283 senior full stack engineer jobs at 143 companies in Grand Island, NY

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Senior Full-Stack Engineer (Media Team)
Ottawa or Toronto
$120k-$145k/yr HybridFull Time
Solink
Solink: Provides cloud-based video security and business intelligence analytics.
Senior-level backend or full-stack engineer with strong cloud (AWS) and distributed systems experience, observability knowledge, and service ownership mindset.
AWS, SQS, S3, Lambda, EKS, Redis, CloudFront, OpenTelemetry, Datadog, Grafana, Honeycomb, WebRTC, HLS, RTSP, ffmpeg, Kubernetes, GCP, Azure, TypeScript, Rust
1w
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Senior Full Stack Developer
Toronto or Montreal or Canada
$95k-$145k/yr OnsiteFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
Experienced full-stack engineer with enterprise frontend and backend development expertise, modern architecture knowledge, strong analytical and communication skills, and Agile/Scrum collaboration experience.
JavaScript, TypeScript, React, Angular, Vue.js, HTML5, CSS3, Java, Spring Boot, Spring Security, Hibernate, C#, .NET 8, ASP.NET Core, EF Core, Node.js, NestJS, Express, Python, FastAPI, Django, Go, REST, GraphQL, gRPC, OpenAPI, Swagger, Apigee, OAuth2, OIDC, Azure, AWS, GCP, Docker, Kubernetes, AKS, GKE, Red Hat OpenShift, Terraform, Bicep, GitHub Actions, Microsoft Azure DevOps, Jenkins, PostgreSQL, SQL Server, Oracle, MongoDB, Redis, CosmosDB, Apache Kafka, RabbitMQ, JUnit, xUnit, Jest, Cypress, Playwright, SonarQube, Datadog, Splunk, Dynatrace, ELK Stack, Grafana, Prometheus, Azure Application Insights, Microsoft Semantic Kernel, LangChain4j, Spring AI, Model Context Protocol, GitHub Copilot, Amazon Q, Backstage, Snowflake, Databricks, Azure Data Factory, Power BI
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Senior Full Stack Engineer
Toronto, Ontario, Canada
$120k-$145k/yr HybridFull Time
Fiera Capital
Fiera CapitalToronto Stock Exchange: FSZ: Provides multi-asset investment solutions to global clients.
5+ YOE5+ years full-stack experience with C#/.NET, SQL and Azure; bachelor\u0002s degree in a technical field; strong design, testing, troubleshooting, and communication skills.
C#, .NET, .NET Core, SQL Server, Azure Functions, App Services, Azure SQL, Storage Accounts, Key Vault, Python, Blazor, JavaScript, HTML/CSS, Azure Data Factory, Azure DevOps, Git, CI/CD, REST APIs, Entity Framework
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Senior Full Stack Engineer
Toronto, Ontario, Canada
$133k-$182k/yr RemoteFull Time
Mattermost
Mattermost: Secure collaboration platform for defense and enterprise teams.
Full-stack development experience with Go and React or comparable technologies; REST and WebSocket APIs; PostgreSQL and schema design; AI coding agents; networking, testing, security, and end-to-end software ownership.
Go, React, TypeScript, PostgreSQL, Redis, Claude Code, Cursor, Copilot, REST, WebSocket, MCP
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Senior Full-Stack Developer
Toronto or Canada
$120k-$160k/yr RemoteFull Time
Flinks
Flinks: Embedded finance platform for financial data connectivity and payments.
6+ YOE6+ years building production full‑stack web applications with production experience in Angular, TypeScript, and C#/.NET; Bachelor’s in CS or equivalent experience; ability to own features end‑to‑end and work in a remote, collaborative environment.
Angular, TypeScript, RxJS, NgRx, Angular Material, Tailwind CSS, C#/.NET, Entity Framework Core, PostgreSQL, SQL Server, Redis, Firestore, Google Cloud Platform, Kubernetes, Docker, Terraform, Pub/Sub, Microsoft Azure DevOps, Git, Webpack, Cypress, Playwright, Grafana, REST APIs
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Senior/Staff Full-Stack Engineer
South San Francisco or Toronto
$150k-$250k/yr HybridFull Time
Tahoe Therapeutics
Tahoe Therapeutics: Building virtual cell models for accelerated drug discovery
Deep full-stack experience building frontend, backend, database, deployment, and secure, reliable production applications; strong communication and collaboration in small teams.
