37 test software engineer jobs at 24 companies in Mastic, NY
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Test Automation Engineer
Greenwich or Chicago
$140k-$160k/yr HybridFull Time
3+ YOEBachelor's in quantitative field,3+ years software engineering,strong Python and unit testing experience (pytest/unittest),git proficiency,testing and QA expertise,excellent communication and analytical skills.
Python, pytest, unittest, git, Manta, Ataccama
1mo
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SDET - Senior Software Developer Engineer in Test (SDET) Controls
Glen Cove, New York, United States
$120k-$150k/yr OnsiteFull Time
4+ YOE4+ years writing production-quality code (Python, C/C++, TypeScript); test automation and CI/CD (Playwright, pytest); hands-on PLC and industrial protocols experience; electrical fundamentals and hardware-in-the-loop testing.
Python, C, C++, TypeScript, Playwright, pytest, Modbus TCP, Modbus RTU, EtherNet/IP, EtherCAT, PROFINET, ROS2, Docker, Allen-Bradley, Siemens, Beckhoff, Structured Text
3w
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Software Engineer I
Grand Rapids or Uniondale or Austin or Atlanta
$100k-$150k/yr HybridFull Time
1+ YOE1+ year software engineering experience; strong skills in Python or JavaScript/TypeScript; familiarity with APIs, integrations, automated testing, debugging; comfortable with AI-assisted development (Claude Code preferred); onsite collaboration required.
Python, JavaScript, TypeScript, Claude Code
2d
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Sr. Software Engineer Web
Shelton, Connecticut, United States
$119k-$149k/yr OnsiteFull Time
6+ YOE6–9 years of professional software engineering experience; JavaScript, Node.js, ReactJS, React Native, REST APIs, databases, version control, testing, and software architecture knowledge. Bachelor's degree or equivalent experience.
JavaScript, Node.js, ReactJS, React Native, REST APIs, CI/CD
1mo
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Software Engineer
Stamford or New York
$105k-$145k/yr HybridFull Time
3+ YOEBachelor's in CS/IT required; 3+ years software development with Go and/or Python; experience with cloud deployment (AWS, GCP), Kubernetes/Docker, CI/CD, test automation, SRE practices, and strong communication skills.
Go, Python, AWS, GCP, Kubernetes, Docker, CI/CD, test automation, Site Reliability Engineering (SRE), scrum, kanban, CDN, AI tooling
4d
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Software Engineer
Hauppauge, New York, United States
RemoteFull Time
3+ YOEBachelor's degree in computer science, computer engineering, or similar field; 3+ years of mixed-environment development; experience with Flutter, Dart, Rust, Python, PostgreSQL, AWS, DevOps, CI/CD, testing, and infrastructure-as-code.
Flutter, Dart, Rust, Python, PostgreSQL, AWS, CI/CD, Microsoft Excel
2mo
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Sr. Software Engineer, Testing
Westport, Connecticut, United States
$350k-$500k/yr HybridFull Time
4+ YOE4+ years in rigorous engineering environments; 2+ years in SDET/testing architecture; strong diagnostic and system design skills; exposure to low-latency, agentic testing.
2mo
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Test Engineer II, Electrical Engineering (PCB Production & Testing) (New Haven, CT, US, 06511)
New Haven, Connecticut, United States
OnsiteFull Time
BS in Electrical Engineering; hardware/software test development; PCB production/testing; embedded systems; project leadership and collaboration.
Arduino, BLE, IEEE-488, RFID, WiFi, C#, Altium, TestStand, Embedded systems, Test automation
1mo
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Sr. Software Engineer (React Native)
Shelton, Connecticut, United States
$119k-$149k/yr OnsiteFull Time
6+ YOE6+ years professional software engineering experience; experience with JavaScript, Node.js, ReactJS, React Native; familiarity with REST APIs, databases, testing, CI/CD, version control, and Agile; bachelor’s degree preferred or equivalent experience.
JavaScript, Node.js, ReactJS, React Native, REST APIs, CI/CD
1w
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Sr. Automation Test Engineer
Wilton, Connecticut, United States
HybridFull Time
9+ YOERequires 9 years testing/development experience, bachelor\u0002s in CS/Electronics or related, proficiency in Python/Java/JavaScript/SQL, UI and REST API automation, TestNG/JUnit/NUnit, Selenium/WebDriver, Git, TestRail, Agile/DevOps/CI-CD experience, Salesforce Admin cert.
Python, Java, JavaScript, SQL, TestNG, JUnit, NUnit, GIT, Selenium, WebDriver, TestRail
1mo
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Middle Office Software Developer
Norwalk or Rowayton
$115k-$200k/yr OnsiteFull Time
5+ YOEBachelor's in computer science, 5+ years software development in financial services, experience with C#, Windows and web frameworks, SQL Server, messaging/SOA/APIs, Agile and unit/integration testing.
