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
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.
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
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
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/
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.
Skills Required
- 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
- 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
Fonoa Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Fonoa and has not been reviewed or approved by Fonoa.
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Equity Value & Accessibility — Equity is included as a core element of pay, framed as a “stake in the company,” signaling meaningful ownership access for employees. This positions total compensation beyond cash alone.
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Leave & Time Off Breadth — Generous paid time off is explicitly offered as part of the package, emphasizing the ability to rest and recharge. This contributes to a more balanced total rewards mix.
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Wellbeing & Lifestyle Benefits — Home‑office allowance, regular team connection activities, and company offsites are highlighted as ongoing lifestyle and community perks. These elements support remote work effectiveness and team cohesion.
Fonoa Insights
What We Do
Fonoa is a global tax automation and compliance solution provider that helps companies streamline the entire transactional chain. We empower digital businesses to easily handle tax compliance with solutions like tax calculations, invoicing, tax ID validations and more – all from one platform. With Fonoa, your company can: - Instantly validate tax ID numbers from 95+ countries - Report transactions in accordance with local tax law, including DAC7 - Apply the correct indirect and withholding tax treatment to each transaction - Issue custom-branded tax invoices in locally compliant languages and formats - Automatically populate tax returns ready for filing - Maintain compliance at scale See why companies like Zoom, Uber, Booking, and Remote.com trust Fonoa to automate and manage their global tax obligations.
Why Work With Us
Fonoa is redefining tax compliance infrastructure for the AI era - API-first, end-to-end, and built from the ground up while competitors patch legacy systems. With customers like Uber, NVIDIA, and Meta, product-market fit is proven. At Series C with 250 people and a growing US team, it's early enough to shape something, late enough to matter.
