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254 senior software engineer react jobs at 142 companies in Brookline, MA

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Senior Software Engineer, Lab Software
Cambridge, Massachusetts, United States
$144k-$210k/yr OnsiteFull Time
Lila Sciences
Lila Sciences: Develops an AI platform for autonomous scientific research and discovery.
5+ YOESenior backend-focused software engineer with 5-8+ years of experience building large-scale systems; full-stack development; Python, FastAPI, React, TS, SQL/NoSQL; cloud, AWS, Kubernetes; collaboration with scientists.
React, TypeScript, Tailwind, FastAPI, SQL, NoSQL, Python, Pydantic, AWS, Kubernetes, Terraform, CloudFormation, GitHub Actions, Airflow, Prefect, Temporal, Dagster
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Senior Software Engineer
Merrimack or Smithfield
OnsiteFull Time
Fidelity Investments
Fidelity Investments: Provides investment management, retirement planning, and brokerage services.
Senior software engineer with RESTful APIs, JavaScript frameworks, databases, SDLC, CI/CD, mentoring, and strong OO design.
JavaScript, Angular, AngularJS, Backbone.js, React.js, CSS3
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Software Engineer, React Focus
Nashua, New Hampshire, United States
$118k-$201k/yr HybridFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
6+ YOERequires 6+ years building production software, 4+ years with TypeScript/JavaScript and Node, deep React expertise, system-level design ownership, mentoring, strong writing, and ability to obtain a DoD Secret clearance as a U.S. citizen.
TypeScript, JavaScript, Node, React, Next.js, gRPC, Protocol Buffers (protobuf), Turborepo, Nx, REST, Playwright, AG Charts, D3, Storybook, CI/CD
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Senior Software Engineer
Boston, Massachusetts, United States
OnsiteFull Time
Levo
Levo: A building AI-powered workforce platform for healthcare providers.
3+ YOE3-6 years software engineering; React, TypeScript, Python; experience with LLMs and agentic workflows; product-minded; shipping production systems.
React, TypeScript, Python, LLMs, APIs, CI/CD
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Senior Software Engineer
Boston, Massachusetts, United States
$140k-$165k/yr HybridFull Time
Pixability
Pixability: Optimizes video ad performance across YouTube and Connected TV.
6+ YOE6+ years of professional software engineering; strong backend with Python; data pipelines or large-scale systems; production web apps, APIs, distributed systems; React frontend; MySQL/Snowflake; AWS; Docker, Terraform, CI/CD; testing; collaborative; Boston office 2 days/week.
Python, React, AWS, Docker, Terraform, CI/CD
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Senior Software Engineer
Boston, Massachusetts, United States
$140k-$160k/yr HybridFull Time
Grand Circle Corporation
Grand Circle Corporation: Provides international adventure travel and cruises for senior citizens.
5+ YOE5–8+ years full-stack engineering; C#/.NET or Java; React/TypeScript; APIs; SQL; Git; CI/CD; Azure; Agile; secure coding.
C#, Java, React, TypeScript, SQL, Git, CI/CD, Azure, Cloud
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Senior Software Engineer
United States or Boston
$125k-$254k/yr RemoteFull Time
Toast
ToastNYSE: TOST: Cloud-based technology platform for the restaurant and hospitality industry.
5+ YOE5+ years in software engineering; proficient in Java, Kotlin; REST/GraphQL; relational databases; React front-end a plus.
Java, Kotlin, REST, GraphQL, Relational Databases, React
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2w
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Staff Software Engineer - Full Stack - (React, Node)
Boston, Massachusetts, United States
$185k-$215k/yr RemoteFull Time
Linus Health
Linus Health: Digital health platform providing AI-powered cognitive assessment tools.
8+ YOE8+ years software engineering experience; strong full-stack skills with React and Node.js; TypeScript experience; leadership of distributed teams; excellent communication and technical judgment.
