Backend Engineer (Billing)

Posted 2 Days Ago
27 Locations
Remote
Junior
Payments • Financial Services
The Role
Build Solidgate’s Billing 2.0 infrastructure, including Products and Prices domain models, public APIs, enterprise pricing engines, resilient service architecture, and automated payment retry systems. Develop high-load backend services in Go, supported by unit, integration, functional, and end-to-end testing. Work with PostgreSQL, queues or streams, and contribute to reliable, scalable fintech billing systems.
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.

We’re building the #1 payment orchestrator in the world — and the names behind us prove it. Clients include Bolt, Ajax, Nova Post, MEGOGO. Trusted by giants like J.P. Morgan. Ranked #2 in the “Employer of the Year 2026” award by Forbes Ukraine.

About the Team and Role

You'll join the Billing team and become part of the effort behind one of the product's core modules — the one responsible for the invoicing cycle, payment retries, subscription management, and monetization. The team is actively building Billing v2 — a global overhaul and expansion of the subscription infrastructure — and has recently grown into a full-fledged Billing Stream.

There's no legacy here — the team is building and launching the new Billing 2.0 module practically from scratch.

Your team — 1 PM, 2 Senior Engineers, 1 Automation QA, 1 Domain Analyst.

What you'll own
  • Core Domain & Public APIs. Design and ship the foundational Products & Prices domain model and public APIs from scratch.

  • Complex B2B Pricing at Scale. Build high-precision volume and graduated pricing engines for multi-tier enterprise billing.

  • Bulletproof Platform Uptime. Decouple critical services from the Products API to eliminate single points of failure.

  • End-to-End Revenue Recovery. Lead the automated retry engine across all invoices, recovering millions in failed payments.

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.

We code in Go, and we're looking equally for experienced Go engineers and strong switchers from Java, Kotlin, Python, or PHP.

 
You're a great fit if you have
  • 2+ years of backend engineering experience (Go/PHP/Kotlin/Java/Python/Node.js)

  • Experience covering code with tests: unit, integration, functional, e2e

  • Strong understanding of high-load system design principles

  • Experience with PostgreSQL and queues or streams

  • A proactive, communicative, independent, and result-oriented mindset

Nice to have
  • Experience with payment systems or in fintech / financial services

  • Kafka

  • AWS services

  • CI/CD pipelines

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. Recommend someone for our role, and if they get hired, there’s a bonus waiting for you — simple as that.

 

Skills Required

  • 2+ years of backend engineering experience with Go, PHP, Kotlin, Java, Python, or Node.js
  • Experience writing unit, integration, functional, and end-to-end tests
  • Strong understanding of high-load system design principles
  • Experience with PostgreSQL and queues or streams
  • Proactive, communicative, independent, and result-oriented mindset
  • Experience with payment systems or fintech or financial services
  • Experience with Kafka
  • Experience with AWS services
  • Experience with CI/CD pipelines
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The Company
HQ: 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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