Senior/Staff Frontend Engineer

Fonoa

ABOUT ENGINEERING AT FONOA Engineering is central to how we build the business. We focus on solving real customer problems, not just shipping features. We work in small, high-trust teams, with full ownership across the lifecycle, from design to production and beyond. We value: * Ownership – engineers own what they build end-to-end * Simplicity – we break down complex problems into clear solutions * Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems * Quality – scalable, maintainable systems are non-negotiable * Speed & iteration – we ship fast, learn, and improve continuously * Collaboration – we win as a team, not as individuals POSITION OVERVIEW As a Staff Engineer, your role is to improve the system as a whole, both technically and organizationally. You will work on ambiguous, high-impact problems, shape technical direction across teams, and help others build better systems. Your impact comes less from the code you write, and more from how you influence decisions, design, and execution at scale. WHAT YOU WILL DO * Take ownership of complex, cross-team problems that are not clearly defined * Define technical direction and drive system design across domains * Identify and address systemic issues and opportunities early * Simplify complexity through better architecture, patterns, and structure * Improve how teams build by raising standards, tooling, and practices * Mentor engineers and contribute to hiring and team growth * Ensure systems are reliable, scalable, and built for long-term evolution WHAT GOOD LOOKS LIKE * You focus on high-leverage problems and shape how they are approached * You create clarity in ambiguous situations and align teams around it * You improve not just code, but how teams design and build systems * You make others more effective through guidance, feedback, and direction * You operate with long-term thinking, balancing today’s needs with future scale * You adopt emerging AI technologies and create a culture of innovation in your teams At this level, you are expected to “make the whole system, and the people in it, better.” WHAT WE’RE LOOKING FOR * Strong experience designing and operating scalable backend systems * Proven ability to work on ambiguous, high-impact problems * Track record of influencing technical decisions beyond your team * Ability to balance speed, quality, and long-term maintainability * Experience mentoring engineers and improving team practices * Fostering a culture of curiosity and experimentation API DOCUMENTATION For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: https://docs.fonoa.com/ TECH STACK We use these technologies today, but we don’t hire for specific tools. We care about engineers who can understand problems, make good technical decisions, and choose the right tools for the job. * Backend: Node.js, Go * Frontend: React, TypeScript * Infrastructure: GCP, k8s, Terraform, Postgres Note: If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building a diverse and inclusive team. As part of the recruitment process at Fonoa, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.

Fonoa

ABOUT ENGINEERING AT FONOA Engineering is central to how we build the business. We focus on solving real customer problems, not just shipping features. We work in small, high-trust teams, with full ownership across the lifecycle, from design to production and beyond. We value: * Ownership – engineers own what they build end-to-end * Simplicity – we break down complex problems into clear solutions * Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems * Quality – scalable, maintainable systems are non-negotiable * Speed & iteration – we ship fast, learn, and improve continuously * Collaboration – we win as a team, not as individuals POSITION OVERVIEW As Fonoa continues to evolve its product capabilities, we are looking for a Senior or Staff Software Engineer to help us build AI-powered experiences that feel deeply integrated into the product, not layered on top of it. This is not a role focused on experiments disconnected from production. You will work on real customer-facing systems, building intelligent workflows, natural language interfaces, and agent-driven experiences that make complex problems simpler for our users and internal teams. You’ll work closely with engineering, product, and design to prototype, iterate, and scale new AI capabilities across the platform. This includes everything from designing backend systems that power AI workflows to shaping model behaviour, evaluation pipelines, and agent orchestration. We are still early in this journey, which means this role requires someone who is comfortable operating in ambiguity, experimenting quickly, and helping define how AI is applied across products and workflows. We are looking for engineers who combine strong product instincts with deep technical understanding, and who are excited about building practical AI systems that deliver real value. This is a highly collaborative, hands-on role for someone who enjoys owning problems end-to-end, moving quickly, and building systems that balance product experience, reliability, scalability, and long-term maintainability. WHAT YOU WILL DO * Build AI-powered product features that feel native, fast, and intuitive to use * Partner closely with product and design to prototype and iterate on intelligent workflows and user interactions * Design backend services powering natural language interfaces, smart suggestions, and agentic systems * Optimize prompts, shape model behaviour, and improve evaluation pipelines * Build and evolve internal and external agent platforms * Enable both technical and non-technical teams to leverage AI more effectively * Continuously experiment, iterate, and improve AI systems in production WHAT WE’RE LOOKING FOR * 5+ years building customer-facing products at a high-quality software company * Strong track record of delivering complex, end-to-end product features with visible impact * Ability to shape problems and drive solutions independently with high ownership * Deep understanding of LLMs, prompt engineering, agent frameworks, and AI safety/security practices * Experience with RAG architectures and model evaluation * Strong product and engineering instincts, with the ability to balance speed, quality, and pragmatism * Comfortable operating in fast-moving, ambiguous environments * Proven ability to experiment and deliver in an evolving technology landscape API DOCUMENTATION For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: https://docs.fonoa.com/ TECH STACK We use these technologies today, but we don’t hire for specific tools. We care about engineers who can understand problems, make good technical decisions, and choose the right tools for the job. * Backend: Node.js, Go * Frontend: React, TypeScript * Infrastructure: GCP, k8s, Terraform, Postgres Note: If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building a diverse and inclusive team. As part of the recruitment process at Fonoa, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.

