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23 senior fullstack developer jobs at 14 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
2mo
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Senior Developer, Fullstack - Canada Pod
Ottawa or Calgary or Toronto
$125k-$165k/yr RemoteFull Time
Fullscript
Fullscript: Healthcare platform for practitioner supplement dispensing and patient management.
Senior fullstack engineer with strong Ruby/Rails and React experience, familiarity with GraphQL and automated testing, ability to build backend systems and user-facing features, and strong cross-functional collaboration skills.
Ruby, Ruby on Rails, React, GraphQL
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2mo
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Senior Fullstack Developer, Consumer
Toronto, Ontario, Canada
$120k-$150k/yr HybridFull Time
HelloFresh
HelloFreshFrankfurt Stock Exchange: HFG: Global meal kit delivery service and food solutions provider.
4+ YOE4+ years in agile software development; strong React JS experience; backend experience with Node.js/Nest/Nx; GraphQL, SQL, testing, and CI/CD; knowledge of storefronts (Shopify) and AI coding tools.
React, Next.js, Nest.js, Shopify, GraphQL, SQL, Node.js, Python, GoLang, Nuxt.js, Remix, Datadog, Sentry, Honeycomb, New Relic, AB testing, Multivariate testing
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1mo
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Senior Fullstack Engineer - Onsite/Hybrid
Toronto, Ontario, Canada
$100k-$120k/yr HybridFull Time
Goway Travel
Goway Travel: Designs and sells tailor-made global travel experiences.
7+ YOE7+ years software engineering experience with strong fullstack skills in Node.js, NestJS, React.js; hands-on AWS experience (Lambda, ECS/Fargate, Cognito, RDS/Postgres, OpenSearch); familiarity with REST/JSON, Jira, GitHub; leadership and mentoring experience.
Node.js, NestJS, React.js, AWS, Lambda, ECS/Fargate, Cognito, RDS/Postgres, OpenSearch, REST/JSON, Jira, GitHub
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1w
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Fullstack Developer
Toronto, Ontario, Canada
$77k-$120k/yr OnsiteFull Time
Wipro
WiproNYSE: WIT: Global technology services and consulting for digital transformation.
5+ YOE5+ years experience in full‑stack Java enterprise development, experience with Spring/Hibernate, frontend frameworks, cloud (Azure), CI/CD, databases, and Agile delivery.
Java, J2EE, Spring, Spring Boot, Spring Test, Hibernate, JavaScript, HTML, CSS, Bootstrap, Angular, React, Microsoft Azure, Jenkins, Linux, Azure SQL, Oracle, Redis, Maven, GitHub, IntelliJ IDEA, Visual Studio, Eclipse, SonarQube, Veracode, JIRA, Confluence, OAuth2, OpenID Connect (OIDC), GitHub Copilot
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2mo
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Senior Fullstack Engineer - Toronto
Toronto, Ontario, Canada
$125k-$165k/yr HybridFull Time
Sokin
Sokin: Provides a global B2B payment and foreign exchange platform.
5+ YOEMinimum 5 years of software engineering; end-to-end feature ownership; backend focus with frontend contribution; strong collaboration; mentoring.
Python, Flask, FastAPI, AWS, Angular, SQL
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2mo
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Fullstack Developer Lead Vice President
Mississauga, Ontario, Canada
$121k-$171k/yr OnsiteFull Time
Citi
CitiNYSE: C: Global diversified financial services holding.
6+ YOE6+ years apps development experience; 5+ years software development with 3+ years full-stack; strong Java (Spring Boot/Framework), ReactJS, RDBMS/NoSQL, CI/CD, cloud (AWS/Azure/GCP), Docker/Kubernetes; bachelor's or equivalent.
Java, Spring Boot, Spring Framework, ReactJS, Flux, Redux, PostgreSQL, Oracle, MySQL, SQL, MongoDB, Cassandra, DynamoDB, Jenkins, GitLab CI, GitHub Actions, Azure DevOps, CI/CD, AWS, Azure, GCP, Docker, Kubernetes, TensorFlow, PyTorch, Kafka, RabbitMQ, JUnit, Mockito, Jest, React Testing Library, GraphQL
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4w
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Fullstack Developer Lead Vice President
Mississauga, Ontario, Canada
$121k-$171k/yr HybridFull Time
Citi
CitiNYSE: C: Providing global banking, investment, and wealth management services.
