About Mark
B2B Software Service Provider
Freelancer / Contractor
In Spanish: Autonomo
My portfolio | Mi portafolio:
I am a B2B software contractor from London with 20 years of professional experience delivering enterprise-grade solutions across Frontend and Backend development. Now based in Spain with an EU-registered company, I provide professional services to clients in the UK, Spain, and wider EU regions.
☑ Core Expertise
- Frontend Architect & Development Specialist: AI-powered UIs, TypeScript, JavaScript, Angular + NgRx, React/Redux/RxJS, Frontend & Application Architecture, UI Design Systems, HTML, SASS, Styled Components
- Backend Development: AI / LLM Integration, Python, Node.js, Java (Spring Boot, Spring Cloud, JPA), AWS Lambda, REST APIs
- Databases: SQL & NoSQL solutions
- Cloud: AWS (serverless & cloud-native architectures)
I specialize in building scalable, high-performance web applications, modernizing existing platforms, and supporting businesses with frontend architecture, backend integrations, and cloud infrastructure.
☑ Otros servicios / other services
- ✓ Advanced Imaging for ads,
- ✓ Adobe Creative Suite
☑ Professional Development Cycle
- ✓ Agile Methodology,
- ✓ Scrum & Kanban,
☑ Knowledgeable
- ✓ AI Foundations
Including but not limited to:
Industries: Banking & Finance | Science & Energy | Royal Institutions | Luxury | Travel & Tourism | Advertising | FMCG | Telecommunication | Defense | Media & Entertainment| Governments & EU Institutions | start-up technologies & a lot more.
incluyendo pero no limitado a:
Industra: Finanza y Bancos | Ciencia y Energía | Instituciones reales | Lujo | Viajes y tourismo | Publicidad | Telecommunication | Defensa | entretenimiento y medios | Gobiernos e instituciones de la UE | startups tecnológicas y mucho mas.
English
Native or bilingual
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- ZürichSenior Frontend Architect / React UI DeveloperBANKING AND INSURANCENovember 2025 - January 2026 (2 months)Barcelona, SpainI was hired as a interim developer to accelerate delivery of UI, Design Systems, scalable architecture, and reusable components for an AI-driven insurance platform, including ways to show prompt & AI insights, extracted data & compare, underwriter collaboration document editing and more.Frontend development & Architecture:
- Maintained and enhanced a proprietary AI Extraction UI, contributing to frontend architecture, UI & component developments and scalability patterns.
- Built an on-brand UI Design System & architected it and coded reusable UI lib of components to ensure consistency across teams.
- Improved React frontend architecture, UI systems, and API integration, including data manipulation, styled-components, Material UI (MUI), Storybook, and collaborated with the designers to resolve brand or style inconsistencies in Figma/FigJam
- Worked with build tools and configuration scripts (Node.js, Bash) to streamline CI/CD and deployment workflows.
Cloud & Backend Collaboration:- Supported Azure Cloud environments and frontend API development.
- Worked closely with a Python/FastAPI backend, running services locally to support UI development, integration, and end-to-end validation.
- Implemented and maintained enterprise authentication flows to ensure secure user access and compliance with organisational standards.
- leveredged AI to automate routine tasks.
Agile & Team Practices:- Conducted code reviews, pull requests, and maintained higher engineering standards using Git, Azure DevOps, Jira.
- Worked within Agile/Scrum, attending daily stand-ups and coordinating tasks with the team to drive sprint progress.
- Capgemini Insurance SPAIN
On Malt
Fullstack DeveloperBANKING AND INSURANCEAugust 2024 - June 2025 (11 months)Barcelona, SpainHad the opportunity to meet the teams BCN & France, interesting industry Insurance.Fullstack development with:• Python FastAPI API development and AWS Lambda development,• MongoDd, Mongo Atlas, Pymongo development, WCAG2.2 AA compliant,• React Components, React frontend architecture, React UI design system development,• React-Query, styled-component, React MUI (Material UI), Figma, Unit Tests (React Testing Library),• AWS Cloud: development, maintenance, deployments, logs etc, API Gateway etc,• Agile methodology, scrum, backlog refinement etc, active in daily meetings etc,• usual tools etc: github, pull request etc, code reviews, Jira, confluence etc,• AWS Cloud development with: Python Lamdas, API Gateway, CodePipeline, Cloudwatch etc, AmazonQ, Github Copilot. - Banco SantanderFull Stack Developer - Java, AngularBANKING AND INSURANCEAugust 2023 - February 2024 (6 months)Remote, United StatesFull stack developer, Java, java spring boot, spring cloud gateway, java encryption, description, data conversions & API Security, spring boot, databases & more
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Education
- AI Engineer Core Track: LLM Engineering, RAG, QLoRA, Agentsonline courses2026AI Engineer Core Track: LLM Engineering, RAG, QLoRA, Agents
- Java & Java Spring BootOnline Course2022Core Java & Java Spring Boot