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339 senior full stack developer jobs at 143 companies in Niagara Falls, NY

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Senior Full Stack Developer
Toronto or Montreal
$100k-$130k/yr HybridFull Time
TravelBrands
TravelBrands: Canadian travel wholesaler and retailer providing comprehensive booking solutions.
5+ YOESenior full stack developer with Node.js/NestJS, TypeScript, React/Next.js, AWS serverless, SQL/NoSQL, and CI/CD; mentoring and cross-functional collaboration.
Node.js, NestJS, TypeScript, React, Next.js, PostgreSQL, MongoDB, DynamoDB, Elasticsearch, AWS, S3, Lambda, Docker, Terraform, Jest, Mocha
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3mo
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Senior Full Stack Engineer
Toronto, Ontario, Canada
OnsiteFull Time
KEV Group
KEV Group: Software for school activity fund management and accounting.
8+ YOESenior full-stack engineer with deep experience in C# and ASP.NET, React frontend, and distributed SaaS systems; strong knowledge of SQL and cloud platforms; reliability and security focus.
React, JavaScript, HTML, CSS, C#, ASP.NET, SQL, Azure, REST APIs, NET
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3mo
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Senior Full Stack Engineer
Mississauga, Ontario, Canada
OnsiteFull Time
Royal Bank of Canada
Royal Bank of CanadaTSX: RY: Provides personal, commercial, and investment banking services worldwide.
3+ YOE3+ years Salesforce engineering; 5+ years full stack development; CI/CD experience; GenAI tools; API design and testing.
Salesforce.com Development, Microsoft .NET Platform, React.js, JavaScript, Node.js, Git, CI/CD, SFDX, Flosum, Gearset, Copado, Copilot, Windsurf, Claude, MuleSoft, Kafka, Kubernetes, Docker, Azure, AWS
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1mo
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Senior Full Stack Developer
Toronto, Ontario, Canada
$85k-$125k/yr HybridFull Time
Scribendi
ScribendiTokyo Stock Exchange: 2413: Provides professional editing and AI-powered grammar correction tools.
5+ YOE5+ years full-stack production experience with React/Next.js/Node.js/PHP/Python; MySQL/PostgreSQL; AI APIs; strong architecture, ownership, and collaboration.
React, Next.js, Node.js, PHP, Python, MySQL, PostgreSQL, APIs, AI
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3mo
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Senior Full Stack Developer
Toronto, Ontario, Canada
$150k-$190k/yr HybridFull Time
Quartermaster
Quartermaster: Home management platform and marketplace for local service professionals.
6+ YOE2+ Mgmt6+ years full-stack experience; 2+ years leading projects or teams; fluent in JavaScript/TypeScript; strong React; Node.js or similar; experience building APIs, data modeling, and cloud deployment.
React, Next.js, Node.js, Express, Koa, NestJS, PostgreSQL, MySQL, MongoDB, DynamoDB, Redis, REST, GraphQL, gRPC, Redux Toolkit, Zustand, React Query, SSR, ISR, SSG, Webpack, Vite, Babel, SWC, domain-driven design, hexagonal architecture, OpenTelemetry, Honeycomb, Prometheus, StatsD, GitHub Actions, CircleCI, ArgoCD, S3, Kafka, NATS, Docker, Kubernetes
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2mo
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Senior Full-Stack Developer
Toronto, Ontario, Canada
$130k-$145k/yr RemoteFull Time
ODAIA
ODAIA: AI commercial intelligence software for life sciences companies.
5+ YOE5+ years of full-stack experience; API design; React/TypeScript; AWS; REST; data structures; cross-functional collaboration.
Python, JavaScript/Node.js, Java, .NET, React, TypeScript, REST APIs, PostgreSQL, MongoDB, AWS
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1w
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Senior Full Stack Engineer
Toronto, Ontario, Canada
HybridFull Time
HSBC
HSBCLondon Stock Exchange: HSBA: Provides global banking and financial services to individuals and businesses.
