Senior Full Stack UI Engineer (5+ Years in React.js, TypeScript/JavaScript and RESTful APIs)

📍 Job Overview

Job Title: Senior Full Stack UI Engineer

Company: FIS Global

Location: Pune City, Maharashtra, India

Job Type: Full-time

Category: Software Engineering / Full Stack Development

Date Posted: 2026-08-19

Experience Level: 5-10 Years

Remote Status: On-site

🚀 Role Summary

• Design, develop, and enhance scalable web applications that deliver exceptional user experiences and support critical business outcomes in the fintech sector.

• Collaborate with product, user experience, engineering, and architecture teams to build modern, secure, and high-performing full stack solutions.

• Drive architectural decisions and contribute to the continuous evolution of engineering standards and best practices, leveraging expertise in React.js and TypeScript.

• Integrate and develop RESTful APIs, ensuring robust backend service functionality and optimal application performance.

• Implement secure authentication, authorization, and data protection practices across all developed applications.

📝 Enhancement Note: While the title specifies "UI Engineer," the responsibilities and required qualifications clearly indicate a Full Stack role with a strong emphasis on front-end development using React.js and TypeScript, but also encompassing backend API integration and database interaction. The "5+" years of experience in the title directly translates to the "5-10 Years" experience level and the detailed requirements.

📈 Primary Responsibilities

• Design and develop responsive, scalable web applications using modern front-end technologies and frameworks, with a primary focus on React.js and TypeScript.

• Partner with product and user experience teams to translate complex business requirements into intuitive, user-centered digital experiences.

• Drive application architecture, technical design, and development best practices for both front-end and full stack solutions.

• Build reusable, maintainable UI components and libraries that enhance development efficiency and ensure consistency across the application suite.

• Develop and integrate RESTful APIs and backend services to support application functionality, data retrieval, and overall system performance.

• Optimize application performance through effective caching strategies, proactive monitoring, and a commitment to continuous improvement initiatives.

• Implement and enforce secure authentication, authorization, and data protection mechanisms across all layers of the application.

• Collaborate effectively with cross-functional teams, including QA, DevOps, and Product Management, to resolve technical challenges and deliver high-quality software solutions on time.

• Support production environments through diligent troubleshooting, root cause analysis, and proactive continuous enhancement initiatives.

• Contribute to robust code reviews, sophisticated testing strategies, comprehensive documentation, and active knowledge sharing within the engineering organization.

📝 Enhancement Note: The primary responsibilities are derived directly from the provided job description, enhanced with operations-relevant terminology like "scalable web applications," "business outcomes," "user-centered design," "application architecture," "RESTful APIs," "performance optimization," "secure authentication," and "cross-functional teams." This aligns with the expectations for a senior-level engineer contributing to GTM enablement through robust application development.

🎓 Skills & Qualifications

Education: While not explicitly stated, a Bachelor's degree in Computer Science, Software Engineering, or a related field is typically expected for a Senior Engineer role. Equivalent practical experience will also be considered.

Experience: Minimum of 5 years of professional experience in full stack web application development, with a significant focus on front-end technologies.

Required Skills:

• Demonstrated 5+ Years of professional experience developing modern web applications using React.js and TypeScript/JavaScript.

• Strong understanding of user-centered design principles and best practices in front-end application development.

• Expertise in designing scalable, maintainable, and high-performing software architectures for complex systems.

• Proven experience building and consuming RESTful APIs and integrating distributed services effectively.

• Solid knowledge of authentication protocols (e.g., OAuth, JWT), application security principles, and secure coding practices.

• Experience working with relational databases such as PostgreSQL, Oracle, or similar technologies, including schema design and query optimization.

• Proficiency in software development lifecycle (SDLC) practices, including agile methodologies, testing, code reviews, and CI/CD workflows.

• Strong analytical, problem-solving, communication, and collaboration skills, with the ability to influence technical decisions among peers and stakeholders. Preferred Skills:

• Experience with Angular or additional modern front-end frameworks to demonstrate adaptability and broader technical understanding.

