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Solidgate

Senior Backend Engineer – Taxes Module

Solidgate

. Take ownership of the Taxes module within the Billing team .

Posted 10/8/2026full-timeRemote • PolandSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in backend engineering with a focus on tax calculation and reporting, system resilience, and high-load system design. Proficient in developing automated testing frameworks and mentoring engineering teams to drive product and team growth.

Highest-signal resume keywords
Backend Engineering ExperienceGo, PHP, Kotlin, Java, PythonPostgreSQLUnit, Integration, Functional, E2E TestingTeam Management Experience

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
Tax Calculation LogicHigh-Load System DesignAutomated TestingArchitectural Decision MakingSystem Resilience Improvement
Soft Skills
Proactive MindsetIndependent WorkResult-Oriented
Tools & Technologies
AWS ServicesCI/CD PipelinesKafkaQueuesStreams
Industry Keywords
FintechPaymentsFinancial DomainVATGSTSales Tax

Tech Stack

Tools & technologies
AWSJavaKafkaKotlinPHPPostgresPythonGo

About the role

Key responsibilities & impact
  • Take ownership of the Taxes module within the Billing team
  • Build tax calculation and reporting logic
  • Integrate third-party tax providers
  • Improve system resilience and uptime
  • Make architectural decisions and set technical direction
  • Mentor engineers as the team grows
  • Deliver key tax functionality in the first months
  • Lay a solid foundation for future product and team growth
  • Develop and maintain automated unit, integration, functional, and e2e tests

Requirements

What you’ll need
  • 6+ years of backend engineering experience in Go, PHP, Kotlin, Java, or Python
  • Strong understanding of high-load system design
  • Solid experience with PostgreSQL
  • Experience with queues or streams
  • Strong testing culture: unit, integration, functional, and e2e testing
  • Proactive, independent, result-oriented mindset
  • Kafka experience is a plus
  • AWS services experience is a plus
  • CI/CD pipelines experience is a plus
  • Fintech, payments, or financial domain experience is a plus
  • Understanding of VAT, GST, or Sales Tax is a plus
  • Experience managing teams is a plus

Benefits

Comp & perks
  • 30+ days off
  • Unlimited sick leave
  • Free office meals
  • Health coverage
  • Apple gear
  • Courses
  • Conferences
  • Sports and wellness benefits
  • Referral bonus if a referred candidate is hired