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Sajit Khadka

Software Engineer, Integrations

Software engineer building integrations and event-driven backend systems on AWS and Kubernetes. Seven years across HR tech, fintech and SaaS.

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Software Engineer, Integrations

Perceptyx•Remote

April 2026 – Present

Integrations team for an employee-survey platform, connecting customers' HR and recruiting systems

Moving customer data onboarding from a manual, tool-driven process to event-driven webhooks→ Faster onboarding
Building ingestion on AWS Lambda and SQS with Merge.dev as the HRIS/ATS layer→ Self-service setup
Managing infrastructure as code with Terraform→ Reviewed, repeatable changes
GoTypeScriptAWS LambdaSQSTerraformKubernetesMerge.devDatadog

Software Engineer, Backend

Rakuten•Toronto, Canada

July 2025 – December 2025

Backend services for financial products platform processing millions of transactions monthly

Eliminated 100+ daily processing failures→ 99.9% reliability
Reduced deployment cycle from weeks to hours→ Feature flags & A/B testing
Validated 10M+ records during card migration→ Zero data loss
Optimized Lambda handlers for 500K+ daily events→ <100ms p95 latency
Improved codebase maintainability→ 35% fewer bugs
Node.jsJavaSpring BootTypeScriptPostgreSQLKafkaRedisAWSKubernetesDatadog

Senior Software Developer

Guhuza•Toronto, Canada

November 2021 – July 2025

Backend architecture for AI-powered SaaS platform scaling to 100K+ active users

Architected event-driven microservices with Kafka→ 60% throughput gain
Built subscription engine with pricing tiers→ 40% LTV increase
Integrated Stripe with idempotent webhooks→ <1% payment failures
Optimized MySQL queries and Redis caching→ 45% faster responses
Deployed on Azure Kubernetes Service→ 99.95% uptime
Node.jsNestJSTypeScriptMySQLKafkaRedisReactAzureKubernetesStripe

Instructor (Part-time)

Humber College•Toronto, Canada

September 2023 – December 2024

Taught Core Java, Spring Boot and Android development alongside a full-time engineering role

Taught backend and mobile courses to students entering the industry→ 100+ students
JavaSpring BootAndroid

Full Stack Developer

Omadatek•Toronto, Canada

August 2020 – November 2021

Full-stack applications for field service management serving 10K+ daily users

Built admin portals with React and GraphQL→ 30% faster workflows
Developed React Native mobile app→ Real-time GPS tracking
Designed Node.js APIs with MongoDB→ RESTful & GraphQL
Optimized GraphQL resolvers→ 40% response time cut
ReactReact NativeNode.jsGraphQLMongoDBAWSDocker

Software Developer

ITGlance•Kathmandu, Nepal

January 2017 – August 2018

Enterprise web applications with Java backend and Angular frontend

Built Spring Boot REST APIs→ User management & reporting
Designed MySQL schemas→ Complex query optimization
Implemented Spring Security→ Role-based access control
JavaSpring BootAngularMySQLREST APIs

Seven years building backend and integration systems