6+ YOE6+ years apps development experience; 5+ years software development with 3+ years full-stack; strong Java (Spring Boot/Framework), expert ReactJS, RDBMS and NoSQL experience, CI/CD, cloud (AWS/Azure/GCP), containers (Docker/Kubernetes); bachelor’s degree or equivalent.
Java, Spring Boot, Spring Framework, ReactJS, Flux, Redux, PostgreSQL, Oracle, MySQL, MongoDB, Cassandra, DynamoDB, Jenkins, GitLab CI, GitHub Actions, Azure DevOps, AWS, Azure, GCP, Docker, Kubernetes, TensorFlow, PyTorch, Kafka, RabbitMQ, JUnit, Mockito, Jest, React Testing Library, GraphQL
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1mo
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Staff Fullstack Engineer
Toronto or Canada
$175k-$200k/yr HybridFull Time
Bettermode
Bettermode: Builds branded online community platforms for customer engagement.
Expert TypeScript/React/NestJS experience, building and integrating LLM-driven features, product-minded engineering, mentorship experience, and working on multi-tenant systems preferred.
TypeScript, React, NestJS, Claude Code, Cursor, Large Language Models (LLM)
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3mo
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Senior I Fullstack Engineer, Emerging Products & Product Platform
Toronto, Ontario, Canada
RemoteFull Time
Vanta
Vanta: Automated security compliance and trust management software for businesses.
5+ YOE5+ years of full-stack experience; backend focus; leadership of small teams; strong communication; experience with TypeScript, React, Node.js, GraphQL, MongoDB.
React, TypeScript, Node.js, GraphQL, MongoDB
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1d
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Fullstack developer with Python, .NET & AI experience
Toronto, Ontario, Canada
$110k-$120k/yr HybridFull Time
Synechron
Synechron: Providing digital transformation and technology consulting for financial services.
6+ YOEBachelor's in CS,6+ years software development,proficient in Python,.NET,JavaScript and modern frontend frameworks,experience with Pandas/NumPy,SQL,REST APIs,cloud (Azure/AWS/GCP),Docker,microservices and AI/ML integrations.
Python, .NET, React, Angular, JavaScript, Pandas, NumPy, SQL, Apache Airflow, Docker, Azure, AWS, GCP, Claude, GitHub Copilot, Cursor, OAuth2, REST APIs
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2mo
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Sr Software Engineer- Fullstack
Toronto, Ontario, Canada
RemoteFull Time
Agiloft
Agiloft: Provides AI-powered contract lifecycle management and workflow automation software.
5+ YOE5+ years of software engineering experience; strong Python backend and API development; AWS serverless; IaC and observability; React/TypeScript frontend; collaboration with design/product; AI tools in SDLC.
Python, AWS, API Gateway, Lambda, DynamoDB, Terraform, GitHub Copilot, Cursor
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1w
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Senior Software Engineer Fullstack
Ottawa or Toronto
OnsiteFull Time
Dominion Dynamics
Dominion Dynamics: Developing autonomous defense platforms and Arctic sensing technology.
5+ YOE5+ years building production backend and frontend systems; strong Python and JavaScript/TypeScript; SQL/NoSQL and real-time visualization experience; hardware/embedded integration experience; eligibility for Canadian security clearance.
Python, JavaScript, TypeScript, SQL, NoSQL, CI/CD, AI tools
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2w
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Fullstack Software Engineer (x/f/m) - Care Expert Copilot
France or Belgium or Spain or Toronto
HybridFull Time
Alan
Alan: Digital health insurance and vertically integrated healthcare services provider.
5+ YOE5+ years building scalable full-stack systems; backend and frontend experience; experience with React, Python/Flask, PostgreSQL; strong problem-solving and communication.
React, Python, Flask, PostgreSQL
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1mo
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Associate Director, Lead Fullstack Developer (React/Node.js)
Toronto, Ontario, Canada
OnsiteFull Time
Royal Bank of Canada
Royal Bank of CanadaTSX: RY: Provides personal, commercial, and investment banking services worldwide.
10+ YOE3+ Mgmt10+ years software engineering experience with MERN/TypeScript, Next.js, NestJS, Docker, Kubernetes; 3+ years people management; experience with cloud, CI/CD, CI tools, design systems, REST/GraphQL.
MongoDB, Express.js, React.js, Node.js, Next.js, NestJS, Docker, Kubernetes, TypeScript, GraphQL, WebSockets, SQL Server, PostgreSQL, AWS, Azure, GCP, Helm, Terraform, Nx, Redis, KeyDB, Solace, Kafka, MUI, Storybook, CI/CD
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