Freelance Senior Software Engineer Job at Seamless.AI

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Contratista Indep...

Location

Colombia

Salary:

Not provided

Seamless.AI

Expiration Date

Until further notice

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

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

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Independent Contr...

Location

Costa Rica

Salary:

Not provided

Seamless.AI

Expiration Date

Until further notice

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

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

Freelance Senior Software Engineer

We are seeking an experienced Freelance Sr. Software Engineer; Independent Contr...

Location

Uruguay

Salary:

Not provided

Seamless.AI

Expiration Date

Until further notice

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

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

Senior C++ Engineer - AI Training

As a Senior C++ Engineer, you will work remotely on an hourly paid basis to revi...

Location

Salary:

20.00 - 60.00 USD / Hour

Braintrust

Expiration Date

Until further notice

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

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

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

Freelance Senior User Interface Designer

We are inviting a Freelance Senior UI Designer to join our creative team in crea...

Location

China , Shanghai

Salary:

Not provided

Mobile Now Group

Expiration Date

Until further notice

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

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

Hris intern

We are looking for a motivated, curious and enterprising candidate to join us at...

Location

Italy , Agordo

Salary:

Not provided

OPSM

Expiration Date

Until further notice

Requirements

You love challenges and you take your responsibility seriously
Previous experience in HRIS field will be considered a plus
You are interested in the HR world
You have strong facilitation and communication skills, you are able to present information to audiences at all levels of the organization
You have good analytical skills, you are able to understand and tell stories behind processes and data

Job Responsibility

Contribute to planning for future HR system needs and make decisions within the framework of EssilorLuxottica’s Digital Agenda
Evaluate current trends and emerging technologies in HR automated technologies and the capabilities of new products, for all human resources functions and how they may impact existing HR systems
Working with IT, Procurement and end users, drive the selection and development of new products, conversions, upgrades, and enhancements for assigned HR systems
Help the HRIS development and support process to prioritize and execute requests for changes and/or enhancements to HRIS
Collaborate with stakeholders and be able to communicate and report progress all of them
Analyze and review existing business processes, control, procedures and applications to develop innovative solutions that maximize efficiency and usability
Develop information-reporting requirements, specifications and user reporting capabilities to extract data for a wide range of human resources reporting and for executive decision-making
Partner with HR community in the region to define or expand programs and process requirements, translating requirements into optimal utilization of the technology
Collaborate with the different stakeholders to ensure employee experience is developed in the Global HRIS solution and roadmap, to continuously improve the Experience processes
This includes recommending automation and self-service opportunities

New

Sales assistant

We are looking for a salesperson whose main task is to help our customers. A tru...

Location

Switzerland , Geneva

Salary:

Not provided

Inditex

Expiration Date

Until further notice

Requirements

Passionate about fashion
Enjoys teamwork
Enthusiastic, ambitious and flexible
Always up to date on the latest trends
Commercial and customer service oriented
Committed, reliable, completes tasks quickly and efficiently

Job Responsibility

Advise and welcome customers
Guarantee the brand's image
Promote customer loyalty
Know trends, products and their characteristics
Ensure merchandise flow (stocks, deliveries, new arrivals, restocking, etc.)
Maintain order and cleanliness in the store
Manage fitting room procedures

Parttime

New

IT Expert for Data Integration

EU funded project: 'Technical Assistance for Strengthening the Capacity of Minis...

Location

Türkiye , Ankara

Salary:

Not provided

Agrotec Spa

Expiration Date

April 30, 2026

Requirements

Bachelor’s degree or higher in Computer Science, Information Systems, Software Engineering, or a related field
Minimum 5 years of professional experience in data integration, database management, or health information systems
Proven experience in integrating multiple data sources and ensuring interoperability
Experience with database design, APIs, and data exchange protocols
Strong problem-solving and analytical skills
Ability to work with both technical and non-technical stakeholders
Excellent command of English (spoken and written)

Fulltime

Freelance Senior Software Engineer

Seamless.AI

Location:
Mexico

Category:
IT - Software Development

Contract Type:
B2B

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
April 02, 2025

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