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Freelance Senior Software Engineer Jobs (NOW HIRING)

PEMCCO, Inc.

Senior Software Engineer

Washington, DC · On-site

$68.43 - $112.91/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

PEMCCO, Inc.

Senior Software Engineer

Hanahan, SC

$53.35 - $88.03/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

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 ...

PEMCCO, Inc.

Senior Software Engineer

Hanahan, SC · On-site

$53.35 - $88.03/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

PEMCCO

Senior Software Engineer

Washington, DC · On-site

$68.43 - $112.91/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

PEMCCO, Inc.

Senior Software Engineer

Washington, DC

$68.43 - $112.91/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

SWITS DIGITAL Private Limited

Senior Software Engineer

$125K - $165K/yr

Greetings from Smart Work IT Services, We are seeking an experienced Senior Software Engineer to contribute to AI-driven software engineering initiatives by building, evaluating, and improving high ...

PEMCCO

Senior Software Engineer

Hanahan, SC · On-site

$53.35 - $88.03/hr

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

Caselle

Senior Software Engineer

Provo, UT · Remote

$120K - $140K/yr

Senior Software EngineerAre 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 ...

Systek

Senior Software Engineer

Hanover, MD · On-site

$90 - $140K/hr

SENIOR SOFTWARE ENGINEER The company is seeking a Senior Software Engineer to provide SETA support in Hanover, MD. RESPONSIBILITIES * Design, develop and install software solutions. * Build high ...

Pivotal Solutions

Sr. Software Engineer

Little Rock, AR · On-site

$103K - $136K/yr

Continually review performance and collaborate with Sr. Software Engineers to recommend repairs of existing programs to increase operating efficiency or to adapt to new requirements * Document ...

RPMGlobal

Senior Software Engineer

Hanover, MD · On-site

$90 - $140/hr

SENIOR SOFTWARE ENGINEER The company is seeking a Senior Software Engineer to provide SETA support in Hanover, MD. RESPONSIBILITIES * Design, develop and install software solutions. * Build high ...

New

Xoriant Corporation

Sr. Software Engineer - SOC

San Jose, CA · On-site

$143K - $189K/yr

Job Title: Sr. Software Engineer - SOC (318578) Job Location: San Jose, CA (100% remote for now but need to be onsite as soon as campus opens) Duration: 6+ months contract Client: Samsung Description:

Accord Technologies Inc.

Sr Software Engineer

New York, NY · On-site

$134K - $176K/yr

Title: Sr Software Engineer Location: New York city, NY Duration: 6 months Position type: Contract * Software engineering - senior software engineer, they are building out a new vulnerability ...

PEMCCO

Senior Software Engineer

Hanahan, SC · On-site

PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical ...

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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 Aug 7, 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 is a freelance senior software engineer?

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:
What job categories do people searching Freelance Senior Software Engineer jobs look for? The top searched job categories for Freelance Senior Software Engineer jobs are:
Freelance Senior Software Engineer jobs near you
Infographic showing various Freelance Senior Software Engineer job openings in the United States as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $143,292 per year, or $68.9 per hour.

Senior Software Engineer

PEMCCO, Inc.

