Back End Developer
$40 - $50 per hourMercor
About the job
Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey .
Position: Software Engineer
Type: Contract
Compensation: $40–$50/hour
Role Responsibilities
- Develop MCP servers using Python and FastMCP to enhance the RL Studio platform .
- Integrate web or desktop applications into RL Studio for seamless operation.
- Work with APIs , Docker , and Linux environments to ensure robust service configuration.
- Implement hooks for app state management to maintain app stability and testability.
- Test applications locally and debug build, runtime, and permission issues to meet platform standards.
- Ensure apps comply with platform validation and deployment requirements for production readiness.
Qualifications
Must-Have
- Strong Python skills.
- Experience with APIs , backend systems, and debugging.
- Familiarity with Docker , Linux , and local testing workflows.
- Ability to work with configuration files and deployment pipelines.
- Problem-solving skills and attention to technical detail.
Preferred
- Experience with FastMCP or similar frameworks.
- Experience integrating third-party apps or developer tools.
- Familiarity with web apps, databases, and containerized environments.
Application Process (Takes 20–30 mins to complete)
- Upload resume
- AI interview based on your resume
- Submit form
Resources & Support
- For details about the interview process and platform information, please check:
- For any help or support, reach out to: View email address on jobs.jobcopilot.com
PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.
$60k - $65k per year
...About the Job: The Backend Developer will design, develop, test, deploy, and support scalable backend applications and microservices. This role requires hands-on experience with Java, Spring Boot, REST APIs, relational databases, and cloud technologies. The...SuggestedPermanent employmentFull timeWork at officeLocal area$135k - $154k per year
...proudly offer a video platform, cloud services, advertising solutions, and a non-custodial cryptocurrency wallet. The Senior Back-End Developer is responsible for designing, building, and maintaining high-performance server-side systems that power a large-scale video...SuggestedFull time$65.5k - $99k per year
...online tax research content and solutions to other firms and organizations. As part of the EY E-publishing technology team, the Back-End .Net Developer will help build and support the platforms that make this content accessible, efficient and easy to use. This is an...SuggestedShift workWeekend work- ...Position: Software Developer â Back End Location: Toronto, ON Job ID#: RQ11143 Duration: 16 Months Role Overview We are seeking a Senior Back-End Software Developer to design, build, and maintain scalable, cloud-based applications. This role...SuggestedFull time
$90 - $100 per hour
...Role: Senior Backend Developer Length: 1 year contract (strong potential for extension) Rate: $90-$100/hr INC Location: Downtown Toronto (1 day onsite) Your New Company Join a high-performing digital engineering team within a leading, enterprise-scale organization...SuggestedContract workFlexible hours- ...tested applications. \\\ This includes: developing detailed programming specifications... ...with a track record for meeting deadlines Back End Skills \\\ ~ Knowledge and experience... ..."}],"headerName":"RQ10662 \- Software Developer \- Back End \- Senior","widgetId":"383123000000072311...Long term contractContract work
- ...specifications into working, tested applications. This includes: developing detailed programming specifications writing and/or generating... ...team player with a track record for meeting deadlines Back End Skills: Knowledge and experience with developing all...Full time
- ...online, batch and workstation) to implement the design as signed off in the technical specifications. Interface with the mid-tier developers. Ensure that the appropriate QA technical standards are incorporated into all artefacts and system code. Preparation of test...Contract workInternship
$86.9 - $104.28 per hour
...RQ11329 - Sr. Software Developer - Back End 5+ month contract (108 business days) - possible extension ONSITE 5 days - 222 Jarvis St Must Have: ~10+ years of experience as a designer and developer in the large-scale multi-client web applications ~10+...Contract workManual labor- ...RQ09797 - Sr. Software Developer - Back End Toronto (87 William Hearst Ave.) -required to come to the office 3 days a week 2 Openings Max number of candidate submissions - 2(two) Contract 5 months, possible extension · Analysis leading to detailed information...Full timeContract workInternshipWork at office3 days per week
$86.9 - $104.28 per hour
...RQ11237 - Sr. Software Developer - Back End 10-month contract (202 business days) - possible extension ONSITE 5 days - 222 Jarvis Street Security Level: CRJMC NOTE: Hiring Manager is looking for a strong full-stack developer with API Dev exp. Must Have...Contract work- About Forma.ai: Forma.ai is a Series B startup that's revolutionizing how sales compensation is designed, managed and optimized. We handle billions in annual managed commissions for market leaders like Edmentum, Stryker, and Autodesk. Our growth has been fuelled ...Long term contractFull time
- ...Bounteous is a premier end-to-end digital transformation consultancy dedicated to partnering... ...Responsibilities Configure and support Murex Back Office modules, including settlements, confirmations, and accounting Design, develop, and maintain MxML workflows to support...Full timeLocal areaWorldwideWork visa