• Experience with Node.js and backend frameworks such as Express, showcasing full-stack capabilities.

• Knowledge of functional programming concepts and associated frameworks, enhancing code efficiency and maintainability.

• Experience developing and supporting Software-as-a-Service (SaaS) platforms, understanding multi-tenancy and scalability challenges.

• Experience with front-end build tools (e.g., Webpack, Vite), automation scripts, and DevOps tooling (e.g., Docker, Kubernetes).

• Hands-on experience with various testing frameworks, including unit, integration, and end-to-end (E2E) testing suites.

📝 Enhancement Note: The required and preferred skills are directly extracted from the job description. The "5+" years of experience in the title and description is translated into the "5-10 Years" experience level. The education requirement is inferred based on industry standards for senior engineering roles.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase of at least two complex web applications developed using React.js and TypeScript, demonstrating end-to-end development lifecycle experience.

• Examples of RESTful API design and integration, highlighting data modeling, endpoint definition, and consumption logic.

• Demonstrations of responsive design implementation and performance optimization techniques applied to user interfaces.

• Inclusion of projects that involved database interaction (e.g., PostgreSQL, Oracle), illustrating schema design and query efficiency.

• Evidence of security best practices implemented, such as secure authentication flows and data protection measures. Process Documentation:

• Detailed descriptions of the software development lifecycle (SDLC) processes followed, including agile methodologies, sprint planning, and retrospectives.

• Documentation of CI/CD pipelines implemented, outlining build, test, and deployment automation strategies.

• Examples of code review processes and standards, emphasizing code quality, maintainability, and collaboration.

• Case studies detailing performance monitoring and optimization efforts, including metrics and improvements achieved.

📝 Enhancement Note: This section infers typical portfolio requirements for a Senior Full Stack UI Engineer. The emphasis is on demonstrating practical application of the required skills, particularly in areas like React.js development, API integration, and adherence to SDLC and CI/CD best practices, which are critical for operations-focused roles that rely on robust software.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Senior Full Stack UI Engineers with 5+ years of experience in Pune, India, the estimated annual salary range is ₹15,00,000 to ₹25,00,000 (Indian Rupees). This range accounts for the specified experience level, technical expertise in React.js, TypeScript, and RESTful APIs, and the company's position in the fintech sector.

Benefits:

• Competitive salary and comprehensive benefits package.

• Opportunities for personal and professional learning and development, including access to training resources and industry conferences.

• Inclusive and diverse work environment that fosters collaboration and innovation.

• Resources and opportunities to give back to the community.

• Potential for career advancement within FIS Global's global operations.

Working Hours: Typically 40 hours per week, with standard business hours observed in Pune, India (Asia/Kolkata timezone). Flexibility may be offered based on project needs and team agreements, but the role is designated as on-site.

📝 Enhancement Note: The salary range is an estimation based on publicly available data for similar roles in Pune, India, considering the specified experience and technology stack. The benefits listed are directly from the provided job description. The working hours are inferred from the "Full-time" employment type and the "On-site" work arrangement.

🎯 Team & Company Context

🏢 Company Culture

Industry: Financial Technology (Fintech). FIS Global is a major player in providing technology solutions that power the global economy, serving financial institutions worldwide. This industry context means a focus on security, scalability, regulatory compliance, and innovation.

Company Size: FIS Global is a large enterprise company. This implies structured processes, established career paths, and a wide range of potential projects and technologies to work with. For operations professionals, this often means opportunities to work on large-scale systems and contribute to significant business impact.

Founded: Founded in 1968, FIS Global has a long history and extensive experience in the financial services technology sector, indicating stability, deep industry knowledge, and a well-established market presence.

Team Structure:

• The engineering team is likely structured into specialized groups, with this role belonging to a team focused on front-end or full-stack development of web applications.

• Reporting structure will typically involve a Team Lead or Engineering Manager, with potential for matrixed reporting for project-specific work.

• Cross-functional collaboration is a key aspect, involving close partnerships with Product Management, UX/UI Design, QA, and DevOps teams to ensure cohesive product delivery. Methodology:

• Data-driven development and decision-making are paramount in fintech, requiring engineers to leverage analytics to understand user behavior and application performance.

