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I'm a senior software engineer with 15+ years of experience designing and delivering SaaS products, modern web applications, and scalable systems for distributed international teams. I focus on delivering robust frontend and backend solutions using Angular, TypeScript, Node.js, NestJS, and AWS serverless technologies. I excel at designing maintainable architectures, integrating third-party services, and taking ownership in remote-first environments. I enjoy collaborating with product and engineering teams to deliver high-quality software across the full stack.…I'm a senior software engineer with 15+ years of experience designing and delivering SaaS products, modern web applications, and scalable systems for distributed international teams. I focus on delivering robust frontend and backend solutions using Angular, TypeScript, Node.js, NestJS, and AWS serverless technologies. I excel at designing maintainable architectures, integrating third-party services, and taking ownership in remote-first environments. I enjoy collaborating with product and engineering teams to deliver high-quality software across the full stack.

Kostiantyn Ivannikov

Full Stack Developer, Web Developer, Back-End Developer, +2

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I'm a senior software engineer with 15+ years of experience designing and delivering SaaS products, modern web applications, and scalable systems for distributed international teams. I focus on delivering robust frontend and backend solutions using Angular, TypeScript, Node.js, NestJS, and AWS serverless technologies. I excel at designing maintainable architectures, integrating third-party services, and taking ownership in remote-first environments. I enjoy collaborating with product and engineering teams to deliver high-quality software across the full stack.…I'm a senior software engineer with 15+ years of experience designing and delivering SaaS products, modern web applications, and scalable systems for distributed international teams. I focus on delivering robust frontend and backend solutions using Angular, TypeScript, Node.js, NestJS, and AWS serverless technologies. I excel at designing maintainable architectures, integrating third-party services, and taking ownership in remote-first environments. I enjoy collaborating with product and engineering teams to deliver high-quality software across the full stack.

Available to hire

I’m a senior software engineer with 15+ years of experience designing and delivering SaaS products, modern web applications, and scalable systems for distributed international teams. I focus on delivering robust frontend and backend solutions using Angular, TypeScript, Node.js, NestJS, and AWS serverless technologies.

I excel at designing maintainable architectures, integrating third-party services, and taking ownership in remote-first environments. I enjoy collaborating with product and engineering teams to deliver high-quality software across the full stack.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Spanish; Castilian

Advanced

Ukrainian

Fluent

Work Experience

Senior Software Engineer at simpleshow GmbH

February 1, 2026 - May 1, 2026

Developed frontend functionality for AI-assisted video creation workflows and content management systems; worked within a large Angular application (~15–20 modules); contributed to maintainability and upgrade readiness across product areas; collaborated with product and engineering teams in a distributed environment; supported biweekly release cycles.

Senior Fullstack Software Engineer at Agendacita

August 1, 2023 - February 1, 2026

Designed and developed a SaaS platform from scratch using Angular, NestJS, and AWS serverless technologies; built frontend systems and backend APIs for appointment-based workflows; integrated third-party services; implemented infrastructure with AWS Lambda, API Gateway, DynamoDB, Cognito, and S3; built deployment workflows and CI/CD pipelines; owned product implementation across frontend, backend, infrastructure, and deployments.

Senior Software Engineer at Svitla Systems

March 1, 2022 - August 1, 2023

Migrated AngularJS applications toward modern Angular architecture; delivered frontend functionality and modernization improvements; modernized mobile applications from Ionic Cordova to Capacitor; worked in an international team (~8–10 engineers); participated in code reviews and engineering discussions.

Senior Software Engineer at Virtido

December 1, 2020 - December 1, 2021

Developed and enhanced functionality for SaaS wealth management systems; delivered frontend features and improvements across multiple product modules; improved maintainability and component consistency; collaborated with distributed product teams.

Team Lead / Senior Software Engineer at GlobalLogic

October 1, 2019 - December 1, 2020

Contributed to OTT applications across iOS, Android, Apple TV and Android TV platforms; participated in frontend and backend development across multiple projects; coordinated development tasks and collaborated with distributed teams; mentored 6 junior developers; conducted code reviews and supported delivery processes.

Senior Software Engineer at Lagoteam

November 1, 2018 - October 1, 2019

Built analytics dashboards and reporting tools using Angular and D3.js; delivered interactive data visualization functionality across multiple application modules; developed features focused on usability and business insights.

Senior Software Engineer at Wildix

September 1, 2017 - October 1, 2018

Developed functionality for VoIP and telecom systems; refactored existing systems to improve maintainability and code quality; created API documentation and maintained browser extension functionality; worked within a large engineering organization.

Software Engineer at Atniwe

September 1, 2015 - September 1, 2017

Developed hotel management platform functionality using Angular and backend integrations; participated in migration activities from AngularJS toward modern Angular approaches; delivered frontend features and product enhancements.

Software Engineer at zTeam

September 1, 2013 - September 1, 2015

Developed websites, e-commerce solutions, and business applications; built and maintained production functionality for client projects; delivered frontend implementations and integrated backend systems.