110 software systems engineer jobs at 72 companies in Connecticut

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
2d
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Radar Systems/Software Engineer
Trumbull, Connecticut, United States
$105k-$170k/yr OnsiteFull Time
Technology Service Corporation
Technology Service Corporation: Develops advanced sensor systems and engineering solutions for defense.
5+ YOEB.S. in EE/Physics/CompE (M.S. preferred),5+ years radar and M&S experience,proficient in MATLAB,Python,C/C++,CUDA,VHDL,Windows/Linux,ability to obtain DoD Secret clearance,U.S. citizenship required.
MATLAB, Python, C, C++, CUDA, VHDL, Windows, Linux
1mo
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Software Engineer
Illinois or Kentucky or Kansas or Idaho or Washington or Michigan or Florida or California or Texas or Oklahoma or Tennessee or North Carolina or Minnesota or Massachusetts or Indiana or Georgia or Arizona or Missouri or Alabama or Connecticut or District of Columbia or South Carolina or Oregon
$79k-$119k/yr HybridFull Time
Relativity
Relativity: AI-powered platform for legal discovery and data intelligence.
Backend software engineering role; experience with C# or Python; strong distributed systems knowledge; cloud experience preferred.
C#, Python, GitHub Actions, Azure, Kubernetes
3w
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Senior Software Engineer, Ontology & Reasoning Systems (819)
Connecticut or New York
$238k-$267k/yr OnsiteFull Time
Protegrity
Protegrity: Provides data-centric security and tokenization software for enterprises.
5+ YOE5+ years building backend systems; strong foundation in logic, discrete math and graph theory; experience with rule-based reasoning, knowledge graphs, LLM-powered pipelines, and production-grade engineering.
Python, Go, Java, Scala, Rust, LLMs, Datalog, Answer Set Programming, Prolog, SMT solvers, RAG, RDF, SPARQL, Neo4j, OWL, SHACL, CSP, vector search, property graphs
2mo
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Systems Software & Integration Engineer 2026
Hartford, Connecticut, United States
$85k/yr OnsiteFull Time
Connecticut State Colleges & Universities
Connecticut State Colleges & Universities: Public system of colleges and universities in Connecticut.
4+ YOEBachelor's in CS/IS, 4+ years in ERP/system design and support (preferably Ellucian Banner), RDBMS and SQL experience, reporting tools (Argos/Cognos/PowerBI), strong communication and IT literacy.
Ellucian Banner, Oracle, Microsoft SQL, MySQL, Postgres, TOAD, SQL Developer, SQL, PL/SQL, PostgreSQL, Argos, Cognos, PowerBI, Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft Teams, Unix, Linux, HTML5, CSS, Bootstrap, JSON, Java, JavaScript, AngularJS, RESTful Web Services, NodeJS, React.js, Visual Studio, crontab, Automic, ISE (EnterpriseSCHEDULE), Ellucian Experience portal, Ellucian Data Connect, Ellucian Ethos, Intelligent Learning Platform (ILP), Blackboard
3w
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Software Engineer - Integrations
Manchester or Canada or United Kingdom or Alabama or Arizona or California or Colorado or Connecticut or District of Columbia or Florida or Georgia or Iowa or Idaho or Illinois or Indiana or Kansas or Massachusetts or Maryland or Maine or Michigan or Minnesota or Missouri or North Carolina or Nebraska or New Hampshire or New Jersey or New Mexico or New York or Ohio or Oklahoma or Oregon or Pennsylvania or South Carolina or Tennessee or Texas or Utah or Virginia or Vermont or Washington or Wisconsin or West Virginia
£50k-£80k/yr HybridFull Time
Mark43
Mark43: Provides cloud-native records and dispatch software for first responders.
3+ YOE3+ years backend software engineering with distributed systems and integrations; experience designing/operating APIs, webhooks or messaging systems; familiarity with Java, TypeScript/JavaScript, REST, SQL/MySQL; strong communication skills; must be authorized to work in the hiring country.
Java, TypeScript, JavaScript, REST, SQL, MySQL, CI/CD, Claude Code Enterprise
1w
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Staff Software Engineer
United States or Alabama or Arizona or Arkansas or California or Colorado or Connecticut or Florida or Georgia or Hawaii or Idaho or Illinois or Indiana or Iowa or Kansas or Kentucky or Maryland or Massachusetts or Michigan or Minnesota or Missouri or Nevada or New Hampshire or New Jersey or New Mexico or New York or North Carolina or Ohio or Oklahoma or Oregon or Pennsylvania or Rhode Island or South Carolina or Tennessee or Texas or Vermont or Virginia or Washington or Wisconsin
$178k-$223k/yr RemoteFull Time
Fuze Health
Fuze Health: Integrated digital health, home diagnostics, and virtual pharmacy platform.
8+ YOEBachelor's in CS or equivalent, 8+ years software engineering with 3+ years as tech lead/architect, expertise in Ruby on Rails or Python, PostgreSQL, TypeScript/JavaScript, AWS; system design and healthcare compliance experience required.
