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Laxman Sharma
Verified Expert in Engineering
Software Developer
Singapore, Singapore
Toptal member since September 12, 2018
Bio
Laxman is a full-stack developer and CTO with 10+ years of experience building scalable cloud-native applications across fintech, agritech, and enterprise SaaS. An expert in Java/Spring Boot, Python, Node.js, React, Next.js, AWS, and Kubernetes, he's led teams of up to 10, architected microservices handling high-volume financial transactions, and built products used by thousands. Laxman is proficient in the full development lifecycle, from ideation to production observability.
Portfolio
Singtel
Java, Kubernetes, Amazon Web Services (AWS), Docker, PostgreSQL, Spring Boot...
Freshokartz Agri Products
Python, Django, React, React Native, Amazon Web Services (AWS), Google Cloud...
Katherine Sylvester
AWS Amplify, React Native, Amazon Simple Notification Service (SNS), Full-stack...
Experience
- Amazon Web Services (AWS) - 11 years
- React - 10 years
- React Native - 8 years
- Java - 6 years
- Serverless - 3 years
- Spring Boot - 3 years
- Amazon API Gateway - 2 years
- AWS Lambda - 2 years
Preferred Environment
MacOS, Ubuntu, Sublime Text, Git, IntelliJ IDEA, JavaScript, CSS, Firebase, Android, APIs, API Integration, Flutter, iOS, Minimum Viable Product (MVP), Next.js, Claude Code, GitHub
The most amazing...
...app I've worked on is an in-house cloud-like service (like AWS, Azure) web application to reduce the time and cost spent in setting up the infrastructure.
Work Experience
Senior Software Developer
2023 - PRESENT
Singtel
- Architected Spring Boot payment processing and billing microservices for loyalty and financial transaction systems, improving API responsiveness and reliability across high-volume money movement flows.
- Led migration from monolith to Kubernetes on AWS, enabling horizontal scalability and high availability for mission-critical services.
- Implemented end-to-end production observability using OpenTelemetry, Prometheus, and Grafana for proactive incident detection and resolution across distributed services.
- Optimized back-end systems for memory and CPU efficiency, reducing latency and improving throughput for large-scale financial tracking workloads.
Technologies: Java, Kubernetes, Amazon Web Services (AWS), Docker, PostgreSQL, Spring Boot, Reactive Programming, CSS, Large Language Models (LLMs), APIs, API Integration, Next.js, Web Development
Chief Technology Officer
2020 - 2023
Freshokartz Agri Products
- Built the internal CRM application for all day-to-day operations for the sales, HR, accounts, and customer management departments.
- Worked alongside people in different areas: development, sales, data analysis, accounts, and call center teams. The interaction helped me plan and build solutions for all of them and increase the company's growth.
- Contributed to a mobile app for our employees in the field to perform their day-to-day operations, such as customer interaction, sales referral, and more. The app also uses a location-tracking system to monitor employee activity and manage expenses.
- Developed a mobile app for farmers to manage their farms. The app allows them to track their progress, recommends products for their crops, etc. Provided farmers with great educational content to improve their knowledge.
- Contributed to a real-time monitoring system that provides visibility to all key employees regarding sales, growth, customer retention, product demands, trends, company expenses, and location tracking of field employees in different areas.
- Improved the presence of Freshokartz in this ever-competitive market by working on a marketing website.
- Led a team of developers to work on different tech solutions provided in the agriculture space by Freshokartz. The role expectations included hiring, coaching, guiding, and leading the development throughout the organization.
Technologies: Python, Django, React, React Native, Amazon Web Services (AWS), Google Cloud, Redux, Android, Bootstrap 3, Java, Serverless, JavaScript, TypeScript, Full-stack, Amazon EC2, Amazon S3 (AWS S3), Amazon CloudWatch, AWS CloudFormation, HTML, Serverless Framework, React Apollo, CSS, Firebase, APIs, Next.js, Web Development
Full-stack React Native Developer
2022 - 2022
Katherine Sylvester
- Developed a mobile health application using react Native and AWS amplify to monitor patients with Alzheimer's or dementia.
