Senior BackEnd Developer – Payments

B2Tech

. Design, build, and maintain backend services and shared libraries used across gateway and integration teams .

Posted 9/23/2026full-timeCyprusSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in backend engineering with a focus on C# and ASP.NET, developing scalable microservices and REST/gRPC APIs. Proficient in designing resilient distributed systems and enhancing service observability using modern tools and practices.

Highest-signal resume keywords

C#ASP.NETMicroservices DevelopmentPostgreSQL / EF CoreKafka

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Hard Skills

Backend EngineeringDistributed Systems DesignREST/gRPC APIsIdempotent Message ProcessingEvent Sourcing

Soft Skills

OwnershipCollaborationMentoring

Tools & Technologies

OpenTelemetryPrometheusGrafanaDockerKubernetes

Industry Keywords

PaymentsFintechHigh-Reliability Transactional Environments

Tech Stack

Tools & technologies

ASP.NETAWSCloudDistributed SystemsDockerGrafanaGRPCKafkaKubernetesMicroservicesPostgresPrometheusRedisTerraform.NET

About the role

Key responsibilities & impact

Design, build, and maintain backend services and shared libraries used across gateway and integration teams
Develop scalable, cloud-native microservices, REST/gRPC APIs, and integrations using C# and .NET 9
Work across the data and messaging stack, including PostgreSQL / EF Core, Redis / Valkey, and Kafka
Design resilient message-driven workflows using Transactional Outbox/Inbox, idempotent processing, sagas/process managers, retries, eventual consistency, and event sourcing where appropriate
Create reusable engineering standards and building blocks for configuration, observability, logging, and testing
Improve the reliability, performance, testability, observability, and maintainability of payment-critical services
Strengthen service observability with OpenTelemetry, Prometheus/Thanos, Loki, Grafana, and Coralogix, including RED metrics, tracing, and health probes
Partner with product and integration teams to turn business and technical requirements into effective, well-abstracted solutions
Mentor engineers and drive adoption of modern engineering practices, including AI-assisted development

Requirements

What you’ll need

Strong backend engineering experience with C# and ASP.NET
Experience designing and building distributed systems, microservices, REST/gRPC APIs, and shared components
Strong understanding of distributed-system and microservice patterns, including Transactional Outbox/Inbox, idempotent message processing, sagas, distributed transactions, retries, and eventual consistency
Hands-on experience with relational databases such as PostgreSQL / EF Core and caching or key-value stores such as Redis
Experience with Kafka or equivalent message brokers and event-driven architecture
Experience using AI coding agents or AI-assisted development tools
Strong understanding of engineering best practices across integration testing, CI/CD, code quality, observability, and reliability
Ability to take ownership, lead technical initiatives, and collaborate effectively across engineering teams
Nice to have: Experience in payments, fintech, or other high-reliability transactional environments
Nice to have: Practical knowledge of Docker and Kubernetes
Nice to have: Exposure to GitOps / ArgoCD and infrastructure-as-code with Terraform
Nice to have: Experience running services on AWS, particularly EKS, RDS, MSK, ElastiCache, SSM, or Secrets Manager
Nice to have: Familiarity with .NET Aspire and OpenTelemetry-based observability

Benefits

Comp & perks

Annual Discretionary Performance Bonus
Annual Salary Review
21 Days of Paid Leave
Hybrid Working Model
Semi-Flexible Working Hours
Provident Fund
Medical Insurance Coverage
Subsidized Sports Benefits App Subscription
€100 Monthly Lunch Allowance, Plus €9 per In-Office Day
Friday Breakfasts
Biweekly Lunches
Biweekly Happy Hours
Monthly Welfare Events
Exciting Career Paths
Personalized Learning and Development Programs
Birthday Leave
Marriage Leave
Service Awards Gifts
A Variety of Employee Perks