React, Node.js, TypeScript, React Native, AWS
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Senior Software Engineer
Waltham, Massachusetts, United States
$147k-$198k/yr OnsiteFull Time
Markforged
MarkforgedNYSE: MKFG: Manufacturer of industrial 3D printing systems, software, and materials.
5+ YOE5+ years experience building and shipping high-quality full-stack software; Bachelor's in Computer Science or equivalent; strong JS/TS skills; React/Angular/Vue; Node.js/Express or Python frameworks; UX design basics; AWS/CI/CD; PostgreSQL; Figma; WebGL/Three.js; CAD/CAM knowledge.
Node.js, Express, React, Angular, Vue.js, Python, Django, Flask, AWS, GCP, Azure, PostgreSQL, Figma, WebGL, Three.js, D3, CAD/CAM
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3mo
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Senior Software Engineer
Boston or Chicago or Dallas or San Francisco
$120k-$150k/yr OnsiteFull Time
JLL
JLLNYSE: JLL: Global commercial real estate and investment management services.
7+ YOE7+ years in full stack software engineering; Python and Node.js; API/microservices experience; front-end frameworks; cloud (Azure/AWS/GCP); AI/RAG knowledge a plus; CI/CD and testing.
Python, Node.js, React, Angular, Docker, Kubernetes, Git, GitHub, Azure DevOps, SQL Server, CosmosDB
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2mo
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Senior Software Developer
Boston, Massachusetts, United States
$150k-$200k/yr RemoteFull Time
Interra Health
Interra Health: Provides digital tools for ePrescribing and pharmacy price transparency.
10+ YOE10+ years in .NET (C#) and React; Azure; SQL Server; API design; CI/CD; agile; regulatory experience preferred.
.NET Core (C#), React, TypeScript, Azure, MS SQL Server, OAuth2, JWT, GitHub Actions, Azure DevOps, Docker, Kubernetes, OpenTelemetry, App Insights, CI/CD
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Senior Software Engineer
Waltham, Massachusetts, United States
HybridFull Time
SS&C Technologies
SS&C TechnologiesNasdaq: SSNC: Provides software and technology for financial and healthcare sectors.
5+ YOE5+ years of software development; full-stack SaaS experience; clean, maintainable code; strong communication; able to work in fast-paced environment.
TypeScript, JavaScript (Node.js), Python, Java, React, Spring Boot, Express, Flask, REST, GraphQL, gRPC, Protobuf, AsyncAPI, PostgreSQL, MongoDB, Cassandra, Redis, Docker, Kubernetes, Helm, Ansible, Terraform, OpenTofu, OpenTelemetry, Prometheus, Splunk, Dynatrace, Git
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3mo
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Senior Software Engineer
Boston, Massachusetts, United States
$130k-$150k/yr HybridFull Time
America's Test Kitchen
America's Test Kitchen: Provides tested recipes and reviews for home cooks.
6+ YOE6+ years software development experience; expert in Node.js, React, Python; experience with AWS, containerization, CI/CD, REST APIs, and databases; strong communication and problem-solving.
Node.js, React, Python, Java, AWS, Docker, Kubernetes, CI/CD, RESTful APIs, SQL, NoSQL
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2mo
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Senior Engineer, Software Infrastructure
Wilmington, Massachusetts, United States
$110k-$152k/yr OnsiteFull Time
Analog Devices
Analog DevicesNASDAQ: ADI: Designs and manufactures semiconductors for signal processing and power management.
Experience in web frontend/backEnd, React, TypeScript, Node.js REST APIs, Backstage, Git/GitHub, Docker, cloud (AWS/Azure/GCP), testing (Jest/Playwright/Cypress), CI/CD, SBOMs, Agile software development.