C#, Windows Forms, WPF, ASP.NET MVC, Angular, JavaScript, Web API, SQL Server, MOM, SOA, APIs, Agile, Coding agents and AI-assisted development tools
2mo
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Quantum Software Engineer II
New Haven, Connecticut, United States
$103k-$154k/yr HybridFull Time
2+ YOEBachelor's in CS/ECE/math/physics/chemistry required; 2+ years Python software development; experience with debugging/profiling, version control, software testing, and quantum APIs (Qiskit, Q#, CUDA-Q, Cirq).
Python, Qiskit, Q#, CUDA-Q, Cirq
1w
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Backend Software Engineer - Assistant Vice President
Greenwich or New York City
$130k-$170k/yr HybridFull Time
6+ YOEDegree in software engineering,6+ years web application development,experience with Python/Scala/Node.js,knowledge of relational/NoSQL modeling,testing and SSO familiarity.
Scala, Ruby, Node.js, Python, FastAPI, ZIO, Scala Test, ZIO Test, PyTest
1mo
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Global Advisory Testing Engineer
Morrisville or Shelton
HybridFull Time
8+ YOEBachelor's in EE/CE/CS or related, 8+ years manufacturing test engineering experience, expertise in hardware/software integration, troubleshooting system-level issues, automation/scripting, and supporting global manufacturing operations.
3mo
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Verification Engineer, Software (Danbury, CT, US, 06810)
Danbury, Connecticut, United States
$105k-$120k/yr OnsiteFull Time
10+ YOE10+ years in software verification, automated test development, or embedded systems testing; Python and Robot Framework; RESTful testing; Redfish; CI/CD; HVAC/industrial controls experience.
Python, Robot Framework, Redfish, REST APIs, BACnet, Modbus, JIRA, Confluence, codebeamer, MS Office 365
2mo
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Software Engineer AI
Ridgefield, Connecticut, United States
$75k-$181k/yr OnsiteFull Time
Proficiency in Python, LangChain/LangGraph, RAG pipelines, vector DBs, familiarity with major LLM providers, AI evaluation/testing, Git, CI/CD, Docker, and strong communication skills. US work authorization required.
Python, LangChain, LangGraph, OpenAI, Anthropic, Azure OpenAI, AWS Bedrock, LangSmith, Weights & Biases, FAISS, Chroma, Pinecone, Weaviate, Git, Docker, GitHub Copilot, Cursor
2w
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Sr. Software QA Engineer
Shelton, Connecticut, United States
$126k-$130k/yr HybridFull Time
5+ YOEMaster's in computer science or related and 5+ years experience including export/compliance assessment, CAD BOM formats, SAP MRP integration testing, system validation, change control, and Jira-based test traceability.
Altium, SolidWorks, Pro-E, OrCad, MicroStation, SAP MRP, Jira
1mo
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AVP iOS Software Development Engineer III - MySynchrony
Stamford or Chicago or West Chester or Dallas or New York City or Costa Mesa or Charlotte or Alpharetta
$100k-$170k/yr HybridFull Time
4+ YOE4+ years software engineering experience (or HS +6 yrs), strong iOS expertise (Swift/SwiftUI/UIKit), mobile SDK experience, leadership of Agile teams, unit/integration testing, CI/CD familiarity, JSON/REST/XML, mentoring and production support.
SwiftUI, Swift, UIKit, JSON, REST, XML
1mo
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ATE Engineer
Hauppauge, New York, United States
$135k-$140k/yr OnsiteFull Time
10+ YOE10+ years in test system software and hardware development; strong NI PXI and LabVIEW experience; expertise with mixed-signal test, DAQ, FPGAs, communication protocols; US citizen able to handle ITAR; strong troubleshooting and CI/CD skills.
National Instrument PXI, NI PXI, PCI, DAQ, LabView, NI LabVIEW, Test Stand, Phyton, FPGA, JTAG, ICE probes, RS422/RS232, ARINC, AFDX, TCP/IP, Ethernet, UDP, multimeters, spectrum analyzers, oscilloscopes
1mo
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Testing and Automation Engineer
Shelton, Connecticut, United States
$103k-$128k/yr OnsiteFull Time
5+ YOE5+ years in software testing/automation, proficiency with automation frameworks (Selenium, Cypress, Playwright, REST-assured, Postman), ability to write/debug test code (Java, JavaScript/TypeScript, Python, C#), CI/CD and API knowledge, AI-assisted testing experience.
Selenium, Cypress, Playwright, REST-assured, Postman, Azure DevOps, Java, JavaScript, TypeScript, Python, C#
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