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Open to freelance & full-time

Eigirdas Skruolis

Senior Software Engineer · Full-Stack

I build and ship production web software end to end — React and Next.js frontends, Node.js APIs, PostgreSQL, auth, and cloud deployment. Most recently the first frontend engineer at a Swiss SaaS platform trusted by major banks and insurers — built from zero to production. I deliver at AI speed with agentic workflows — directed and reviewed by me at every step.

Start a project
years shipping production software
8+
years shipping production software
platforms delivered end to end
15+
platforms delivered end to end
LCP — cut from 4.2s to 1.8s
-57%
LCP — cut from 4.2s to 1.8s
WCAG conformance, enterprise-grade
100%
WCAG conformance, enterprise-grade

Built products relied on by teams at

  • UBS
  • Raiffeisen
  • Generali
  • Nestlé

Services

What I can build for you

I work across the full stack — greenfield products, rescues, migrations, and performance work on existing codebases. Available as a freelancer or contractor, and equally open to committing full-time to one ambitious product.

Full-stack product engineering

From empty repo to production: I design, build, and ship complete web products — frontend, API, database, auth, and deployment. I did exactly this as the first frontend engineer at a Swiss SaaS now relied on by major banks.

  • React / Next.js applications
  • Node.js REST APIs + PostgreSQL
  • Authentication & session architecture
  • AWS / Vercel deployment with CI/CD

Frontend architecture & migrations

Legacy stack slowing you down? I plan and execute framework migrations without stopping feature delivery — I led a full Angular → React/Next.js migration to production inside a live enterprise product.

  • Angular → React / Next.js migrations
  • Monorepo architecture (Turborepo)
  • Design systems + Storybook
  • Migration strategy that ships incrementally

Performance & accessibility

Speed and compliance as measurable outcomes, not vibes. I profile, restructure, and optimise until Core Web Vitals are green — and I have delivered 100% WCAG conformance for banking-grade clients.

  • Core Web Vitals optimisation (LCP, CLS)
  • Bundle & network-waterfall reduction
  • WCAG accessibility audits & fixes
  • Caching & CDN strategy

AI-accelerated delivery

I build with agentic AI workflows — but I direct every step, review every line, and own the result. You get senior-engineer quality at a pace a traditional team of one cannot match.

  • Agentic development workflows
  • Rapid prototyping → production hardening
  • Figma-to-code pipelines
  • AI tooling & workflow consulting

How I work

AI-accelerated. Engineer-directed.

I transitioned early into agentic AI development — not to replace engineering judgement, but to multiply it. Agents do the typing; I do the thinking, the reviewing, and the shipping.

  1. AI drafts. I decide.

    Agents generate code fast — but every architectural choice, trade-off, and merge is mine. Eight years of production experience is the filter the output goes through.

  2. Spec before code

    I write precise specifications — requirements, constraints, edge cases — before any agent runs. Tight direction in, quality out. Vague prompts produce vague software.

  3. Guardrails everywhere

    Type-safe schemas, tests, linting, and CI gate everything AI touches. Nothing lands on main without passing the same bar I hold hand-written code to.

  4. Speed you can measure

    The result is a delivery pace that used to need a small team — without sacrificing code review, accessibility, or performance budgets.

Skills

A full-stack toolkit

Most of the technologies out there, one engineer. If your stack isn't listed, I've probably shipped something adjacent to it — adapting fast is the actual skill.

Frontend

React
Next.js
Angular
RxJS
Tailwind CSS
Storybook

Backend & Data

Node.js
REST API design
PostgreSQL
Redis
MySQL

Languages & Core

TypeScript
JavaScript (ES6+)
PHP
SQL
HTML & CSS

Auth & Infrastructure

AWS
Vercel
CI/CD
Turborepo
Git
Ory SDK

Engineering Practices

Accessibility (WCAG)
Core Web Vitals
Design systems
Testing (Vitest / RTL)
Figma

AI-Assisted Development

Agentic workflows
Claude
AI pair-programming
Figma-to-code

Experience

Where I've shipped

  1. 2023 — Present

    Hypt AG

    Senior Frontend Engineer

    Swiss conversational-feedback SaaS serving UBS, Raiffeisen, Generali, and Nestlé. Joined as the first frontend engineer and built the entire product from zero alongside a single backend engineer.