- Used AWS amplify on the app and a carefully crafted architecture and data pipelines in S3, DynamoDB, and lambda functions.
- Integrated the data generated by the Apple Watch app to the mobile application to have S3 dynamo streams.
Technologies: AWS Amplify, React Native, Amazon Simple Notification Service (SNS), Full-stack, CSS, Android, APIs, Next.js, Web Development
Full-stack Developer
2022 - 2022
Queen Rania Foundation
- Worked on improving the analytics tool for an online learning platform to manage their employee skill learning; it involved B2B reporting and administration.
- Developed dashboards and data visualization to check progress and completion.
- Worked on end-to-end solutions using back-end APIs, a front-end UI, and automated cron jobs to achieve the desired goal.
Technologies: Django, Python 3, React, Celery, Kubernetes, Docker, MongoDB, MySQL, Workers, Full-stack, HTML, CSS, APIs, Web Development
Software Developer
2021 - 2021
RoomsToGo (via Toptal)
- Worked on improving the performance of the main website (www.roomstogo.com) using React hydration and improving React state management.
- Contributed to improving the user experience on different parts of the website like the product list and detail and the home page.
- Upgraded Gatsby v2 to Gatsby v3 for better static site generation.
- Worked on checkout-related issues to improve the user experience and ease the process.
Technologies: React, Gatsby, JavaScript, TypeScript, Full-stack, HTML, CSS, APIs, Performance Optimization, Web Development
Remote Developer
2020 - 2020
Sym Social
- Worked on a prototype for an application that helps social media campaign creators connect with brands and manage campaigns by leveraging blockchain.
- Developed a web application that can be used by campaign creators to manage and license their content like photos and so on.
- Delivered a pixel-perfect design and complete flow for both user roles for the MVP on time.
Technologies: Blockchain, Azure Blob Storage API, Styled-components, React, JavaScript, HTML, CSS, APIs
Software Developer
2019 - 2020
Booking.com
- Extended Booking.com's established systems to also allow apartments/home properties.
- Worked on implementing efficient solutions on Booking.com's main website and its partner website (property owners) to provide better content efficiently.
- Researched and analyzed different scenarios to understand what the guests need in order to increase the conversion rate for apartments/home properties on Booking.com's platform.
- Worked on various performance improvement, monitoring, and data gathering-related tasks during this period.
Technologies: Java, Perl, Python, Google Cloud, KVM, JavaScript, TypeScript, Full-stack, HTML, CSS, APIs
Software Developer
2019 - 2019
Zelos (via Toptal)
- Developed a platform for track and athlete coaches and teams to track their performance and improve over time.
- Built the front-end application using React Redux with Ducks architecture.
- Constructed the back end using Node.js and APIs which are served over GraphQL.
Technologies: Node.js, Redux, GraphQL, React, JavaScript, Full-stack, HTML, CSS, APIs
Full-stack Software Developer
2019 - 2019
Showcase
- Designed a platform for developers to showcase their skills and projects: Showcaseio.com.
- Built the project using serverless architecture on AWS.
- Created a back end that uses AWS Lambda, Edge optimized API Gateway, and Cognito.
- Built the front end using React and served from S3 using CloudFront and Route 53.
Technologies: Amazon Web Services (AWS), AWS Amplify, Serverless Architecture, AWS Lambda, React, Node.js, JavaScript, Full-stack, Amazon EC2, Amazon S3 (AWS S3), Amazon CloudWatch, AWS CloudFormation, HTML, Serverless Framework, CSS, APIs, Web Development
React Developer
2019 - 2019
EYN Vision Ltd.
- Implemented and managed multiple authentication flows using Google Firebase.
- Isolated authorization flows for different customers based on their requirements.