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Full Stack Developer
Toronto, Ontario, Canada
$104k-$130k/yr OnsiteFull Time
UST
UST: Global provider of digital transformation and IT services.
Full-stack development experience with Node.js or Java, React or Angular, RESTful APIs, microservices, authentication flows, cloud platforms, and secure coding practices.
Node.js, React.js, Java, React, Angular, OAuth, SSO, MFA, RESTful APIs, AWS, Azure, GCP
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Full Stack Developer
Toronto, Ontario, Canada
$2k-$4k/mo OnsitePart Time, Contract
MarkiTech
MarkiTech: Develops AI-powered healthcare software and digital automation solutions.
Several years of full-stack development experience with JavaScript, TypeScript, React, Node.js, Express, REST APIs, Git, secure integrations, and cloud deployment experience.
React, JavaScript, TypeScript, Node.js, Express, GitHub, Docker, GCP, AWS, Azure, Firebase, Firestore, MongoDB, Socket.IO, Python, Git, REST API, FHIR, HL7, EMR, CI/CD
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Full Stack Developer
Toronto, Ontario, Canada
OnsiteFull Time
Kumaran Systems
Kumaran Systems: Global provider of digital transformation and legacy modernization solutions.
5+ YOE5+ years experience building full-stack web applications using Java/Spring Boot, Python frameworks, React/TypeScript, SQL; strong problem-solving and communication skills.
Java, Spring Boot, SQL, Fast API, Flask, Django, JavaScript, TypeScript, ReactJS, Git, Microsoft Azure, OpenAI, LangChain, vector databases
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Staff Full Stack Engineer
Calgary or Toronto
OnsiteFull Time
Robots & Pencils
Robots & Pencils: Creates mobile applications and AI-driven digital transformation solutions.
7+ YOE7+ years full-stack engineering experience, deep frontend (React/Angular/Next.js/TypeScript) and backend (Node.js/Python) skills, cloud/CI-CD, databases, testing, and experience integrating AI services.
React, Angular, Next.js, TypeScript, Node.js, Python, Claude, Cursor, Figma, LLM APIs, CI/CD
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Senior Full-Stack Engineer, North Tools & Retrieval
Europe or London or San Francisco or New York City or United Kingdom or Toronto or Montreal or Paris or Berlin or Seoul
$180k-$310k/yr RemoteFull Time
Cohere
Cohere: Provides enterprise-grade large language models and AI software platforms.
Production full-stack experience with Python and React; strong cross-stack coding, end-to-end feature ownership, performant RAG or agentic applications, product judgment, and UX focus.
Python, React
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Senior Full Stack Engineer, App Runtime
Toronto, Ontario, Canada
$245k-$295k/yr OnsiteFull Time
Snowflake
SnowflakeNYSE: SNOW: Cloud-based platform for data storage, processing, and analytics.
5+ YOEBachelor's in CS or related,5+ years frontend/full-stack experience,proficiency with React and TypeScript/JavaScript,experience with Go/Python/Java,knowledge of modern web architecture and API design,strong communication.
React, Go, Python, Java, TypeScript, JavaScript, NextJS, Node.js
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Senior Full Stack Engineer, Designer Team
Toronto or New York City
$130k-$182k/yr OnsiteFull Time
Movable Ink
Movable Ink: Provides AI-powered content personalization for digital marketing campaigns.
5+ YOE5+ years building production software; independently ships full-stack features in large codebases; proficiency in at least two core languages; writes tested code and demonstrates collaboration, judgment, and technical ownership.
TypeScript, Ruby, Python, Rust, Go, C++
2d
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Senior Full Stack Software Engineer
Waterloo or Toronto
$113k-$163k/yr HybridFull Time
Manulife
ManulifeNYSE: MFC: Provides life insurance, investment management, and global financial services.
