Full-stack Engineer

• Own the technical delivery of demanding enterprise AI builds end to end
• Shape technical scope, solution approach, team composition, timeline, proposals, and estimates
• Lead architecture, document technical decisions, review engineering work, and manage progress, trade-offs, and risks
• Build prototypes, hard integrations, and critical-path fixes when needed
• Deliver production-grade systems, including agentic systems, LLM-powered services, and supporting platforms
• Serve as the client's technical counterpart and explain technical decisions to non-technical stakeholders
• Navigate enterprise approvals, platform teams, security reviews, and organizational constraints
• Work on internal tooling and templates between client builds
• Mentor engineers on project teams
• Report directly to the Engineering Director
• Run one flagship build nearly full-time or two or three smaller builds concurrently, depending on the portfolio

Tech Lead

• Develop and maintain backend services and APIs using Java/Kotlin with Spring Boot or Node.js/TypeScript
• Build web applications and features using React and TypeScript, using the design system and shared components
• Design data models and work with SQL and NoSQL databases
• Integrate services through REST APIs and messaging systems such as Kafka, NATS, or RabbitMQ
• Containerise and deploy applications with Docker and Kubernetes
• Contribute to CI/CD pipelines
• Write automated tests across the stack and participate in code reviews
• Use AI coding assistants effectively while maintaining ownership of quality, security, and maintainability
• Monitor and improve production features, focusing on quality, performance, and security
• Collaborate with the team and other teams on technical decisions and knowledge sharing
• Work across APIs, data, and user interfaces in an agile team alongside product, UX, and platform engineers

Full Stack Software Engineer

• Design, develop and maintain backend services and APIs using Java/Kotlin with Spring Boot or Node.js/TypeScript
• Build scalable, resilient services following clean architecture, domain-driven and event-driven principles
• Design data models and work with SQL and NoSQL databases
• Implement asynchronous communication between services using Kafka, NATS or RabbitMQ
• Containerize and deploy services with Docker and Kubernetes and contribute to CI/CD pipelines
• Write automated unit, integration and contract tests and participate in code reviews
• Use AI coding assistants effectively while maintaining ownership of quality, security and maintainability
• Monitor and improve production services, focusing on performance, security and observability
• Collaborate with teams on technical decisions, shared standards and knowledge sharing

Backend Software Engineer

• Design, build and operate backend services and APIs using Java/Kotlin with Spring Boot or Node.js/TypeScript
• Build high-quality web applications with React and TypeScript
• Contribute to the design system and micro-frontend architecture
• Drive architecture and design decisions for scalable, resilient and secure services
• Apply domain-driven and event-driven principles
• Design data models and choose storage across SQL and NoSQL databases
• Design asynchronous integrations using Kafka, NATS or RabbitMQ
• Own deployment and operation of services with Docker and Kubernetes
• Improve CI/CD pipelines and observability
• Drive testing strategy across unit, integration, contract and end-to-end testing
• Drive adoption of AI-assisted development and establish responsible team practices
• Mentor engineers, lead code reviews and promote engineering best practices across teams
• Own features end to end and shape technical direction across the stack

Senior Full Stack Software Engineer

• Design, build and maintain complex, large-scale web applications using React and TypeScript
• Own and evolve frontend architecture, including micro-frontend patterns, monorepo setup and shared component libraries
• Define state management and data-fetching strategies separating server, client and UI state
• Contribute to and help govern the design system with UX/UI designers, ensuring consistency, accessibility and reusability
• Integrate frontends with backend services and APIs, collaborating on API contracts, authentication flows and data models
• Drive web performance through rendering optimization, code splitting, bundle-size optimization and Core Web Vitals
• Ensure high standards for security, accessibility, internationalization and browser compatibility
• Define and drive frontend testing practices including unit, integration, visual regression and end-to-end testing
• Contribute to build tooling, CI/CD pipelines and containerized deployments with Docker and Kubernetes
• Drive adoption of AI-assisted development in the frontend and establish responsible workflows
• Mentor engineers, lead code reviews and drive technical decisions within and across teams

Senior Frontend Software Engineer

• Design, develop, and maintain robust frontend applications and scalable backend microservices
• Build resilient, high-performance REST and GraphQL APIs using clean architecture and event-driven design patterns
• Deploy, containerize, and manage applications on AWS
• Design and optimize relational and NoSQL database models to ensure data integrity and high availability
• Implement automated unit, integration, and end-to-end testing strategies
• Monitor production environments, troubleshoot complex technical issues, and participate in incident response
• Collaborate within a cross-functional international Agile/Scrum team
• Participate in technical specification refinement, code reviews, and architectural discussions
• Modernize core platforms and transition legacy architectures into a cloud-native, event-driven microservices ecosystem

Full-Stack Engineer – React, Node.js

• Lead and mentor a team of engineers, providing technical guidance and career development support.
• Own the architecture and development of full-stack applications using React, Next.js, and Node.js.
• Collaborate closely with product managers to translate requirements into actionable development tasks.
• Oversee CI/CD pipelines, ensuring smooth deployments and high system reliability.
• Design and implement scalable backend services leveraging AWS services.
• Drive best practices in coding standards, code reviews, and system architecture.
• Manage project timelines, prioritize tasks, and ensure on-time delivery.
• Deliver products supporting internal operations and market-facing initiatives.
• Work closely with cross-functional teams to shape and evolve the platform and digital experiences.

Lead Full-Stack Engineer – NodeJS

• Own the architecture and technical roadmap of all Whizz systems.
• Review every pull request before merge and keep a clear review standard.
• Design and maintain the database architecture across MySQL and PostgreSQL.
• Own Docker images, deployments and environments.
• Drive AI-assisted development across the team: agent instructions, prompts, rules for reviewing AI-generated code.
• Turn product requirements into technical tasks and mentor backend, frontend and mobile developers.
• Lead incident response and ship root-cause fixes.

Tech Lead, Russian Speaker

• Contribute to the next generation of social gaming
• Develop extraordinary virtual worlds and meaningful social experiences
• Build, iterate, and ship products used by millions of players
• Work across Unity/game development, backend and platform engineering, software engineering, or AI-focused technology disciplines
• Help define the future of social gaming and virtual experiences
• Collaborate with talented teams across Europe
• Solve unique technical challenges at scale

Software Engineer, Speculative

• Take technical ownership of the e-commerce platforms and their integrations
• Define, prioritize and manage the technology roadmap for the Webshop and other digital sales channels
• Contribute hands-on to the development and implementation of new features and improvements
• Define and continuously evolve the solution architecture, ensuring quality, security, scalability and maintainability
• Monitor platform performance, availability and reliability, while managing the application lifecycle
• Promote best practices across software development, documentation, testing and code quality
• Coordinate internal technical teams and external partners, ensuring alignment and smooth delivery
• Work closely with different stakeholders to translate business needs into effective and sustainable technical solutions

Full-stack Engineer jobs in Portugal