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Senior Software Engineer Jobs in Fairfield, CT (NOW HIRING)

KWI

Sr Software Engineer

Melville, NY · On-site

$150K/yr

Sr Software Engineer Department: Engineering Employment Type: Full Time Location: Melville, NY Compensation: $150,000 / year Description The Opportunity Are you ready to shape the future of retail ...

Subway

Sr. Software Engineer Web

Shelton, CT

$119K - $149K/yr

Sr. Software Engineer Web Ready to build whats next with one of the worlds most iconic brands? Why Join Subway? At Subway, we are not standing still. We are building. This is a business focused on ...

Subway

Sr. Engineer, Software - Mobile

Shelton, CT · On-site

$119K - $149K/yr

Sr. Software Engineer (React Native Mobile) Ready to build whats next with one of the worlds most iconic brands? Why Join Subway? At Subway, we are not standing still. We are building. This is a ...

Pho Prime, LLC

Sr. Software Engineer Web

Shelton, CT · On-site

$119 - $149/hr

The Sr. Software Engineer designs, develops, and maintains software solutions that support business and product capabilities. This role contributes to the delivery of reliable, scalable, and ...

KWI

Sr Software Engineer

Melville, NY

$125K - $165K/yr

As a Senior Software Engineer at KWI, you'll play a critical role in redefining how retailers connect with customers, streamline operations, and scale with confidence. This is more than just a coding ...

KWI

Sr Software Engineer

Huntington Station, NY

$130K - $171K/yr

As a Senior Software Engineer at KWI, you'll play a critical role in redefining how retailers connect with customers, streamline operations, and scale with confidence. This is more than just a coding ...

New

NBCUniversal

Sr. Software Engineer

Stamford, CT · On-site

$130K - $172K/yr

As our Senior Software Engineer, you'll join the Content Delivery Engineering team (CDE) within NBCUniversal's Global Video Engineering organization in New York City, USA. Your mission is to get ...

NBCUniversal

Sr. Software Engineer

Stamford, CT · On-site

$130K - $172K/yr

As our Senior Software Engineer, you'll join the Content Delivery Engineering team (CDE) within NBCUniversal's Global Video Engineering organization in New York City, USA. Your mission is to get ...

Parker

Sr Software Engineer

Hauppauge, NY · On-site

$123K - $162K/yr

The Software Engineering team works closely with the Systems and Electronic Hardware Engineering teams to develop, qualify and certify these technologies as products for our customers in aerospace ...

Interactive Brokers

Sr Software Engineer

Greenwich, CT · On-site

$137K - $181K/yr

Creating software applications or systems to meet user needs while considering functionality, reliability, and scalability. * Utilizing Java programming languages to write clean, maintainable, and ...

Interactive Brokers

Sr. Software Engineer

Greenwich, CT · On-site

$137K - $181K/yr

Experience of atleast 3 years in software development in C++, Object Oriented Programming, Networking, STL at educational and/or professional level. * In-depth understanding of OOP, design patterns ...

Interactive Brokers

Sr Software Engineer

Greenwich, CT · On-site

$137K - $181K/yr

We seek a self-driven, self-motivated & self-managed software developer with expertise in Python programming. * An ideal candidate will be able to design/develop solutions based on the requirements ...

Interactive Brokers

Senior Software Engineer

Greenwich, CT · On-site

$110 - $150/hr

We seek a self-driven, self-motivated & self-managed software developer with expertise in Python programming. * An ideal candidate will be able to design/develop solutions based on the requirements ...

Interactive Brokers

Sr Software Engineer

Greenwich, CT · On-site

$137K - $181K/yr

Build software that supports the expansion of IBKR brokerage business into new markets around the ... At least 3 years of Java programming experience. * Python, Perl or similar scripting language ...

Interactive Brokers

Sr Software Engineer

Greenwich, CT · On-site

$100 - $130/hr

All phases of a multi-tier software development cycle (GUIs, databases, mid-tier, batch ... Hands on expertise in server‑side programming in Java/C++ * J2EE experience is a plus What we'd ...

