Years of experience
Web and payment applications
IndiaPortfolio / 2026
Technical Lead · Senior Software Engineer
Ashish Sreejith
I lead a development team and build web applications, payment integrations, and APIs. My work includes system design, code reviews, performance improvements, and production support.
Planning, reviews, and mentoring
Core technologies
- C#
- ASP.NET
- SQL Server
- JavaScript
- HTML
- CSS
Selected work.
Web applications, payments, and performance at Semnox.
PAYMENT PROTECTION
2 daysImplementation time
Payments & security
Payment protection
Designed payment rate limiting to stop card-testing attacks across approximately six client websites.
WEBSITE API PERFORMANCE
30–40%
API performance improvement
API performance
Website API performance
Improved website API performance by reducing redundant calls, optimising SQL queries, and removing unnecessary resources.
CUSTOMER CARD PORTAL
2+ yearsWithout reported incidents
Customer applications
Customer card portal
Built a portal for card balances and entitlements, with token validation, QR scanning, and manual lookup.
Technical skills.
Web development
- C#
- .NET Framework
- ASP.NET Web Forms
- ASP.NET MVC
- Web API
- REST
- SOAP / ASMX
- ADO.NET
- JavaScript
- HTML
- CSS
Data & performance
- SQL Server
- Stored procedures
- API optimisation
- Query optimisation
- Multithreading
- In-memory caching
Security & standards
- PCI DSS
- SISA
- GDPR
- ADA
- Token validation
- reCAPTCHA v3
- Masked logging
Delivery & teamwork
- TFS
- Git
- AWS jump-box deployment
- Release checklists
- Design reviews
- Code reviews
- Developer mentoring
Experience.
Senior Software Engineer
May 2024 — PresentSemnox Solutions Pvt. Ltd. · Bangalore
- Lead 2–4 developers; plan 3–4 enhancements and 2–3 production fixes per quarter.
- Own complex enhancements and high-priority production incidents, while delegating and reviewing team delivery.
- Plan work with the Head of Development and business stakeholders, applying security, privacy, and accessibility requirements.
Software Engineer
Sep 2022 — Apr 2024Semnox Solutions Pvt. Ltd. · Mangalore
- Delivered web, SOAP, and REST enhancements and optimisations in legacy ASP.NET solutions.
- Resolved production issues, coordinated client and vendor feedback, and communicated delivery risks and timelines.
- Trained front-end developers and conducted code reviews.
Software Engineer Intern
Feb 2022 — Jun 2022Semnox Solutions Pvt. Ltd. · Mangalore
- Implemented frontend enhancements, maintained client websites, and customised UI experiences.
Awards
- Semnox OTS Award2024 Q3
Customer party-booking website revision
- Semnox OTS Award2023 Q4
Education
Master of Computer Application
2020 — 2022AIMIT, St Aloysius Deemed to Be University, Mangalore
Bachelor of Computer Application
2017 — 2020St Aloysius Deemed to Be University, Mangalore