ZipRecruiter

Log In

1

Full Stack Software Engineer Intern Jobs in Seymour, CT

Ritchie Bros.

Staff Software Engineer

Norwalk, CT · On-site

Role Summary: The Staff Software Engineer will be a high-velocity full-stack builder for the new Product Engineering team, predominantly focused on delivering elite frontend interfaces while ...

Assa Abloy

Full Stack Developer, MarTech

New Haven, CT · On-site

As a Full Stack Developer , you will take ownership of our internal design system - a versioned ... Experience with common software development tools and processes. * Proficiency in Microsoft Office ...

PetVet Care Centers

Full Stack Developer

Westport, CT

$85K - $95K/yr

Position Overview The Full Stack Developer is an entry-level position responsible for supporting ... The ideal candidate is a motivated problem solver with a strong foundation in software development ...

ASSA ABLOY

Full Stack Developer, MarTech

New Haven, CT · Hybrid

As a Full Stack Developer , you will take ownership of our internal design system - a versioned ... Experience with common software development tools and processes. * Proficiency in Microsoft Office ...

next page

Showing results 1-20

All JobsFull Stack Software Engineer Intern JobsFull Stack Software Engineer Intern Jobs in Seymour, CT

Full Stack Software Engineer Intern information

See Seymour, CT salary details

$44.7K

$135.4K

$191.5K

How much do full stack software engineer intern jobs pay per year?

As of Sep 4, 2026, the average yearly pay for full stack software engineer intern in Seymour, CT is $135,446.00, according to ZipRecruiter salary data. Most workers in this role earn between $111,600.00 and $158,800.00 per year, depending on experience, location, and employer.

What does a full stack software engineer intern do?

A Full Stack Software Engineer Intern assists with the development of both the front-end and back-end components of web applications. They work under the guidance of experienced engineers to write code, debug issues, and help integrate different technologies across the software stack. Typical tasks include building user interfaces, connecting to databases, and testing new features. This role helps interns gain hands-on experience with various programming languages, frameworks, and tools commonly used in software development.

What are the key skills and qualifications needed to thrive as a full stack software engineer intern?

To thrive as a Full Stack Software Engineer Intern, you need a solid understanding of programming languages (such as JavaScript, Python, or Java), basic web development concepts, and enrollment in a relevant degree program like computer science. Familiarity with frameworks (like React or Node.js), version control systems (such as Git), and cloud platforms are often expected. Strong problem-solving abilities, eagerness to learn, and effective teamwork set standout interns apart. These skills and qualities enable interns to contribute meaningfully to projects, adapt quickly to new technologies, and collaborate efficiently in dynamic development environments.

What types of projects and technologies do full stack software engineer interns typically work on during their internship?

Full Stack Software Engineer Interns often work on a variety of projects that span both front-end and back-end development. This may include building user interfaces with frameworks like React or Angular, developing APIs using Node.js or Python, and working with databases such as MongoDB or PostgreSQL. Interns usually collaborate closely with senior engineers, designers, and product managers, gaining exposure to the full software development lifecycle. The work environment tends to be fast-paced and collaborative, offering valuable opportunities to learn modern development practices and tools.

What is the difference between Full Stack Software Engineer Intern vs Software Developer Intern?

AspectFull Stack Software Engineer InternSoftware Developer Intern
Required SkillsKnowledge of both front-end and back-end technologies, basic understanding of databasesFocus on specific programming languages or platforms, such as Java, Python, or mobile development
Work EnvironmentCollaborates on full application development, often in agile teamsWorks on specific modules or features, may focus on front-end or back-end
Industry UsageCommon in tech companies, startups, and software firmsWidely used across various tech sectors, including web and mobile app development

In summary, a Full Stack Software Engineer Intern has a broader scope, working on both front-end and back-end development, while a Software Developer Intern may focus on a specific area. Both roles provide valuable experience in software development but differ in technical breadth and project involvement.

Full Stack Software Engineer Intern jobs near you
Infographic showing various Full Stack Software Engineer Intern job openings in Seymour, CT as of August 2026, with employment types broken down into 1% As Needed, 87% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $135,446 per year, or $65.1 per hour.

