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Freelance Senior Software Engineer Jobs (NOW HIRING)

ETAP Software

Senior Software Engineer

Irvine, CA · On-site

$129K - $171K/yr

They are seeking a Senior Software Engineer to maintain and enhance software that supports state estimation and virtual metering for complex electrical networks, as well as develop REST APIs and ...

Piper Companies

Sr. Software Engineer

Morrisville, NC · Hybrid

$115K - $125K/yr

Piper Companies is hiring a Senior Software Engineer for a top-tier healthcare technology organization based in Morrisville, NC . This role is ideal for a seasoned engineer with deep expertise in

TAP Engineering

Senior Software Engineer

Washington, DC · On-site

$170K - $230K/yr

Senior Software Engineer Location: Washington, DC Category: Software Engineering Schedule: Standard Day Shift, Monday-Friday Clearance Requirement: Active Secret security clearance (required ...

DLS Engineering

Senior Software Engineer

Saint Louis, MO · On-site

$118K - $126K/yr

Senior Software Engineer at DLS Engineering (on-site) DLS Engineering is seeking a Senior Software Engineer for a full-time position supporting a geospatial customer in St. Louis, Missouri. This is ...

Caselle

Senior Software Engineer

Provo, UT · On-site +1

$120K - $140K/yr

Senior Software Engineer Are you a Software Engineer who's ready to take your career to the next level in an environment where innovation, collaboration, and impact drive everything we do? Join our ...

Caselle

Senior Software Engineer

Provo, UT · On-site

$120K - $140K/yr

Senior Software Engineer Are you a Software Engineer who's ready to take your career to the next level in an environment where innovation, collaboration, and impact drive everything we do? Join our ...

Gridpoint

Senior Software Engineer

Reston, VA · On-site

$127K - $168K/yr

The Senior Software Engineer shall perform with a high degree of independence and expertise to implement solutions for a variety of complex software products/features... both wholly new efforts and ...

ProKatchers

Senior Software Engineer

West Bradford, PA · On-site

$102K - $135K/yr

Senior Software Engineer Location : Downingtown, PA 19335 Duration : 12 Months Shift Details : 100% onsite Job Requirements: Senior Software Engineer, AI Integration * Design and develop AI ...

EPS Corporation

Senior Software Engineer

Panama City, FL · On-site

$109K - $144K/yr

Job Title Senior Software Engineer Location Panama City, FL 32401 US (Primary) US Job Type Full-time Education Bachelor's Degree Career Level Experienced (Non-Manager) Category Information Technology ...

ProKatchers

Senior Software Engineer

Downingtown, PA

$127K - $167K/yr

Senior Software Engineer Location : Downingtown, PA 19335 Duration : 12 Months Shift Details : 100% onsite Senior Software Engineer, AI Integration Design and develop AI integrations for a scientific ...

Caselle

Senior Software Engineer

Provo, UT · Remote

$120K - $140K/yr

Senior Software Engineer Are you a Software Engineer who's ready to take your career to the next level in an environment where innovation, collaboration, and impact drive everything we do? Join our ...

RIT Solutions, Inc.

Senior software engineer

Atlanta, GA · Remote

$117K - $155K/yr

Title-Senior software engineer Remote seeking a Senior Software Engineer with strong backend expertise in Java, Spring Boot, SQL, .NET 10 and real-time data streaming using Apache Kafka. This role ...

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Freelance Senior Software Engineer information

See salary details

$75.5K

$143.3K

$192K

How much do freelance senior software engineer jobs pay per year?

As of Jun 16, 2026, the average yearly pay for freelance senior software engineer in the United States is $143,292.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,500.00 and $161,500.00 per year, depending on experience, location, and employer.

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

AspectFreelance Senior Software EngineerFreelance Software Developer
Experience LevelTypically 5+ years, with leadership and architecture skillsVaries from entry-level to mid-level, focused on coding and implementation
ResponsibilitiesDesigning systems, leading projects, mentoringWriting code, developing features, fixing bugs
CredentialsStrong portfolio, possibly certifications like AWS, ScrumPortfolio, coding skills, possibly certifications
Work EnvironmentRemote or client-site, often in tech companies or startupsRemote or client-site, in various industries

Freelance Senior Software Engineers typically have more experience, leadership responsibilities, and focus on system design, while Freelance Software Developers concentrate on coding and feature development. Both roles are in high demand in the freelance market, but the senior role often commands higher rates due to expertise and project scope.

