senior full stack software developer jobs in Toronto

Build patient-facing healthcare products with React and TypeScript as a Senior Full-Stack Developer at Blair Health in Toronto, working hybrid three days onsite.You will own features across React, Next.js, Python, and Supabase. Blair Health’s small engineering team builds tools for patients, clinicians, and employer clients. Your work spans intake,...

Drive innovative web solutions as a Senior Full Stack Software Developer with the Ministry of Public and Business Service Delivery in Toronto. This onsite role demands Java expertise and modern front-end skills in a dynamic Agile setting. Join the Community Services Cluster, engaging in an 11-month contract to develop and maintain enterprise applications at...

Location: Toronto, ON (Hybrid) Company: Cogency Employment: Full-Time About Cogency Cogency is a Toronto-based consulting and technology services firm specializing in enterprise digital transformation across the Banking, Financial Services, and Insurance (BFSI) sector. We partner with leading organizations to modernize platforms, enhance operational...

TitleSoftware Developer - Full StackDescription Demonstrated experience designing, developing and integrating AI-enabled applications, including Large Language Models (LLMs), AI agents, agent-based workflows, document processing solutions, and human-in-the-loop review and approval processes. This role will support the development of the Curriculum AI...

Build Ford’s FNV Diagnostics Cloud with Java, relational databases, front-end development, and scalable data ingestion in a hybrid position. Solve complex platform challenges. As a senior developer, you will work within Ford’s Diagnostics and Analytics platform team. Your focus includes design and strategy, mentorship, governance, and data enhancement...

Build AWS-based applications in Toronto’s hybrid Senior Full Stack Developer position, combining backend architecture with hands-on API development. Work onsite two days weekly while shaping secure, scalable solutions.Red Pico seeks a Senior Full Stack Developer to own backend architecture for self-service and access visibility solutions. You will develop...

Mosaic Clinical Technologies is seeking a Senior Full Stack Developer to advance innovative imaging solutions. This hybrid role in Toronto involves cloud-native app development and AI integration with healthcare systems. As a key member of the team, you will design and maintain scalable infrastructures, develop APIs, and optimize AI pipelines. This position...

The Senior Web Developer builds and delivers production web experiences and supporting services for life sciences brands as part of Klick's Full Stack + AI team. The role combines deep web engineering expertise with AI-native development practices, using coding agents, structured context, automated verification, and human review to improve delivery quality...

Build AI tools in Toronto as a Senior Full Stack Developer using responsive interfaces, secure back-end systems, and cloud architecture. Work full time.RBC seeks a Senior Full Stack Developer to guide ideas from concept through functional prototype. You will collaborate with business SMEs, architects, designers, product managers, and engineers. The work...

3 weeks ago Be among the first 25 applicants Company Overview Athennian increases trust in business. Our products help legal, finance, and tax teams be transaction and audit-ready by organizing business entity and corporate structure information. Over 370,000 business entities in almost every country are managed on Athennian to automate workflows for...

Build Python and Angular or React solutions in Intact’s hybrid work model, integrating artificial intelligence into insurance operations. Own delivery across the stack.As a Senior Full Stack AI Developer, you will develop backend services with Python and FastAPI alongside front-end applications. You will connect AI solutions with insurance systems, data...

Putting people first, every day BDO is a firm built on a foundation of positive relationships with our people and our clients. Each day, our professionals provide exceptional service, helping clients with advice and insight they can trust. In turn, we offer an award‑winning environment that fosters a people‑first culture with a high priority on your...

Putting people first, every day BDO is a firm built on a foundation of positive relationships with our people and our clients. Each day, our professionals provide exceptional service, helping clients with advice and insight they can trust. In turn, we offer an award-winning environment that fosters a people-first culture with a high priority on your personal...

Build secure, scalable software with C#, ASP.NET MVC, and REST APIs as a Senior Full Stack Developer in BDO’s hybrid downtown Toronto role. BDO seeks a skilled Full Stack Developer with strong Microsoft .NET expertise for multi-tier application development. You will work with C#, VB.NET, ASP.NET MVC, Webforms, relational databases, and RESTful services....

ABOUT ODAIA ODAIA noun o·da·ia | 'oh-day-yeah An Ancient Greek word referring to "ōdē," the word for song and the root of melody, harmony, and orchestra. We chose it deliberately: the best commercial intelligence doesn't just inform it orchestrates. ODAIA delivers AI-powered commercial intelligence for life sciences - unifying data, accelerating results,...

Elevate the fintech landscape as a Senior Engineer specializing in full-stack development at Relay. Focus on building reliable solutions for small business owners in a digital banking environment. As part of Relay's engineering team, your 3+ years of experience will help shape our banking products. You’ll be responsible for the development lifecycle of...

Deliver end-to-end features with Java, Spring Boot, React, and TypeScript at Agilno, through a hybrid GTA or Pacific remote arrangement.Agilno seeks a Senior Java Developer for software spanning web, mobile, Microsoft Office applications, and integration partners. Your focus will remain backend architecture and development, with frontend contributions...

Gigi is the agentic operating system of enterprise media buying. Our first product is the AI media manager for Amazon DSP. Since launching it in summer 2025, we've grown to manage hundreds of millions in advertising spend on behalf of the largest agencies in the world. We're backed by top venture investors Golden Ventures and Aperiam Ventures. Our founding...

Build AI-powered commercial intelligence at ODAIA as a Senior Software Engineer using React, TypeScript, APIs, and AWS. Work remotely across Canada and the United States. This senior engineering role spans frontend and backend systems for life sciences commercial teams. You will design, build, and ship products with product, design, and ML engineering....

Design and build scalable applications for data acquisition, management, and visualization Build and maintain full-stack Nota features, from React components through GraphQL schemas to PostgreSQL query performance Design, deploy, and scale ML inference services on Ray Serve and Kubernetes, including model versioning, autoscaling, and observability ...