Senior Golang Engineer (Taxes)

Posted 5 Days Ago
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Warsaw, Warszawa, Mazowieckie, POL
In-Office
Senior level
Payments • Financial Services
The Role
As a Senior Golang Engineer, you will build the Taxes module for the billing system, focusing on tax calculations and integrations, while fostering team growth and resilience in the system architecture.
Summary Generated by Built In
Our Mission and Vision

At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we’re on a bold path: to become the #1 payments orchestration platform in the world.
We believe the future of payments is shaped by people who think big, take ownership, and bring curiosity and drive to everything they do. That’s exactly the kind of teammates we want on board.

Solidgate is part of
Endeavor — a global community of the world’s most impactful entrepreneurs. We’re proud to be the first payment orchestrator from Europe to join — and to share our expertise within a network of outstanding global companies.


About the Team and Role

You’ll join the Billing team and take ownership of the Taxes module — a core part of our billing system responsible for tax calculation and reporting across multiple locations.

The product has already moved beyond MVP and is actively used by customers. The foundational logic is in place, demand is high, and the next step is scaling functionality and reliability.

This role is exciting because you’re not maintaining legacy code — you’re building and shaping a critical system almost from scratch.
You will have a clear path to Lead: full ownership of the Taxes direction, architectural decisions, and growing a team around it.

Your team — Product Owner, 1 Senior Engineer, 1 Junior Engineer, Automation QA, and Tax Manager.

Explore our technology stack ➡️ here.


What you’ll own

Your focus will be on:

  • building tax calculation and reporting logic

  • integrating third-party tax providers

  • improving system resilience and uptime

  • making architectural decisions and setting technical direction

  • mentoring engineers as the team grows

In the first months, you’ll deliver key tax functionality and lay a solid foundation for future product and team growth.

We rely on automated testing over manual QA — unit, integration, functional, and e2e tests are a core part of how we ship and scale safely.

You’re a great fit if you have
  • 4+ years of backend engineering experience

  • 1.5+ years of commercial Go development

  • Strong understanding of high-load system design

  • Solid experience with PostgreSQL

  • Experience with queues or streams

  • Strong testing culture: unit, integration, functional, e2e

  • Proactive, independent, result-oriented mindset

Nice to have
  • Kafka

  • AWS services

  • CI/CD pipelines

  • Fintech / payments / financial domain experience

  • Understanding of VAT, GST, Sales Tax

  • Experience managing teams

Why Solidgate?

High-impact role. You’re not inheriting a perfect system — you’re building one.

Great product. We’ve built a fintech powerhouse that scales fast. Solidgate isn’t just an orchestration player — it’s the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we’ve got it covered. We hold financial licenses in key regions and are a direct Visa & Mastercard partner and sub-reseller (top 5 globally).

Massive growth opportunity. Solidgate is scaling rapidly — this role will be a career-defining move.

Top-tier tech team. Work alongside our driving force — a proven, results-driven engineering team that delivers.

Modern engineering culture. TBDs, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.

💌 The Extras: 30+ days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits — all designed for ideas, focus, and fun.

Tomorrow’s fintech needs your mindset. Come build it with us.

🫂 Know top talent? We’re always on the lookout. Refer someone for our role, and if they get hired, there’s a bonus waiting for you — simple as that.

Skills Required

  • 4+ years of backend engineering experience
  • 1.5+ years of commercial Go development
  • Strong understanding of high-load system design
  • Solid experience with PostgreSQL
  • Experience with queues or streams
  • Strong testing culture: unit, integration, functional, e2e
Am I A Good Fit?
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The Company
Nicosia
170 Employees
Year Founded: 2016

What We Do

At Solidgate we make international online payments simple with no hidden fees. We provide internet businesses with client-oriented payment gateway services, which are tailored to their business needs. We offer a possibility to accept credit and debit card payments from buyers anywhere in the world. We will help you establish a secure environment with our advanced AntiFraud system, which is specifically designed to help businesses detect and prevent fraud. We offer everything you need to enable secure payment processing and optimal checkout experience. Simple and flexible integration allows you to integrate once and benefit from a continuously improving, cutting-edge platform to meet your business needs however they might change. Our robust API enables businesses to avoid complex integrations and offers a complete payments portfolio under one infrastructure. Our reporting and analytics tool will help your manage payments, analyze your customer and transaction data and in turn make the right decisions for your business.

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