What are some common challenges faced by Freelance Senior Software Engineers when managing multiple client projects simultaneously?

Freelance Senior Software Engineers often juggle multiple projects for different clients, which can present challenges such as balancing competing deadlines, adapting to varying coding standards, and maintaining clear communication across diverse teams. Time management and setting realistic expectations are crucial to ensure high-quality deliverables. Additionally, staying up to date with new technologies and industry best practices helps maintain a competitive edge and satisfy client requirements.

What are the key skills and qualifications needed to thrive as a Freelance Senior Software Engineer, and why are they important?

To thrive as a Freelance Senior Software Engineer, you need advanced programming expertise, strong problem-solving skills, and a proven track record in software development, often backed by a relevant degree and years of experience. Familiarity with version control systems like Git, cloud platforms such as AWS or Azure, and mastery of frameworks and languages (e.g., JavaScript, Python, Java) are crucial, along with certifications like AWS Certified Solutions Architect or Microsoft Certified: Azure Developer Associate. Outstanding communication, time management, and self-motivation are vital soft skills for independently managing projects and collaborating with diverse clients. These competencies ensure you can deliver high-quality, scalable solutions while building strong client relationships and managing multiple projects efficiently.

What are Freelance Senior Software Engineers?

Freelance Senior Software Engineers are highly experienced software professionals who work independently rather than as full-time employees of a single company. They take on contract-based projects for various clients, often leading development teams, architecting systems, and solving complex technical problems. Their responsibilities typically include coding, reviewing code, mentoring junior engineers, and ensuring that software solutions meet client requirements. Freelance senior engineers offer flexibility and specialized expertise, making them a valuable asset for businesses needing advanced software solutions without long-term commitments.
More about Freelance Senior Software Engineer jobs
What cities are hiring for Freelance Senior Software Engineer jobs? Cities with the most Freelance Senior Software Engineer job openings:
What are the most commonly searched types of Senior Software Engineer jobs? The most popular types of Senior Software Engineer jobs are:
What states have the most Freelance Senior Software Engineer jobs? States with the most job openings for Freelance Senior Software Engineer jobs include:
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Freelance Senior Software Engineer jobs near you
Infographic showing various Freelance Senior Software Engineer job openings in the United States as of June 2026, with employment types broken down into 50% Full Time, and 50% Part Time. Highlights an 100% Remote job distribution, with an average salary of $143,292 per year, or $68.9 per hour.

Senior Software Engineer

ETAP Software

Irvine, CA • On-site

$129K - $171K/yr

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

Job Summary:
ETAP Software empowers customers to make informed decisions throughout the life cycle of their projects with innovative software solutions for electrical systems. They are seeking a Senior Software Engineer to maintain and enhance software that supports state estimation and virtual metering for complex electrical networks, as well as develop REST APIs and collaborate with real-time software engineers.
Responsibilities:
• Implement and maintain system engines used for electrical state estimation.
• Design, develop, and maintain REST APIs for internal applications and services.
• Collaborate with real‑time software engineers to support and improve existing web applications.
• Develop REST APIs for cloud‑based companion applications.
• Ensure all software components meet cybersecurity and compliance requirements.
Qualifications:
Required:
• Bachelor of Science in Computer Science, Computer Engineering, or related field
• 5+ years of professional software development experience
• Experience using Microsoft Visual Studio
• Proficiency in: FORTRAN, C++, C#
Preferred:
• Experience developing software for electrical systems
• Strong understanding of linear algebra
Company:
Optimize, simulate, and control electrical systems with confidence across utilities, infrastructure, manufacturing, and building sectors. Founded in 1986, the company is headquartered in Irvine, USA, with a team of 1001-5000 employees. The company is currently Late Stage.

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