Hands-on full-stack DevOps engineer with technical leadership, production support, API and database experience, and ability to manage multiple teams and deliver reliable services.
Java, JavaScript, Clojure, Python, PostgreSQL, Unix, Windows, REST
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6d
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Senior Full Stack Engineer
Toronto, Ontario, Canada
$117k-$175k/yr HybridFull Time
HSBC
HSBCLondon Stock Exchange: HSBA: Global banking and financial services provider.
Hands-on full-stack DevOps engineer with leadership experience, coding across multiple languages, API design, database and infrastructure knowledge, observability and incident management.
Java, JavaScript, Clojure, Python, PostgreSQL, Unix, Windows, REST
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3w
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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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3w
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Senior Full-Stack Developer [Risk]
Vancouver or Toronto or Montreal or Phoenix or Canada or United States
$120k-$140k/yr OnsiteFull Time
ScalePad
ScalePad: Asset management and automation software for Managed Service Providers.
7+ YOE7+ years SaaS development experience; strong full-stack skills across front-end and back-end; proficient with Java, Python, C#/.NET, React/TypeScript; experience with LangChain/LangGraph, vector databases, SQL, AWS; CI/CD and DevOps familiarity.
Java, C#, .NET, React, TypeScript, Angular, REST APIs, SQL, AWS, Python, LangGraph, LangChain, OpenAI, Vector databases, RAG retrieval, CI/CD, DevOps
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1mo
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Senior Full Stack Developer - Web Platform
Toronto or Canada
$65-$85/hr HybridContract
Sago Mini
Sago MiniTSX: TOY: Develops educational mobile apps and physical toys for preschoolers.
5+ YOESenior full-stack engineer with 5+ years experience; strong TypeScript/JavaScript, NestJS/Express, PostgreSQL, modern frontend (React/Next.js/Vue); AWS/cloud experience; familiarity with Stripe/GTM and AI coding tools (GitHub Copilot, Claude, Codex).
GitHub Copilot, Claude, Codex, TypeScript, JavaScript, NestJS, Express, PostgreSQL, React, Next.js, Vue, Stripe, GTM, AWS
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1mo
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Senior Full Stack Engineer
Toronto or United States or United Kingdom or Canada or India
HybridFull Time
Codal
Codal: A design and development agency building digital solutions.
4+ YOE4+ years full-stack development experience with React/NextJS (TypeScript) and backend using Python (Django/FastAPI) or Node.js (Express/NestJS); REST/GraphQL, relational DBs (PostgreSQL/MySQL), cloud (AWS/GCP/Azure), Git and CI/CD (GitHub Actions), agile experience.
React, NextJS, TypeScript, Python, Django, FastAPI, Node.js, Express, NestJS, GraphQL, PostgreSQL, MySQL, AWS, GCP, Azure, Git, GitHub Actions, Redux, Context API, Contentful, Contentstack, Sanity, Shopify, BigCommerce, Saleor, Docker, Kubernetes, Terraform, CDK, Prometheus, Grafana, BigQuery, Snowflake
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1mo
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Senior Full Stack Developer/Lead
Toronto, Ontario, Canada
$95k-$145k/yr HybridFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
10+ YOEBachelor's degree,10+ years full-stack experience with Java (Spring Boot), front-end (React/Angular), cloud (AWS/Microsoft Azure/GCP), microservices, P&C insurance domain knowledge, and AI/ML integration experience.
Java, Spring Boot, Spring Cloud, React, Angular, TypeScript, AWS, Microsoft Azure, GCP, PostgreSQL, MongoDB, Snowflake, Databricks, Spark, Terraform, Kubernetes, CI/CD, Microservices, REST APIs, Generative AI
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3w
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Senior Full-Stack Engineer (3D)
London or Toronto
OnsiteFull Time
Autodesk
AutodeskNASDAQ: ADSK: Developing software for architecture, engineering, and entertainment industries.
