Justine Kizhakkinedath

Full-stack product engineer

Pune, Maharashtra, Indiajustine@kizhak.comLinkedIn

Full-stack engineer with professional experience since 2019 across product interfaces, backend services, performance optimisation and cloud infrastructure. Production work includes CRM communication tools, extensible channel integrations, e-commerce platforms and APIs serving more than 10 million requests per month. Core technologies include TypeScript, JavaScript, Vue, React, Next.js, Node.js, NestJS, Python, PostgreSQL, MongoDB, Redis, GCP, AWS, Docker and Kubernetes.

Experience

Professional engineering since 2019

Oct 2024 - Present

Full Stack Developer

Verto · Full-time

Current full-stack development role. LinkedIn confirms the position and start date; employer-specific scope and outcomes are not public.

Apr 2022 - Jun 2024

SDE II

HighLevel · Full-time

Worked on HighLevel's Conversations product across frontend and backend systems, delivering CRM communication features, extensible channel integrations and performance improvements.

  • Built a unified email and SMS composer with attachments, previews, templates, custom tokens and compatibility across Gmail, TinyMCE and Twilio editing workflows.
  • Developed a secure email preview and reply experience with sandboxed content, attachment previews, condensed views and IMAP/SMTP synchronisation.
  • Designed an extensible conversations-provider architecture using OAuth apps and webhooks so internal and third-party teams could add new communication channels.
  • Refactored Conversations APIs, database queries and endpoints in collaboration with frontend teams.
  • Reduced average API latency by more than 70%, from approximately 5-6 seconds to under 2 seconds, across workloads above 10 million monthly requests.
  • Reduced application memory consumption by more than 60%.
  • Unified channel-specific composer modules into one interface, reducing associated technical debt by more than 80%.
  • Reduced support tickets related to email navigation by 50%.

Dec 2019 - Mar 2022

Member of Technical Staff

Mindstix Software Labs · Full-time

Built and maintained client- and server-side applications for e-commerce programmes, including personalised shopping experiences, catalog access and order-processing integrations.

  • Led full-stack delivery for a scalable Amway e-commerce experience using React, Next.js and AWS Lambda.
  • Enhanced the PENCOM e-commerce platform and integrated catalog and order-processing workflows with Epicor ERP.
  • Collaborated across product and engineering teams to optimise application behaviour and user experience.
  • Delivered scalable e-commerce work estimated in the October 2024 résumé to serve more than 10,000 B2B customers, alongside a larger B2C audience.

Selected production outcomes

Derived from selected Sanity projects

Scaling a high-volume communications platform

Average API latency reduced to under 2 seconds.

Project context ↗

Scaling a high-volume communications platform

Service memory consumption reduced to approximately 200 MB.

Project context ↗

Secure email viewer and reply system

Resolved critical XSS and CSS-leak risks; the October 2024 résumé reports a security-risk reduction above 90%.

Project context ↗

Secure email viewer and reply system

Reduced support tickets related to email navigation by 50%.

Project context ↗

Selected work

Context behind the outcomes

Scaling a high-volume communications platform

Senior, frontend-heavy full-stack engineering with independent feature ownership and performance optimisation work.

View case study

Secure email viewer and reply system

Owned frontend delivery and contributed across the supporting Node.js and NestJS services.

View case study

Migrating services to Kubernetes infrastructure

Contributed to the migration; the resulting cost reduction is attributed to the broader migration rather than solely to one engineer.

View case study