Senior Backend Developer, Integrations

Join nesto — proudly named Canadian Rocketship 2025*. A Deloitte Fast 50 company evolving alongside Canada’s top tech innovators and disrupting a 2.1 Trillion-dollar mortgage industry at light speed by building the mortgage ecosystem of the future.

BUILD lending technology with the best developers, AI engineers, and mortgage experts in the country. Work on a modern tech stack and a development framework designed to unlock your full potential and accelerate your career.

Why join us

• Hypergrowth: Deloitte Fast 50 — 3 years in a row
• Tech community credibility: TechTO Canadian Rocketship 2025*
• Industry leadership: CLA Lending Company of the Year — 4 consecutive years
• Talent magnet: CMP Top Mortgage Employer 2025
• Trusted technology: powering major financial institutions across Canada
• An entrepreneurial culture built on trust, speed, uncomfortable ambition, being stronger together, and a relentless obsession with our clients.

About this role

As a Senior Backend Developer, Integration, you will play a dual role as a strong backend engineer and a confident, customer-facing technical partner. In this role, you’ll have significant customer exposure, where strong communication, credibility with technical audiences, and comfort operating under pressure are just as important as solid engineering fundamentals.

You’ll work within nesto’s Delivery organization on complex integrations with banks and other partners, collaborating closely with Solution Architects and Business Analysts/Consultants throughout the full project lifecycle, which spans the planning, design, implementation, and production support of our Canada's most advanced cloud-based mortgage technology (SaaS).

Early in projects, you’ll spend more time in customer meetings, leading and participating in technical sessions with architects, backend developers, and sometimes business stakeholders to design and align on integration approaches. As the work progresses, your focus will shift toward hands-on backend development to implement and maintain these integrations. In go-live and integration phases, you’ll again be on the front line with customers, supporting testing, debugging, and turning integrations on in production. 

Who are you

We are looking for a hands-on technologist with a strong background in backend development, a passion for solving complex puzzles, and excellent communication skills essential for helping customers' integrations succeed.

About nesto and Nesto Cloud

nesto is Canada’s leading provider of mortgage technology and financing solutions, managing $73B+ CAD in residential and commercial mortgages, with 1,000+ team members across 12 offices nationwide. You will be working on Nesto Cloud, Canada’s most advanced cloud platform, delivering end-to-end technology solutions for lenders in the digital age.

Why we are hiring

We deliver on our mission by empowering our partners to improve and streamline their mortgage lending operations with the nesto Mortgage Cloud. As Canada's most advanced cloud-based mortgage technology, our SaaS solution offers a best-in-class omnichannel experience. This platform consistently drives volume, boosts productivity, and lowers technology costs. To drive the execution of our upcoming projects, we are hiring Senior Backend Developers.

Work location and time zone

We welcome candidates from all Canadian provinces, provided they are willing to adjust their schedule to adhere to the core 9:00 AM – 5:00 PM EST workday. This strict adherence is necessary to ensure consistent availability for critical customer meetings, which occur frequently. This is a fully remote opportunity, offering the flexibility to work from home or from any of our offices (Montreal, Quebec City, Calgary, Toronto, Vancouver, and others).

What success in this role looks like

• You consistently deliver high-quality, efficient, and well-tested code, maintaining the high standards of a strong coder with minimal bugs or rework needed after peer review.
• You proactively keep internal stakeholders fully informed on project progress, escalate potential issues strategically, and provide clear, actionable debriefs to the team following customer calls.
• You handle customer interactions confidently under pressure, leading technical discussions with authority and using precise language to protect the company's interests while fostering strong client trust.

What you’ll be doing

• Participate in and sometimes lead technical integration sessions with our customer development teams, providing expert advice and hands-on support regarding how to integrate with our platform throughout the integration lifecycle.
• Develop detailed technical specifications for integrations between our platform and our B2B customers' backend systems (including API and event mappings, data flows, etc).
• Design, implement/code, test, and deploy custom integrations, connectors, or extensions when customer requirements go beyond standard product capabilities.
• Facilitate technical integration and troubleshooting sessions with customers' engineering teams to ensure successful connectivity between our platform and theirs, following the deployment of the customer-specific integration connector.
• Serve as the primary technical subject matter expert for the components owned by you and the Integrations Development Team, supporting pre-sales consultations, implementation, and post-launch activities.
• Build and maintain a library of compelling documentation, demos, prototypes, or Proof of Concepts (PoCs) to showcase our platform integration capabilities to accelerate the sales cycle.

Who we are looking for

• 5-7 years of experience in a technical, client-facing role such as Backend Developer, Integration Consultant, or Professional Services Engineer.
• Strong hands-on experience with REST/SOAP APIs, webhooks, and event-driven architecture.
• Proficiency in at least one programming language (e.g., Go, Python, Java, TypeScript, C#) for developing custom solutions.
• Strong working knowledge of databases (relational, non-relational, and NoSQL).
• Strong experience in technical, customer-facing roles.
• A proven ability to create clear technical documentation and specifications for other developers.
• Excellent communication and presentation skills, with the ability to explain complex technical concepts to both technical and non-technical stakeholders, including our B2B financial customers.
• A natural problem-solver who is comfortable navigating ambiguity and finding creative solutions to technical challenges.

Preferred but not a must

• Deep proficiency in Golang for building scalable, concurrent services and asynchronous messaging systems (e.g., Kafka, Google Pub/Sub).
• Proven experience using Temporal to architect durable, fault-tolerant workflows.
• Experience in the financial services, FinTech, or mortgage technology industry is a significant advantage.
• Experience with containerization (Kubernetes, k8s, Docker) and Cloud providers (GCP, Azure, or AWS).

You shouldn't apply if

• You prefer roles focused purely on hands-on coding and implementation, with minimal involvement in project design or stakeholder alignment.
• You are not interested in a role that involves frequent client-facing work or extensive communication with numerous internal and external stakeholders.
• You are uncomfortable leading or actively participating in live technical sessions with customers (e.g., architects, backend developers, business stakeholders).
• You prefer working with legacy or simple systems over modern, complex integrations.
• You are unwilling to learn and work with Golang (Go).
• You have no passion for the fintech or mortgage technology space and are unwilling to develop domain expertise in this area.
• You struggle with clear verbal and written communication, particularly in high-pressure or multi-stakeholder settings.

Interview Process

• Recruiter Screen – 30 minutes
• Take-Home Assignment (Backend Code Challenge)
• Technical Interview with Two Backend Developers (Code Challenge Discussion and Q&A)
• Final Non-Technical Interview with two additional stakeholders – 60 minutes
• Criminal Record and Reference Checks + Offer

The Reward

The A-Team: Work alongside high-performing talent in the industry.

Accelerated Growth: The slope of your learning curve here will be vertical. You will touch more production systems in one year than you would in five years at a bank.

Top-Tier Coverage: Premium benefits plan fully paid by nesto, including comprehensive insurance and unlimited access to telemedicine and mental health services for you and your family.

Rest & Recharge: 4 weeks of vacation to ensure you stay at peak performance.

Best-in-Class Tools: Access to the resources and tech you need to execute without friction.

Working framework: the environment that makes you productive and enables teamwork.

Diversity and Inclusion

At nesto, we believe that creativity and collaboration are the result of a diverse team. We are committed to fostering a culture of diversity, equity, inclusion, and belonging, and we strongly encourage women, people of color, LGBTQIA+ individuals, and individuals with disabilities to apply. We are committed to creating a workplace that is inclusive and welcoming to all.

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