Founding Software Engineer - AI & Operations (Full-Stack)

United Concrete

Wallingford, CT • On-site

Full-time

Medical, Dental, Retirement, PTO

Re-posted 5 days ago

Job description

The short version
We make precast concrete - the stuff underneath roads, buildings, and utilities across the Northeast. Our plants run on spreadsheets, memory, and paper. We're hiring one engineer to change that, with full ownership of architecture, stack, and roadmap.
You won't inherit legacy code. You won't ship features into a backlog nobody reads. You'll build systems that people 50 feet from your desk use every day - and they'll tell you, immediately and honestly, whether they work.
Why this role is different
  • You choose the stack. Green-field. Data model to UI, it's yours.
  • AI is the job, not a bolt-on. Real problems waiting for it:
    • We recently caught a $6,000 forklift parts invoice that a 5-minute manual price check found for half the cost. We want an OCR + LLM pipeline that catches every one of those automatically.
    • We have 10+ years of sales history and no forecasting. Every busy season, high-demand products stock out. You'll build the model that flags shortfalls before they happen.
    • A heater once ran all winter and nobody noticed until the bill review - years later. You'll build anomaly detection on energy and utility data so that never happens again.
  • Direct P&L impact. Your code will save real money, measurably, within months - not "improve engagement metrics."
  • You'll work across the whole business: production scheduling, dispatch and truck routing (including oversized loads), job cost accounting, predictive maintenance, procurement, and compliance.
What you'll build (first 12-18 months)
  • AI invoice auditing - OCR + LLM pipeline that extracts line items from scanned vendor invoices and checks them against market pricing, with human review where errors are costly
  • Demand forecasting - ML/time-series models on a decade of sales data, cross-referenced with mold inventory, to recommend what to pour next
  • Unified inventory & job costing - one system for raw materials, finished goods, labor hours, and purchases tied to specific jobs
  • Route & load planning - truck routing by weight capacity, trailer selection for over-weight/over-width loads, freight costs flowing into job cost sheets
  • Predictive maintenance - evaluate our existing MaintainX deployment (keep it, replace it, or integrate it - your call), then use maintenance history to flag high-wear parts before they fail
  • Compliance & alerts - fleet registrations, insurance, inspections, and real-time shipping/receiving notifications

Logistics
  • Location: 173 Church Street, Yalesville, CT - onsite with the people you're building for (adjust if hybrid flexibility is approved)
  • Compensation: [$X-$Y base] + [benefits summary] (strongly recommend posting a range - it materially improves reply and apply rates)
  • Process: intro call → technical deep-dive on a system you built → short practical exercise (invoice-extraction design) → meet the plant team → offer. Two weeks, start to finish, if you move fast.

Requirements
  • 3+ years of professional engineering experience, including at least one production system you owned end-to-end (data model → API → UI)
  • Strong full-stack fundamentals: a modern backend language, solid SQL/relational design, and a modern frontend framework - we care more about judgment than any specific stack
  • You've shipped LLM API integrations into production (OpenAI, Anthropic, etc.) - structured, task-specific automation, not chatbot demos
  • You've worked with OCR / document extraction and turned messy scans into clean, queryable data
  • You know when a simple regression beats a fancy model - and when AI doesn't earn its complexity
  • You use AI coding assistants (Claude Code, Copilot) daily and ship faster because of it
  • You genuinely enjoy sitting down with a dispatcher or plant manager, understanding their manual process, and turning it into software they actually adopt
  • You're self-directed and comfortable being the first engineer

Bonus points: manufacturing/logistics/construction software, route optimization or constraint problems, anomaly detection on time-series data, AI-assisted procurement tools.
You're probably not a fit if
  • You want a large engineering org, a defined career ladder, and someone else deciding the architecture
  • You need a product manager between you and your users
  • You're only interested in fully remote work

Benefits
  • Paid Vacation
  • Paid Holidays and Sick Time
  • Company 401K 10% Match
  • Group Medical and Dental

Apply