Senior Frontend Engineer – Greenfield Product (Angular)
Senior Frontend Engineer – Greenfield Product (Angular)
Freelance Contract | 9–12 months
Remote from Brazil
About the Project
Castle Tech GmbH is building a new standalone product from the ground up and is looking for an experienced Senior Frontend Engineer (Angular) to join us on a freelance basis for 9–12 months.
This is a high-impact engagement where you will influence system design, architecture, and product direction from day one. You will work closely with product and engineering to turn ideas into production-ready software while setting the foundation for how the system evolves.
If you enjoy building products from scratch, designing clean architectures, and taking ownership of meaningful projects, this contract will allow you to make a real impact.
What You'll Work On
Build a new production-grade product from the ground up
Design and implement a scalable frontend architecture using Angular and TypeScript
Take ownership of features from concept to deployment
Collaborate closely with product managers, designers, and backend engineers
Contribute to technical architecture and system design decisions
Help establish development standards, CI/CD pipelines, and engineering best practices
Mentor other engineers through code reviews and technical feedback
Continuously improve development workflows using modern tools and AI-assisted engineering
AI-Augmented Engineering
AI is part of how we work. We expect engineers to actively use modern AI tooling to improve productivity and quality.
You should be comfortable:
Using AI-assisted development tools in your daily workflow
Writing effective prompts and evaluating AI-generated output critically
Identifying AI limitations and failure modes
Exploring modern AI workflows and tools
This is not about blindly accepting AI suggestions — it's about using AI thoughtfully to work smarter and build better systems.
Your Skills
Must Have
5+ years of experience as a frontend engineer
Strong expertise with Angular (v11+) and TypeScript
Experience designing scalable frontend architectures
Strong understanding of software design principles and maintainable systems
Experience with modern frontend tooling (NPM, Webpack or esbuild)
Experience working with Git, CI/CD pipelines, and Docker
Experience working in agile teams (Scrum or Kanban)
Strong communication skills in English (written and verbal)
Availability for 9–12 months, starting as soon as possible
Comfortable working remotely with European time zone overlap (able to attend meetings during CET/CEST business hours)
Nice to Have
Experience with frontend testing frameworks (Jest, Cypress, Playwright)
Experience building greenfield products or new platforms
Familiarity with AI-related components such as RAG or vector databases
Experience with Material Design or product-oriented UI development
Conversational German
Previous experience working with European clients or distributed teams
What You'll Own
As a Senior Engineer, you will play an important role in shaping both the technology and the team.
You will:
Design systems with clear component boundaries and scalability in mind
Identify technical risks and propose practical solutions
Help improve the team's engineering standards and productivity
Mentor other engineers and contribute to technical decision-making
Deliver high-impact features that support business and product goals
Contract Details
Duration: 9–12 months (with potential for extension)
Location: Remote from Brazil
Start date: ASAP
Engagement type: Freelance / Contract (B2B or international contractor agreement)
Work arrangement: Fully remote with expected overlap during European business hours (CET/CEST)
Time zone: Flexible, with core collaboration hours aligned to Central European Time
Why Work With Castle Tech?
Build something new – work on a greenfield product from the start
Real technical ownership – influence architecture and system design
Modern engineering environment – use the latest tools and workflows
Collaborative team – work with experienced engineers, product managers, and designers
Remote-first mindset – async-friendly culture with clear communication practices
International exposure – work with a European tech company from Brazil
Apply To This Job
Freelance Contract | 9–12 months
Remote from Brazil
About the Project
Castle Tech GmbH is building a new standalone product from the ground up and is looking for an experienced Senior Frontend Engineer (Angular) to join us on a freelance basis for 9–12 months.
This is a high-impact engagement where you will influence system design, architecture, and product direction from day one. You will work closely with product and engineering to turn ideas into production-ready software while setting the foundation for how the system evolves.
If you enjoy building products from scratch, designing clean architectures, and taking ownership of meaningful projects, this contract will allow you to make a real impact.
What You'll Work On
Build a new production-grade product from the ground up
Design and implement a scalable frontend architecture using Angular and TypeScript
Take ownership of features from concept to deployment
Collaborate closely with product managers, designers, and backend engineers
Contribute to technical architecture and system design decisions
Help establish development standards, CI/CD pipelines, and engineering best practices
Mentor other engineers through code reviews and technical feedback
Continuously improve development workflows using modern tools and AI-assisted engineering
AI-Augmented Engineering
AI is part of how we work. We expect engineers to actively use modern AI tooling to improve productivity and quality.
You should be comfortable:
Using AI-assisted development tools in your daily workflow
Writing effective prompts and evaluating AI-generated output critically
Identifying AI limitations and failure modes
Exploring modern AI workflows and tools
This is not about blindly accepting AI suggestions — it's about using AI thoughtfully to work smarter and build better systems.
Your Skills
Must Have
5+ years of experience as a frontend engineer
Strong expertise with Angular (v11+) and TypeScript
Experience designing scalable frontend architectures
Strong understanding of software design principles and maintainable systems
Experience with modern frontend tooling (NPM, Webpack or esbuild)
Experience working with Git, CI/CD pipelines, and Docker
Experience working in agile teams (Scrum or Kanban)
Strong communication skills in English (written and verbal)
Availability for 9–12 months, starting as soon as possible
Comfortable working remotely with European time zone overlap (able to attend meetings during CET/CEST business hours)
Nice to Have
Experience with frontend testing frameworks (Jest, Cypress, Playwright)
Experience building greenfield products or new platforms
Familiarity with AI-related components such as RAG or vector databases
Experience with Material Design or product-oriented UI development
Conversational German
Previous experience working with European clients or distributed teams
What You'll Own
As a Senior Engineer, you will play an important role in shaping both the technology and the team.
You will:
Design systems with clear component boundaries and scalability in mind
Identify technical risks and propose practical solutions
Help improve the team's engineering standards and productivity
Mentor other engineers and contribute to technical decision-making
Deliver high-impact features that support business and product goals
Contract Details
Duration: 9–12 months (with potential for extension)
Location: Remote from Brazil
Start date: ASAP
Engagement type: Freelance / Contract (B2B or international contractor agreement)
Work arrangement: Fully remote with expected overlap during European business hours (CET/CEST)
Time zone: Flexible, with core collaboration hours aligned to Central European Time
Why Work With Castle Tech?
Build something new – work on a greenfield product from the start
Real technical ownership – influence architecture and system design
Modern engineering environment – use the latest tools and workflows
Collaborative team – work with experienced engineers, product managers, and designers
Remote-first mindset – async-friendly culture with clear communication practices
International exposure – work with a European tech company from Brazil
Apply To This Job