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Fonoa

Software Engineer - SAP Connectors

London
Posted 3 months ago
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Job Description

Engineering plays a central part in the business.

As a company with ambitions to be a world-class API solution for all things tax, we value quality over quantity in our development and care about creating scalable, maintainable software that our customers and daily users can rely on.

This role is focused on building and operating integrations with enterprise systems.

Some pointers about our engineering culture:

Engineers are given customer problems to solve rather than features to build. We understand the customer's needs before considering implementation details. Engineers are owners of their past, present and future; architecture, tools, coding, testing, deployment, operations and scaling We work in lean, small teams. We co-own the product roadmap with product managers We choose collaboration, compassion and trust over individualism and politics We prefer innovation, constant iteration and trust over competition and perfect solutions. We support each other, are kind by nature, and give as much feedback to improve as professionals. We break down complex problems and consistently seek to find the most straightforward solutions. We take quality seriously and factor it into everything we do. We are comfortable with change, whether in priorities, goals, or deadlines. We see this more as an opportunity than a hurdle. We are not satisfied with the status quo and push for change. We seek those looking to make a severe impact and are excited about working in a high-growth startup. We ship fast, continuously, and iteratively, learning each step. We are data-informed. And are ok with finding the data when it’s missing.

Our products

We have a suite of API products that automate tax-related workflows for any internet company. Those products are Lookup, Tax, Returns, Data sharing and E-Invoicing.

We may discover novel customer needs as we learn and spin up new products as required.

Our API docs

For you as an engineer, API documentation is probably an important part when considering a new career move. Thanks to the API docs, you can recognise how API works and how it is structured.

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

Start with a chat, not a search bar

Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.

P

Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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It searches the market for you

Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.

Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Strong

Only hits

No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.

Please, visit our API documentation and learn more about our API endpoints and how to use them - https://docs.fonoa.com/.

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Our Tech Stack

Fonoa has a suite of API products that automate tax-related workflows for any internet company. Check them out below:

For backend, we use Node and Go For the frontend, we use ReactJS and Typescript For persistence, we use PostgreSQL We use Azure and GCP for our cloud services We manage our infrastructure with Terraform, Kubernetes CRDs, ArgoCD and DataDog.

“As an engineer, I follow a product through its lifecycle, from ideation to delivery and support, which gives a lot of exposure to the technology and customer needs. This allows me to learn to improve both myself and the product constantly.” - Philip Beel, Engineering Manager.

What You Will Do

Learn about how painful it is for companies to handle tax manually, and think about how our products are changing the status quo Design, build, and operate scalable connectors between Fonoa and enterprise systems such as ERPs and billing platforms. Own what you build, with the ability to decide how to make it and the responsibility of operating it in the production environment. Work deeply with enterprise APIs and data models, building integrations that fit seamlessly into business processes such as Order-to-Cash and Procure-to-Pay. Build high-throughput, fault-tolerant integration services that handle retries, idempotency, data consistency, and versioning across systems. Collaborate closely with the product team to deeply understand Fonoa’s products, provide feedback from real-world integrations, and proactively suggest improvements where needed. Work with customer teams to understand their ERP processes and constraints, ensuring Fonoa’s solutions fit seamlessly into existing workflows. Record and collate lots and lots of data sets from all these operations for long-term storage and future insight Use every learning and observation to improve our products, constantly Understand customer needs and the pain points they experience with tax automation, particularly how tax fits into existing enterprise workflows. Understand competitive products

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You would be a great fit if

You are fully proficient in English. Written and spoken, we are from around the world, but we work in English. You have a strong sense of ownership, care about what you build, and do the right thing that serves your customers. You’re a builder at heart; you like the opportunity of having tons of exposure, making things work for a company long term, and having an entrepreneurial attitude toward anything that comes your way. You have experience building or operating integrations with enterprise systems, such as ERPs, billing platforms, or large financial systems. You understand how enterprise business processes like Order-to-Cash and Procure-to-Pay work, and how systems integrate within those flows. You have hands-on experience with a single ERP or enterprise system and are motivated to apply those patterns while learning others. You are comfortable working with complex external APIs and data models, and designing for reliability, scalability, and correctness. You ship fast, continuously, and iteratively, learning each step. You like to use data over opinions to make decisions. And are ok with finding the data yourself when it’s missing. You are comfortable with change, either in priorities, goals and deadlines. You see this more as an opportunity than a hurdle. You are also satisfied with challenging the status quo and pushing for change. You want to make a severe impact and are excited about working in a high-growth startup. 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.

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Skills

Software Engineering
API Development
Integration
Enterprise Systems
Data Consistency
Node.js
Go
ReactJS
TypeScript
PostgreSQL
Cloud Services
Terraform
Kubernetes
ArgoCD
DataDog

Location

London, England, United Kingdom

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