About the Role
We are looking for a Solution Architect / Agentic Systems Engineer Lead to join our Design Team. You will own the technical architecture for web products in the acquiring business line — payment pages, merchant dashboards, marketing websites — and lead the design and implementation of AI-powered automation pipelines that transform how the team works: from design-to-code generation to automated QA and design system management.
This is not a pure coding role. You will make architectural decisions, design multi-agent systems, build automation infrastructure, and mentor a small team of AI-native developers and designers.
Responsibilities
Architecture & Technical Leadership
- Define and own technical architecture for web products: payment pages (Angular SPA),
merchant dashboards (Angular/NestJS), marketing websites (PHP/JS/SCSS)
- Make technology decisions, document them (ADRs), and maintain the team's tech radar
- Design APIs and data flows between frontend, BFF (NestJS), and backend services
(PostgreSQL, MongoDB, Redis, Oracle)
- Ensure PCI DSS compliance in payment-facing interfaces
- Conduct architecture reviews, lead technical discussions, mentor developers
Agentic Systems & AI Automation
- Design and implement multi-agent pipelines that automate team workflows:
design-to-code, design system audit, visual QA, component generation
- Build and maintain MCP servers and tool integrations for AI agents used by the team
- Architect the Design System as Code pipeline: Figma → Tokens → Components → Code → QA,
with AI at every stage
- Implement LLM integration patterns: structured output, function calling, RAG,
retry/fallback strategies
- Ensure AI system reliability: hallucination detection, output validation, graceful
degradation
Design System & Infrastructure
- Own the technical side of the shared component library (Elemental UI): architecture, token system, theming, versioning
- Design and maintain CI/CD pipelines (GitLab CI, Docker) with AI-powered checks (visual
regression, accessibility, code quality)
- Manage iFrame integration patterns and cross-origin communication for embedded
interfaces
AI-Native Skills
- Multi-agent systems & AI tooling (agents, MCP, orchestration, tools)
- LLM integrations (RAG, function calling, structured outputs, validation)
- AI-driven automation pipelines (design-to-code, design systems, CI/CD)
- AI reliability & prompt engineering (fallbacks, hallucination control, system prompts)
What You’ll Be Doing
- 5+ years of commercial experience in full-stack or backend development, with at least 2
years in an architect or tech lead role
- Proven experience designing system architecture — APIs, data flows, service
interactions, not just writing code
- Strong knowledge of TypeScript, Angular, Node.js/NestJS
- Experience with PostgreSQL, MongoDB, Redis in production — schema design, query
optimization, caching strategies
- Proficiency with Docker and GitLab CI/CD — building and maintaining pipelines, not just
using them
- Hands-on experience with LLM APIs (OpenAI, Anthropic, or similar) — building real
integrations, not just prompting in a chat
- Understanding of agent frameworks and patterns (LangChain, CrewAI, Claude Code, MCP, or
similar)
- Experience designing and maintaining component libraries or design systems
- Knowledge of SOLID, DDD, and ability to make pragmatic architectural trade-offs
- Strong communication skills — ability to explain technical decisions to designers, POs,
and stakeholders
Skills Required
- 5+ years of commercial experience in full-stack or backend development
- 2+ years in an architect or tech lead role
- Strong knowledge of TypeScript, Angular, Node.js/NestJS
- Proficiency with Docker and GitLab CI/CD
- Hands-on experience with LLM APIs (OpenAI, Anthropic, etc.)
- Understanding of agent frameworks and patterns
- Experience designing and maintaining component libraries or design systems
What We Do
From London to Singapore and from San Francisco to São Paulo, we help businesses enter new markets, explore new industries, and reach new milestones. We are driven by a deep-seated determination to be the best possible partner for our customers – giving you the support you need to capitalize on a world that’s changing at breakneck speed. Our mission is to provide innovators with a convenient and simple financial interface that enables payments to flow freely and invisibly across borders. We offer a wide range of services, including payment gateway, card acquiring, business accounts, card issuing, alternative payment methods, and more. That’s the reason why we are called Unlimit: we provide unlimited growth opportunities for our customers, freeing them from the payment constraints. Unlimit - Borderless Payments