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All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Fairfield, CT

Senior Software Engineer information

See Fairfield, CT salary details

$77K

$146.1K

$195.8K

How much do senior software engineer jobs pay per year?

As of Aug 28, 2026, the average yearly pay for senior software engineer in Fairfield, CT is $146,104.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,900.00 and $164,700.00 per year, depending on experience, location, and employer.

What is a senior software engineer?

A senior software engineer designs, codes, tests, and maintains computer software. While these are your primary responsibilities as a senior software engineer, you may also have supervisory duties. These include overseeing a team of junior software engineers or developers. The senior software engineer title is sometimes used interchangeably with senior developer, and positions for both may share similar job duties and responsibilities. In general, software engineers are distinguished from developers in that software engineers apply engineering principles to software development.

What are the key skills and qualifications needed to thrive as a senior software engineer, and why are they important?

To thrive as a Senior Software Engineer, you need advanced programming skills, deep understanding of software architecture, and several years of experience in software development, often supported by a relevant degree. Familiarity with tools like Git, CI/CD pipelines, cloud platforms, and expertise in technologies such as Java, Python, or JavaScript are typically required. Leadership, problem-solving, and effective communication are crucial soft skills for mentoring teams and collaborating across departments. These skills ensure the delivery of robust, scalable solutions and drive successful project outcomes in complex technical environments.

What are some common challenges senior software engineers face when mentoring junior team members?

Senior Software Engineers often mentor junior colleagues, which can be incredibly rewarding but also presents challenges. Balancing mentorship with project deadlines can be demanding, as it requires strong time management and communication skills. Additionally, adapting explanations to different learning styles and levels of experience can be tricky. However, effective mentorship helps build a stronger team and can lead to enhanced leadership opportunities for the senior engineer.

What is the difference between Senior Software Engineer vs Software Developer?

AspectSenior Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; entry to mid-level experience
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing features, debugging
Industry UsageUsed across tech companies, startups, enterpriseCommon in software firms, startups, freelance work
Search & ComparisonOften compared for experience level, responsibilitiesCompared for entry-level to mid-level roles

The main difference between a Senior Software Engineer and a Software Developer lies in experience, responsibilities, and scope. Senior Software Engineers typically have more experience, lead projects, and mentor others, while Software Developers focus on coding and feature development. Both roles are essential in tech companies, but the Senior Software Engineer position involves higher-level planning and leadership.

What does a senior software engineer do?

A senior software engineer designs, develops, and maintains software applications, often leading projects and mentoring junior team members. They analyze requirements, write code, perform testing, and collaborate with cross-functional teams to ensure quality and efficiency. Proficiency in programming languages, problem-solving skills, and experience with development tools are essential for this role.
More about Senior Software Engineer jobs

What are the most commonly searched types of Software Engineer jobs in Fairfield, CT?

The most popular types of Software Engineer jobs in Fairfield, CT are:

What are popular job titles related to Senior Software Engineer jobs in Fairfield, CT?

For Senior Software Engineer jobs in Fairfield, CT, the most frequently searched job titles are:

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Cities near Fairfield, CT with the most Senior Software Engineer job openings:

Senior Software Engineer jobs near you
Infographic showing various Senior Software Engineer job openings in Fairfield, CT as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $146,104 per year, or $70.2 per hour.

