AntonKalashnikau
Available for Part-Time Consulting

Building Excellence in Engineering Teams & Digital Products

Specialized in frontend architecture, API design, and engineering leadership — crafting scalable solutions from startup SaaS products to enterprise platforms, with focus on quality and performance.

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Years in Leadership
  • Led development teams at startups and enterprises
  • Built successful SaaS products and enterprise solutions
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Engineers Mentored
  • Mentored teams in frontend & API development best practices
  • Established quality-driven development culture
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Projects Delivered
  • Built SaaS platforms with focus on UX and accessibility
  • Architected scalable frontend and API solutions
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Based in Wroclaw, Poland — Open to Remote Work

Areas of Expertise

Frontend Excellence

Building scalable web applications with micro-frontends, advanced rendering strategies, and cross-framework expertise

React/Next.js/VueMicro-frontendsTypeScriptPerformanceSSR/SSGState Management

API Development

Designing and implementing high-performance APIs across multiple languages and frameworks

Node.jsPython/FastAPIGoREST/GraphQLAPI DesignMicroservices

Technical Leadership

Leading development teams and establishing technical standards for quality and efficiency

Team BuildingMentoringAgile/ScrumProcessStrategyGrowth

Quality Engineering

Implementing comprehensive quality standards with focus on performance, accessibility, and maintainability

Web VitalsA11Y/SEOTestingCI/CDMonitoringSecurity

System Architecture

Designing scalable architectures with focus on security, performance, and maintainability

System DesignCloud ServicesIntegrationScalabilitySecurityPerformance

Development Culture

Building quality-focused engineering culture with emphasis on code quality and knowledge sharing

Code QualityDocumentationBest PracticesReviewsMentoringInnovation

Work Experience

Team Lead & Frontend Tech Lead

PerfectScale
August 2022 - Present
Kubernetes Optimization Platform
Leading team of 5 engineers

Led the transformation of an on-premises solution into a full-featured SaaS platform

Implemented comprehensive auth system and feature flag management

Established frontend monitoring, E2E testing, and smoke test infrastructure

Developed and maintained a robust component library for consistent UI/UX

Successfully planned and delivered numerous epics, enhancing platform capabilities

Conducted Scrum ceremonies and sprint planning for efficient team delivery

ReactTypeScriptGoNode.jsKubernetesSaaSE2E TestingComponent LibraryAgile

Lead Software Engineer / Lead Resource Manager

EXADEL
January 2021 - August 2022

Delivered high-quality software solutions, managing both technical and project aspects

Enhanced team efficiency as Resource Management lead in the Web Development Department

Conducted code reviews and implemented Agile methodologies for improved team agility

Mentored multiple junior developers and conducted dozens of technical interviews

Resource ManagementAgileCode ReviewTeam LeadershipWeb DevelopmentMentoring

Lead Software Engineer

Mercans
August 2019 - December 2021
HRM and Payroll
Leading team of 5 engineers

Led the HRM and Payroll system design and implementation, introducing innovative solutions

Integrated CI/CD processes, improving deployment efficiency

Led and mentored a team of 5, promoting a culture of innovation

Conducted root cause analysis to enhance system performance

HRMPayrollSystem DesignCI/CDTeam LeadershipPerformance Optimization

Senior Software Engineer

Cortlex
July 2015 - August 2019

Involved in full project lifecycle, ensuring client satisfaction and problem-solving

Established strong client relationships through technical expertise and reliable delivery

Delivered releases on schedule, meeting project deadlines and expectations

Project ManagementClient RelationsTechnical LeadershipRelease Management

Earlier Experience

Trainer at TeachMeSkills
January 2016 - July 2016

Conducted web development courses, covering HTML, CSS, JavaScript/TypeScript

Software Engineer at Krios Group
December 2014 - May 2015

Developed Joomla components and integrated with Zoho CRM and payment gateways

Software Engineer at Creacept
November 2013 - November 2014

Led development for over 25 CMS platform sites and developed a referral system component

Selected Work

PerfectScale — Kubernetes Optimization Platform

Led the development of an enterprise Kubernetes optimization platform, transforming an on-premises solution into a scalable SaaS product that enhances cluster observability and achieves significant cost reductions for enterprise clients.

  • Architected multi-tenant SaaS frontend serving 1000+ enterprise clusters
  • Implemented comprehensive auth system and feature flag management
  • Built real-time dashboard with advanced data visualization and filtering
KubernetesReactTypeScriptGoGitHub ActionsDocker

Insurance Claims Processing Platform

Spearheaded the development of a modern insurance claims platform utilizing serverless architecture and intelligent data extraction, significantly reducing processing time and improving accuracy.

  • Designed serverless architecture processing thousands of claims daily
  • Implemented high-performance APIs with FastAPI and Go
  • Built scalable frontend with React and modern state management
ServerlessFastAPIPythonReactGoAWS

Educational Platform for Children with Dyslexia

Designed and developed an interactive educational platform to support children with dyslexia, featuring personalized learning paths, real-time progress tracking, and gamified exercises to enhance engagement and learning outcomes.

  • Built interactive learning modules with gamification elements
  • Implemented real-time progress tracking and analytics dashboard
  • Achieved full WCAG 2.1 compliance for accessibility standards
ReactTypeScriptNode.jsFirebaseAccessibilityReal-time Analytics

Core Technologies

A curated stack of modern technologies I use to build scalable and maintainable solutions

Frontend Development

React & Next.js

SSR, ISR, Vercel deployment, App Router

TypeScript

Type-safe development, Monorepo

State Management

Redux, React Query, Zustand

Architecture

Micro-frontends, Feature Flags, Performance

Backend & APIs

Go & Node.js

Microservices, API Gateway patterns

Python & FastAPI

High-performance async APIs

Databases

PostgreSQL, MongoDB, Redis

Architecture

Service Mesh, Event-driven, Scalability

Cloud & Infrastructure

Kubernetes

Container orchestration, Cost optimization

Cloud Platforms

AWS, GCP, Multi-cloud

IaC

Terraform, Infrastructure optimization

Observability

Prometheus, Grafana, Tracing

DevOps & Practices

CI/CD

GitHub Actions, Jenkins

Security

Security best practices

Testing

Unit, E2E, Integration

Agile & DevOps

Scrum, Kanban

Get in Touch

Available for consulting in frontend architecture, API development, and engineering leadership. Specialized in building scalable web applications and mentoring development teams.

kalashnikau[@]gmail[.]com
Wroclaw, Poland (CEST)
Available for consulting & advisory roles
Schedule a CallConnect on LinkedIn