Senior Backend Engineer – Subscription & Account

The Accounts & Subscription teams own billing and authorization services, including text-billing for subscriptions, usage-based pricing, payment-provider integrations, SSO, account management, and the OAuth implementation used to authenticate clients across products.

Current projects include integrating with Google Payments, building a flexible roles-and-permissions system (ACAM), and migrating customers from the legacy platform to TextApp.

About the role

Join as the technical owner of SSO and account services. This role involves translating business requirements into technical solutions, aligning dependent teams, and delivering cross-functional projects in partnership with product managers and engineers.

What you'll do

• Own the SSO service and OAuth implementation; lead technical decisions, propose improvements, and communicate trade-offs to stakeholders.
• Work on text-billing, including subscriptions, usage-based pricing, and payment-provider integrations.
• Drive projects end-to-end: gather business requirements, design solutions, coordinate dependent teams, set milestones, and deliver.
• Proactively maintain services by identifying issues before incidents and proposing fixes before blockers arise.
• Contribute to client migration to TextApp and ACAM role-management improvements.

Who you are

• An owner who identifies problems, proposes fixes, and drives work forward.
• Fluent in authentication at the protocol level, including OAuth flows, token types, and implementation risks.
• A cross-team communicator who can present technical solutions to non-technical stakeholders and coordinate external teams.
• Pragmatic about balancing sound engineering with delivery, with experience maintaining production systems and defending trade-offs.
• Comfortable using AI coding tools such as Cursor, Claude Code, or similar tools.

You're a great fit if you have

• Deep OAuth 2.0 protocol knowledge, including flows, token types, and authorization models. OAuth implementation experience is a strong advantage.
• Strong production Go experience. Candidates with solid backend fundamentals and deep OAuth knowledge in another language must transition to Go.
• Solid MySQL experience.
• Familiarity with GCP and Kubernetes.
• A record of owning backend projects from design through cross-team coordination and delivery.

Nice to have

• Experience with billing, subscriptions, or payment systems.
• Experience with ClickHouse or similar columnar databases.

How we work

• Hybrid work: remote when appropriate and onsite when needed.
• Once per quarter, the team spends five working days together at the Wrocław office for focused execution, unblocking work, and driving key outcomes.
• The office is open year-round.
• B2B (self-employed) contract. A registered business in selected EU countries is required, either already established or possible to register in the candidate's country.

Benefits

• Multisport card, private healthcare, and home-office equipment budget.
• Hybrid work model.
• Unlimited paid days off and sick days.
• An outcomes-focused environment rather than one based on hours worked.
• Opportunity to work with the makers behind LiveChat, ChatBot, HelpDesk, KnowledgeBase, and OpenWidget.