Senior Node.js Backend Engineer (8+ Years)
Resume:
SATHISH GILAKATHULA
******@******************.***
Sr Full stack engineer (Node.js) Backend Engineer
PROFESSIONAL SUMMARY
•Senior Software Engineer with 8+ years of experience designing, building, and operating high-scale backend platforms using Node.js (TypeScript/JavaScript) and Java in cloud-native environments.
•Proven expertise in developing mission-critical RESTful APIs supporting large enterprise platforms in retail, finance, and aviation, serving high-volume, latency-sensitive workloads.
•Strong background in distributed systems design, including stateless services, asynchronous processing, concurrency control, and fault-tolerant architectures.
•Extensive experience with authentication and authorization mechanisms, including JWT-based security, session management, role-based access control, and secure API design.
•Hands-on experience operating services in AWS and Azure, leveraging API Gateway, Lambda, IAM, CloudWatch, Azure Functions, and API Management for scalable identity-aware systems.
•Deep proficiency in Node.js backend frameworks such as Express, Fastify, and serverless architectures using the Serverless Framework and Terraform.
•Strong data-layer expertise across MongoDB, PostgreSQL, DynamoDB, Oracle, and SQL Server, with a focus on schema design, indexing, performance tuning, and transactional integrity.
•Demonstrated ability to modernize legacy monolithic systems by migrating Java-based applications to Node.js microservices, improving scalability, maintainability, and deployment velocity.
•Experienced in building high-availability platforms, implementing caching, rate limiting, health checks, and proactive monitoring to ensure system reliability.
•Production-focused engineer with extensive experience in observability and performance tuning, using Datadog, CloudWatch, New Relic, and distributed tracing.
•Strong commitment to engineering quality, with hands-on experience in unit, integration, and functional testing, and supporting UAT and production validation.
•Adept at working in remote, distributed teams, collaborating closely with Product, Security, QA, and Architecture stakeholders in agile environments.
•Experienced in CI/CD automation, using Azure DevOps, Jenkins, GitHub/GitLab, Artifactory, and infrastructure-as-code to enable safe, repeatable deployments.
•Skilled in designing and implementing event-driven systems using Kafka Streams, SQS, SNS, and Event Bridge, enabling real-time data processing and decoupled service communication across distributed platforms.
•Strong advocate for API design best practices, including versioning strategies, OpenAPI/Swagger documentation, contract-first development, and consistent error-handling patterns to ensure maintainability and seamless developer onboarding.
•Capable of bridging backend and frontend concerns, with hands-on experience building client-facing interfaces using React.js, Vue.js, and AngularJS, ensuring seamless API integration and cohesive end- to-end user experiences.
•Proven ability to mentor junior and mid-level engineers, conduct code reviews, establish coding standards, and drive adoption of automated testing practices to elevate team-wide engineering quality and velocity.
•Track record of identifying infrastructure inefficiencies and implementing targeted optimizations — including serverless migration, query tuning, and caching strategies — resulting in significant reductions in cloud spend and response latency.
•Hands-on experience building AI-powered applications and intelligent agents using OpenAI APIs, prompt engineering, and LLM integration patterns, embedding generative AI capabilities into production backend services and internal tooling.
•Early adopter of AI-assisted development (Vibe coding) using Github Copilot and Cursor IDE, leveraging LLM-powered code generation, refactoring, and debugging to accelerate feature delivery by 2–3x while maintaining high code quality and test coverage.
•Proficient in prompt engineering and AI pair-programming workflows, using Claude and Cursor to rapidly prototype APIs, generate boilerplate, write comprehensive test suites, and perform intelligent code reviews — significantly reducing development cycle times.