Ruby on Rails, Python, PostgreSQL, TypeScript, JavaScript, AWS, ECS, RDS, Lambda, VPC, EHR
3w
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Principal Software Engineer
Warsaw or Fridley or Mounds View or Brooklyn Park or Fort Worth or North Haven or Jacksonville or Boston or Lafayette
$153k-$229k/yr HybridFull Time
Medtronic
MedtronicNew York Stock Exchange: MDT: Develops and manufactures medical devices and digital health solutions.
5+ YOEBachelor’s degree + 7+ years software engineering or advanced degree + 5+ years; experience designing and developing scalable systems for manufacturing operations; mentoring, requirements capture, database architecture, CI/CD, and cross-functional collaboration; ability to travel 25%.
Ignition, deviseWISE, Microsoft Azure, AWS, Docker, Kubernetes, Jenkins, Terraform, React, Angular, Node.js, ASP.NET, HTML5, CSS3, WebAPI, Microservices Architecture, CI/CD Pipelines, RESTful API Design, Java, C++, .NET, Scala, Lua, Python, SQL
5d
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Software Integration Engineer
Groton, Connecticut, United States
$90k-$100k/yr OnsiteFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Designs and manufactures defense and mission-critical technology solutions.
1+ YOEBachelor's in software/engineering/math +1 year (or Master's); U.S. citizenship and eligibility for Secret clearance; experience with system integration, virtualization, containers, scripting, networking, and CI/CD tools.
Windows, Linux, Kubernetes, VMware, Hyper-V, Docker, Python, Bash, PowerShell, TCP/IP, DNS, SQL, Git, Jenkins, Ansible
4d
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Staff Software Engineer, Platform
Arkansas or California or Colorado or Connecticut or Florida or Illinois or Louisiana or Massachusetts or Michigan or Minnesota or New Jersey or New York or North Carolina or Ohio or Oregon or Pennsylvania or Tennessee or Texas or Virginia or Washington or Wisconsin
$163k-$185k/yr RemoteFull Time
EasyLlama
EasyLlama: Mobile-first platform for employee compliance and harassment prevention training.
10+ YOE10+ years software engineering experience; expert Ruby on Rails and React; deep Kubernetes, Docker, AWS, CI/CD, distributed systems, API design, and production reliability experience.
Ruby on Rails, React, Kubernetes, Docker, AWS, CI/CD, Terraform, Helm, RabbitMQ, SQS, NATS, Stripe, SQL
1mo
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Senior Java Software Engineer -Aerospace Systems
East Hartford or United States
RemoteFull Time
Sopra Steria
Sopra SteriaEuronext Paris: SOPR: Provides digital transformation consulting and information technology services.
3+ YOE3+ years experience with Java and Python, embedded/real-time systems, knowledge of DO-330 and DO-178C, Git and Linux experience, strong communication, and U.S. citizenship required.
Java, Python, Git, Linux, DO-178C, DO-330
1mo
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Systems Engineer, Embedded Solutions (New Haven, CT, US, 06511)
New Haven or Berlin
OnsiteFull Time
ASSA ABLOY
ASSA ABLOYNasdaq Stockholm: ASSA B: Global manufacturer of locks and automated entrance systems.
Hands-on, broadly skilled systems engineer with cross-domain experience in hardware, firmware, and software; travels to customer sites; strong collaboration and communication.
2w
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Sr. Software Engineer - Real-Time Embedded Systems P3 (Onsite)
East Hartford, Connecticut, United States
$87k-$165k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
5+ YOEU.S. citizenship required. Bachelor's in STEM required. 5 years engineering experience (or 3 with advanced degree). Experience with safety-critical real-time embedded software, C/Ada/assembly, DO-178 and MIL standards, debugging on target hardware.
C, Ada, Assembly, Python, ARINC429, CAN bus, MIL‑STD‑1553, Ethernet, DO‑178, MIL‑HDBK‑516, MIL‑STD‑516, JIRA, Git, emulators, logic analyzers, hardware test benches
3w
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Staff Software Engineer - AI
Hartford or Charlotte
$128k-$191k/yr HybridFull Time
The Hartford
The HartfordNYSE: HIG: Provides business and personal insurance, group benefits, and investments.
Deep AI/ML and software engineering expertise with experience building agentic and generative AI systems; proficiency in Python/Java/C++; cloud and MLOps experience; test automation and Git skills; strong problem-solving and collaboration.
Python, Java, C++, Playwright, MLflow, Kubeflow, Docker, Git, LangGraph, Crew AI, Semantic Kernel, AWS, Azure, GCP, LLMOps, MLOps, Gemini, Claude
2w
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Principal Software Engineer - AI
Woodland Hills or Los Angeles or Alabama or Arizona or California or Colorado or Connecticut or Florida or Georgia or Illinois or Indiana or Kentucky or Massachusetts or Michigan or North Carolina or New Jersey or Nevada or New York or Ohio or Pennsylvania or South Carolina or Texas or Utah or Virginia
$200k-$230k/yr HybridFull Time
Convoso
Convoso: AI-powered contact center platform for outbound sales teams.