- Implemented Microsoft Azure SAML SSO authentication.
- Improved the existing authorization flow by making it easier to remember and reuse authentication details.
Technologies: SAML, Microsoft Azure, Firebase, React, JavaScript, HTML, CSS, APIs, Web Development
React Developer
2019 - 2019
Pathlight
- Worked on a marketing site for the company's product: Marketing.pathlight.com.
- Developed a static website using Gatsby and Contentful to easily manage and configure the content.
- Built a responsive website and progressive web app design for mobile.
- Performed SEO (search engine optimization) to increase the website's ranking.
Technologies: Contentful, Gatsby, GraphQL, React, JavaScript, HTML, Netlify, CSS, APIs, Web Development
Analyst
2018 - 2019
Credit Suisse
- Developed a web application for a client's onboarding, investment portfolio management, and routine workflows.
- Improved a client's onboarding process with automated checks for investment regulations that worked across different countries.
- Constructed a platform to assess the risk-taking ability of a client based on his previous investment record and preferences.
- Built a platform for investors to discover the most relevant fund types based on a client's investment record assessment, knowledge, experience, and preferences.
- Developed a platform to accommodate changing investment strategies and preferences via the use of surveys and questionnaires with the client regularly.
Technologies: Redux, React, PL/SQL, Oracle Database, GraphQL, Dropwizard, Java, JavaScript, Test-driven Development (TDD), HTML, CSS, APIs
Individual Contributor
2018 - 2018
Prosperoware
- Developed a serverless application hosted on Azure functions.
- Built an application that posts daily updates of issues from JetBrains YouTrack to their respective Microsoft team channels.
- Created a static website that was hosted on Azure Storage to allow users to configure it based on their requirements.
- Implemented CI/CD for the auto-deployment of all the functions from Git commits.
- Developed both HTTP and timer-triggered functions.
Technologies: React, Microsoft Azure, Node.js, JavaScript, HTML, CSS, APIs
R&D Software Developer
2015 - 2018
Works Applications
- Researched, designed, and implemented in-house solutions for all cloud services such as AWS and Azure.
- Created in-house services such as compute cloud, object storage, container management system, load balancer, on-demand environment, block storage, and so on.
- Developed web applications to support various operations such as installation, version up, migration, backup/restore, and more in production or evaluation environments.
- Designed the complete system's architecture and optimized the performance of deployments in production and evaluation landscapes using parallel programming.
- Automated an idempotent infrastructure to set up the production and evaluation environment with ease.
Technologies: Docker, Amazon Web Services (AWS), OpenStack, Ansible, Django, Python, Redux, React, Spring Boot, Java, JavaScript, Full-stack, Amazon EC2, Amazon S3 (AWS S3), Cassandra, Elasticsearch, Amazon CloudWatch, AWS CloudFormation, Shell, HTML, CSS, APIs
Intern
2014 - 2014
Oracle
- Improved the existing features and implemented new ones in Oracle Retail Suite applications.
- Developed various features for inventory and warehouse management.
- Automated the scenario testing for the retail application stack.
- Created a test suite to accommodate end-to-end testing (including integration and front-end tests) and unit test for the API services.
- Improved the performance and release cycle with automated test suites and enhanced the delivery to production environments.
Technologies: JavaScript, SoapUI, Oracle Database, PL/SQL, Java, CSS, APIs
Experience
Freshokartz Saarthi
https://play.google.com/store/apps/details?id=com.freshokartz_resellerFreshokartz Saarthi is a first-of-its-kind initiative to enrich rural parts of India. The app intends to build a social commerce platform where Saarthis can onboard and provide agriculture, health, and finance-related services to rural parts of India where its availability is a very big concern. By providing these services, Freshokartz awards its Saarthis with regular income and also creates earning opportunities in challenging areas.
I'm the tech lead in this project, in charge of building the back end, the React Native mobile application, and the real-time monitoring system using Grafana together with other team members.