TECHNICAL SKILLS
Category
Skills / Technologies
Programming Languages
JavaScript (Node.js), TypeScript, Java, Go, SQL
Backend & API Development
Node.js, Express.js, Fastify.js, Spring Boot, Apache Camel, RESTful APIs, GraphQL, SOAP/WSDL, Microservices, Serverless APIs
Identity & Security
JWT Authentication, OAuth API Design, IAM, Role-Based Access Control, Session Management, Secure API Development
Frontend Technologies
React.js, Vue.js, AngularJS, HTML5, CSS3, Bootstrap, jQuery
Cloud & Infrastructure
AWS (Lambda, API Gateway, EC2, CloudWatch, IAM, SQS, SNS, Event Bridge), Azure (Functions, API Management, Service Bus), Terraform, Docker, Kubernetes
Databases & Storage
MongoDB, PostgreSQL, DynamoDB, Oracle, SQL Server, MySQL
DevOps & CI/CD
Azure DevOps, Jenkins, Git, GitHub, GitLab, Artifactory, Serverless Framework
Monitoring & Observability
Datadog, Splunk, New Relic, Dynatrace, Grafana, CloudWatch, Distributed Tracing, Performance Tuning
Development Tools
VS Code, Eclipse, Cursor, Github Copilot, Postman, Swagger UI, Maven
Methodologies
Agile / Scrum, CI/CD, Test-Driven Development (TDD), Design Patterns, SOLID Principles
EMPLOYMENT HISTORY — KEY RESPONSIBILITIES
Sr Full Stack Engineer
Walmart Sunnyvale, CA Oct 2022 — Present
Retail / Last-Mile Delivery — Driver Management & Partner Portal Platform
•Architected and deployed 15+ production-grade RESTful APIs using Java/Spring Boot and Node.js/TypeScript, processing 500K+ daily transactions across Driver Management Systems and Partner Portal integrations serving Walmart’s last-mile delivery ecosystem.
•Designed and implemented Modernized Driver Transport Experience APIs on Azure Cloud, scaling peak traffic handling to 1M+ requests/day while reducing average response time by 42% through asynchronous processing and connection pooling.
•Re-engineered insurer-verification scheduler from a cron-every-second polling model to event-driven SQS-triggered Azure serverless functions, eliminating redundant invocations and slashing CloudWatch costs by 70%.
•Built real-time fraud-detection microservice leveraging Kafka Streams and complex event processing, flagging 98% of fraudulent driver accounts within 5 seconds and preventing an estimated $2M+ in annual losses.
•Implemented end-to-end CI/CD pipelines using Jenkins/Groovy scripts and Azure DevOps, reducing deployment cycle time by 60% and enabling automated testing gates across development, staging, and production environments.
•Introduced distributed tracing with New Relic and Grafana dashboards, combined with Datadog and Splunk alerting, reducing mean-time-to-resolution (MTTR) from 90 minutes to 15 minutes across all API services.
•Orchestrated GitHub-based source control workflows with automated code reviews, branch protection policies, and PR-based quality gates integrated with Jenkins for continuous delivery of mission-critical API services.
•Established comprehensive unit and integration testing frameworks achieving 85%+ code coverage using Jest and JUnit, collaborating with QA teams to implement automated regression scripts prior to every deployment.
•Engineered scalable claims adjudication API workflows using Spring Boot and Node.js, enabling real- time driver onboarding, status validation, and operational workflows consumed by multiple internal Walmart systems.
•Mentored 2 junior engineers on clean code practices, design patterns, and TDD methodology, fostering a culture of engineering excellence and elevating team-wide code quality.
•Supported full SDLC testing phases including functional, integration, and user acceptance testing (UAT), ensuring API services met strict acceptance criteria, SLA targets, and compliance requirements.
•Leveraged Artifactory for dependency management and build artifact versioning, enforcing reproducible builds and secure supply chain practices across all microservice deployments.
Sr Full Stack Engineer
United Airlines Chicago, IL Apr 2021 — Oct 2022
Aviation / Enterprise Integration — STM Modernization
•Designed and implemented SOAP/REST web services with comprehensive XSD/WSDL schema definitions and JSON Schema validation, ensuring data integrity.