React, TypeScript, JavaScript, Node.js, REST APIs, Backstage, Git, GitHub, Docker, AWS, Azure, GCP, Jest, Playwright, Cypress, CI/CD, SBOMs
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3w
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Senior Software Engineer - Computational Platform
Watertown, Massachusetts, United States
$154k-$200k/yr HybridFull Time
Dyno Therapeutics
Dyno Therapeutics: Designs AI-powered AAV vectors for targeted gene therapy delivery.
6+ YOE6+ years software engineering experience; cloud (GCP/AWS), Terraform, Kubernetes/Docker, data modeling, Python, React/JavaScript, strong engineering best practices and security.
GCP, AWS, Terraform, Kubernetes, Docker, Python, React, JavaScript, SQL, ETL, LLMs
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3w
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Senior Software Engineer
Boston, Massachusetts, United States
$90k-$180k/yr HybridFull Time
Wellington Management: Manages investment portfolios and provides financial research for institutions.
5+ YOE5+ years building production software; proficiency with SDLC tools, Java/Python/TypeScript/Node.js, React/Angular, SQL and relational DBs, AWS, and experience integrating AI-assisted development.
JIRA, Git, Jenkins, GitHub Actions, VS Code, GitHub Copilot, Claude Code, AWS, Java, Python, TypeScript, JavaScript/Node.js, React, Angular, SQL, PostgreSQL, Oracle, MySQL
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1mo
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Senior Software Engineer
Colorado Springs or Boston
$130k-$160k/yr HybridFull Time
Odyssey Systems
Odyssey Systems: Provides technical engineering and program management for government agencies.
5+ YOEUS citizen with active Secret clearance, B.S. in STEM, 5+ years software development with depth in scientific/numerical computing; proficiency in TypeScript/React and a high-performance language; experience with parallelism and CI/CD.
DifferentialEquations.jl, SatelliteToolbox.jl, ONNX.jl, CZML, CesiumJS, Resium, Recharts, Plotly.js, GitHub Actions, PackageCompiler.jl, electron-builder, HTTP.jl, TypeScript, React, Julia, C++, Rust, Fortran, Python, ONNX Runtime
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1mo
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Senior Software Engineer (Fullstack)
New York City or Boston or United States
$185k-$225k/yr HybridFull Time
Counsel
Counsel: Provides AI-powered virtual medical consultations through asynchronous messaging.
5+ YOE5+ years building production software (2+ years at a startup preferred). Proficiency with React, Next.js, Node.js (TypeScript), React Native, Postgres, AWS, Terraform, Redis. Familiarity with AI/ML concepts.
React, Next.js, Node.js, TypeScript, React Native, Postgres, AWS, Terraform, Redis
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Senior Software Engineer
Colorado Springs or Boston
HybridFull Time
Odyssey Systems
Odyssey Systems: Provides engineering, integration, and technical services to defense clients.
5+ YOEUS citizen with active Secret clearance, BS in a STEM field, 5+ years software development experience in scientific/high-performance computing, proficiency with TypeScript/React and Julia or other high-performance languages, parallelism and REST API experience.
TypeScript, React, Julia, C++, Rust, Fortran, Python, NumPy, Numba, Cython, DifferentialEquations.jl, SatelliteToolbox.jl, PackageCompiler.jl, ONNX.jl, ONNX Runtime, CesiumJS, Resium, CZML, Electron, electron-builder, HTTP.jl, GitHub Actions, Recharts, Plotly.js, NSIS, AppImage
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1w
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Senior Software Engineer
New York City or Boston
$172k-$224k/yr HybridFull Time
Click Therapeutics
Click Therapeutics: Develops prescription software to treat medical conditions via smartphones.
10+ YOE10+ years full-stack experience with React Native, TypeScript, Node.js, AWS, Kubernetes; experience designing multi-agent AI workflows, mentoring engineers, and operating CI/CD and observability practices.
React Native, TypeScript, Node.js, AWS, Kubernetes, Datadog, Zoom, Gemini Enterprise Stack, LinkedIn
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