Kamil Balda
Senior Front-end Engineer
Professional Summary
Senior Front-end Engineer with nearly six years of professional experience building high-performance web applications. Currently at Tidio, developing user-facing features for a customer service platform used by 300,000+ businesses. Deep expertise in Next.js, React, and TypeScript across software houses, product companies, and agency environments. Experienced in cross-team collaboration with DevOps and SysOps — implementing Redis caching, configuring Cloudflare CDN, and optimising build pipelines. Actively leverages AI-assisted tools (Claude, ChatGPT, Cursor) to accelerate development workflows, improve code quality, and explore architecture solutions. Focused on clean architecture, maintainable code, and solving real production-level problems.
Work Experience
NextJS Web Developer
Jun 2023 — Present- Built new pages and reusable UI components for tidio.com with a strong focus on responsiveness across all devices.
- Wrote unit tests with Jest and React Testing Library; collaborated with the Data team on website tracking and user data flows.
- Contributed to the company rebranding — advising on component solutions and ensuring design consistency across the platform.
- Implemented Redis caching and configured Cloudflare CDN and proxy settings; optimised build pipelines in collaboration with SysOps and DevOps.
- Integrated AI-assisted tools (Claude, Cursor) into the daily development workflow — using them for code generation, refactoring, debugging, and accelerating research on unfamiliar technologies.
Front-end Developer
Nov 2022 — May 2023Fabrity — Leroy Merlin
- Developed a multi-stage contractor registration flow where each step dynamically adapted based on prior user inputs.
- Built a comprehensive user dashboard module for managing orders, owned equipment, and completed work.
- Implemented drag & drop sorting to improve UX efficiency; delivered fully responsive interfaces across all breakpoints.
Front-end Developer
Sep 2022 — Nov 2022Fabrity — PKO Bank Polski
- Implemented CMS changes and new features for iPKO, the digital banking platform of Poland's largest bank.
- Navigated a complex legacy codebase, ensuring all changes were backward-compatible and non-disruptive to production.
Front-end Developer
Oct 2021 — Sep 2022Acclaim
- iMakeable — Extended React Planner with wall snapping, multi-object selection, mirror image transformation, and project save/load from a database.
- Lyfstone — Upgraded all packages in a legacy React app, replaced deprecated dependencies, and added responsive mobile/tablet views.
- Piesotto — Developed new features for a dog catering Next.js app; implemented food ration calculation logic and reduced payload sizes.
- Endgame — Integrated a Next.js app with Sanity CMS; built Studio, schemas, GROQ queries, and connected external job listing providers.
- Crowd1 — Built a Next.js app from scratch (TypeScript, Redux, Emotion), delivering pixel-perfect pages from design mockups.
Front-end Developer
Mar 2021 — Sep 2021Avaus Marketing Innovations
- Created landing pages and email templates deployed across Marketo, Adobe Campaign, and Salesforce Marketing Cloud.
- Built Node.js applications for data exchange between Salesforce, Marketo, and internal systems via REST webhooks.
Front-end Developer
Jul 2020 — Mar 2021- Built WordPress websites from scratch, including sondasports.com and swiatnaraty.pl.
- Conducted performance audits and trained clients on content management workflows.
Web Developer
Aug 2018 — Apr 2020Infoshare Conference
- Maintained and extended infoshare.pl, adding new features, sub-pages, and layouts.
- Built a React/Firebase application from scratch for managing exhibitor stand orders at the conference.