•Developed serverless API architecture on AWS (API Gateway, Lambda) with IAM-based security controls, achieving 99.9% uptime and sub-200ms response times for the STM modernization initiative.
•Built scalable client-side solutions with Node.js/TypeScript, integrating ReactJS components into the airline’s operational dashboards for real-time flight and crew management visibility.
•Optimized database queries and API response times through functional analysis, query plan optimization, and concurrency management, improving system throughput by 35% while maintaining ACID-compliant data consistency.
•Deployed APIs on AWS using the Serverless framework with Terraform-managed infrastructure-as-code, enabling repeatable, version-controlled deployments across multiple environments.
•Implemented CI/CD pipelines with Jenkins, optimizing build processes with parallelized stages and ensuring seamless integration with artifact repositories and automated test suites.
•Managed artifact repositories using Artifactory for dependency management and build optimization, establishing version control standards and automated deployment workflows across the engineering organization.
•Partnered with Tech Leads and cross-functional teams during Agile sprint ceremonies to decompose complex integration requirements into actionable stories, consistently delivering within 2-week sprint cycles.
•Conducted technical code reviews and provided architectural recommendations to engineering teams, ensuring adherence to SOLID principles, design patterns, and API best practices.
•Designed automated monitoring systems using Datadog and Splunk with real-time alerting capabilities, identifying and resolving system bottlenecks proactively before production impact.
•Supported all phases of testing including functional, integration, and user acceptance testing (UAT), leveraging distributed tracing for enhanced observability and rapid root-cause analysis.
Sr Full Stack Engineer
Fidelity Investments Covington, KY Mar 2020 — Apr 2021
Financial Services — Legacy Modernization & Financial Data Ecosystem
•Led the migration of legacy Java-based applications to a Node.js/Express.js microservices architecture, refactoring monolithic components into lightweight, event-driven APIs that improved scalability by 3x and reduced deployment times from hours to minutes.
•Developed and deployed multiple serverless APIs on AWS Cloud using the Serverless framework, API Gateway, Lambda, CloudWatch, and IAM, supporting high-availability financial data workflows.
•Re-engineered existing Java REST services and database interactions into Node.js services, optimizing asynchronous processing with Promises and async/await patterns, reducing resource consumption by 40%.
•Designed and developed Single Page Applications (SPA) using React, integrating with backend RESTful services to deliver seamless user experiences for financial advisors and operations teams.
•Deployed and managed infrastructure using Terraform, implementing infrastructure-as-code practices that ensured consistent, auditable, and repeatable environment provisioning across dev, staging, and production.
•Utilized Apache Camel to streamline complex enterprise integration workflows, incorporating stored procedures and message routing patterns for optimized database operations in the financial data ecosystem.
•Worked with Oracle, SQL Server, and NoSQL databases (MongoDB, DynamoDB) to implement high- performance data access layers, optimizing query execution plans and implementing connection pooling for concurrent workloads.
•Incorporated Agile environment practices with 2-week sprint cadences, participating in daily standups, sprint planning, retrospectives, and backlog refinement to ensure continuous delivery of business value.
•Utilized STS and Eclipse IDEs for efficient development and debugging, leveraging Maven for dependency management and ensuring seamless integration with financial data ecosystems and compliance frameworks.
•Conducted functional analysis to optimize database performance, applying concurrency principles, indexing strategies, and caching mechanisms for enhanced scalability under peak trading loads.
Full Stack Engineer
7-Eleven Inc Dallas, TX Sep 2018 — Mar 2020
Retail / Convenience — Master Data & Promotional Services Platform
•Designed, developed, tested, and maintained production applications for One Promo and 7-Eleven Master Data teams, delivering microservices that supported real-time inventory and promotional data across 13,000+ stores.
