Sr Software Engineer | Platform Services & Integrations

As a member of this engineering team, you will help customers get access to the right capabilities at the right time: trials, subscriptions, entitlements, and AI-powered features. We work closely with the business to roll out new products and plans, and we build the services and experiences that provision access, track usage, and keep everything consistent across billing, Salesforce, and our core platform.

You’ll join a pragmatic, collaborative team that values learning, pairing, and using AI tools effectively in the development workflow. We own several services and UIs across different codebases, which gives engineers the opportunity to grow by working with multiple systems, patterns, and technologies. Depending on your strengths and interests, you may focus more on modern web UI or on backend/platform services, while still contributing across the stack.

Job Duties & Responsibilities

You will report to an Engineering Manager and work with a group of talented engineers in Bulgaria and the US, focusing on both backend services and frontend experiences that support trials, subscriptions, entitlements, and AI usage.

In this role, you will:

• Collaborate with product, design, and business stakeholders to deliver features that:
• Provision, update, suspend, and cancel access to products and AI features
• Surface subscription and usage information to customers and internal teams
• Support onboarding of newly acquired products into our entitlements model
• Design, implement, and maintain services and APIs that:
• Track and expose AI usage (for example, tokens purchased vs. consumed)
• Integrate with billing systems, Salesforce, and other internal platforms
• Provide reliable, well-documented contracts for other teams to build on
• Use AI tools (e.g., Copilot-style assistants, Claude) as part of your daily work for scaffolding, refactoring, tests, PR review, and documentation—while critically reviewing and improving AI-generated code.
• Write automated tests and participate in code reviews to maintain secure, reliable, and performant services.
• Pair with other engineers to learn the systems, gradually take ownership of features, and contribute to planning, grooming, and design discussions.
• Communicate proactively in a distributed, multi-time-zone team using Slack, video calls, and written design docs.
• At the more senior end of the band, help drive technical decisions, coach less-experienced engineers, and influence team practices and architecture.

Depending on your focus, you may:

• UI-leaning: Build and refine React (or similar) front-end flows for trials, purchases, and account management, creating clear and low-friction customer journeys.
• Backend-leaning: Build and evolve C#/.NET services and data access layers, working with SQL/Snowflake-backed data to support reporting and real-time usage views.

Required Qualifications

Experience:

• Several years of professional software engineering experience, including shipping features to production at scale.
• Experience working on product or platform teams, delivering features end-to-end (requirements, design, implementation, testing, and rollout).

Backend / Platform:

• Experience with C#/.NET or another strongly typed backend language, and willingness to ramp quickly on .NET if it’s new to you.
• Experience building RESTful services and integrating with other internal or external APIs.
• Solid understanding of SQL and working with relational databases; experience with analytics warehouses (e.g., Snowflake) is a plus.

• Familiarity with automated testing frameworks and a habit of writing tests and achieving high levels of code coverage.
• Understanding of object-oriented programming concepts and patterns in languages such as TypeScript, C#, Java, or similar.
• Comfortable using APIs to retrieve, transform, and present data on the web.
• Proficiency in English, both verbal and written.
• A collaborative mindset: you enjoy working with other developers to solve problems, ask questions, and share knowledge.

Preferred Qualifications

Frontend / UI:

• Experience with modern JavaScript and a framework such as React (or similar), including building and shipping production web applications.
• Strong skills with core web technologies (HTML, CSS) and building data-driven, interactive UIs.
• Experience with subscription, licensing, or entitlement systems, or with billing/CRM integrations (e.g., Salesforce, Billing Platform, Stripe).
• Experience with cloud platforms (such as AWS) and related tooling.
• Familiarity with modern JavaScript tooling (for example, Webpack, Babel, npm, Yarn) and CI/CD pipelines.
• Experience with C#/.NET in production systems, or with other compiled languages such as C++ or Java.
• Prior experience using AI coding assistants (e.g., GitHub Copilot) as part of your development workflow.

For candidates at the Senior level:

• Demonstrated ability to lead technical design for a feature or platform area used by multiple teams.
• Experience mentoring other engineers, giving constructive feedback, and improving team processes.

What we offer in exchange for your commitment and good work

• Unlimited remote work policy as well as a Sofia-based office for in-person work as needed
• 25 days of annual leave, plus 2 additional days off for volunteering.
• Competitive remuneration package, including an annual bonus.
• Top-notch IT setup.
• Comprehensive additional benefits such as mental health support, life insurance, and food vouchers.
• Additional health insurance – for you and your loved ones.
• Annual wellness support allowance.
• Support for your growth and development through:
• A variety of internal clubs and initiatives.
• External professional learning opportunities.