    • Architected and built the entire frontend, CI/CD pipelines, and core product from zero — now relied on by major Swiss banking and insurance enterprises.
    • Co-designed and shipped the full REST API with the CTO — powering the funnel builder and real-time analytics dashboards, backed by PostgreSQL.
    • Engineered the Chatbot Builder end-to-end: a fully customisable funnel builder with RxJS-based state management, from product design to delivery.
    • Implemented the authentication architecture with Ory SDK — full auth flow, session and cookie handling across the platform.
    • Delivered 100% WCAG accessibility conformance, meeting the strict standards required by enterprise banking clients.
    • Drove the stack migration to React + Next.js + Tailwind within a Turborepo monorepo — researched, built the case, and shipped to production.
    ReactNext.jsTypeScriptNode.jsPostgreSQLTailwind CSSTurborepoOry SDKAWS

  2. 2018 — 2022

    Two Flamingos Ltd.

    Full-Stack Developer

    Manchester, UK digital agency. Delivered 15+ corporate and e-commerce platforms end to end, from architecture to deployment.

    • Specialised in performance optimisation for global brand clients — including cutting LCP from 4.2s to 1.8s and bundle size by ~35% on production platforms.
    • Integrated complex third-party APIs into production environments.
    • Worked directly with clients to translate business requirements into technical decisions.
    JavaScriptTypeScriptPHPMySQLREST APIsCSS

  3. 2017 — 2018

    Freelance

    Frontend Developer

    Web development and UI services for London-based clients — foundation built through self-directed learning and real project delivery.

    JavaScriptHTML & CSSWordPress

Work

Selected work & projects

Client work lives behind NDAs and logins — the case studies tell the story. The GitHub tab pulls my public repos live.

  • Chatbot Builder

    Hypt AG

    A fully customisable conversational funnel builder — drag-and-drop flows, real-time preview, brand theming, analytics. Built end-to-end as the first frontend engineer; serves UBS, Raiffeisen, Generali, and Nestlé.

    AngularRxJSTypeScriptREST APIs
    Read case study

  • Angular → React Migration

    Hypt AG

    Proposed, planned, and led the full migration of a live enterprise product to React + Next.js + Tailwind in a Turborepo monorepo — shipped to production without pausing feature delivery.

    ReactNext.jsTypeScriptTurborepo
    Read case study

  • Performance Optimisation at Scale

    Two Flamingos Ltd.

    Cut LCP from 4.2s to 1.8s and bundle size by ~35% on production client platforms — through waterfall profiling, code-splitting, lazy-loading, payload trimming, and caching/CDN strategy.

    Core Web VitalsJavaScriptCaching & CDN
    Read case study

  • REST API & Auth Architecture

    Hypt AG

    Co-designed the platform REST API with the CTO — PostgreSQL-backed, powering the funnel builder and real-time analytics. Implemented the full auth architecture with Ory SDK.

    Node.jsPostgreSQLOry SDKREST APIs

  • Design System & Figma Migration

    Hypt AG

    Co-established a Figma-based design system with the in-house designer — component libraries, design tokens, and the team transition from Adobe XD to Figma as single source of truth.

    FigmaDesign systemsStorybook

  • Corporate & E-commerce Platforms

    Two Flamingos Ltd.

    15+ end-to-end platforms for global brand clients — architecture to deployment, performance optimisation, and complex third-party API integrations.

    JavaScriptPHPMySQLCSS
Open to freelance & full-time

Contact

Let's build something

I'm open to freelance and contract work — or committing my time fully to one big project as part of your team. Full products, migrations, performance rescues, or a senior full-stack hire. Tell me what you're building and I'll tell you honestly whether I'm the right person for it.

Or reach me directly

eskruolis@gmail.comlinkedin.com/in/eskruolisgithub.com/eskruolis

Based in Valencia, Spain (CET) — working with teams across Europe and beyond.