Fonoa

Fonoa is the Tax Operating System for autonomous tax. AI that tracks every rule, acts on every obligation, and proves every decision, built on modular infrastructure. Fonoa’s modules cover the full indirect tax lifecycle: tax ID validation, real-time tax determination, e-invoicing, and returns. All on one shared data model and integration, with one audit trail. Each added capability makes the others stronger. Agents monitor obligations, populate returns, catch anomalies and assemble audit packs in seconds. The system does the work. Humans make the calls. That’s autonomous tax. We operate across 120+ countries, with clients going live in weeks, if not days. Trusted by Canva, Netflix, Spotify, Uber, Zoom and Booking.com. Rated 4.5/5 stars and a High Performer on G2 and 4.6/5 stars on Gartner Peer Insights. Find out more: www.fonoa.com ABOUT ENGINEERING AT FONOA Engineering is central to how we build the business. We focus on solving real customer problems, not just shipping features. We work in small, high-trust teams, with full ownership across the lifecycle, from design to production and beyond. We value: * Ownership – engineers own what they build end-to-end * Simplicity – we break down complex problems into clear solutions * Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems * Quality – scalable, maintainable systems are non-negotiable * Speed & iteration – we ship fast, learn, and improve continuously * Collaboration – we win as a team, not as individuals POSITION OVERVIEW As Fonoa continues to scale globally, we are looking for a Data Engineer to help us bootstrap an internal data platform from the ground up. Working closely with the Infrastructure team, you will play a foundational role in unlocking the value hidden across our different systems and make data accessible to both technical and non-technical stakeholders in a seamless way. This is not a role where you'll walk into a mature data stack with well-defined requirements. We have data spread across multiple systems and services, and we need someone who can help us experiment, iterate, and discover how to best add value to the business and our products through data. You'll be exploring what's possible, building the first versions of pipelines and tooling, and shaping the direction of data engineering at Fonoa. This is a highly collaborative, hands-on role for someone who thrives in ambiguity, brings curiosity and proactivity, and is energised by the challenge of building something from scratch rather than maintaining something that already exists. What Will You Do Data Platform Foundations * Design, build, and iterate on the foundational data infrastructure that will become Fonoa's internal data platform * Evaluate and select appropriate tools and technologies based on our needs, scale, and team capabilities * Establish patterns and best practices for data modelling, cataloguing, and documentation, and data governance and quality standards early on Data Integration & Access * Connect and consolidate data from multiple internal systems and services into a unified, queryable layer * Build interfaces and tooling that enable non-technical users (including Product, Finance, Operations) to consume data independently * Ensure data quality, consistency, and reliability across sources through validation and monitoring Exploration & Value Discovery * Partner with stakeholders across the business to understand their data needs and identify high-impact opportunities * Prototype dashboards, reports, and data products to test hypotheses about where data can drive decisions * Help define what "data-driven" looks like at Fonoa and shape the roadmap accordingly Collaboration & Enablement * Work closely with the Infrastructure team on cloud resources, networking, and security considerations for data workloads * Partner with Finance, Operations, and Product to understand their reporting and analytical needs, and translate those into reliable, queryable data products * Share knowledge and advocate for data engineering best practices across the organisation What We Are Looking For * 5+ years of experience in a Data Engineering or similar role (Analytics Engineering, Backend Engineering with heavy data work) * Solid proficiency in SQL and at least one programming language (Python, Scala, or similar) * Experience building and maintaining ETL/ELT pipelines and working with data warehousing or lakehouse architectures * Hands-on experience with modern data stack tooling — particularly a columnar warehouse (BigQuery, Snowflake, or similar), a transformation layer (dbt or equivalent), and an ingestion/CDC tool (Airbyte, Fivetran, or similar) * Familiarity with cloud platforms (GCP preferred) and their data services * Experience with workflow orchestration tools * Strong communication skills and the ability to work with non-technical stakeholders and translate their needs into data solutions * Comfort with ambiguity and an ability to make pragmatic decisions with incomplete information * Prior experience bootstrapping a data platform or data function from scratch Bonus Points If You Have * Experience with data visualisation and BI tools (Metabase, Looker, Superset, or similar) * Background working in a product-oriented SaaS company * Experience working with financial or operational data (revenue, billing, reconciliation) * Exposure to infrastructure-as-code and DevOps practices What Success Looks Like * A first iteration of an internal data platform is running, consolidating data from key systems into a reliable, queryable layer * Non-technical stakeholders can access and explore data relevant to their work without needing engineering support for every question * Clear patterns and documentation exist for how data is ingested, transformed, and consumed * You have identified and delivered at least one high-impact data use case that demonstrably adds value to the business or product API DOCUMENTATION For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: https://docs.fonoa.com/ TECH STACK We use these technologies today, but we don’t hire for specific tools. We care about engineers who can understand problems, make good technical decisions, and choose the right tools for the job. * Backend: Node.js, Go * Frontend: React, TypeScript * Infrastructure: GCP, k8s, Terraform, Postgres Note: If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building a diverse and inclusive team. As part of the recruitment process at Fonoa, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.