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Unlimit

Solution Architect (Angular+Node.js+AI)

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Date Posted

Department

Architecture

Location

Belgrade

About Unlimit
Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform.
Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses.
Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy.

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

Join Unlimit Team now!
Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.
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