Sr Software Engineer

KWI

Melville, NY • On-site

$150K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 27 days ago

Job description

Sr Software Engineer
Department: Engineering
Employment Type: Full Time
Location: Melville, NY
Compensation: $150,000 / year
Description
The Opportunity
Are you ready to shape the future of retail technology? As a Senior Software Engineer at KWI, you'll play a critical role in redefining how retailers connect with customers, streamline operations, and scale with confidence. This is more than just a coding role - it's a chance to help architect scalable systems, solve complex real-world challenges, and directly impact the success of thousands of retailers. You'll be joining a high-performing, collaborative engineering team that thrives on creativity, agility, and continuous improvement. Whether it's optimizing our backend systems, building seamless integrations, or launching new AI-driven features, your work will influence the way modern retail is done.
The Company
We are a small team with a big vision: to be the premier provider of cloud technology solutions for retailers. KWI offers a complete, unified commerce solution from a single database, specifically designed to help specialty retailers grow their business. Our portfolio of customers includes Pandora, Bluemercury, Tom Ford and many other globally recognizable brands.
We combine Point of Sale, Merchandising, Order Management, eCommerce, CRM, and Loss Prevention into one cloud-based platform. We are a Values and Mission driven organization, and we believe that if we develop and demonstrate leadership in our strategy, operations, and people, we will continue to drive product innovation and service excellence.
As a Sr Software Engineer, you excel at the following core competencies
  • Building partnerships and working collaboratively with others to meet shared objectives
  • Operating effectively, even when things are not certain or the way forward is not clear
  • Takes full ownership over decisions, actions or failures

The impact you'll make
  • Lead the development and implementation of software projects from inception to deployment.
  • Be a creative problem solver who can draw on an array of expertise and technology to design and implement reliable, scalable, and maintainable solutions to challenging problems.
  • Works closely with teams to deliver transformational change to our processes and technologies across multiple teams.
  • Lead the technical specification, development, integration, testing and release of software components
  • Identify and address technical challenges, optimize code for performance, and participate in ongoing code refactoring.
  • Use AI to develop applications and help solve problems.

What you will bring
  • BS Degree in Computer Science/Engineering related degree or equivalent work experience.
  • 6+ Years of production coding experience, demonstratable experience in objected oriented programming.
  • Have some demonstratable experience developing with AI, Claude Code, Agent OS, Spec Driven development.
  • Expertise in Service-oriented architectures, microservices, advanced database schemas, relational and nonrelational databases, highly scalable and available web services.
  • The ability to context shift and manage multiple priorities at the same time.
  • Hands-on experience in building RESTful Web Services.
  • Experienced with microservices.
  • Prior experience using SQL, Hibernate, and one or more DB (MySQL, Oracle, Postgres, etc)
  • Prior experience using NoSQL. (Redis, MongoDB, DynamoDB, etc)
  • Experience with automated testing frameworks (TDD, Mocking, Unit/Functional/Integration)
  • Experience with various version control systems, defining code branching strategies and build processes.
  • Experience with development and CI tools: maven, git, Jenkins, Puppet, Crucible, Jira.
  • Experience working with messaging systems. (RabbitMQ, Kafka)
  • Experience with a variety of different programming/scripting languages.
  • Extensive experience with Agile methodologies such as Kanban, Scrum or SAFE.

As a member of the KWI team you will receive
  • Full Medical, Dental and Vision
  • Annual bonus eligible
  • Free gym in the building
  • Generous PTO policy
  • Summer Fridays....all year round
  • Tuition Reimbursement
  • Discount from building café
  • 401(K) with a 50% company match (up to 6% of employee contribution)
  • Employee Referral Program
  • (1) Volunteer day each year

Our work space
We understand that our teams need flexibility, which is why we follow a hybrid schedule. Our in-office days of Monday, Tuesday and Thursday, and employees are allowed to work remotely on Wednesdays and Friday.
We are also a collaborative group and believe that getting together in person allows our team to do their best work. Together we enjoy monthly events, bagels every Thursday, a state-of-the-art coffee machine, a full snack pantry and many more surprise and delight moments throughout the year.
Our commitment to you
At KWI, we know that cultivating diversity and fostering an inclusive work environment is critical to our impact and success. We create an environment where no individual is advantaged or disadvantaged because of their background. We offer equal opportunity employment regardless of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability status, age, marital status, or protected veteran status.
With a commitment to maintaining a bias-free environment in which harassment is prohibited, we respect cultural diversity and comply with the laws of the places in which we operate. We expect our business partners, suppliers, clients, and all our team members to uphold these commitments.

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