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I am Sreejith R Nair, a Senior Backend Developer with 13+ years of experience delivering PHP and Python-based enterprise software across retail, finance, and education sectors. I’ve built and maintained more than 15 production applications including ERP systems, CRMs, POS solutions, and SaaS products, primarily using Laravel, CodeIgniter, Symfony, and WordPress. I excel at designing scalable, database-driven architectures (MySQL, MSSQL) and automating processes to reduce manual work by significant margins. I’m AWS-certified and comfortable deploying cloud-based solutions, RESTful APIs, and third-party service integrations. As a team lead, I have steered cross-functional Agile teams of up to 8 developers, conducted 500+ code reviews, and mentored junior engineers. I emphasize secure coding, RBAC, performance tuning, CI/CD, and robust monitoring to deliver reliable, highly available software. I’m passionate about solving complex business problems with clean architecture and thoughtful automation, from real-time data synchronization to multi-tenant SaaS platforms.…I am Sreejith R Nair, a Senior Backend Developer with 13+ years of experience delivering PHP and Python-based enterprise software across retail, finance, and education sectors. I’ve built and maintained more than 15 production applications including ERP systems, CRMs, POS solutions, and SaaS products, primarily using Laravel, CodeIgniter, Symfony, and WordPress. I excel at designing scalable, database-driven architectures (MySQL, MSSQL) and automating processes to reduce manual work by significant margins. I’m AWS-certified and comfortable deploying cloud-based solutions, RESTful APIs, and third-party service integrations. As a team lead, I have steered cross-functional Agile teams of up to 8 developers, conducted 500+ code reviews, and mentored junior engineers. I emphasize secure coding, RBAC, performance tuning, CI/CD, and robust monitoring to deliver reliable, highly available software. I’m passionate about solving complex business problems with clean architecture and thoughtful automation, from real-time data synchronization to multi-tenant SaaS platforms.

Sreejith R Nair

PRO

Back-End Developer, Full Stack Developer, Web Developer, +1

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I am Sreejith R Nair, a Senior Backend Developer with 13+ years of experience delivering PHP and Python-based enterprise software across retail, finance, and education sectors. I’ve built and maintained more than 15 production applications including ERP systems, CRMs, POS solutions, and SaaS products, primarily using Laravel, CodeIgniter, Symfony, and WordPress. I excel at designing scalable, database-driven architectures (MySQL, MSSQL) and automating processes to reduce manual work by significant margins. I’m AWS-certified and comfortable deploying cloud-based solutions, RESTful APIs, and third-party service integrations. As a team lead, I have steered cross-functional Agile teams of up to 8 developers, conducted 500+ code reviews, and mentored junior engineers. I emphasize secure coding, RBAC, performance tuning, CI/CD, and robust monitoring to deliver reliable, highly available software. I’m passionate about solving complex business problems with clean architecture and thoughtful automation, from real-time data synchronization to multi-tenant SaaS platforms.…I am Sreejith R Nair, a Senior Backend Developer with 13+ years of experience delivering PHP and Python-based enterprise software across retail, finance, and education sectors. I’ve built and maintained more than 15 production applications including ERP systems, CRMs, POS solutions, and SaaS products, primarily using Laravel, CodeIgniter, Symfony, and WordPress. I excel at designing scalable, database-driven architectures (MySQL, MSSQL) and automating processes to reduce manual work by significant margins. I’m AWS-certified and comfortable deploying cloud-based solutions, RESTful APIs, and third-party service integrations. As a team lead, I have steered cross-functional Agile teams of up to 8 developers, conducted 500+ code reviews, and mentored junior engineers. I emphasize secure coding, RBAC, performance tuning, CI/CD, and robust monitoring to deliver reliable, highly available software. I’m passionate about solving complex business problems with clean architecture and thoughtful automation, from real-time data synchronization to multi-tenant SaaS platforms.

