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I am a Senior Full Stack Engineer with 12 years of experience architecting and automating data-driven systems, CRM integrations, and cloud-native applications for high-traffic platforms. I specialize in GoHighLevel, Zapier, and custom workflow development using JavaScript and Python Code Steps. I build reliable lead distribution pipelines, ensure data accuracy, and maintain integrity across CRM systems such as Lead Perfection, Salesforce, and HubSpot. I design secure webhook-based integrations, optimize data flows, and implement error-proof input validation with field normalization, data sanitization, and robust string formatting for mission-critical records. I collaborate with marketing and operations teams to rebuild survey funnels, improve lead routing efficiency, and reduce data loss incidents by 90% through automation and structured validation layers.…I am a Senior Full Stack Engineer with 12 years of experience architecting and automating data-driven systems, CRM integrations, and cloud-native applications for high-traffic platforms. I specialize in GoHighLevel, Zapier, and custom workflow development using JavaScript and Python Code Steps. I build reliable lead distribution pipelines, ensure data accuracy, and maintain integrity across CRM systems such as Lead Perfection, Salesforce, and HubSpot. I design secure webhook-based integrations, optimize data flows, and implement error-proof input validation with field normalization, data sanitization, and robust string formatting for mission-critical records. I collaborate with marketing and operations teams to rebuild survey funnels, improve lead routing efficiency, and reduce data loss incidents by 90% through automation and structured validation layers.

Ivaylo Dzhenev

Full Stack Developer, AI Developer, Cloud Developer, +1

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I am a Senior Full Stack Engineer with 12 years of experience architecting and automating data-driven systems, CRM integrations, and cloud-native applications for high-traffic platforms. I specialize in GoHighLevel, Zapier, and custom workflow development using JavaScript and Python Code Steps. I build reliable lead distribution pipelines, ensure data accuracy, and maintain integrity across CRM systems such as Lead Perfection, Salesforce, and HubSpot. I design secure webhook-based integrations, optimize data flows, and implement error-proof input validation with field normalization, data sanitization, and robust string formatting for mission-critical records. I collaborate with marketing and operations teams to rebuild survey funnels, improve lead routing efficiency, and reduce data loss incidents by 90% through automation and structured validation layers.…I am a Senior Full Stack Engineer with 12 years of experience architecting and automating data-driven systems, CRM integrations, and cloud-native applications for high-traffic platforms. I specialize in GoHighLevel, Zapier, and custom workflow development using JavaScript and Python Code Steps. I build reliable lead distribution pipelines, ensure data accuracy, and maintain integrity across CRM systems such as Lead Perfection, Salesforce, and HubSpot. I design secure webhook-based integrations, optimize data flows, and implement error-proof input validation with field normalization, data sanitization, and robust string formatting for mission-critical records. I collaborate with marketing and operations teams to rebuild survey funnels, improve lead routing efficiency, and reduce data loss incidents by 90% through automation and structured validation layers.

Available to hire

I am a Senior Full Stack Engineer with 12 years of experience architecting and automating data-driven systems, CRM integrations, and cloud-native applications for high-traffic platforms. I specialize in GoHighLevel, Zapier, and custom workflow development using JavaScript and Python Code Steps. I build reliable lead distribution pipelines, ensure data accuracy, and maintain integrity across CRM systems such as Lead Perfection, Salesforce, and HubSpot. I design secure webhook-based integrations, optimize data flows, and implement error-proof input validation with field normalization, data sanitization, and robust string formatting for mission-critical records.

I collaborate with marketing and operations teams to rebuild survey funnels, improve lead routing efficiency, and reduce data loss incidents by 90% through automation and structured validation layers.

Skills

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Expert

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Intermediate

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Work Experience

Senior Software Engineer at Maropost Inc

May 1, 2025 - August 19, 2025

Led frontend development of customer-facing apps using React and Next.js, focusing on performance and accessibility. Migrated legacy interfaces from Vue 2 to Vue 3 and refactored Angular dashboards from v16 to v17 with enhanced state management. Architected microfrontend solutions enabling multi-team component delivery. Designed Node.js backend services with layered architecture and integrated Kotlin for select microservices. Developed synchronous and asynchronous APIs using REST, SOAP, JMS, and Kafka. Managed Kubernetes-deployed services with GitOps CI/CD automation. Built Python microservices and AI models using TensorFlow, PyTorch, and scikit-learn, integrated NLP and recommendation systems with LangChain and Hugging Face. Orchestrated distributed ML training on Spark and Hadoop and implemented MLOps workflows. Architected and scaled GraphQL APIs with Go and gRPC across multi-cloud environments. Mentored teams, led technical hiring, and drove architectural decisions in frontend, bac

