developer candidate will have a strong background in building mobile applications and will be proficient in front-end (React Native) and back-end development.

In addition to technical expertise, the candidate should have experience in testing, browser testing, and thorough documentation practices.

As a senior member of the mobile development team, you will play a critical role in designing, developing, and maintaining mobile applications that provide exceptional user experiences.

Key Responsibilities:

• Mobile Application Development: Design, develop, and maintain mobile applications using React Native for iOS and Android platforms.
• Full Stack Development: Work on both the front-end and back-end components of mobile applications, including server-side development using Azure (or other Cloud Platforms) and MongoDB (or other relevant experience)
• Testing and Quality Assurance: Develop and execute comprehensive test plans, including unit testing, integration testing, and browser testing, to ensure the reliability and functionality of mobile applications.
• Cross-Browser Compatibility: Conduct cross-browser testing to ensure consistent functionality and appearance of web-based components.
• Documentation: Create and maintain detailed technical documentation, including code comments, API documentation, and development guides.
• Code Review and Collaboration: Collaborate with team members to conduct code reviews, provide constructive feedback, and ensure code quality and consistency.
• Performance Optimization: Identify and address performance bottlenecks in mobile applications and back-end services to optimize speed and responsiveness.
• Security and Data Protection: Implement security measures and best practices to protect user data and maintain compliance with data protection regulations.
• Scalability and Maintenance: Design systems and architectures that are scalable and maintainable as applications grow and evolve.
• Stakeholder Communication: Collaborate with cross-functional teams and effectively communicate technical concepts to non-technical stakeholders.

Qualifications:

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
• Proven 3+ years experience as a Mobile Developer with expertise in React Native for mobile application development both with iOS and Android platforms.
• Full stack development experience, including back-end development using Azure and MongoDB.
• Proficiency in front-end technologies, including HTML, CSS, and JavaScript.
• Strong testing skills, including unit testing, integration testing, and browser testing.
• Extensive experience in mobile application design and development.
• Solid understanding of cross-browser compatibility and responsive design principles.
• Thorough documentation practices and ability to create technical documentation.
• Excellent problem-solving and analytical skills.
• Strong communication and collaboration skills to work effectively in a distributed team-oriented environment.
• Commitment to security and data protection best practices.

We offer an exciting and professional environment with excellent career and growth opportunities. They provide their team members with a professional work environment with regular team outings. Their office is located in the heart of Salt Lake Sector V, Kolkata offering a terrific workspace that's both accessible and inspiring. Joining the team means becoming part of this vibrant and dynamic team where your skills will be valued, your creativity will be nurtured, and your contributions will make a difference. In this role, you can work alongside some of the brightest minds in the industry.

Onsite Office Location: Kolkata, India (Salt Lake, Sector V)

1. 6 months to 4 years hands on experience of PHP Laravel framework. 
2. Candidates from Gujarat can apply.

3. Candidates can also apply if willing to relocate.

4. 5 days working from office only.

Overview: 

• Design and develop Rest APIs. 
• Create documentation around processes including front-end design and service architecture. 
• Follow industry trends regarding backend-end technologies and techniques. 
• Agile rituals like Feature elaboration/Estimation, daily stand-ups, release planning, Iteration Planning Meeting, Retrospective, Showcase, etc. 
• Build content and data driven enterprise level web application which works for Multiple clients in multiple countries. 

Relevant experience and Exposure: 

• 1+ years relevant work experience showing growth as a Backend developer. 
• Extensive technical experience and development expertise in C#, .Net core, Web services (REST) 
• Proficient with OOPS and Design principles. 
• Expertise in writing clean, secure and refactored code. 
• Knowledge and hands-on Experience with Test Driven Development. 
• Experience with relational and non-relational Database technologies like SQL, MongoDB. 
• Proficient with Git or any source code management tool. 
• Excellent listening, writing skills and strong technical competency are essential. 
• Creative and efficient in proposing solutions to complex, time-critical problems. 
• Strong analytical and problem-solving skills with a high attention to detail. 

Nice to haves: 

• Experience with .Net core. 
• Experience with public cloud offerings (AWS, Azure etc.). 
• Knowledge of CI/CD tools like Jenkins, Docker, Spinnaker etc. 
• Exposer to an Agile Development Methodology would be beneficial. 
• Atlassian suit knowledge (Jira particular). 

What you need to have: