Senior/Staff Software Engineer, Fonoa
Artificial Intelligence
More information about location
Tax automation for the internet economy
Open for applications
Tax automation for the internet economy
201-500 employees
Open for applications
More information about location
201-500 employees
Company mission
To eliminate the manual work when dealing with taxes on online transactions.
Role
Who you are
- 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
- 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
- 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
What the job involves
- 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
- 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
- API Documentation:
- For engineers, API design and structure are an important part of evaluating a role
- Tech Stack:
- Backend: Node.js, Go
- Frontend: React, TypeScript
- Infrastructure: GCP, k8s, Terraform, Postgres
Salary benchmarks
Our take
It's never been simpler to set up a business online. Tools like Stripe, Intercom, and Twilio have enabled entrepreneurs to sell to millions of consumers and businesses across borders. But managing tax compliance remains a minefield that gets even more intense as companies grow and scale internationally.
Fonoa removes the challenge of managing indirect taxes from the everyday business of digital-native companies, with a suite of plug-and-play products that make up its global tax compliance platform. Since launching in 2018, the company has expanded its product suite heavily and secured big-name clients such as Booking.com, Spotify, Teachable, Uber and Zoom.
With strong funding under its belt and the 2026 acquisition of global tax compliance company Indirect Tax Edge (Edge), Fonoa has continued to develop towards becoming a fully international player offering services on a global scale. The company is focusing on a full tax stack approach for growth, prioritising technology to suit the digital business models of today. Through this, Fonoa is well-poised to tackle an almost unending market that has catapulted other startups to Unicorn status.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
196% employee growth in 12 months
Company
Funding (last 2 of 4 rounds)
May 2026
$110m
SERIES C
Jul 2022
$60m
SERIES B
Total funding: $195m
Company benefits
- Stake in the company: You'll have equity in Fonoa so when we win, you win.
- 25 days paid time off (PTO):Relax, recharge, and come back ready to conquer the (tax)w world.
- Team offsites: Departments and teams organize their own offsites throughout the year - to collaborate, strategize, and spend time together.
- Lunch on us: Bi-Weekly team lunches: Bond with colleagues in the office or virtually.
- Home office allowance: Want a more comfortable chair? Need a new monitor? Would you like to make your space more inspiring? Create the perfect setup at home.
- FUNoa: Once a year, we bring the entire company together for learning, bonding, and fun in a unique and inspiring location somewhere in the world.
Company HQ
North City, Dublin, Ireland
Leadership
Davor Tremac
(CEO)Prior to Fonoa, Davor was a GM at Uber for Southeastern Europe for 4 years, worked in consulting with McKinsey for a decade, and founded a VC-backed startup, Gourmeo.
Filip Sturman
(Co-Founder & COO)Former CPO of the company. Before Fonoa, was a business operator at Uber, Uber Eats, and Trivago between Croatia, Spain, and Germany.
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