Washington, DC • On-site

$68.43 - $112.91/hr

Full-time

Medical, Dental, Vision, PTO

Posted 15 days ago

Job description

Pay: $68.43 - $112.91 hourly, depending on experience
Benefits: Medical, Dental, Vision, Paid Time Off, Paid Holidays, Employee Assistance Program, and other company-sponsored benefits
Security Clearance: Ability to obtain and maintain a government security clearance if required
Are you an experienced software engineering professional who enjoys leading development efforts, solving complex technical challenges, and building innovative solutions that support mission success?
PEMCCO is seeking a Senior Software Engineer to provide technical leadership in the design, development, integration, testing, and sustainment of software applications and systems supporting critical government operations. This role is ideal for a senior engineer who thrives in collaborative environments, enjoys mentoring technical teams, and is passionate about delivering secure, scalable, and high-performing software solutions.
This opportunity is a strong fit for candidates with experience in software engineering, software architecture, systems development, application development, cloud computing, DevSecOps, Agile development, artificial intelligence, machine learning, or enterprise application support.
About PEMCCO
PEMCCO supports complex technical and operational programs by providing skilled professionals who help customers achieve mission success. We offer opportunities to work on impactful projects, collaborate with talented teams, and contribute to innovative solutions that support critical government operations.
Job Overview
As a Senior Software Engineer, you will serve as a senior software engineering professional responsible for designing, developing, integrating, testing, implementing, and maintaining mission-critical software applications and systems. You will provide technical leadership, evaluate software solutions, and guide development efforts while collaborating with engineers, analysts, cybersecurity professionals, and stakeholders.
This position offers the opportunity to lead complex software initiatives, influence technical strategy, and contribute to high-impact programs that directly support customer missions.
What You'll Do
  • Lead the design, development, testing, implementation, and maintenance of software applications and systems
  • Analyze user, system, and business requirements and develop software solutions that support operational objectives
  • Develop software architectures, system designs, and technical approaches for complex development efforts
  • Perform coding, debugging, testing, and troubleshooting activities throughout the software development lifecycle
  • Support software integration, verification, validation, and deployment activities
  • Evaluate software performance and recommend enhancements to improve efficiency, reliability, maintainability, and scalability
  • Ensure software solutions comply with applicable standards, security requirements, and industry best practices
  • Participate in code reviews, design reviews, and technical assessments
  • Develop and maintain software documentation, technical specifications, and engineering artifacts
  • Coordinate with engineers, system administrators, analysts, cybersecurity personnel, and stakeholders to support project objectives
  • Support configuration management, version control, and software release activities
  • Analyze and resolve complex software defects and technical issues
  • Research and evaluate emerging technologies and development methodologies
  • Provide technical guidance and mentorship to junior software engineers and developers

What You Bring
Required Qualifications
  • Master's degree in Computer Science, Software Engineering, Computer Engineering, Information Systems, Information Technology, Mathematics, or a related technical discipline
  • Ten (10) years of experience in software engineering, software development, application development, systems development, or a related technical field
  • Advanced knowledge of software engineering principles, practices, and methodologies
  • Knowledge of software development lifecycle processes and industry best practices
  • Knowledge of software architecture, design patterns, and application integration concepts
  • Knowledge of software testing, quality assurance, and debugging techniques
  • Ability to analyze complex technical requirements and develop effective software solutions
  • Ability to troubleshoot and resolve complex software defects and performance issues
  • Strong analytical, organizational, and problem-solving skills
  • Ability to communicate technical information effectively to technical and non-technical audiences
  • Ability to lead technical efforts and collaborate across multidisciplinary teams
  • Ability to develop, review, and maintain technical documentation and software artifacts
  • Ability to obtain and maintain a government security clearance if required

Preferred Experience
  • Advanced coursework or specialized training in software engineering, cloud computing, cybersecurity, artificial intelligence, machine learning, or related disciplines
  • Experience supporting Department of Defense or Federal Government programs
  • Experience leading software development efforts or technical teams
  • Experience working within Agile, Scrum, DevSecOps, or similar development environments
  • Experience developing enterprise, distributed, or mission-critical applications
  • Experience supporting software integration, testing, and deployment activities
  • Experience mentoring software development personnel

Why Join PEMCCO?
  • Support critical government and customer missions through innovative software solutions
  • Lead technical initiatives that directly impact operational success
  • Collaborate with experienced engineers, developers, and technology professionals
  • Help shape software architecture, development practices, and technical strategy
  • Expand your expertise across modern software engineering frameworks and technologies
  • Mentor the next generation of engineering talent
  • Build a rewarding career in a collaborative and mission-focused environment

Work Environment
  • Professional office and technical work environments
  • Work may be performed at company facilities, customer locations, or designated project sites as needed
  • Regular use of computers, development platforms, and collaboration tools
  • Frequent interaction with engineers, developers, analysts, customers, and stakeholders

Benefits
  • Medical Insurance
  • Dental Insurance
  • Vision Insurance
  • Paid Time Off
  • Paid Holidays
  • Employee Assistance Program
  • Additional company-sponsored benefits

Apply Today
If you're an experienced software engineer looking to lead innovative development efforts, solve complex technical challenges, and support mission-critical operations, we encourage you to apply.
Join PEMCCO and help build the software systems and applications that power mission success.
Equal Opportunity Employer
PEMCCO, Inc. is an equal opportunity employer. The Company does not discriminate on the basis of race, color, sex, sexual orientation, gender identity or expression, religion, national origin, age, disability, genetic information, military or veteran status, pregnancy, childbirth and related medical conditions, or any other characteristic protected by applicable federal, state, or local law.

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