Full-stack expertise in JavaScript/TypeScript, React, Node.js, GraphQL, cloud platforms, Azure Kubernetes, K9s, Terraform, MongoDB Atlas, scalable architecture, testing, CI/CD, and observability.
JavaScript, TypeScript, React, Redux, Node.js, GraphQL, MongoDB, .NET, Java, Azure Kubernetes, K9s, Terraform, MongoDB Atlas, New Relic, Moogsoft, CI/CD, Scaled Agile, AI
2mo
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Senior Full-Stack Developer
Toronto, Ontario, Canada
$140k-$160k/yr HybridFull Time
Priceline
PricelineNASDAQ: BKNG: Online platform for booking flights, hotels, and rental cars.
7+ YOEBachelor's or equivalent, 7+ years software engineering experience, strong JavaScript/TypeScript, NodeJS, GraphQL, SQL/NoSQL, React/NextJS, API and microservices experience, Git, and applied AI familiarity.
JavaScript, TypeScript, NodeJS, GraphQL, SQL, NoSQL, HTML, CSS, React, NextJS, Git, Git flow, Github flow, Java, Kotlin, Python, ML, Data Science
1mo
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Senior Full-Stack Automation Engineer – Gravity
Toronto, Ontario, Canada
$115k-$176k/yr HybridFull Time
MedMe Health
MedMe Health: Cloud-based pharmacy care management and medical billing platform.
5+ YOEMust be a Canadian citizen based in Canada; 5+ years software engineering with heavy desktop automation experience; expert Python and Node.js; hands-on React, AWS, SQL; AI/ML familiarity; strong client communication.
Python, Node.js, React, AWS, SQL
1w
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Senior Full-Stack Engineer
Etobicoke, Ontario, Canada
$145k-$165k/yr HybridFull Time
Prophix
Prophix: Provides financial performance and corporate performance management software.
5+ YOERequires 5+ years of professional software development experience, C# and .NET/Core, PostgreSQL, AWS cloud services, distributed architectures, testing, Git, English communication, and a computer science or related degree or equivalent experience.
C#, .NET, PostgreSQL, Entity Framework, AWS Lambda, AWS SQS, AWS Aurora Serverless, AWS S3, MassTransit, Quartz.NET, xUnit, Moq, FluentAssertions, Git, Windows, Linux, OAuth2, OIDC, JWT, SSO, MFA, MCP
2mo
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Senior AI Full-Stack Software Developer (Python/React)
Toronto or Montreal
$119k-$145k/yr HybridFull Time
Intact Financial
Intact FinancialToronto Stock Exchange: IFC: Provides property and casualty insurance to individuals and businesses.
5+ YOESenior AI full-stack developer with 5+ years experience, TS/React, Python, AWS, REST/Swagger, AI concepts (GenAI, MLOps); bilingual in Quebec; eligible to work in Canada.
TypeScript, React, Python, AWS, REST, Swagger, MLOps
1mo
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Senior Full Stack Developer
Toronto, Ontario, Canada
$120k-$150k/yr HybridFull Time
Citco
Citco: Provides fund administration and asset services for alternative investment funds.
5+ YOE5+ years web development experience with React, NodeJS/Express, HTML5/CSS3/JavaScript/JSON, RESTful services, GIT, ANSI SQL, Jira/Confluence, AWS or Azure; financial industry knowledge.
React, NodeJS, Express, HTML5, CSS3, JavaScript, JSON, GIT, SQL, Jira, Confluence, AWS, Azure
1mo
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Senior Full Stack Developer
Toronto, Ontario, Canada
OnsiteFull Time
Royal Bank of Canada
Royal Bank of CanadaTSX: RY: Provides personal, commercial, and investment banking services worldwide.
Bachelor's in CS or related; strong experience with Java, Spring Boot, JMS, Kafka, MongoDB, MQ, REST, cloud (OpenShift/AWS/Azure); GitHub/GitHub Actions, Jira, Confluence; refactoring legacy systems; strong communication.
Java, Spring Boot, JMS, Kafka, MongoDB, MQ, OpenShift, AWS, Azure, REST, GitHub, GitHub Actions, Jira, Confluence, Angular, Gen AI