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Perseus Group, Constellation Software · 2 days ago

Senior Software Developer

United States

Full-time

Remote

Mid, Senior Level

$120K/yr - $180K/yr

6+ years exp

Perseus Group, part of Constellation Software, is a leading provider of integrated technology solutions for the real estate industry. They are seeking a Senior Software Developer to design and deliver cloud-native services while mentoring teammates and enhancing product reliability and scalability.

Enterprise SoftwareFinancial ServicesInformation TechnologySecuritySoftware

H1B Sponsor Likely

Hiring Manager

Maria Alimisis

Responsibilities

Design & deliver cloud-native applications using modern patterns (serverless, event-driven, containerized) with a focus on scalability, resilience, and cost efficiency

Own the full stack: React + TypeScript on the front end; .NET (C#) and/or Node.js/TypeScript on the back end; SQL as a primary store, augmented by NoSQL where it fits

Build robust APIs (REST/JSON; GraphQL a plus), integrating with internal, third-party, and AI-powered services securely and efficiently

Craft intuitive, performant, and accessible UIs using modern web frameworks, ensuring responsive design across devices and optimizing for SEO and usability

Apply Infrastructure as Code (IaC) to define, provision, and evolve cloud infrastructure

CI/CD & release engineering: automate build/test/deploy with modern pipelines

Security by default: embed security best practices across the SDLC

AI & Data Integration: work with data pipelines, AI/ML APIs, and analytics tooling to enrich applications with intelligent search, personalization, and automation

Mentor & lead: guide code reviews, pair program, evolve standards, and coach developers on cloud patterns, AI integration, and clean architecture

Collaborate with Product and Design to turn ambiguous requirements into clear, testable, high-impact deliverables

Writing clean, well-documented code that adheres to team standards and best practices

Take ownership of coding assignments with minimal supervision required

Qualification

Cloud-native developmentC#/.NETTypeScript/Node.jsSQLReactInfrastructure as CodeCI/CD pipelinesDistributed systemsAgile/ScrumCommunicationProblem-solving

Required

6+ years building and operating production web applications at scale

3+ years hands-on with cloud-native development in production

Strong proficiency in C#/.NET and/or TypeScript/Node.js for backend services

Strong experience with SQL (schema design, performance tuning, query optimization) and familiarity with NoSQL patterns where appropriate

Front-end experience with modern web UI frameworks (React preferred), delivering responsive, accessible UIs

Experience with IaC and automated CI/CD pipelines

Solid grasp of distributed systems concepts: idempotency, retries/backoff, eventual consistency, partitioning, caching

Excellent communication; able to simplify complex trade-offs and lead design reviews

Strong ability to solve complex problems independently

Experience working in an Agile/Scrum environment

Preferred

.NET 8 + ASP.NET Core, minimal APIs, and background services

Next.js or similar (SSR/ISR) and web performance/SEO fundamentals

Experience integrating search and recommendation systems (OpenSearch, Elasticsearch, or AI-based search)

Experience with data streaming, CDC patterns, and real-time event processing

Experience with AI/ML APIs (e.g., NLP, recommendation engines, generative AI for content automation)

Multi-tenant SaaS experience with SSO, feature flagging, and tenant isolation

Benefits

Medical

Dental

Vision

Basic life insurance

Short/long term disability

401(k) participation (with company match)

10 days of vacation for new employees

Sick time based on state requirements

8 Company-paid holidays

2 personal holidays per year

Company

Perseus Group, Constellation Software

“While other purchasers of business seek economies of scale through centralization, we have taken the opposite approach.

Founded in 2004

Markham, Ontario, CAN

10001+ employees

https://csiperseus.com/

H1B Sponsorship

Perseus Group, Constellation Software has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

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Trends of Total Sponsorships

2025 (2)

2024 (3)

2023 (12)