# Justine Kizhakkinedath
Full-stack product engineer
Pune, Maharashtra, India | justine@kizhak.com | LinkedIn: https://www.linkedin.com/in/justinekizhak

## Professional summary
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

### Full Stack Developer - Verto
Oct 2024 - Present | Full-time
Current full-stack development role. LinkedIn confirms the position and start date; employer-specific scope and outcomes are not public.

### SDE II - HighLevel
Apr 2022 - Jun 2024 | Full-time
Worked on HighLevel's Conversations product across frontend and backend systems, delivering CRM communication features, extensible channel integrations and performance improvements.

Responsibilities:
- 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.

Outcomes:
- 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%.

Technologies: TypeScript, JavaScript, Vue 3, Pinia, TanStack Query, React, Node.js, NestJS, Python, Firebase, MongoDB, MySQL, Redis, GCP, Kubernetes, Cypress

### Member of Technical Staff - Mindstix Software Labs
Dec 2019 - Mar 2022 | Full-time
Built and maintained client- and server-side applications for e-commerce programmes, including personalised shopping experiences, catalog access and order-processing integrations.

Responsibilities:
- 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.

Outcomes:
- Delivered scalable e-commerce work estimated in the October 2024 résumé to serve more than 10,000 B2B customers, alongside a larger B2C audience.

Technologies: Vue.js, React, Next.js, Python, Flask, FastAPI, MongoDB, AWS, AWS Lambda, Epicor ERP

## Selected production outcomes

### API latency reduction
Reduced average API latency from approximately 5 to 6 seconds to under 2 seconds.
Contribution: Contributed to the engineering work that reduced average request latency.
Measured outcome: Average API latency reduced to under 2 seconds.
Verification status: employer-confidential
Limitations: Self-reported professional evidence. Employer telemetry and implementation details are not public.

### High-volume API operations
Worked on APIs serving more than 10 million requests per month.
Contribution: Contributed as a senior, frontend-heavy full-stack engineer and independently owned features.
Measured outcome: More than 10 million API requests served per month.
Verification status: employer-confidential
Limitations: Self-reported professional evidence. Employer details, telemetry and source artifacts are not public.

### Email preview security isolation
Resolved critical XSS and CSS-leak risks by isolating third-party email content in a sandboxed preview environment.
Contribution: Implemented sandboxing that contained untrusted code and prevented style and JavaScript leakage between email content and the CRM.
Measured outcome: Security risk reduction reported as greater than 90%.
Verification status: employer-confidential
Limitations: Self-reported in the October 2024 résumé. Security assessments and incident records are not public.

### Infrastructure cost reduction
Helped migrate services from App Engine to NestJS, Docker and Kubernetes; the migration contributed to an approximately 80% reduction in infrastructure costs.
Contribution: Helped deliver the service migration. The cost result is attributed to the migration, not solely to one engineer.
Measured outcome: Approximately 80% reduction in infrastructure costs associated with the migration.
Verification status: employer-confidential
Limitations: Self-reported professional evidence. Employer billing records and implementation details are not public.

### Service memory reduction
Reduced application memory consumption by more than 60%, from approximately 500 MB to approximately 200 MB.
Contribution: Contributed to the engineering work that reduced application memory consumption.
Measured outcome: Application memory consumption reduced by more than 60%.
Verification status: employer-confidential
Limitations: Self-reported professional evidence. Employer telemetry and implementation details are not public.

### Composer technical-debt reduction
Unified separate channel-specific composer modules into one interface, reducing the associated technical debt by more than 80%.
Contribution: Designed and delivered the unified composer experience as a frontend developer.
Measured outcome: More than 80% reduction in associated composer technical debt.
Verification status: employer-confidential
Limitations: Self-reported in the October 2024 résumé. Employer code and delivery records are not public.

### Email navigation support-ticket reduction
Reduced support tickets related to email navigation by 50% after delivering a more intuitive preview and reply experience.
Contribution: Developed the frontend email viewing and reply experience.
Measured outcome: 50% reduction in email-navigation support tickets.
Verification status: employer-confidential
Limitations: Self-reported in the October 2024 résumé. Employer support data is not public.

### Composer editor compatibility
Delivered a CRM email and SMS composer reported as 90% compatible with Gmail editing behaviour and 98% cross-compatible with the legacy TinyMCE v3 editor.
Contribution: Implemented the composer using Vue 3, Pinia and Cypress.
Measured outcome: 90% Gmail compatibility and 98% TinyMCE v3 cross-compatibility.
Verification status: employer-confidential
Limitations: Self-reported in the October 2024 résumé. The compatibility methodology and employer test artifacts are not public.

### E-commerce customer reach
Delivered scalable e-commerce work estimated to serve more than 10,000 B2B customers, alongside a larger B2C audience.
Contribution: Contributed full-stack delivery across personalised shopping, catalog and order-processing experiences.
Measured outcome: Estimated reach above 10,000 B2B customers.
Verification status: self-reported
Limitations: An estimate stated in the October 2024 résumé. Customer analytics and attribution records are not public.