5+ YOE5+ years full-stack engineering experience; expertise in React, TypeScript, modern HTML/CSS, backend systems (PostgreSQL, s3), REST/GraphQL, CI/CD, and agentic/AI tooling.
React, TypeScript, CSS, HTML, PostgreSQL, s3, RDBs, RESTful, GraphQL, Cursor, Claude Code, Windsurf, LangChain, LangGraph, CrewAI, PydanticAI, LangSmith, Braintrust, Helicone, temporal, Supabase, pgvector, WebSockets, Jenkins, AWS ALBs/ECS
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1mo
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Senior Full Stack Engineer, AI
Toronto, Ontario, Canada
$120k-$150k/yr HybridFull Time
Big Viking Games
Big Viking Games: Develops and operates free-to-play mobile and social games.
5+ YOESeveral years shipping production full-stack web apps; strong TypeScript, Node.js, React/Next.js, SQL/Postgres; end-to-end ownership; AI/agentic workflow experience; disciplined git and testing practices; strong communication and product judgment.
TypeScript, Node.js, React, Next.js, SQL, Postgres, git, LangChain, LlamaIndex, Vercel AI SDK, OpenAI, Anthropic, Gemini
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2w
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Senior Full Stack Software Engineer
Toronto, Ontario, Canada
$113k-$163k/yr HybridFull Time
Manulife
ManulifeTSX: MFC: Provides insurance, wealth management, and investment services globally.
5+ YOE5+ years full-stack development; strong Java, Spring Boot, Python; experience with Docker, Kubernetes, Azure, SQL Server, Databricks; CI/CD; capital markets and derivatives knowledge; AI/ML integration experience.
Java, Spring Boot, Python, Docker, Kubernetes, Azure, SQL Server, Databricks, Bloomberg, Reuters, Murex, Findur, Aladdin, Azure OpenAI, OpenAI APIs
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3w
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Senior full Stack Developer
Toronto, Ontario, Canada
$115k-$120k/yr OnsiteFull Time
Tech Mahindra
Tech MahindraNational Stock Exchange of India: TECHM: Global provider of information technology and business process services.
10+ YOE10+ years software development experience; strong React/Node.js/Java/Spring Boot skills; experience with databases, REST APIs, microservices, cloud (GCP/Azure); bachelor's degree required.
React, React Native, Next.js, JavaScript, TypeScript, Node.js, Express.js, PHP, HTML, CSS, SASS, Tailwind, Bootstrap, Semantic UI, MySQL, MongoDB, PostgreSQL, REST APIs, Microservices, Java, JVM, Spring Boot, Maven, Gradle, GCP Cloud SQL, Spanner, Azure SQL Server, Azure SQL MI, FIGMA
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2mo
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Full Stack Developer (260428)
Toronto, Ontario, Canada
OnsiteFull Time
Scotiabank
ScotiabankToronto Stock Exchange: BNS: Provides global personal, commercial, and investment banking services.
5+ YOEBachelor's in a technical field and 5+ years full‑stack development; proficiency with HTML/CSS, SQL, Node.js/Java/.Net/TypeScript/JavaScript, React/Angular, REST APIs, cloud (Google Cloud Platform preferred), and Jira; Agile experience.
HTML, CSS, SQL, Google Cloud Platform, AWS, Azure, Node.js, Java, Net, TypeScript, JavaScript, React, Angular, REST APIs, Jira
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1mo
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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
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2mo
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.NET Full Stack Developer - Toronto
Toronto, Ontario, Canada
$95k-$125k/yr HybridFull Time
Trisura
TrisuraToronto Stock Exchange: TSU: Provider of specialty insurance and surety solutions.
4+ YOE4+ years end-to-end full stack development with .NET; insurance industry experience; strong API, SQL Server, and front-end skills.
ASP.NET (MVC and Web Forms), C#, HTML5, CSS, JavaScript, jQuery, Angular, Bootstrap, Web API (RESTful), Microsoft SQL Server (T-SQL)
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