Available to hire

Johannesburg, South Africa

I am Sreejith R Nair, a Senior Backend Developer with 13+ years of experience delivering PHP and Python-based enterprise software across retail, finance, and education sectors. I’ve built and maintained more than 15 production applications including ERP systems, CRMs, POS solutions, and SaaS products, primarily using Laravel, CodeIgniter, Symfony, and WordPress. I excel at designing scalable, database-driven architectures (MySQL, MSSQL) and automating processes to reduce manual work by significant margins. I’m AWS-certified and comfortable deploying cloud-based solutions, RESTful APIs, and third-party service integrations.

As a team lead, I have steered cross-functional Agile teams of up to 8 developers, conducted 500+ code reviews, and mentored junior engineers. I emphasize secure coding, RBAC, performance tuning, CI/CD, and robust monitoring to deliver reliable, highly available software. I’m passionate about solving complex business problems with clean architecture and thoughtful automation, from real-time data synchronization to multi-tenant SaaS platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Backend Developer (Application Development) at BD Technologies AG

December 1, 2023 - Present

Designed, developed, and maintained scalable backend systems and RESTful APIs using Laravel (PHP), supporting multi-tenant SaaS platforms and high-traffic web applications in a fully remote, asynchronous environment. Architected and maintained RESTful APIs consumed by web/mobile clients, ensuring high availability and performance. Built and integrated third-party services (payment gateways, social platforms) using Laravel service providers and custom packages. Implemented role-based access control (RBAC), admin permission systems, and audit logging to enforce security and traceability. Developed background job pipelines using Laravel Queues and Redis for asynchronous processing and real-time data handling. Implemented Redis caching of API responses and heavy database queries, reducing average API response times by up to 40% and cutting repeated query execution time by up to 60% - significantly lowering database load under high traffic. Collaborated across time zones using Mercurial (Hg

Senior Backend Developer / ERP Manager at Choppies Supermarkets SA Pvt Ltd

January 1, 2015 - November 1, 2023

Spearheaded end-to-end ERP implementation across a 90+ store retail chain — leading requirements analysis, system configuration, migration of 1M+ records, and training for 50+ staff — achieving and sustaining 99.5% system uptime post-launch. Engineered MSSQL stored procedures, triggers, and database functions to fully automate inventory, ordering, and reporting workflows, improving data processing efficiency by 50% and eliminating manual intervention. Designed and maintained 8+ RESTful APIs in PHP connecting ERP, WMS, and third-party financial systems, enabling real-time data synchronization and eliminating cross-platform data inconsistencies. Diagnosed and resolved 200+ production ERP issues through structured root cause analysis, applying query tuning and caching strategies that reduced system downtime by 40%. Hardened production environments through proactive performance tuning, security patching, and infrastructure upgrades, sustaining 99%+ availability across all systems.

Senior PHP Developer at Squad Technologies Pvt Ltd

July 1, 2012 - December 1, 2014

Architected and delivered 20+ high-traffic, database-driven web applications in PHP and MySQL for enterprise clients, supporting 10,000+ daily active users. Accelerated delivery cycles by 30% by building scalable MVC applications on Laravel, CodeIgniter, and Symfony, applying OOP design patterns and reusable component libraries. Reduced average page load times by 40% through MySQL query optimisation, indexing, and schema normalisation. Designed and implemented RESTful API architectures with OAuth 2.0 authentication and JSON/XML pipelines, powering frontend interfaces and mobile data layers. Expanded platform capabilities by integrating 15+ third-party APIs (payments, shipping, social platforms), driving a 25% increase in user engagement. Hardened security through input validation, SQL injection prevention, XSS protection, CSRF tokens, and secure session management.

Junior PHP Developer at Siegend Informatix Pvt Ltd

December 1, 2011 - June 1, 2012

Developed and maintained PHP/MySQL web applications, tracked website analytics, and performed QA testing. Ensured best practices in code design, version control, and change implementation.