---
title: 'Senior GTM Systems Engineer at Fonoa'
canonical: 'https://feeny.ai/job/senior-gtm-systems-engineer-fonoa-london-fm4st8y6mngy'
type: 'job'
last_seen: '2026-09-14'
---

# Senior GTM Systems Engineer at Fonoa

- **Company:** Fonoa
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-05-29
- **Last confirmed live:** 2026-09-14
- **Apply:** https://jobs.ashbyhq.com/fonoa/1e03ab6b-1123-4c73-a411-07eb4d99c2e6

## Job description

Senior GTM Systems Engineer

Build the Revenue Infrastructure Behind Autonomous Tax

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](http://Booking.com).

Find out more:[www.fonoa.com](http://www.fonoa.com)

## The Role

We're looking for a Senior GTM Systems Engineer to design and scale the systems that power Fonoa's go-to-market engine. This is not a Salesforce Admin role. It's a systems engineering role focused on building scalable, AI-enabled revenue infrastructure. You'll own architecture, integrations, data design, automation, and AI deployment across Sales, Marketing, Customer Success, Partnerships, and Revenue Operations.

## What You'll Do

GTM Systems Architecture

- Design and build the revenue systems architecture that underpins our GTM organisation
- Create scalable, composable systems that separate data, logic, and user workflows
- Eliminate unnecessary tooling, integration debt, and manual processes
- Establish standards for maintainability, observability, and reliability

AI & Automation

- Deploy AI-powered workflows across lead qualification, account research, forecasting, renewals, and revenue operations
- Connect models to live business data and operational systems
- Build event-driven automations and internal tooling that deliver measurable efficiency gains

Data & Integrations

- Own the data model across accounts, contacts, opportunities, and revenue events
- Manage integrations between Salesforce, marketing platforms, data warehouses, enrichment providers, and AI tooling
- Ensure data quality, governance, and operational visibility across the GTM stack

Business Partnership

- Translate GTM strategy into scalable systems and workflows
- Partner with Sales, Marketing, Customer Success, Partnerships, and Finance leaders
- Influence how Fonoa's revenue technology stack evolves as we scale

## What We're Looking For

Required

- 5+ years in GTM Engineering, Revenue Operations, Revenue Systems, or a similar technical role
- Strong Salesforce experience, with expertise extending beyond administration
- Experience designing and managing complex business system integrations
- Proven AI deployment experience, including automations, agents, workflows, or model-driven applications
- Strong data modelling and systems design skills
- Ability to move between strategic planning and hands-on execution

Strong Signals

- Experience building with LLMs and AI APIs
- Experience with tools such as n8n, Clay, Make, Zapier, Workato, or similar platforms
- Strong opinions on data governance and system design
- Experience scaling systems within a high-growth B2B SaaS company

What This Role Is Not

- A Salesforce Administrator role with a different title
- A reporting and dashboard-focused operations role
- A project management position coordinating technical work
- A prompt engineering role without real implementation ownership

Why Join Fonoa? We're building a modern, AI-enabled operating system for tax. Internally, we're applying the same principles: modularity, automation, observability, and intelligence. This is an opportunity to architect the revenue platform behind one of the most ambitious companies in tax technology and help define what world-class GTM engineering looks like at scale.

https://www.fonoa.com/resources/blog/fonoa-raises-funding-and-acquires-indirect-tax-edge As part of the recruitment process at Fonoa, we process your personal data in accordance with our [Privacy Notice for Job Applicants](https://www.fonoa.com/legal/privacy-notice-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.

## About Fonoa

## Company Overview
- **One-liner**: Fonoa provides an AI-driven global tax automation platform that handles determination, e-invoicing, return filing, and tax ID validation for digital businesses.
- **Entity Type**: Private (most recent funding round: $110M in May 2026, total funding $195M)
- **Headquarters**: Dublin, Ireland
- **Founded**: 2019
- **Founders**: Filip Sturman (Co-founder & COO) and other co-founders formerly at Uber (names not publicly disclosed)

## Core Business
- **Primary industry/industries**: Tax compliance automation, financial technology (FinTech)
- **Target customers**: B2B – multinational digital platforms, marketplaces, SaaS businesses, and enterprises. Examples include Uber, Zoom, Booking, and Remote.com.
- **Mission or purpose statement**: “Real-time tax compliance for innovators” – to remove tax complexity so businesses can scale globally.

## Products & Services
- **Tax Engine (API)**: Deterministic tax calculation (VAT, GST, Sales Tax) across 190+ jurisdictions with sub-200ms response time. ([fonoa.com](https://www.fonoa.com/))
- **E-Invoicing**: Compliant e-invoicing with accredited government connections, ultra-low rejection rates. Powers invoicing for 1M+ sellers on leading marketplaces. ([fonoa.com](https://www.fonoa.com/))
- **Tax Return Filing**: Automated multi-country return filing with full lineage from return box to source transaction. ([fonoa.com](https://www.fonoa.com/))
- **Tax ID Validation**: Real-time validation of tax IDs in 120+ countries, with fuzzy name matching. ([fonoa.com](https://www.fonoa.com/))
- **Tax Knowledge AI**: A living global tax intelligence layer that answers complex questions with cited sources. ([fonoa.com](https://www.fonoa.com/))
- **Audit Readiness Tool**: Compresses audit readiness from weeks to minutes by providing instant access to all tax data. ([fonoa.com](https://www.fonoa.com/))