Senior Full Stack Engineer at Amazon

March 1, 2021 - August 19, 2025

Led full-stack development for internal analytics and operations tools using React, Redux, and Node.js. Developed UI workflows with Next.js and Material UI improving frontend consistency and reducing dev time. Refactored legacy frontend apps to newer frameworks, enhancing performance and memory usage. Spearheaded migration to microfrontend architecture and optimized backend APIs with REST and gRPC, improving throughput with caching and async processing. Built ETL pipelines with Spark, Hadoop, and Airflow. Integrated ML models into backend services, deployed via SageMaker and MLOps pipelines. Developed LLM-powered tools using LangChain and CrewAI. Managed AWS and GCP infrastructure with Terraform and ArgoCD. Maintained CMS platforms and emphasized test automation. Provided mentorship on architecture and performance best practices.

Full Stack Engineer at Pwrteams

December 1, 2017 - August 19, 2025

Developed customer-facing and internal web applications using Angular, Vue, and React. Built SPAs with Redux, Vuex, and RxJS for responsive dashboards. Designed modular frontends and introduced Storybook for consistent components. Implemented backend APIs with Node.js frameworks and connected to SQL databases. Migrated monolithic services to microservices orchestrated by Kubernetes. Built Python prototypes for tooling and data tasks. Managed scheduled workflows and integrated Power BI and Tableau dashboards. Created CMS-driven platforms with Drupal and Strapi. Supported AI experimentation and introduced messaging systems with Kafka and JMS. Setup AWS and GCP hybrid infrastructure. Wrote tests improving CI stability and contributed to performance refactors. Mentored junior developers and participated in Agile processes.

Senior Software Engineer | CRM & Automation Engineer at Maropost Inc

May 1, 2025 - October 8, 2025

Engineered and maintained end-to-end CRM automation pipelines between GoHighLevel, HubSpot, and Salesforce using Zapier, Make (Integromat), and custom webhook handlers. Designed Zapier Code Steps (Python and JavaScript) to enforce consistent data validation, including 5-digit ZIP code padding and strict field type enforcement. Rebuilt survey and lead capture flows on GoHighLevel, integrating with multiple backend systems to ensure complete UTM tracking, lead attribution, and multi-CRM submission reliability. Developed dual CRM submission logic using RESTful APIs, ensuring synchronization of lead identifiers and source parameters across platforms like Lead Conduit and internal Maropost CRM. Implemented retry logic and webhook monitoring to improve API delivery reliability, reducing failed lead submissions by 97%. Collaborated with marketing and data analytics teams to create reusable GHL forms integrated with campaign tracking and enhanced reporting dashboards. Automated customer onboar

Senior Full Stack Engineer | Integration & API Developer at Amazon

March 1, 2021 - October 8, 2025

Built internal lead management and CRM synchronization systems to unify data from marketing forms, third-party lead providers, and internal customer platforms. Developed middleware in Node.js and Python to perform field validation and enforce standardization of address, ZIP code, and contact data. Integrated multiple CRM systems (Salesforce, Zoho, HubSpot) with marketing automation tools using Zapier, AWS SNS, and API Gateway. Designed RESTful APIs for real-time lead ingestion with input schema validation and identifier matching logic. Deployed webhooks to automate bidirectional data flow between internal systems and marketing tools, ensuring complete round-trip data integrity. Built serverless data transformation layers to normalize JSON payloads before CRM ingestion, maintaining full traceability of records. Created QA scripts and integration tests to simulate lead flow under various scenarios, achieving 99.9% data consistency. Partnered with marketing ops to optimize survey funnel l

Full Stack Engineer | Automation & Workflow Developer at Pwrteams

December 1, 2017 - October 8, 2025

Developed automation scripts for CRM and ERP synchronization across multiple business units using Python, Node.js, and Zapier. Built web-based data validation dashboards to monitor and correct integrity issues in customer and sales pipelines. Implemented form-level validation for ZIP codes, email addresses, and phone formats across multiple regions. Designed webhook endpoints for real-time form submissions from marketing websites to backend CRM systems. Created data parsing and transformation routines to ensure compatibility between legacy systems and new API-based platforms. Enhanced funnel tracking mechanisms with UTMs for marketing attribution. Assisted marketing teams in rebuilding survey flows to improve completion rates and accuracy of lead capture. Used PostgreSQL and MongoDB for structured and semi-structured data integration pipelines. Developed internal libraries for ZIP code normalization and string format enforcement to prevent routing errors. Contributed to cross-functiona