2130 Senior Backend Engineer - Payments Infrastructure
Position: Senior Backend Engineer - Payments Infrastructure Location: Fully Remote (Singapore, Philippines, Thailand Preferred) Contract Type: Full-time, Permanent Time Zone Alignment: Indian Standard Time (IST) 🧭 About Inallmedia.com Inallmedia.com is a global technology and design firm focused on building impactful digital solutions through remote, distributed teams. We partner with international clients across industries, providing long-term technical expertise, product innovation, and team augmentation.
🚀 Project Overview You will be embedded directly into the core Payments Infrastructure and Revenue Engineering team for a global enterprise platform. This team owns high-concurrency, revenue-critical systems that process transactional flows worldwide. Your primary mandate is to accelerate the delivery of near-term payment feature initiatives while systematically clearing a growing backlog of technical debt.
Operating in an Agile sprint cadence alongside full-time core engineers and product managers, you will focus on modernizing infrastructure, migrating legacy components, maintaining high reliability, and delivering well-tested, production-grade payment features. 🔍 Key Responsibilities Feature Implementation & Architecture: Build and maintain scalable backend payment flows (including charges, refunds, dispute resolution, and asynchronous webhooks) using Java (primary), Kotlin, and Python.
API & Microservice Development
Design, implement, and maintain RESTful and GraphQL APIs, microservices architectures, and event-driven systems consumed by multiple downstream services.
Technical Debt & Legacy Modernization
Refactor legacy codebases, execute service migrations, deprecate outdated APIs, and increase test coverage to ensure system resilience and prevent regression issues.
CI/CD & Engineering Best Practices
Write clean, production-ready code with strong unit, integration, and contract test coverage. Manage version control, branch workflows, and automated deployment pipelines via GitLab CI/CD.
Agile Collaboration & Delivery
Participate in sprint-based delivery, sprint planning, peer code reviews, architectural discussions, and Agile/Scrum ceremonies within a distributed cross-functional team.
Observability & Incident Management
Triage and resolve production incidents within high-concurrency payment and billing environments, leveraging logging and monitoring tools.
Technical Documentation
Produce architectural designs, API specifications, Knowledge Transfer (KT) documents, and operational runbooks to ensure smooth hand-offs and maintainability. 💡 Must-Have Skills Experience & Domain: 3+ years of backend software engineering experience building and operating production backend services at scale, with direct exposure to payments, fintech, or billing domains (payment gateways, processors, or PSPs).
Core Languages
Strong proficiency in Java as the primary language, supplemented by working knowledge of Kotlin and Python.
Architecture & Database
Hands-on experience with microservices, event-driven distributed systems (message queues, asynchronous processing, eventual consistency), relational databases (MySQL), and SQL.
API & Testing
Expertise in RESTful and GraphQL APIs, writing unit, integration, and contract tests, and designing internal APIs for downstream clients.
Payment Life Cycle
Proven track record of building end-to-end backend payment flows, refactoring legacy systems, and resolving payment system production incidents.
Tools & Process
Experience with version control and CI/CD via GitLab; task/sprint tracking via Jira; working within Agile/Scrum methodologies.
Execution & Autonomy
Fast ramp-up capability on existing codebases with minimal supervision; strong asynchronous collaboration skills across distributed teams. ✨ Nice-to-Have Skills Enterprise Frameworks: Hands-on experience with Spring Boot, Gradle, and service mesh architectures within a large enterprise engineering organization.
Security & Compliance
Familiarity with PCI-DSS compliance, payment security, or financial data handling.
Observability Tooling
Experience using Datadog for system monitoring and log analytics.
Open Source
Open-source contributions or a portfolio of shipped payment features. 🌐 Time Zone & Collaboration The role is fully remote, targeting candidates located in the APAC / India region (or regions within a 2-hour offset). Availability to cover Indian Standard Time (IST) hours (preferably 10:00 AM – 7:00 PM IST) is strictly required to ensure seamless asynchronous and synchronous collaboration with the distributed cross-functional team. 💬 Language All interviews, documentation, and daily communication will be in English. #LI