Filip Sokołowski

Filip Sokołowski

Lead Software Engineer

location-pin-solidWrocław, Poland
14 years of experience

I am a programmer by profession, a freelancer by choice, a husband by love, a father by heart, and a traveler by passion

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About Me

I’m a product-minded developer who values both high standards and human balance. I work best where clarity, systems thinking, and calm execution matter — especially in complex, fast-moving environments.

For the past years, I’ve been combining deep professional focus with an intentionally lived life. During the week, I thrive in demanding projects, long hours, and challenging decisions. On weekends, I slow down. While living and traveling in Japan, those moments of calm often came through walking parts of the Henro pilgrimage — the 88-temple route on Shikoku. That deeply spiritual practice helped me reset, regain perspective, and return to work grounded and focused.

This balance shapes how I work with people and products. I bring reliability under pressure, thoughtful communication, and a long-term mindset. I care about systems that scale, decisions that make sense over time, and teams that feel safe to do great work.

Professionally, I’m driven, disciplined, and accountable. Personally, I’m curious, reflective, and respectful of different cultures and ways of thinking. I believe the best results come from combining strong execution with empathy and inner stability.

If you’re looking for someone who delivers, adapts quickly, and stays calm when things get complex — while still being genuinely human — we’ll work well together.

14 years
Professional Experience
6+
Major Companies
20+
Technologies Mastered
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Key Achievements

Highlights of my professional journey and impact on projects

1
AI Framework Development
Mercor
Developed and implemented a scalable evaluation framework that became the project-wide standard for benchmarking AI models at Mercor, reducing the task cycle by 30%.
2
LLM-Generated Applications Enhancement
Mercor
Improved quality and reliability of LLM-generated web applications through systematic evaluation and optimization strategies at Mercor.
3
Leadership in Internal Projects
Beeline
Took a leading role in internal projects at Beeline, optimizing resource management.
4
UX/UI Collaboration Excellence
Beeline
Played a crucial role in collaboration with UX/UI designers, ensuring seamless integration of design and functionality across platforms.
5
Successful Migration Leadership
UBS
Successfully led the migration not only to TypeScript but also to a new CSS framework, improving maintainability and scalability in AI-Driven platform.
6
Performance Optimization
UBS
Optimized algorithms that reduced processing time by 90%, significantly improving system performance in AI-Driven platform.
7
Product Development Impact
Beeline
Established a position where I had a direct impact on product development, with my insights influencing future implementations and strategic decisions.
8
Stakeholder Management
Notch
Delivered comprehensive technical documentation and precise estimations that secured full stakeholder buy-in, effectively de-risking the project and paving the way for a smooth implementation phase.
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Professional Experience

A journey through innovation, leadership, and technical excellence

Notch
Frontend Lead
September 2025 - PresentRemote
  • Spearheaded the discovery phase for a strategic client from Saudi Arabia
  • Responsible for a comprehensive analysis of the existing technology ecosystem (React, React Native, Next.js, Redux) to identify opportunities for optimization and growth
  • Led technical workshops with stakeholders to define and solidify functional and non-functional requirements
  • Developed precise time and resource estimates for the full project implementation lifecycle, including a thorough technical risk assessment
  • Designed and proposed scalable, high-performance enhancements to the frontend architecture to ensure the product's long-term business value
  • Established the foundation for the future development process, including defining coding standards and best practices for the engineering team
ReactReact NativeNext.jsReduxArchitectureLeadership
Toptal
Senior Software Engineer
May 2025 - September 2025Remote
  • Strategic Technology Planning: Advise on technology stack selection, solution architecture. Analyze business goals to translate them into specific technical requirements
  • Technical Oversight and Project Execution: Establishing code quality standards, best practices, and implementing CI/CD processes
  • Architecture and Development in an Internal Startup: Play a key role in the development of an innovative internal project, where I have a direct and decisive impact on the system's architecture
ReactGraphQLJestTypeScriptNext.jsZustandTailwindAI ToolsChatGPT Pro
Beeline
Senior Software Engineer
April 2021 - May 2025Remote
  • Spearheaded multiple internal initiatives to improve business operations and user experience within the company's Vendor Management System (VMS)
  • Worked closely with UX/UI designers to develop user-friendly solutions that streamlined workforce management for a U.S.-based client
  • Responsible for full-cycle development, from early-stage consultations to implementation and monitoring of feature performance
  • Managed key elements of design system, including design tokens, ensuring consistency and scalability across projects
  • Worked extensively with Storybook to document, test, and streamline UI components for better developer and designer collaboration
ReactGraphQLREST APITypeScriptJestWDIOStorybookMaterial UIDesign SystemNx
UBS
Software Engineer
April 2019 - April 2021Remote
  • Led the transition from JavaScript to TypeScript and restructured the UX/UI architecture for an AI-powered data extraction platform
  • Successfully migrated the project to a new CSS framework, improving maintainability and consistency across the application
  • Implemented optimized algorithms that reduced processing time by 90%, significantly enhancing performance
JavaScriptReactTypeScriptReduxAnt DesignAIWebpackMicroservices
Sofomo
Front-end Developer
April 2018 - April 2019Remote
  • Played a key role in developing an e-commerce platform for Land Rover smartphones, optimizing performance and responsiveness
  • Contributed to a U.S.-based medical recruitment platform by maintaining core functionalities, improving UI accessibility
ReactJavaScriptReduxWordPressCSSBootstrapWebpack
Chili IT Expert Filip Sokolowski
Freelancer
2012 - PresentRemote
  • Developed scalable, high-performance applications and websites for a variety of clients, specializing in modern front-end technologies
  • Built and customized CMS-based websites using WordPress, focusing on SEO and SEM optimizations
  • Ensured websites and applications met high standards for usability, security, and performance
WordPressJavaScriptVueCSSNode.jsExpressReactMongoDBFirebaseCI/CD
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Consulting & Advisory

Providing expert guidance on technology strategy and implementation

Mercor
AI Model Evaluator - LLM evaluation
2025 - Present
  • Consulting for a top-tier AI company from the US
  • Improving LLM-generated web applications
  • Implementing a scalable evaluation framework for benchmarking AI models
  • Provide consulting services in developing new innovative web technologies, focusing on selecting the right tools, designing implementation strategies
AILLMWeb TechnologiesConsulting
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Skills & Expertise

A comprehensive toolkit for building modern web applications

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Technical Skills
JavaScriptTypeScriptReactReduxGraphQLREST APIJestTesting LibraryWDIONode.jsCI/CDStorybookGitHubGitLabConfluenceJiraWebpackFigmaViteCopilotChatGPT ProGemini ProReact RouterMaterial UIDesign SystemNext.jsTailwind CSS
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Soft Skills
Problem-solvingAttention to detailResponsibilityTeamworkFlexibilityPerseveranceLeadershipMentoringCommunicationCollaborationAdaptabilityInnovationCritical thinkingTime managementProject management
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Languages
PolishNative
EnglishAdvanced
JapaneseBeginner
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What I Love
Family timeLearning (Japanese!)GamesMoviesTravelingRunningYoga
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Education

Master's Degree in IT and Econometrics

Wrocław University of Economics and Business

2009-2016Wrocław, Poland

Get In Touch

I'm always open to discussing new opportunities, collaborations, or just having a chat about technology

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Location

Wrocław, Poland • B2B Remote Contract

Connect With Me