About Contour
Contour Software has grown from a dozen people to over 2,000 staff across 3 cities, in less than 14 years.
As a subsidiary of Constellation Software Inc., we are proud to be part of a global enterprise software conglomerate that has grown to become one of the top 10 software companies in the world, with employees and customers in 100+ countries. With a broad-based and ever-growing portfolio of market-leading, vertical-market enterprise solutions covering more than 100 industry domains in predominantly mature markets, CSI's recipe creates the perfect environment for professionals to build fulfilling, long-term careers.
What started as an R&D & Accounting back-office, has progressed into a full-service Global Centre serving all functions and departments, at the divisional as well as operating group/corporate level. Today Contour employees, located in Karachi, Lahore & Islamabad, are serving CSI divisions located in time zones spanning the globe, from Sydney to Vancouver. With the global growth of Constellation as the wind in our sails, we are only just getting started!
About Perseus Payments Inc.
Perseus Payments Inc., part of Constellation Software, builds PerseusPay. PerseusPay is a cloud-native payments platform for marine, outdoor power equipment and RV dealers in the US and Canada. The platform is PCI DSS compliant, and the team is building toward an AI-native way of developing software.
Why This Role
This is a chance to build features on a live payments platform used by hundreds of dealer locations. You will own work from an incomplete brief through to production, across backend, UI and payment processor integrations. The platform is secure, PCI-compliant and built to scale.
Role Overview
We are hiring a software developer for the team that builds new PerseusPay features, as distinct from our support and platform work. You will own features from an incomplete brief through to production: shaping the design, building the backend APIs and UI, working through payment-processor rules, and shipping behind feature flags. Requirements on a payments product change often, because processor behaviour, compliance rules, DMS partner needs and dealer feedback all move. We want someone who finds that interesting and keeps delivering without waiting to be told what to do next.
Key Responsibilities
Take a feature from PRD or user story to production: clarify the scope, design the solution, build, test, and release behind a feature flag.
Build and maintain REST APIs, background processing and database changes in C# / .NET.
Build and maintain React UI for the dealer portal, the embedded payment page and the checkout plugin.
Integrate with payment processor APIs and webhooks, and read processor documentation to find the edge cases that matter.
Spot gaps, contradictions and missing edge cases in requirements, and bring them to the Product Owner and Director of R&D with a recommended option.
Re-plan quickly when scope changes, and say clearly what that does to the delivery date.
Write unit and integration tests, take part in code reviews, and meet our SonarQube and secure coding standards.
Keep production safe with structured logging, error handling, idempotency, retries and concurrency safety on money-moving flows.
Support QA with test data and fixes, and support release validation.
Keep technical notes, decision records and Azure DevOps items current so work is traceable.
Work with the team’s AI-assisted and agentic development tools, including Claude Code, within our security rules.
Our Tech Stack
Backend: C# on .NET 8 (moving toward .NET 10), ASP.NET Core Web API, Entity Framework Core, Azure Functions.
Frontend: React / JavaScript SPA.
Data: Azure SQL (SQL Server), Redis, Azure Service Bus.
Azure: App Service, API Management, Front Door with WAF, Functions, SignalR, Key Vault, App Configuration, Application Insights.
Security and identity: OAuth2 / JWT, Duende IdentityServer, PCI DSS v4.0.1 controls, SonarQube SAST.
Delivery…