10+ YOE10+ years software engineering experience, 5+ years backend work in Python or PHP, expertise building LLM-based AI agent systems, production LLM API integration, MySQL proficiency, and automated testing for AI workflows.
LLM, OpenAI, Claude, GitHub Copilot, MySQL, Python, Django, Flask, PHP, Symfony, Laravel, React
1w
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Senior Software Engineer
Waterford, Connecticut, United States
$110k-$170k/yr OnsiteFull Time
Sonalysts
Sonalysts: Defense engineering, training, and software systems provider.
10+ YOEU.S. citizen eligible for DoD SECRET clearance; bachelor’s degree in computer science or 14 years experience; 10+ years software development; experience with C++, C#, Java and simulation/GUI systems.
C#, Java, C++, .Net, OpenGL, Lua, Qt, Unity, UML, Windows, Linux, DIS
3w
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Software Developer, Backend Ads
San Francisco or Waterloo or New York City or Connecticut or New Jersey or Seattle or Los Angeles or San Diego
$149k-$299k/yr HybridFull Time
TextNow
TextNow: Provides free, ad-supported mobile calling and texting services.
4+ YOE4+ years software engineering experience; strong CS fundamentals; experience with distributed systems, databases, APIs, and cloud infrastructure; proficiency in one or more modern programming languages; strong communication and collaboration skills.
2mo
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Senior Software Engineer, Java - Systems and Scalability Engineering
California or Colorado or Connecticut or Florida or Georgia or Illinois or Kansas or Massachusetts or Maryland or Maine or New Jersey or North Carolina or New York or Oregon or Tennessee or Texas or Virginia or Washington or Austin or Tampa or Chicago
$160k-$220k/yr HybridFull Time
NinjaOne
NinjaOne: Unified IT platform for automated endpoint management and security.
10+ YOEBachelor's degree or equivalent, 10+ years Java development, 4+ years building highly scalable systems, OOP, REST API design, relational DB design, caching/Redis, familiarity with Kotlin, C++, Golang, Postgres, and AWS; strong quality testing practices.
Java, Kotlin, C++, Golang, Postgres, AWS, Jersey, Spring, Redis, Python
1mo
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Senior Software Engineer
United States or New Jersey or New York or Washington or Hawaii or Alaska or Maryland or Connecticut or Rhode Island or Massachusetts or Nevada or Oregon or Arizona or Colorado or Wyoming or Texas or North Dakota or Minnesota or Missouri or Illinois or Wisconsin or Florida or Georgia or Michigan or Ohio or Virginia or Pennsylvania or Delaware or Vermont or New Hampshire or Maine or Utah or Idaho or Montana or New Mexico or South Dakota or Nebraska or Kansas or Oklahoma or Iowa or Arkansas or Louisiana or Mississippi or Alabama or Tennessee or Kentucky or Indiana or South Carolina or North Carolina or West Virginia or California
$94k-$179k/yr RemoteFull Time
Mercury Insurance
Mercury InsuranceNYSE: MCY: Provider of personal and commercial insurance coverage.
5+ YOE1+ MgmtBachelor's in CS or related (or equivalent experience); 5+ years software programming experience; 2+ years with technologies used at Mercury; 1+ year leading teams; proficiency with Java, Spring/Spring Boot, REST, MongoDB, Docker, Kubernetes, cloud and modern distributed system design.
Java, Python, Go, C++, JavaScript, Spring Framework, Spring Boot, REST, gRPC, MongoDB, Claude, ChatGPT, IntelliJ, VS Code, Apache Kafka, Apache NiFi, Amazon SQS, MS MQ, Apache Camel, Docker, Kubernetes, AWS, Google Cloud, Azure
1mo
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Principal Software Development Engineer
Hartford, Connecticut, United States
$144k-$288k/yr HybridFull Time
CVS Health
CVS HealthNYSE: CVS: Provides retail pharmacy, health insurance, and pharmacy benefit management services.
10+ YOE10+ years software engineering experience with .NET/COBOL/Java/Node.js/JavaScript/Angular, DevSecOps and CI/CD expertise, GCP/Azure cloud experience, and experience modernizing enterprise systems.
.NET, COBOL, Java, Node.js, JavaScript, Angular, Generative AI technologies, GCP, Azure, GitHub, Jenkins, GitHub Actions, ArgoCD, Salesforce, Mulesoft, z/OS
2w
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Software Engineer III – IntelliScript (Remote)
Brookfield or New York City or Alaska or California or Connecticut or Illinois or Maryland or Massachusetts or New Jersey or Pennsylvania or Virginia or Washington or District of Columbia
$105k-$199k/yr RemoteFull Time
Milliman
Milliman: Global provider of actuarial and risk management consulting services.
5+ YOE5+ years software engineering experience focused on data pipelines and backend systems; proficiency with C# (.NET), SQL, AWS, microservices, event-driven architectures, CI/CD and DevOps practices; strong problem-solving and mentoring skills.
C# (.NET), SQL, AWS, GitHub workflows, Terraform, CI/CD, DevOps, Agile/SAFe, EHR, FHIR, HL7