• Agile methodologies (Scrum, Kanban) are likely employed for iterative development, emphasizing flexibility, continuous feedback, and rapid response to market changes.

• Workflow optimization and automation are critical for efficiency, especially in CI/CD pipelines and testing, to ensure rapid and reliable deployments.

Company Website: https://careers.fisglobal.com/us/en

📝 Enhancement Note: Company culture and team structure are inferred from the company's size, industry (Fintech), and the nature of a Senior Full Stack UI Engineer role within such an organization. The emphasis is on how these factors impact operations professionals seeking roles.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior-level position, indicating a role that requires significant technical expertise, independent problem-solving, and the ability to mentor junior engineers. It sits above mid-level roles and below lead or architect positions, focusing on hands-on development and technical design with a degree of autonomy.

Reporting Structure: The role reports to an Engineering Manager or Team Lead. Collaboration will be extensive with peers within the engineering team, as well as with Product Managers, UX Designers, and QA Engineers.

Operations Impact: As a Senior Full Stack UI Engineer, the impact is direct on the user experience and functionality of critical financial applications. By building robust, secure, and performant interfaces and APIs, this role directly contributes to customer satisfaction, operational efficiency, and the overall success of FIS Global's product offerings, which in turn support the global economy.

Growth Opportunities:

• Technical Specialization: Deepen expertise in React.js, TypeScript, or explore adjacent areas like backend development (Node.js), cloud technologies (AWS, Azure), or specialized frontend architecture.

• Leadership Development: Transition into roles such as Tech Lead, Engineering Lead, or Architect, guiding technical strategy and mentoring teams. Opportunities may arise to manage small teams or projects.

• Cross-functional Mobility: Develop skills in areas like DevOps, SRE, or Product Management by leveraging a strong understanding of the full software development lifecycle and business requirements.

📝 Enhancement Note: Career progression and growth opportunities are extrapolated based on the "Senior" title and the typical career ladders within large enterprise technology companies like FIS Global, focusing on how a software engineering role contributes to broader operational goals.

🌐 Work Environment

Office Type: The role is designated as "On-site," indicating a traditional office-based work environment within FIS Global's Pune, India location. This suggests a collaborative atmosphere with direct interaction among team members.

Office Location(s): Pune City, Maharashtra, India. This location is a major IT and business hub in India, offering access to talent and infrastructure.

Workspace Context:

• The workspace will likely be a modern office environment equipped with standard amenities, designed to foster collaboration.

• Access to necessary development tools, high-speed internet, and potentially specialized hardware will be provided.

• Opportunities for in-person collaboration with colleagues, including pair programming, team meetings, and informal discussions to solve technical challenges and share knowledge.

Work Schedule: Standard full-time working hours are expected, aligning with the Pune business day. While the role is on-site, there may be some flexibility for occasional remote work or adjusted hours depending on team policies and project demands, though the primary expectation is office presence.

📝 Enhancement Note: The description of the work environment is based on the "On-site" designation and the typical setup of large technology companies in major Indian cities. The focus is on how this environment supports the day-to-day operations of a software engineer.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will conduct an initial call to assess basic qualifications, experience, and cultural fit.

• Technical Assessment: This may involve a coding challenge (live or take-home) focusing on React.js, TypeScript, and problem-solving skills. Alternatively, a technical interview with senior engineers will delve into architectural design, API integration, and core JavaScript/TypeScript concepts.

• System Design/Architecture Interview: A discussion focused on designing scalable, maintainable, and secure web applications, likely involving whiteboard sessions or detailed explanations of past projects.

• Behavioral Interview: Questions assessing collaboration, leadership potential, conflict resolution, and alignment with FIS Global's values.

• Final Interview: A meeting with a hiring manager or senior leadership to discuss career goals, overall fit, and confirm the offer.

Portfolio Review Tips:

• Curate Key Projects: Select 2-3 of your most impactful projects that best showcase your React.js, TypeScript, and full-stack capabilities. Prioritize projects with clear business objectives and demonstrable results.