I'm the tech lead in this project, in charge of building the back end, the React Native mobile application, and the real-time monitoring system using Grafana together with other team members.
Booking.com
Extended Booking.com's established systems to also allow apartments and home properties.
Worked on implementing efficient solutions on Booking.com's main website and its partner website (property owners) to provide better content efficiently.
Researched and analyzed different scenarios to understand what the guests need to increase the conversion rate for apartments and home properties on Booking.com's platform.
Worked on various performance improvement, monitoring, and data gathering-related tasks during this period.
Worked on implementing efficient solutions on Booking.com's main website and its partner website (property owners) to provide better content efficiently.
Researched and analyzed different scenarios to understand what the guests need to increase the conversion rate for apartments and home properties on Booking.com's platform.
Worked on various performance improvement, monitoring, and data gathering-related tasks during this period.
In House Cloud PaaS @ Works Application Pte Ltd. Singapore
https://www.worksap.sg/Researched, designed, and implemented in-house solutions for all cloud services, such as AWS and Azure.
Created in-house services such as compute cloud, object storage, container management system, load balancer, on-demand environment, block storage, and so on.
Developed web applications to support various operations such as installation, version up, migration, backup/restore, and more in production or evaluation environments.
Designed the complete system's architecture and optimized the performance of deployments in production and evaluation landscapes using parallel programming.
Automated an idempotent infrastructure to set up the production and evaluation environment with ease.
Created in-house services such as compute cloud, object storage, container management system, load balancer, on-demand environment, block storage, and so on.
Developed web applications to support various operations such as installation, version up, migration, backup/restore, and more in production or evaluation environments.
Designed the complete system's architecture and optimized the performance of deployments in production and evaluation landscapes using parallel programming.
Automated an idempotent infrastructure to set up the production and evaluation environment with ease.
Education
2011 - 2015
Bachelor of Technology Degree in Computer Science and Engineering
Indian Institute of Information Technology - Jabalpur, Madhya Pradesh, india
Certifications
AUGUST 2026 - AUGUST 2027
Claude Certified Architect - Foundations
Anthropic
OCTOBER 2018 - OCTOBER 2020
Certified Scrum Developer
Scrum Alliance
OCTOBER 2018 - PRESENT
Neural Networks and Deep Learning
Deeplearning.ai via Coursera
Skills
Libraries/APIs
React, Node.js, AWS Amplify, Azure Blob Storage API
Tools
Shell, GitHub, Jenkins, IntelliJ IDEA, Git, Sublime Text, SoapUI, React Apollo, Amazon CloudWatch, AWS CloudFormation, Amazon Cognito, Sentry, Grafana, Celery, Amazon Simple Notification Service (SNS), Ansible, Boto 3, Claude Code, Claude
Languages
JavaScript, Java, Python, HTML, TypeScript, SAML, Perl, GraphQL, Python 3, CSS
Frameworks
Redux, Spring Boot, Flutter, Next.js, Django, React Native, Serverless Framework, Bootstrap 3, Dropwizard
Paradigms
Test-driven Development (TDD), Agile, Serverless Architecture, Microservices, Reactive Programming
Platforms
Android, iOS, Firebase, Amazon Web Services (AWS), Ubuntu, MacOS, Oracle Database, Docker, Blockchain, KVM, Netlify, Contentful, Amazon EC2, AWS Lambda, Algolia, Kubernetes, OpenStack
Storage
MySQL, PL/SQL, Google Cloud, Cassandra, Elasticsearch, Amazon S3 (AWS S3), MongoDB, PostgreSQL
Other
Full-stack, API Integration, Minimum Viable Product (MVP), Performance Optimization, Web Development, Serverless, Microsoft Azure, Gatsby, Styled-components, Amazon API Gateway, Workers, APIs, Artificial Intelligence (AI), Large Language Models (LLMs), Machine Learning, AI Agents, Agentic AI Systems, AI Agent Orchestration
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