CrawlJobs Logo

Freelance Senior Software Engineer

https://seamless.ai/ Logo

Seamless.AI

Location Icon

Location:
Mexico

Category Icon

Job Type Icon

Contract Type:
B2B

Salary Icon

Salary:

Not provided

Job Description:

We are seeking an experienced Freelance Sr. Software Engineer; Independent Contractor to join our team on a remote, contract basis. The ideal candidate will be responsible for leading the technical design and development of software projects working independently from start to finish. This role involves collaborating with other engineers to design, develop, and maintain software applications, ensuring that project deliverables meet agreed-upon specifications and timelines. The Sr. Software Engineer will be expected to have excellent technical and leadership skills, as well as a passion for staying up-to-date with the latest developments in software engineering.

Job Responsibility:

  • Provide technical expertise in the design, development, and maintenance of software products
  • Develop and maintain high-quality software code in alignment with project requirements
  • Ensure that project deliverables are completed on time, within budget, and meet quality expectations
  • Define technical, operational, and security requirements for software projects
  • Collaborate with other teams to establish and maintain best practices for software development
  • Offer technical guidance and recommendations to support engineering teams
  • Conduct code reviews to maintain software quality and adherence to best practices
  • Research and evaluate new technologies to enhance software development processes and efficiencies
  • Work with stakeholders to resolve technical challenges, troubleshoot issues, and implement solutions
  • Contribute to the development and maintenance of technical documentation and system guides
  • Maintain clear and professional communication with project teams, management, and stakeholders while working independently

Requirements:

  • 6+ years of experience in software development
  • 5+ years of experience with modern frontend (React.js) and backend (Node.js, Express.js) JavaScript development
  • Bachelor’s in computer science or related field or equivalent work experience
  • Fluency in both English and Spanish is required

Nice to have:

  • Experience mentoring and coaching software engineers
  • Experience with Agile in a highly collaborative, team-based environment

Additional Information:

Job Posted:
April 02, 2025

Work Type:
Remote work
Job Link Share:
PREMIUM
More languages and countries
+ Unlock 31694 hidden job offers
Languages
English Čeština Deutsch Ελληνικά Español Français +15
Countries
United States United Kingdom India Canada Australia +
See plans
Plans from $2.99 / month

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Freelance Senior Software Engineer

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Contratista Indep...
Location
Location
Colombia
Salary
Salary:
Not provided
https://seamless.ai/ Logo
Seamless.AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience in software development
  • 5+ years of experience with modern frontend (React.js) and backend (Node.js, Express.js) JavaScript development
  • Bachelor’s in computer science or related field or equivalent work experience
  • Fluency in both English and Spanish
  • Expert knowledge of modern frontend technologies such as React, ES6/7 JavaScript, Webpack, HTML, and CSS
  • Expert knowledge of modern back-end development and back-end JavaScript (Node.js, ExpressJS), SQL (Aurora Postgres), and AWS
  • Excellent communication and interpersonal skills
  • Strong problem-solving and analytical skills
  • Experience with software development tools such as GitHub and JIRA
  • Experience with cloud-based development and deployment, such as AWS
Job Responsibility
Job Responsibility
  • Provide technical expertise in the design, development, and maintenance of software products
  • Develop and maintain high-quality software code in alignment with project requirements
  • Ensure that project deliverables are completed on time, within budget, and meet quality expectations
  • Define technical, operational, and security requirements for software projects
  • Collaborate with other teams to establish and maintain best practices for software development
  • Offer technical guidance and recommendations to support engineering teams
  • Conduct code reviews to maintain software quality and adherence to best practices
  • Research and evaluate new technologies to enhance software development processes and efficiencies
  • Work with stakeholders to resolve technical challenges, troubleshoot issues, and implement solutions
  • Contribute to the development and maintenance of technical documentation and system guides
Read More
Arrow Right