## Capabilities
- TypeScript and Node.js: Frontend-heavy full-stack engineering across TypeScript, Node.js, React, Vue and NestJS. Used in production systems and current developer-tooling work.
- Distributed services: Experience building and scaling distributed production services in fintech and high-growth software environments. Supported by high-volume API and service performance outcomes.
- Performance optimisation: API latency, service memory and infrastructure-efficiency work with measurable production outcomes. Outcomes are self-reported and employer-confidential.
- GCP and Kubernetes: Experience migrating services from App Engine to NestJS, Docker and Kubernetes. Production migration work; public implementation artifacts are not available.
- Frontend product engineering: Complex product interfaces in Vue and React, including rich-text composition, secure content previews, attachments and workflow-focused CRM tools. Production delivery using Vue 3, Pinia, TanStack Query, React, Next.js and Cypress.
- Secure third-party content rendering: Sandboxing untrusted email content to contain malicious code and prevent CSS or JavaScript leakage into host applications. Applied to production email preview and reply workflows.
- Integration platforms: Extensible OAuth and webhook architectures that let internal and third-party teams add communication channels. Production work spanning content validation, verified email management and consolidated webhook payloads.
- Commerce platforms: Full-stack commerce delivery across personalised shopping, catalog access, order processing and ERP integration. Amway and PENCOM programmes using React, Next.js, AWS Lambda and Epicor ERP.
- Coding-agent evaluation: Investigating how teams can evaluate agent-produced software with deterministic, evidence-backed signals. Current area of interest and experimentation, not presented as completed production expertise.
- Context and memory systems: Exploring contextual memory, context ranking and organisational knowledge for engineering agents. Current area of research and experimentation.
- Release evidence and governance: Exploring deterministic release-risk scoring, deployment evidence and reviewable release decisions. Active DeployTitan product and systems exploration.
- Reliable deployment of agent-produced changes: Investigating how teams can verify, govern and safely operate software produced by AI agents. A coherent current direction grounded in prior production and deployment experience.

## Technologies
TypeScript, JavaScript, Vue 3, Pinia, TanStack Query, React, Node.js, NestJS, Python, Firebase, MongoDB, MySQL, Redis, GCP, Kubernetes, Cypress, Vue.js, Next.js, Flask, FastAPI, AWS, AWS Lambda, Epicor ERP, Distributed services, IMAP, SMTP, App Engine, Docker, OAuth, Webhooks, GitHub integrations, MCP, Sanity CMS

## Selected projects

### Scaling a high-volume communications platform
Status: demonstrated
Production API and service performance work at more than 10 million requests per month.
Contribution: Senior, frontend-heavy full-stack engineering with independent feature ownership and performance optimisation work.
Outcomes:
- Average API latency reduced to under 2 seconds.
- Service memory consumption reduced to approximately 200 MB.
Technologies: TypeScript, Node.js, NestJS, Distributed services
More information: https://justine.kizhak.com/work/scaling-high-volume-communications-platform

### Secure email viewer and reply system
Status: demonstrated
A Gmail-like email preview and reply experience embedded securely inside a CRM.
Contribution: Owned frontend delivery and contributed across the supporting Node.js and NestJS services.
Outcomes:
- Resolved critical XSS and CSS-leak risks; the October 2024 résumé reports a security-risk reduction above 90%.
- Reduced support tickets related to email navigation by 50%.
Technologies: Vue 3, Pinia, TanStack Query, Node.js, NestJS, Cypress, IMAP, SMTP
More information: https://justine.kizhak.com/work/secure-email-viewer-and-reply-system

### Migrating services to Kubernetes infrastructure
Status: demonstrated
A service migration from App Engine to NestJS, Docker and Kubernetes.
Contribution: Contributed to the migration; the resulting cost reduction is attributed to the broader migration rather than solely to one engineer.
Outcomes:
- The migration contributed to an approximately 80% reduction in infrastructure costs.
Technologies: GCP, App Engine, NestJS, Docker, Kubernetes
More information: https://justine.kizhak.com/work/app-engine-to-kubernetes-migration

## Focus and role preferences

Current focus:
- Product engineering
- Backend performance
- Cloud infrastructure
- Release tooling

Target roles:
- Senior full-stack engineer
- Senior product engineer
- Platform engineer
- Early engineer at a developer-tools company

## Confirmed facts
- Professional software engineering experience since December 2019.
- Current role: Full Stack Developer at Verto.
- Previous roles: SDE II at HighLevel and Member of Technical Staff at Mindstix Software Labs.
- LinkedIn-listed skills include PostgreSQL, web development and frontend engineering.
- Bachelor of Engineering in Computer Engineering from P.V.G.'s College of Engineering and Technology, Pune.
- Founder of DeployTitan.
- Currently working with Next.js, TypeScript, GCP, GitHub integrations, MCP, Sanity CMS and modern developer tooling.

## Source and freshness
Last updated: 2026-07-25T18:36:48Z
Canonical profile: https://justine.kizhak.com/
HTML resume: https://justine.kizhak.com/resume
Structured profile data: https://justine.kizhak.com/api/profile