•Implemented high-performance microservices using Fastify, TypeScript, and Node.js for Item General and Location Services, achieving sub-100ms response times through schema-based request validation with Joi.
•Developed backend services using Golang to build high-throughput CRUD API services, leveraging Go’s concurrency model for efficient parallel processing of bulk data operations.
•Developed and tested RESTful APIs with comprehensive schema validation, and implemented serverless applications using AWS Lambda and GraphQL for flexible, client-driven data querying.
•Built and deployed applications using Node.js, MongoDB, AWS, and Azure, utilizing Postman for API testing, New Relic for APM monitoring, and CloudWatch for infrastructure-level observability.
•Managed code repositories with GitHub and deployment pipelines with GitLab CI, enforcing branching strategies and automated quality gates for reliable release management.
•Optimized database queries through index tuning and query plan analysis, and created automated monitoring systems that proactively alerted administrators of potential issues before production impact.
Software Engineer
RIG Enterprise Applications Inc Dallas, TX Jul 2018 — Sep 2018
HR Technology — On-Blick
•Developed full-stack software applications for the in-house product on-Blick using Node.js and Express, delivering RESTful API services deployed on Azure Cloud for HR and immigration management workflows.
•Enhanced user experience with advanced jQuery, AJAX, JavaScript, and CSS implementations, creating responsive and interactive interfaces that improved user engagement and task completion rates.
•Strengthened application security by implementing JWT-based authentication and XML SOA integration, resolving critical authentication bugs and ensuring secure session management across the platform.
•Collaborated with cross-functional teams to identify, prioritize, and resolve defects, delivering measurable quality improvements and achieving a 30% reduction in reported bugs across release cycles.
Software Engineer
TUEchain INC Seattle, WA Jun 2018 — Jul 2018
Blockchain / Fintech — TUEchain Web & Mobile Application
•Designed and developed REST-based web services using Node.js with Swagger UI documentation, enhancing backend performance and enabling seamless API consumption by frontend and mobile clients.
•Built the TUEchain web application and mobile app using ReactJS, JavaScript, and CSS, implementing responsive front-end screens that integrated with REST APIs for real-time blockchain data display and interaction.
•Developed RESTful services that boosted backend efficiency and user engagement, implementing optimized data serialization and API response caching for improved client-side performance.
•Integrated Swagger UI for streamlined API documentation, enabling self-service onboarding for internal and external developers and reducing integration support requests.
Developer
Resource Informatic Group Inc Dallas, TX Aug 2017 — Jun 2018
Enterprise Consulting — Full-Stack Web Services & Data Management
•Designed and developed RESTful web services using Java Collections, Spring Boot, Hibernate ORM, and Node.js, building scalable backend systems that supported enterprise client data management workflows.
•Implemented Agile methodology with iterative sprint cycles, improving project delivery timelines by 25% and fostering cross-team collaboration through daily standups and retrospectives.
•Created interactive data grids with inline editing capabilities using AngularJS and Web API, boosting user engagement and enabling real-time data manipulation without page reloads.
•Enhanced applications using MVC architecture, Bootstrap for responsive design, and AngularJS for dynamic client-side rendering, resulting in measurably improved user experience across desktop and mobile.
•Managed database operations for optimal efficiency using AWS for microservices architecture, implementing connection pooling, query optimization, and automated backup strategies.
•Integrated Swagger UI for comprehensive RESTful API documentation, enabling developer self-service and reducing onboarding time for new team members.
EDUCATION
M.S. in Information Technology
Colorado Technical University Denver, CO Dec 2015 — Jul 2017
•Graduated with a Master of Science in Information Technology (GPA: 3.59/4.0), emphasizing advanced software development methodologies and achieving high-level proficiency in object-oriented programming.
B.Tech. in Information Technology
CVSR College of Engineering Hyderabad, India Sep 2011 — May 2015
•Graduated with a B.Tech. in Information Technology, emphasizing key areas such as Java, database management systems, and data mining.
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