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Independent Contr...
Location
Location
Costa Rica
Salary
Salary:
Not provided
https://seamless.ai/ Logo
Seamless.AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience in software development
  • 5+ years of experience with modern frontend (React.js) and backend (Node.js, Express.js) JavaScript development
  • Bachelor’s in computer science or related field or equivalent work experience
  • Fluency in English and Spanish is required
  • Expert knowledge of modern frontend technologies such as React, ES6/7 JavaScript, Webpack, HTML, and CSS
  • Expert knowledge of modern back-end development and back-end JavaScript (Node.js, ExpressJS), SQL (Aurora Postgres), and AWS
  • Excellent communication and interpersonal skills
  • Strong problem-solving and analytical skills, with the ability to identify and address technical issues and challenges
  • Experience with software development tools such as GitHub and JIRA
  • Experience with cloud-based development and deployment, such as AWS
Job Responsibility
Job Responsibility
  • Provide technical expertise in the design, development, and maintenance of software products
  • Develop and maintain high-quality software code in alignment with project requirements
  • Ensure that project deliverables are completed on time, within budget, and meet quality expectations
  • Define technical, operational, and security requirements for software projects
  • Collaborate with other teams to establish and maintain best practices for software development
  • Offer technical guidance and recommendations to support engineering teams
  • Conduct code reviews to maintain software quality and adherence to best practices
  • Research and evaluate new technologies to enhance software development processes and efficiencies
  • Work with stakeholders to resolve technical challenges, troubleshoot issues, and implement solutions
  • Contribute to the development and maintenance of technical documentation and system guides
Read More
Arrow Right

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Independent Contr...
Location
Location
Uruguay
Salary
Salary:
Not provided
https://seamless.ai/ Logo
Seamless.AI
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience in software development
  • 5+ years of experience with modern frontend (React.js) and backend (Node.js, Express.js) JavaScript development
  • Bachelor’s in computer science or related field or equivalent work experience
  • Fluency in both English and Spanish
  • Expert knowledge of modern frontend technologies such as React, ES6/7 JavaScript, Webpack, HTML, and CSS
  • Expert knowledge of modern back-end development and back-end JavaScript (Node.js, ExpressJS), SQL (Aurora Postgres), and AWS
  • Excellent communication and interpersonal skills
  • Strong problem-solving and analytical skills
  • Experience with software development tools such as GitHub and JIRA
  • Experience with cloud-based development and deployment, such as AWS
Job Responsibility
Job Responsibility
  • Provide technical expertise in the design, development, and maintenance of software products
  • Develop and maintain high-quality software code in alignment with project requirements
  • Ensure that project deliverables are completed on time, within budget, and meet quality expectations
  • Define technical, operational, and security requirements for software projects
  • Collaborate with other teams to establish and maintain best practices for software development
  • Offer technical guidance and recommendations to support engineering teams
  • Conduct code reviews to maintain software quality and adherence to best practices
  • Research and evaluate new technologies to enhance software development processes and efficiencies
  • Work with stakeholders to resolve technical challenges, troubleshoot issues, and implement solutions
  • Contribute to the development and maintenance of technical documentation and system guides
Read More
Arrow Right

