Senior Backend Developer, Integrations

Responsibilities

• Lead and participate in technical integration sessions with client development teams to provide expert guidance.
• Develop detailed technical specifications for B2B integrations, including API mapping, event flows, and data mapping.
• Design, code, test, and deploy custom integrations, connectors, or extensions to meet specific client needs.
• Act as a Subject Matter Expert (SME) for integration components, supporting pre-sales, implementation, and post-launch activities.
• Create and maintain a library of technical documentation, prototypes, and proofs of concept (PoC) to accelerate the sales cycle.
• Facilitate troubleshooting sessions with client engineering teams to ensure optimal connectivity.

Requirements

• 5 to 7 years of experience in a technical client-facing role (e.g., Backend Developer, Integration Consultant, or Professional Services Engineer).
• Hands-on experience with REST/SOAP APIs, webhooks, and event-driven architecture.
• Proficiency in at least one programming language such as Go, Python, Java, TypeScript, or C#.
• Strong knowledge of relational and NoSQL databases.
• Proven ability to write clear technical documentation and specifications for other developers.
• Excellent communication skills with the ability to explain complex technical concepts to both technical and non-technical stakeholders.

Preferred Qualifications

• Deep expertise in Golang for building scalable services and asynchronous messaging systems (e.g., Kafka, Google Pub/Sub).
• Experience with Temporal for durable, fault-tolerant workflow architecture.
• Background in FinTech, financial services, or mortgage technology.
• Experience with containerization (Kubernetes, Docker) and cloud providers (GCP, Azure, or AWS).

Benefits

• Work with a dream team of industry-leading talent.
• Accelerated career growth within a high-growth environment.
• Premium benefits including a comprehensive insurance plan paid 100% by the company, including telemedicine and mental health support.
• 4 weeks of vacation time.

About the Company

nesto is a leading provider of mortgage financing and technology solutions in Canada, managing over $73B CAD in residential and commercial mortgages. Through Nesto Cloud, we provide the most advanced cloud platform in the country, offering end-to-end solutions for digital-era lenders.