# Lead Backend Engineer (Taxes Module) [Solidgate](https://gurify.com/jobs?q=Solidgate) · Warsaw · Posted 3 months ago Lead [Backend](https://gurify.com/jobs/backend) [Apply on the original posting → (opens in a new tab)](https://jobs.ashbyhq.com/solidgate/9a20308f-feee-422e-b859-472271463512) ## Job description ### 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 https://endeavor.org/ — 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 https://solidgate.com/tax/ — 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. As Lead, you'll take full ownership of the Taxes direction, drive end-to-end architectural decisions, and build and grow the team around it. Your team — Product Owner, 1 Senior Engineer, 1 Junior Engineer, Automation QA, and Tax Manager. Explore our technology stack ➡️ here https://solidgate-tech.github.io/. ### WHAT YOU’LL OWN As a Lead Developer, you'll set the technical direction for the team and take end-to-end ownership of how we build and scale our tax platform. Your focus will be on: - defining the architecture and technical strategy for tax calculation and reporting logic - leading the integration of third-party tax providers and owning those technical partnerships - driving system resilience, uptime, and scalability across services - making high-impact architectural decisions and establishing engineering standards and best practices - leading, mentoring, and growing the engineering team, and helping shape hiring as the team scales In your first months, you'll deliver core tax functionality, establish a solid technical foundation, and define the engineering practices that will support 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, and you'll champion this culture across the team. ### YOU’RE A GREAT FIT IF YOU HAVE - 4+ years of backend engineering experience (Go/PHP/Kotlin/Java/Python) - Proven experience designing and owning high-load, distributed systems - Strong, hands-on experience with PostgreSQL - Solid experience with queues or streams - A strong testing culture: unit, integration, functional, e2e - Experience mentoring engineers and setting technical direction - A proactive, independent, result-oriented mindset with strong ownership ### NICE TO HAVE - Kafka - AWS services - CI/CD pipelines - Fintech / payments / financial domain experience - Understanding of VAT, GST, Sales Tax - Experience managing or leading 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 https://jobs.ashbyhq.com/solidgate/form/external-referral-program for our role, and if they get hired, there’s a bonus waiting for you — simple as that. **Live in Solidgate’s hiring system.** Read from the company's own applicant tracking system, not reposted from a job board — so it's a real, open requisition rather than an ad that outlived the role. 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We exist to fuel the builders \u2014 the ones shaping the digital economy \u2014 with the financial infrastructure they deserve. To achieve that, we\u2019re on a bold path: to become the #1 payments orchestration platform in the world.\u003C/p\u003E\u003Cp\u003EWe believe the future of payments is shaped by people who think big, take ownership, and bring curiosity and drive to everything they do. That\u2019s exactly the kind of teammates we want on board.\u003C/p\u003E\u003Cp\u003ESolidgate is part of Endeavor https://endeavor.org/ \u2014 a global community of the world\u2019s most impactful entrepreneurs. We\u2019re proud to be the first payment orchestrator from Europe to join \u2014 and to share our expertise within a network of outstanding global companies.\u003C/p\u003E\u003Ch3\u003EABOUT THE TEAM AND ROLE\u003C/h3\u003E\u003Cp\u003EYou\u2019ll join the Billing team and take ownership of the Taxes module https://solidgate.com/tax/ \u2014 a core part of our billing system responsible for tax calculation and reporting across multiple locations.\u003C/p\u003E\u003Cp\u003EThe 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.\u003C/p\u003E\u003Cp\u003EThis role is exciting because you\u2019re not maintaining legacy code \u2014 you\u2019re building and shaping a critical system almost from scratch.\u003Cbr /\u003EAs Lead, you\u0026#39;ll take full ownership of the Taxes direction, drive end-to-end architectural decisions, and build and grow the team around it.\u003C/p\u003E\u003Cp\u003EYour team \u2014 Product Owner, 1 Senior Engineer, 1 Junior Engineer, Automation QA, and Tax Manager.\u003C/p\u003E\u003Cp\u003EExplore our technology stack \u27A1\uFE0F here https://solidgate-tech.github.io/.\u003C/p\u003E\u003Ch3\u003EWHAT YOU\u2019LL OWN\u003C/h3\u003E\u003Cp\u003EAs a Lead Developer, you\u0026#39;ll set the technical direction for the team and take end-to-end ownership of how we build and scale our tax platform. Your focus will be on:\u003C/p\u003E\u003Cul\u003E\u003Cli\u003Edefining the architecture and technical strategy for tax calculation and reporting logic\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003Eleading the integration of third-party tax providers and owning those technical partnerships\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003Edriving system resilience, uptime, and scalability across services\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003Emaking high-impact architectural decisions and establishing engineering standards and best practices\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003Eleading, mentoring, and growing the engineering team, and helping shape hiring as the team scales\u003C/li\u003E\u003C/ul\u003E\u003Cp\u003EIn your first months, you\u0026#39;ll deliver core tax functionality, establish a solid technical foundation, and define the engineering practices that will support future product and team growth.\u003C/p\u003E\u003Cp\u003EWe rely on automated testing over manual QA \u2014 unit, integration, functional, and e2e tests are a core part of how we ship and scale safely, and you\u0026#39;ll champion this culture across the team.\u003C/p\u003E\u003Ch3\u003EYOU\u2019RE A GREAT FIT IF YOU HAVE\u003C/h3\u003E\u003Cul\u003E\u003Cli\u003E4\u002B years of backend engineering experience (Go/PHP/Kotlin/Java/Python)\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EProven experience designing and owning high-load, distributed systems\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EStrong, hands-on experience with PostgreSQL\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003ESolid experience with queues or streams\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EA strong testing culture: unit, integration, functional, e2e\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EExperience mentoring engineers and setting technical direction\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EA proactive, independent, result-oriented mindset with strong ownership\u003C/li\u003E\u003C/ul\u003E\u003Ch3\u003ENICE TO HAVE\u003C/h3\u003E\u003Cul\u003E\u003Cli\u003EKafka\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EAWS services\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003ECI/CD pipelines\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EFintech / payments / financial domain experience\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EUnderstanding of VAT, GST, Sales Tax\u003C/li\u003E\u003C/ul\u003E\u003Cul\u003E\u003Cli\u003EExperience managing or leading teams\u003C/li\u003E\u003C/ul\u003E\u003Cp\u003EWHY SOLIDGATE?\u003C/p\u003E\u003Cp\u003EHigh-impact role. 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TBDs, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.\u003C/p\u003E\u003Cp\u003E\u0026#128140; The Extras: 30\u002B days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits \u2014 all designed for ideas, focus, and fun.\u003C/p\u003E\u003Cp\u003ETomorrow\u2019s fintech needs your mindset. Come build it with us.\u003C/p\u003E\u003Cp\u003E\u0026#129730; Know top talent? We\u2019re always on the lookout. 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