Senior Back End Engineer - Mobile Team

Proof; Toronto; On-site; CAD 120,000 - 160,000; Full time

Benefits offered by this job

Flexible time off

Company-provided equipment

Comprehensive benefits package

Job summary

Proof is seeking a Senior Back End Engineer for their Mobile Team in Toronto, Canada. The role involves leading the design and maintenance of backend services for a high-growth legal tech platform. Candidates should have over 5 years of backend development experience with proficiency in Go and PostgreSQL, designing RESTful APIs, and working with cloud infrastructure. The position offers a full-time remote role with flexible time off, a salary range of $120,000 – $160,000 CAD, and comprehensive benefits including healthcare and equipment.

Qualifications

• 5+ years of backend development experience, building scalable web services and APIs.
• Strong experience in PostgreSQL, including schema design and query optimization.
• Proficient in Go, building production services.

Responsibilities

• Lead the design and maintenance of backend services for high availability.
• Architect database schemas, optimize queries, and build RESTful APIs.
• Collaborate with teams to deliver impactful features.

Skills

Backend development

Go

PostgreSQL

RESTful APIs

Cloud infrastructure

CI/CD practices

Communication

Tools

AWS

GCP

Azure

Job description

We’re Proof, a high growth company in the legal tech industry, launched in 2017. We've built a best‑in‑class legal services platform used by thousands of law firms with a sustained average growth rate of over 10%. Our marketplace platform helps law firms and pro‑se parties access more efficient, transparent, and accessible legal services that are not traditionally available to everyone. Our primary services are Service of Process and E‑Filing. We currently support over 3,000 law firms throughout the US and countless pro‑se parties.

Senior Back End Engineer – Mobile Team

If you thrive in fast‑paced environments, love solving complex technical challenges, and are passionate about building high‑performance mobile experiences, this role is for you.

Responsibilities

• Lead the design, development, and maintenance of Proof’s backend services, ensuring high availability, scalability, and security across our platform.
• Architect and optimize database schemas, queries, and data pipelines to support growing data volumes and complex business requirements. Build and maintain robust RESTful APIs that power our web and mobile applications, with a focus on performance and developer experience.
• Collaborate with mobile and frontend engineers to design efficient API contracts and ensure seamless integration across platforms.
• Identify and address performance bottlenecks, implement caching strategies, and optimize system reliability.
• Work closely with cross‑functional teams, including Product and Design, to deliver impactful features within an agile development environment.
• Conduct thorough code reviews, uphold best practices, and contribute to a culture of technical excellence.
• Provide mentorship to other engineers.
• Stay current with backend development trends and bring innovative ideas and technologies to the team to continuously improve the platform.

Qualifications

• 5+ years of backend development experience, demonstrating proficiency in building, testing, and deploying scalable web services and APIs.
• Strong experience with relational databases (PostgreSQL preferred), including schema design, query optimization, and data modeling.
• Strong proficiency in Go, with experience building production services in a Go‑based backend environment.
• Proven ability to design and build RESTful APIs, with exposure to GraphQL being an advantage.
• Experience with cloud infrastructure (AWS, GCP, or Azure), containerization, and deployment pipelines.
• Familiarity with CI/CD practices, automated testing frameworks, and infrastructure‑as‑code tools.
• Strong communication and collaboration skills, with experience working in remote, agile teams.
• A proactive, self‑driven mindset with a passion for solving complex problems and continuously learning.

Nice to Have

• Experience with geospatial data and tools such as Uber’s H3 library, PostGIS, or similar spatial indexing systems.
• Advanced PostgreSQL optimization skills, including query tuning, indexing strategies, and handling large‑scale datasets.
• Experience with or understanding of mobile development, particularly React Native, and the unique requirements of mobile‑backend integration.
• Familiarity with legal technology or document processing workflows.
• Experience with event‑driven architectures or message queues.

What We Offer

• Full‑time, salaried position.
• Fully remote role, based in Canada.
• Flexible time off and holidays to support work‑life balance.
• Company‑provided equipment and tools.
• Comprehensive benefits package, including healthcare, dental, life, and long‑term disability.

Compensation and Benefits

• Full‑time, remote role (Canada‑based).
• Salary range: $120,000 – $160,000 CAD based on experience and location.
• Flexible time off & holidays to support work‑life balance.
• Comprehensive benefits, including healthcare, dental, life, and long‑term disability.
• Equipment & tools provided.