Senior .NET Backend Engineer (Fintech) - Microservices & Cloud Solutions

Jobgether • Portugal

Remote

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AI Summary

Lead the development of scalable, secure fintech backend services for payment processing, reconciliation, and settlements. Design resilient microservices, integrations, and AI-assisted workflows while ensuring high performance, reliability, and maintainability in a fully remote, international team.

Key Highlights

Build and maintain critical fintech systems for payment processing, payouts, settlements, and fee calculations

Develop scalable microservices and robust integrations using modern cloud infrastructure (Azure, AKS) and databases (SQL Server, Cosmos DB)

Leverage AI-powered tools for development while ensuring code correctness, security, and test coverage

Key Responsibilities

Develop and maintain backend services for payment processing, reconciliation, payouts, settlements, and fee calculations

Design and implement resilient integrations and asynchronous workflows using patterns like idempotency, sagas, and outbox/inbox

Build and optimize microservices to meet performance (p95/p99 latency) and reliability (SLA/SLO) targets

Implement monitoring, alerting, and operational practices to ensure service availability and rapid issue resolution

Use AI-powered development tools to accelerate delivery while validating and reviewing AI-generated code for correctness, security, and test coverage

Write clean, maintainable code and develop automated tests to ensure software quality and long-term maintainability

Participate in code reviews, maintain technical documentation, and share knowledge with the engineering team

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Technical Skills Required

.NET (C# and ASP.NET Core) Microsoft Azure (including AKS and cloud-native services) Microservices Architecture

Benefits & Perks

Fully remote, flexible work arrangement with global location flexibility

27 paid vacation days per year from day one

Wellbeing Wallet (up to €2,800/year for medical, therapy, fitness, and emotional wellbeing expenses)

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Nice to Have

Background in payment processing, fintech, or banking systems

Experience with specification-driven development practices

Previous experience mentoring developers or providing technical leadership

Job Description

We are looking for a senior backend engineer to build and maintain reliable financial technology services supporting payment processing and business operations. In this role, you will develop scalable microservices and robust integrations for complex workflows such as reconciliation, payouts, settlements, and fee calculations. You will work with modern cloud infrastructure and database technologies to deliver secure, high-performance solutions. You will also leverage AI-powered development tools and agents to accelerate delivery while ensuring every implementation meets high engineering standards. Working within an international, fully remote team, you will contribute to technical decisions, maintain clear documentation, and share knowledge with fellow engineers. This is an opportunity to take ownership of critical fintech systems in a dynamic, product-driven environment.

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