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Freelance Senior Backend Developer Jobs (NOW HIRING)

Rumble - Career Page

Senior Back-End Developer

Miami, FL · On-site

$159K - $176K/yr

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance server-side systems that power a large-scale video platform serving millions of users. This is a senior ...

Hertz

Sr. Backend Developer

Estero, FL · On-site

$120K - $140K/yr

We are seeking a Senior Backend Engineer to design, build, and scale critical rental systems that power core business operations. This role requires strong expertise on backend development, with the ...

1 point system

Sr. Backend .Net Developer

New York, NY · Remote

Our client is looking for a Sr backend .NET engineer with about 8+ years of experience * targeting a strong backend engineer with cloud and data integration experience * Should have experience with

Viasky

NY · On-site

$100 - $130/hr

Chi stiamo cercando Senior Back-end Developer con una consolidata conoscenza del mondo dei microservizi web. Cerchiamo un Back-end Developer con una consolidata conoscenza della programmazione ad ...

New

Scania Nederland B.V.

NY · On-site

$77.26 - $113.32/hr

Role Summary As a Senior Backend Developer, you will play a key role in building and evolving Erinion Connect, our cloud-native Charging Management System (CMS) for smart charging and energy ...

New

Judge Group, Inc.

Back-end Developer - V

Bedminster, NJ · On-site

$122K - $159K/yr

We are seeking a highly skilled Senior Back-end Developer with strong expertise in Java, Microservices, and NoSQL (Cassandra) to join our team. This role involves designing and implementing scalable ...

21TORR Interactive GmbH

$86 - $133/hr

Als unser neuer Senior Backend Developer (m/w/d). Du hast die Möglichkeit, Deinen Fachbereich aktiv mitzugestalten, innovative Ansätze zu entwickeln und Dein Team wachsen zu lassen. Zusammenarbeit ...

New

Surefront

$129K - $168K/yr

We are looking for an experienced Senior Backend Developer to help lead efforts on the back end of our enterprise-grade system. In this role, you will work closely with members of the engineering and ...

Alpha Consulting Corp.

Sr Backend Developer

Addison, TX · On-site

$116K - $151K/yr

Alpha Consulting Corp. is seeking a Sr Backend Developer to join their Enterprise Payments Technology (EPT) team. The role involves developing, enhancing, debugging, and maintaining software ...

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Freelance Senior Backend Developer information

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$64K

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$190.5K

How much do freelance senior backend developer jobs pay per year?

As of Aug 20, 2026, the average yearly pay for freelance senior backend developer in the United States is $139,839.00, according to ZipRecruiter salary data. Most workers in this role earn between $120,500.00 and $156,500.00 per year, depending on experience, location, and employer.

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Freelance Senior Backend Developer jobs near you
Infographic showing various Freelance Senior Backend Developer job openings in the United States as of August 2026, with employment types broken down into 80% Full Time, 3% Part Time, and 17% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $139,839 per year, or $67.2 per hour.

Senior Back-End Developer

Rumble - Career Page

Miami, FL • On-site

$159K - $176K/yr

Full-time

Re-posted 7 days ago

Job description

About RUM Group Inc.
RUM Group Inc. is an AI infrastructure and video company. Its Quake AI business delivers AI compute as a service, operating AI data centers including GPU and CPU compute, storage, and networking at scale. Rumble, RUM Group's video business and the original tenant of Quake AI, provides creators and enterprises a full suite of video technologies, unlocking reach, scale, and monetization. RUM Group is building the rails of the agentic-first enterprise: the AI compute, cloud infrastructure, and trust layer for the agentic AI future, advancing RUM Group's mission to maximize the power of human imagination. For more information visit www.rum.group.
Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance server-side systems that power a large-scale video platform serving millions of users. This is a senior individual contributor role for someone who can own backend systems end to end, improve them in production, and make strong technical decisions as scale, complexity, and performance demands grow.
Our environment centers on backend services, data-intensive application logic, and production systems that must perform reliably at high scale. You should be comfortable working across PHP, MySQL, caching layers, APIs, Linux environments, and legacy systems, while also partnering effectively with front-end engineers to connect user-facing components to server-side logic.
You'll work closely with engineering partners to turn requirements into clear technical plans, apply strong systems design fundamentals to complex backend problems, and make sound implementation decisions across application, data, and infrastructure layers.
Responsibilities
Design and evolve scalable backend systems for a high-traffic video platform, with a focus on performance, maintainability, and long-term reliability. This includes building APIs, optimizing MySQL schemas and queries, implementing effective caching strategies with Memcached and Redis, and supporting background jobs or data-processing workloads that operate at significant scale.
The role also includes maintaining and modernizing legacy code, integrating front-end components with backend logic, and contributing to technical direction through code reviews, reusable patterns, and sound architectural judgment.
Qualifications
  • 8+ years of experience in back-end development, including strong experience building production systems at scale.
  • 10+ years of experience with object-oriented programming languages, including 5+ years working with PHP and modern PHP practices such as PHP 8+.
  • Strong experience with MySQL, including schema design, indexing, and query optimization, along with hands-on experience using caching systems such as Memcached and Redis.
  • In-depth understanding of web development fundamentals, HTTP protocols, and Linux server environments, including reading logs and troubleshooting production issues.
  • Working knowledge of front-end technologies such as JavaScript or TypeScript, HTML, and CSS, along with the willingness to jump into any project when needed.
Preferred Qualifications
  • Experience with video technologies, containers, codecs, or live streaming environments.
  • Experience with NGINX, WebSocket-based communication, BASH scripting, networking fundamentals, or static analysis tools such as PHPStan.
  • Degree in Computer Science, Engineering, or a related field.
  • Experience modernizing legacy PHP applications, working with server-side rendering architectures, or contributing to CI/CD and automated testing practices such as PHPUnit.
Annual Compensation Range
$159,000 - $176,000 USD base + benefits + equity
Note: The salary range listed for this position is a good faith estimate based on experience, qualifications, and internal compensation structure. The actual salary offered varies depending on the candidate's skill level and experience. This posting refers to an active vacancy within the organization.
Why Our Team Loves Working Here:
  • We are making a significant financial impact for our video creator community; we're proud of their success stories
  • We enjoy challenging the status quo and going head-to-head against Big Tech
  • We aren't afraid to try new things; we act fast and want to win
  • We pay competitive salaries and provide great benefits

EEO Statement:
RUM Group Inc. is an equal opportunity employer. We promote an equal playing field where everyone has the same opportunities regardless of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability status, or any other applicable characteristics protected by law. RUM Group Inc. is an active participant in the e-verify program.
Physical demands of the position:
While performing the duties of this job, the employee is regularly required to sit for prolonged periods of time while using a computer and/or keyboard. The employee is required to communicate verbally and hear. The employee may be required to walk, reach with hands and arms, balance, and stoop or kneel. The employee may occasionally be required to lift and/or move up to 15 pounds. Specific vision abilities required by this job include clarity of vision at approximately 20 inches or less (i.e., working with small objects or reading small print), including the use of computers.

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