Senior Product Engineer (Remote, Full-Time), PK [AS240]

About Smart Working

At Smart Working, we believe your job should not only look right on paper but also feel right every day. This isn’t just another remote opportunity - it’s about finding where you truly belong, no matter where you are. From day one, you’re welcomed into a genuine community that values your growth and well‑being.

Our mission is simple: to break down geographic barriers and connect skilled professionals with outstanding global teams and products for full-time, long-term roles. We help you discover meaningful work with teams that invest in your success, where you’re empowered to grow personally and professionally.

Join one of the highest-rated workplaces on Glassdoor and experience what it means to thrive in a truly remote-first world.

About the Role

We are looking for a Senior Product Engineer with proven experience working in high-performing venture capital-backed startups to help shape and build the next generation of impactful technology products used by thousands of users every day. This is a highly collaborative and hands‑on engineering role where you will work across infrastructure, backend, frontend, and AI-powered systems. You will partner closely with Product, Design, Commercial, Analytics, and Operations teams to design and deliver meaningful features that solve real-world problems.

The role offers a high degree of ownership and autonomy within a fast-moving environment that values pragmatism, experimentation, and continuous improvement. You will help evolve modern AI-enabled products and internal tooling while contributing to architectural decisions, platform scalability, and engineering best practices.

The team currently works with technologies including Ruby on Rails, TypeScript, PostgreSQL, React, GCP, OpenAI, and Claude, while remaining flexible and open to evolving the stack as the platform grows.

This role is best suited to a senior engineer who is comfortable operating independently, making technical and product decisions, and contributing meaningfully across the entire product lifecycle within ambitious, fast-scaling startup environments.

Responsibilities

• Design, build, and maintain scalable full stack applications across frontend, backend, and infrastructure layers
• Collaborate with Product, Design, Commercial, and Analytics teams to define and deliver impactful new features
• Build internal tools and operational systems that improve efficiency and scalability across the organisation
• Develop and integrate AI-powered workflows and LLM-based solutions using modern generative AI tooling
• Explore, evaluate, and optimise the use of LLMs and AI systems across products and internal processes
• Contribute to architectural decisions, scalability improvements, and ongoing platform evolution
• Build high-quality user experiences using modern frontend technologies and design systems
• Design and maintain reliable backend systems, APIs, and data structures
• Work across evolving technologies and help identify the right tools and approaches for different problems
• Participate in retrospectives, knowledge sharing, and continuous improvement initiatives
• Foster a collaborative, inclusive, and psychologically safe engineering culture
• Contribute to delivering products that create meaningful real-world impact for end users

Requirements

• 6+ years of professional software engineering experience across frontend and backend systems
• 4+ years of experience building and maintaining production‑grade full stack applications
• 3+ years of experience working with modern frontend frameworks such as React and TypeScript
• 3+ years of backend development experience with technologies such as Ruby on Rails, Node.js, Python, or similar
• 3+ years of experience working with relational databases such as PostgreSQL
• 2+ years of experience working with cloud platforms such as GCP, AWS, or Azure
• Proven experience working within a venture capital-backed startup environment based in the US or UK
• Experience operating in fast-paced, high-growth product organisations with evolving priorities and rapid delivery cycles
• Proven experience building and scaling complex software systems in production environmentsStrong understanding of scalable architecture, system design, data structures, and maintainable software engineering practices
• Practical experience using AI development tools and LLM platforms such as OpenAI, Claude, Cursor, Copilot, or similar within day-to-day engineering workflows
• Experience integrating APIs and third‑party systems into production applications
• Strong product mindset with the ability to balance technical decisions against customer and business outcomes
• Experience working in cross‑functional product environments alongside Product Managers, Designers, and stakeholders
• Ability to work independently and take ownership of projects from idea through production delivery
• Strong communication and collaboration skills
• Pragmatic engineering approach with strong problem‑solving capability and sound technical judgment
• Entrepreneurial mindset with a proactive, delivery-focused attitude

Nice to Have

• Experience building AI-native or AI-enhanced applications
• Experience with Ruby on Rails in production environments
• Experience with GCP infrastructure and cloud‑native architectures
• Experience with shadcn or modern component design systems
• Experience designing and building internal operational tooling
• Exposure to infrastructure, DevOps, or platform engineering practices
• Experience working in mission-driven or social impact technology companies
• Experience contributing to engineering culture, mentoring, and process improvement initiatives

At Smart Working, you’ll never be just another remote hire.

Be a Smart Worker - valued, empowered, and part of a culture that celebrates integrity, excellence, and ambition.

If that sounds like your kind of place, we’d love to hear your story.