Senior C++ Engineer - AI Training

As a Senior C++ Engineer, you will work remotely on an hourly paid basis to revi...
Location
Location
Salary
Salary:
20.00 USD / Hour
usebraintrust.com Logo
Braintrust
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s degree or higher in Computer Science, Electrical/Computer Engineering, or a closely related technical field
  • 7+ years of professional experience developing production software in C++ for systems, performance-critical, or large-scale applications
  • Expert-level proficiency in modern C++ (C++11 and later), including templates, move semantics, smart pointers, and the STL
  • Strong background in systems programming concepts such as concurrency, operating systems, low-level performance optimization, and memory management
  • Hands-on experience with C++ build systems, compilers, linkers, debuggers, and profiling or analysis tools
  • Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines
  • Proven experience conducting detailed C++ code reviews and enforcing coding standards for safety, performance, and maintainability
  • Comfort working with version control, CI/CD workflows, and automated testing frameworks in modern C++ projects
Job Responsibility
Job Responsibility
  • Review AI-generated C++ code, systems designs, and technical explanations
  • Generate high-quality reference implementations and step-by-step reasoning for complex engineering problems
  • Assess solutions for accuracy, clarity, safety, and adherence to the prompt
  • Identify errors in logic, memory handling, concurrency, or performance
  • Fact-check technical information
  • Write high-quality explanations and model solutions that demonstrate correct methods
  • Rate and compare multiple AI responses based on correctness and reasoning quality
  • Develop AI Training Content: Create detailed prompts in various topics and responses to guide AI learning, ensuring the models reflect a comprehensive understanding of diverse subjects
  • Optimize AI Performance: Evaluate and rank AI responses to enhance the model's accuracy, fluency, and contextual relevance
  • Ensure Model Integrity: Test AI models for potential inaccuracies or biases, validating their reliability across use cases
What we offer
What we offer
  • Get rewarded with BTRST, Braintrust's cryptotoken, for inviting talent, taking a class—even signing up! Use token rewards to help shape the future of the platform
  • Parttime
Read More
Arrow Right

Freelance Senior User Interface Designer

We are inviting a Freelance Senior UI Designer to join our creative team in crea...
Location
Location
China , Shanghai
Salary
Salary:
Not provided
Mobile Now Group
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • English writing and speaking is mandatory
  • At least 2 years experience working as a UI designer or in a related field
  • Experience defining visual & user interface guidelines and building comprehensive designs for applications or software
  • Experience with production design execution and working with implementation, realizing designs
  • Knowledge of Sketch, Principle, Zeplin, Keynote, After effects, Photoshop, Illustrator, or equivalents
  • Proactive, accountable, and detail oriented
  • Demonstrated ability to critical think, concept, and strategize
  • Multi-disciplinary experience, able-communicator, and organized
Job Responsibility
Job Responsibility
  • Understand the needs of the client and/or project before developing UI and visual foundations
  • Design compelling interfaces that best reflect our clients’ brand image
  • Conduct brand studies, trendscapes, and design synthesis as part of the foundational design process
  • Work in a multi-disciplinary setting, with UX designers, project managers, engineers, and quality analysts
  • Create pictograms, illustrations, and animations as part of user interface designs
  • Present and lead clients through iterative workshops
  • Co-lead the collaborative process with front end engineering on the design-to-dev hand-off
  • Conduct build reviews to ensure that implementation accurately reflects designs
Read More
Arrow Right

Vice President, Design (3D)

We are seeking a Vice President of Design to serve as a senior executive leader ...
Location
Location
United States , New York
Salary
Salary:
250000.00 - 290000.00 USD / Year
cellainc.com Logo
Cella
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 10+ years of design experience within experiential, environmental, or architectural roles, with at least 4 years in a senior leadership position (VP or Director level) at a creative agency or design studio
  • Deep expertise in 3D/spatial design is mandatory
  • advanced proficiency in modeling and rendering software such as SketchUp, Rhino, Vray, or Unreal Engine is required
  • Comprehensive understanding of fabrication processes, materials, and production workflows specifically for large-scale brand experiences and physical builds
  • Exceptional ability to articulate complex creative visions to executive-level stakeholders and persuade clients through evocative storytelling and visuals
  • A robust portfolio demonstrating a high level of innovation and spatial storytelling rather than just traditional 2D graphic design
  • Must be based in one of the agency's primary hubs (Los Angeles, San Francisco, or New York City) and willing to adhere to a hybrid in-office schedule (2 days per week)
Job Responsibility
Job Responsibility
  • Lead the overall vision and execution of the design function, ensuring all outputs across spatial, environmental, and integrated disciplines meet the highest standards of craft
  • Champion the integration of creative technology and future-focused design trends to maintain a competitive edge in the experiential landscape
  • Act as a strategic design consultant for high-profile clients, translating complex business objectives into industry-defining physical and visual solutions
  • Lead and mentor a multidisciplinary team of 10+, fostering a culture of accountability, growth, and creative curiosity
  • Collaborate on hiring strategies to attract top-tier talent and manage an extensive national network of freelance specialists and 3D partners
  • Partner with Production, Strategy, and Account teams to ensure design integrity is maintained from initial sketch through final on-site installation
  • Refine departmental workflows, templates, and software standards (including 3D modeling and rendering platforms) to improve efficiency and output quality
  • Oversee the technical vetting of materials and fabrication processes, ensuring ambitious concepts are delivered on time, on budget, and within structural requirements
  • Direct the design of compelling pitch materials and environmental visualizations to win new business and expand the agency's portfolio
What we offer
What we offer
  • medical
  • prescription
  • dental
  • vision
  • AD&D
  • life insurance offerings
  • short-term disability
  • 401K plan
  • Fulltime
Read More
Arrow Right
New