## Market Standing
- **Valuation**: Not publicly disclosed
- **Key Metric**: Total Funding – $195M (including $110M raised May 2026, which also funded the acquisition of PwC’s Global Indirect Tax Compliance platform) ([cbinsights.com](https://www.cbinsights.com/company/fonoa))
- **Notable Investors**: Index Ventures (Seed), OMERS Ventures (Series A), Coatue (Series B). Lead investor in May 2026 round not specified in search results. ([linkedin.com](https://www.linkedin.com/company/fonoa))
- **Growth Signals**:
  - 500M+ transactions processed annually.
  - Customer retention rate 97% (100% of customers who started 2025 renewed).
  - Headcount growth of +51.3% YoY (184 employees, up 79 in the last year).
  - Named to Sifted’s B2B SaaS Rising 100 for four consecutive years (2023–2026). ([fonoa.com](https://www.fonoa.com/company/about))

## Competitive Advantages
- **Single platform for the entire indirect tax lifecycle** – reduces integration complexity vs. stitching together multiple point solutions.
- **AI agents automate compliance workflows** while humans supervise, enabling audit readiness in minutes.
- **Deep government connections** for e-invoicing with near-zero rejection rates.
- **Uber pedigree** – founders built the platform based on firsthand experience scaling a global digital business.
- **Fast integration** – typical go-live in weeks or days, not months.

## Strategic Focus
- **AI-first tax platform**: Launched AI agents to autonomously execute compliance workflows, with human oversight. ([fonoa.com](https://www.fonoa.com/))
- **Post-acquisition integration**: Absorbing PwC’s global indirect tax compliance platform to expand reach and capabilities. ([fonoa.com](https://www.fonoa.com/company/about))
- **Global expansion**: Covers 190+ jurisdictions and continues to add new country support.
- **Product-led growth**: Prioritizing developer experience and API-first design to embed tax intelligence into customer products.

## Why Work Here
- **Culture & Mission**: Described as “the fastest-growing tech company in our space”; teams are encouraged to tackle complex global tax challenges with autonomy and collaboration. ([fonoa.com/company/careers](https://www.fonoa.com/company/careers))
- **Work Model**: Hybrid and remote opportunities available (depending on role); regular office meetups and team offsites. ([fonoa.com/company/careers](https://www.fonoa.com/company/careers))
- **Perks & Benefits**:
  - Competitive salary and equity stake.
  - 25 days paid time off (PTO).
  - Home office allowance for remote setup.
  - Bi-weekly team lunches.
  - Annual all-company trip (“FUNoa”) for learning and bonding.
- **Engineering & Growth**: Strong focus on engineering quality (Senior/Staff roles open in AI, frontend, data). 24% of employees are in technical departments. ([linkedin.com](https://www.linkedin.com/company/fonoa))
- **Diversity**: Operates across 18 countries with distributed teams, offering international exposure.

## Sources
1. [fonoa.com](https://www.fonoa.com/) – Product descriptions, mission, customer logos, company numbers.
2. [fonoa.com/company/about](https://www.fonoa.com/company/about) – Founding story, funding news ($110M raise + PwC acquisition), Sifted recognition.
3. [fonoa.com/company/careers](https://www.fonoa.com/company/careers) – Benefits, culture, hiring process, hybrid/remote policy.
4. [linkedin.com](https://www.linkedin.com/company/fonoa) – Employee count, revenue, funding, headcount growth, founders, exec team.
5. [cbinsights.com](https://www.cbinsights.com/company/fonoa) – Total funding amount ($195M), latest round details.

## Other roles at Fonoa

- [Junior Tax Content Analyst](https://feeny.ai/job/junior-tax-content-analyst-fonoa-zagreb-7rtfetjsncqm) — Zagreb, Croatia
- [Solutions Architect- Indirect Tax](https://feeny.ai/job/solutions-architect-indirect-tax-fonoa-new-york-s548kp6hhz9y) — New York, NY
- [Solutions Consultant, (Indirect Tax)](https://feeny.ai/job/solutions-consultant-indirect-tax-fonoa-new-york-dzfngb7jwbvj) — New York, NY
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-fonoa-zagreb-56ca7b0s69m5) — Zagreb, Croatia
- [Procurement Manager](https://feeny.ai/job/procurement-manager-fonoa-zagreb-npyjcksx0b9x) — Zagreb, Croatia
- [Regional Sales Director](https://feeny.ai/job/regional-sales-director-fonoa-london-g7169nv4bdqy) — London, United Kingdom
- [Sales Development Representative](https://feeny.ai/job/sales-development-representative-fonoa-london-0a25z0w2q70j) — London, United Kingdom
- [Senior User Researcher](https://feeny.ai/job/senior-user-researcher-fonoa-london-47y4pyecpxxn) — London, United Kingdom
- [Staff Product Designer](https://feeny.ai/job/staff-product-designer-fonoa-london-v7skvrgp6vk4) — London, United Kingdom
- [Senior RevOps Manager](https://feeny.ai/job/senior-revops-manager-fonoa-london-pxn5ychsbf0m) — London, United Kingdom