• Highlight Technical Depth: For each project, be prepared to discuss your specific contributions, the architectural decisions you made, the challenges you overcame, and the technologies used (especially React.js, TypeScript, APIs, databases).

• Quantify Impact: Whenever possible, use metrics to demonstrate the success of your work. This could include improvements in application performance, user engagement, development efficiency, or reduction in bugs.

• Showcase API Integration: Clearly explain your role in designing or consuming RESTful APIs, including details on data structures, authentication mechanisms, and error handling.

• Emphasize Process: Be ready to articulate your understanding of SDLC, Agile methodologies, CI/CD, and testing strategies as applied to your projects.

Challenge Preparation:

• Practice Core Algorithms & Data Structures: Brush up on fundamental computer science concepts, as these are often tested in coding challenges.

• Master React.js & TypeScript: Practice building complex UIs, managing state effectively, and writing robust TypeScript code. Understand hooks, context API, and component lifecycle.

• API Design & Consumption: Be prepared to design simple RESTful APIs and demonstrate how to consume them effectively within a React application.

• System Design Scenarios: Practice designing scalable systems for common use cases, considering aspects like database choice, caching, load balancing, and security.

📝 Enhancement Note: The interview process and portfolio review tips are tailored for a Senior Full Stack UI Engineer role, emphasizing the technical skills required by FIS Global and providing actionable advice for candidates to present their qualifications effectively.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend Framework: React.js (primary), potentially Angular (preferred).

• Languages: TypeScript, JavaScript.

• Backend Integration: RESTful APIs.

• Databases: Relational databases such as PostgreSQL, Oracle.

• Version Control: Git.

Analytics & Reporting:

• Monitoring Tools: Tools for application performance monitoring (APM) and frontend error tracking (e.g., Datadog, Sentry, New Relic).

• Analytics Platforms: Potentially Google Analytics, Adobe Analytics, or internal analytics solutions for tracking user behavior and application usage.

• Dashboarding: Tools for creating dashboards and visualizing data (e.g., Tableau, Power BI, Grafana) might be used by related teams.

CRM & Automation:

• CI/CD Tools: Jenkins, GitLab CI, GitHub Actions, Azure DevOps for build, test, and deployment automation.

• Build Tools: Webpack, Vite, Babel for frontend asset bundling and transpilation.

• Containerization: Docker for creating consistent development and deployment environments.

• Orchestration: Kubernetes might be used for managing containerized applications at scale.

📝 Enhancement Note: The tools and technology stack are inferred from the job description's requirements (React.js, TypeScript, JavaScript, RESTful APIs, PostgreSQL, Oracle) and common practices for senior full-stack engineers in large enterprise environments, particularly in fintech where robust tooling is essential.

👥 Team Culture & Values

Operations Values:

• Innovation: A drive to develop cutting-edge solutions that power the global economy, fostering a culture of continuous improvement and creative problem-solving.

• Customer Focus: A strong emphasis on understanding and meeting client needs, translating them into intuitive and high-performing digital experiences.

• Integrity & Security: Paramount importance placed on data protection, secure coding practices, and maintaining the trust of financial institutions and their customers.

• Collaboration & Teamwork: Encouraging a supportive environment where engineers work together, share knowledge, and contribute to collective success.

• Excellence & Quality: A commitment to delivering high-quality, scalable, and maintainable software through rigorous standards and best practices.

Collaboration Style:

• Cross-functional Integration: Engineers are expected to work closely with Product Managers, UX Designers, QA testers, and potentially DevOps/SRE teams, fostering a holistic approach to product development.

• Open Communication: A culture that values clear, concise, and honest communication, encouraging feedback exchange during code reviews, design discussions, and team meetings.

• Knowledge Sharing: Active participation in sharing technical expertise through documentation, internal presentations, and mentoring junior team members to elevate the overall capability of the engineering organization.

📝 Enhancement Note: The team culture and values are inferred from FIS Global's industry (Fintech), company description, and the typical expectations for senior engineering roles within large, established technology firms. The focus is on how these values translate into daily work for an operations-focused engineer.