Senior Lecturer/Associate Professor in Literacy

As a Senior Lecturer / Associate Professor in Literacy, you will play a key role...
Location
Location
Australia , Albury-Wodonga, Bathurst, Port Macquarie, Wagga Wagga
Salary
Salary:
Not provided
csu.edu.au Logo
Charles Sturt University
Expiration Date
June 08, 2026
Flip Icon
Requirements
Requirements
  • A doctoral qualification relevant to literacy or education, with a recognised teaching qualification
  • A strong record of high-quality teaching and student-centred learning
  • An established or emerging research profile aligned to literacy, curriculum or pedagogy
  • The ability to build productive partnerships and contribute to academic leadership
Job Responsibility
Job Responsibility
  • Lead impactful literacy teaching and research
  • Teach across online and on-campus environments
  • Shape future teachers and education practice
  • Contribute to curriculum innovation
  • Build strong relationships with students and partners
  • Provide academic leadership in literacy education
  • Contribute to the School's research profile
  • Supervise higher degree research students
  • Actively engage with professional, community and government stakeholders
  • At Associate Professor level: significant academic leadership, research impact, and contribution to the broader discipline at national/international level
What we offer
What we offer
  • 17% superannuation
  • Fulltime
Read More
Arrow Right
New

Program Manager - Controls and Avionics Solutions

This position is based in Endicott, New York. New York and on-site work will be ...
Location
Location
United States , Endicott
Salary
Salary:
120874.00 - 205486.00 USD / Year
baesystems.com Logo
Baesystems
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s degree in engineering, engineering or manufacturing management, or other discipline
  • Demonstrated ability for building strong customer/ stakeholder relationships
  • Strong communication, negotiation, and presentation skills
  • Ability to interpret data and make data-driven decisions
  • Highly adaptable with strong initiative
  • Demonstrated ability to lead and motivate cross-functional teams
  • Knowledge of the global aviation market and regulatory requirements and/ or military aviation market
Job Responsibility
Job Responsibility
  • Maintaining strong customer relationships and leading a multidisciplinary team to execute complex development programs within schedule and budget
  • Leadership and management oversight of a project team assuring that project’s financials, schedule, and technical objectives are met and that the highest level of customer satisfaction is achieved while meeting all contractual commitments
  • Work effectively and collaboratively with Engineering, Operations, and all Program Office functional leadership to assure deliveries continue to exceed customer commitments and achievement of financial commitments to the company
  • Manages, coordinates, plans, organizes, controls, integrates, and executes projects within the Military Aircraft Systems portfolio
  • Participates in the support of new business and in the development of proposals
What we offer
What we offer
  • Health insurance
  • Dental insurance
  • Vision insurance
  • Health savings accounts
  • 401(k) savings plan
  • Disability coverage
  • Life and accident insurance
  • Employee assistance program
  • Legal plan
  • Discounts on home, auto, and pet insurance
  • Fulltime
Read More
Arrow Right