- ...and tenants interact and operate. We are developing the next version of our product using cutting... ...developers with expertise in front end development, specifically Angular, who thrive... ...impact for our users. Tasks: Develop and deliver code for new features based on...Full timeFlexible hours
- ...quality web applications focused on performance, scalability, and great user experience. We’re currently looking for a Senior Front-End Developer who is passionate about clean code, attention to detail, and building polished interfaces that align with our existing design...Full time
$120k - $130k per year
...such a workplace intrigues you, we hope you’ll join us. About the role: We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean, testable code...Full timeInternshipWork at officeFlexible hours- ...LotusFlare are replacing traditional business back ends with an engagement-centric, dynamic... ...stack. They are responsible for further developing, securing, and scaling the back-end infrastructure... ...Opportunities: We provide the chance to develop professionally while mastering cutting-...InternshipWork at officeWorldwide
- ...We’re a talented team of product managers, digital marketers, developers, and product designers building Canada’s leading financial product... ...THE ROLE: We are looking for a passionate web developer to join the Ratehub team who will play a central role in the keeping...Full timeCasual workInternshipWork from home
- ...Position: Sr Front End Developer \\\ \\\ Location: Onsite\/Toronto \\\ \\\ Job ID#: RQ00471\\\ \\\ Duration: 6 Months + 6 month extension \\\ \ Position Overview \\\ \\\ We are seeking a highly experienced \\ Senior Front\-End Developer \\\ to design, develop...Contract work
$120k - $130k per year
...such a workplace intrigues you, we hope you’ll join us. About the role: We are looking for an experienced Senior Front-End Software Developer to help us craft scalable, accessible, and ultra-responsive web experiences. In this role, you will write clean, testable code...Full timeInternshipWork at officeFlexible hours$150k - $190k per year
...on building context across Forma’s product domain, data platform, calculation engine, data models, and engineering practices. By the end of your first 30 days, you will have: Set up your development environment and become comfortable navigating the codebase, data...$110k - $180k per year
...something like this, where if we are successful, the technologies we develop will solve some of the world’s most challenging problems, and... ...expand pennylane.ai and other websites using the latest front-end technologies. Collaborate with product, design, and technical...Long term contractFull time- ...RQ09484 - Sr. Software Developer - Front End Downtown, Toronto Hybrid: 3 Days onsite / 2 days remote till Oct 19th. - From October 20, 2025, the candidate is required to work onsite 4 days a week and 1 day from home - From January 5, 2026, the candidate is...Full timeContract workRemote work
- ...bringing #BetterGlobalHealth to patients everyday! Apply today and find plenty of reasons to SMILE! The Intermediate Front End Developer is a technical role that supports in building and maintaining the user-facing aspects of Smile Digital Health’s Clinical Intelligence...Remote jobContract workFlexible hours
$86.9 - $104.28 per hour
...RQ11359 - Software Developer- Front End - Senior 4+ Months Contract (102 Business Days) + Possible extension 5 Days ONSITE - 222 Jarvis Street Must Have: Java – 10+ Oracle 12C or higher – 10+ DB SQL including DB Objects such as Tables, Views, Sequences...Full timeContract workInternship$89.9 - $107.99 per hour
...RQ00665/RQ00666 - Sr. Software Developer- Front End 2 openings - 2 submissions 6-month contract (130 business days) - possible extension 3 days onsite/ 2 days remote (subject to HMs discretion) -Metro Hall 55 John Street Note:Candidates will be asked to do...Full timeContract workRemote work$118k - $152k per year
...Engineering practice in Toronto. In this role, you will help design, develop, and maintain modern applications and APIs that support business-... ...and accessible user interfaces using React and modern front-end technologies, delivering reliable user experiences. Containerize...InternshipImmediate start- Front End Developer Position Overview: We are seeking a talented and experienced Front-End Developer to join our dynamic team. The ideal candidate will have a strong background in developing user interfaces for web and mobile applications using modern frameworks and technologies...
- ...their engineering and data capabilities. Job Description We are looking for an ambitious Jr to Intermediate Fullstack Engineer/Developer. You are passionate about technology but very pragmatic in the application of it to real-world engineering problems. You have...Remote jobLong term contractFull time
$110k - $120k per year
...working, and kind-hearted people out there. The impact you'll make: Reporting to the Product Manager, eCommerce, the Front-End Developer is responsible for supporting the ideation, solutioning and implementation of the Saje website enhancements as well as maintaining...Long term contractFull timeContract workPart timeFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Back End Developer. Be the first to apply!
