Justine Kizhakkinedath

Senior Full-Stack Software Engineer

Pune, Maharashtra, Indiajustine@kizhak.com +91 9028463326

Professional summary

Senior Full-Stack Software Engineer with 7 years building production systems in fintech, CRM and e-commerce. Owns features end-to-end from architecture through rollout, with a focus on distributed services, API performance, and resilient financial workflows. Core stack: TypeScript, React, Next.js, Node.js, NestJS, Python, PostgreSQL, MongoDB, Redis, AWS, GCP, Docker and Kubernetes.

Experience

Professional engineering since 2019

Full Stack Developer

Oct 2024 - Sep 2026

Verto · Full-time

Own full-stack fintech features end-to-end - onboarding, ledger operations, and invoice settlement - with a focus on resilient, auditable financial workflows and cross-team engineering quality.

Architect and deliver full-stack fintech features across onboarding, payments, ledger operations, revenue workflows and compliance tooling.
Design resilient financial workflows using idempotency, concurrency controls, circuit breakers, retries, rollback paths, dead-letter handling and progressive delivery.
Lead features from technical design through production rollout, monitoring, documentation and cross-team handoff.
Raise engineering quality through strict typing, automated testing, load testing, lower-environment validation, technical knowledge sharing and mentoring.
Shipped Onboarding v5 KYC and pricing modules with zero critical post-release issues; monthly onboarding volume subsequently reached , approximately the January-September average of 91.

126

38% above

Audited 147,000 production logs, identified more than 72,000 silent validation errors and helped resolve the underlying data-retrieval issue before it became customer-facing.

Designed resilience and auditability controls for automated invoice settlement and ledger-hold workflows.

Expanded API access for sub-account customers while preserving usage and charge attribution.

Won Verto's internal Outstanding Innovation award and delivered company-wide engineering talks on state machines and progressive delivery.

Technologies: TypeScript, Angular, AWS Lambda, AWS CodeBuild, CI/CD, Distributed systems, k6, Kibana, PostHog, OpenFeature, State machines, Micro-frontends, REST APIs

SDE II

Apr 2022 - Jun 2024

HighLevel · Full-time

Delivered CRM communication features and performance improvements for HighLevel's Conversations product, spanning frontend, backend, and extensible third-party integrations.

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%.

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

Member of Technical Staff

Dec 2019 - Mar 2022

Mindstix Software Labs · Full-time

Built and maintained full-stack e-commerce applications for Amway and PENCOM, including personalised shopping, catalog, and ERP-integrated order-processing systems.

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 e-commerce platform work supporting 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

Skills

Technical scope

Production engineering: TypeScript and Node.js, Distributed services, Performance optimisation, React, Next.js and Vue
Cloud infrastructure: GCP and Kubernetes, AWS and Docker
Application security: Secure third-party content rendering
Backend engineering: OAuth, webhooks and REST API integrations, PostgreSQL, MongoDB and Redis
Product engineering: E-commerce platforms and ERP integrations

Projects

Context behind the outcomes

Architecting Onboarding v5: KYC and pricing

Architected core modules and led post-release verification for a compliance-critical fintech onboarding workflow.

Shipped with zero critical post-release issues; monthly onboarding volume reached a yearly high of 126, approximately 38% above the prior nine-month average of 91.
Audited 147,000 production logs and identified more than 72,000 silent validation errors before they escalated into a customer-facing incident.

Technologies: TypeScript, Angular, AWS Lambda, Kibana, State machines

View case study

Scaling a high-volume communications platform

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

Average API latency reduced to under 2 seconds.
Service memory consumption reduced to approximately 200 MB.

Technologies: TypeScript, Node.js, NestJS, Distributed services

View case study

Resilience controls for automated invoice settlement and ledger holds

Designed and delivered the resilience and auditability architecture for two adjacent financial workflows.

Created automated recovery and progressive-release paths for a high-risk financial workflow.
Added automated integrity validation and load-resiliency testing to a financially sensitive ledger workflow.

Technologies: TypeScript, Angular, State machines, OpenFeature, REST APIs

View case study

Welcome to my portfolio

Justine Kizhakkinedath

Professional summary

Experience

Full Stack Developer

SDE II

Member of Technical Staff

Skills

Projects

Architecting Onboarding v5: KYC and pricing

Scaling a high-volume communications platform

Resilience controls for automated invoice settlement and ledger holds

Education

Bachelor of Engineering in Computer Engineering from P.V.G.'s College of Engineering and Technology, Pune.

Additional experience

Founder of AstralForge Labs LLP