⚡ Challenges & Growth Opportunities

Challenges:

• Scalability & Performance: Designing and implementing solutions that can handle high transaction volumes and a growing user base, common in fintech.

• Security & Compliance: Adhering to stringent security protocols and regulatory requirements inherent in the financial services industry.

• Legacy System Integration: Potentially integrating modern applications with existing, older systems, requiring careful planning and robust API design.

• Rapid Technological Evolution: Staying current with fast-paced advancements in frontend technologies, frameworks, and development practices to maintain competitive advantage.

Learning & Development Opportunities:

• Advanced Technical Training: Access to courses, workshops, and certifications in areas like advanced React patterns, TypeScript best practices, cloud architecture, and cybersecurity.

• Industry Conferences & Events: Opportunities to attend leading fintech and software development conferences to gain insights into emerging trends and network with peers.

• Mentorship Programs: Participation in formal or informal mentorship programs, either as a mentee to learn from experienced leaders or as a mentor to guide junior engineers.

• Exposure to Diverse Projects: Working on a variety of projects across different product lines within FIS Global, allowing for broad exposure to different technical challenges and business domains.

📝 Enhancement Note: Challenges and growth opportunities are extrapolated based on the role's senior level, the fintech industry, and the typical offerings of large technology companies. The focus is on how these challenges can be viewed as opportunities for professional development.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex web application you designed and built using React.js and TypeScript. What were the key architectural decisions, and what challenges did you face?" (Focus on demonstrating end-to-end ownership, technical depth, and problem-solving).

• "How do you ensure the security and performance of your web applications? Walk me through your process for integrating and consuming RESTful APIs securely." (Highlight knowledge of security protocols, authentication, API design, and performance optimization techniques).

• "Tell me about a time you had to influence technical decisions within your team or with stakeholders. How did you approach it, and what was the outcome?" (Showcase communication, persuasion, and leadership skills). Company & Culture Questions:

• "What interests you about FIS Global and the fintech industry, particularly our role in powering the global economy?" (Demonstrate research into the company and genuine interest in the sector).

• "How do you approach collaboration with product managers and UX designers to translate business requirements into technical solutions?" (Illustrate your understanding of cross-functional teamwork and user-centric development).

• "Given FIS Global's focus on security and compliance, how would you ensure your development practices align with these critical requirements?" (Show your awareness of industry-specific challenges and your commitment to best practices). Portfolio Presentation Strategy:

• Structured Walkthrough: For each project, provide a brief overview, your specific role, the problem solved, the technical solution (highlighting React.js, TypeScript, APIs), and the quantifiable results.

• Interactive Demonstration: If possible, offer a live demo of a relevant feature or a well-documented deployment.

• Focus on Process: Be prepared to discuss your SDLC, testing strategies, and how you incorporated feedback and iterative improvements.

• Adapt to Audience: Tailor your explanations to the interviewer's technical background, focusing on aspects most relevant to their team and the role.

📝 Enhancement Note: Interview preparation advice is crafted to address the specific technical requirements (React.js, TypeScript, APIs, security) and the industry context (fintech, large enterprise) of the FIS Global Senior Full Stack UI Engineer role.

📌 Application Steps

To apply for this Senior Full Stack UI Engineer position:

• Submit your application through the provided link on the FIS Global careers portal.

• Tailor Your Resume: Highlight your 5+ years of experience with React.js, TypeScript, JavaScript, and RESTful APIs. Quantify achievements with metrics related to application performance, scalability, or development efficiency.

• Prepare Your Portfolio: Select 2-3 key projects that demonstrate your full-stack capabilities, focusing on UI development, API integration, and database interaction. Be ready to discuss your design decisions and the technical challenges you overcame.

• Practice Technical Scenarios: Review common coding challenges, system design questions, and behavioral interview questions relevant to senior engineering roles. Prepare to articulate your problem-solving approach and technical rationale.

• Research FIS Global: Understand the company's mission, values, and its position in the fintech industry. Familiarize yourself with their product offerings and how this role contributes to their overall business strategy.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.