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

Mexico

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 is required

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

New

Self Employed Cable Operative

This role falls under the Construction Industry Scheme (CIS). Are you a hands-on...

Location

United Kingdom , Nottingham

Salary:

Not provided

Comex 2000 UK Ltd

Expiration Date

Until further notice

Requirements

Technical Expertise: Sound practical knowledge of XGSPON UG cabling
Safety First: A rigorous focus on Health & Safety and the ability to maintain equipment to safety standards
Teamwork: Comfortable working in teams of up to 5 people
Digital Literacy: Basic IT skills and the ability to use mobile apps for workflow submission and task closure
Credentials: A Full UK Driving License is essential

Job Responsibility

Installation & Maintenance: Heavy cable pulling, subducting, and blowing fibre
Technical Execution: Working within cabinets and performing jointing at both internal and external locations
Project Management: Recording site-specific risk assessments and daily whereabouts via client systems
Quality Control: Adhering to 'Right First Time' quality standards and identifying/staging small blockages
Public Interface: Serving as a professional face of the company, communicating effectively with service providers and end-users

What we offer

We are a company that embraces diversity and is committed to creating an inclusive workplace. We welcome applications from everyone regardless of race, ethnicity, religion, gender, sexual orientation, or disability

Fulltime

New

Nurse Injector

We have an exciting opportunity for an Aesthetic Nurse Injector to join our team...

Location

United Kingdom , London

Salary:

Not provided

Optical Express Group

Expiration Date

Until further notice

Requirements

All applicants must be a qualified Nurse and hold a valid NMC pin number
Aesthetic Trained in Botox and Dermal Fillers ideally from Cosmetic Courses, Harley Academy or Level 7 Aesthetic Medicine or registered on JCCP or the Save Face register
Experience of working in a demanding, time governed environment and confidently seeing x20 patients per week for both Botox and Filler
Passionate about helping people to achieve greater confidence through better skin
Flexible approach with a “can do attitude”
Our peak business hours are evenings and weekends and therefore you should be flexible and willing to be able to work during these hours on a 1-2 week rota

Job Responsibility

Work independently offering expert advice and life changing treatments to your clients
Play a key part in maintaining and improving clinical standards and governance

What we offer

A competitive hourly rate plus bonuses and commission
Free Laser Eye and Intraocular Lens Surgery
Discounts on prescription eyewear and sunglasses
Generous Optical Express family & friends discount
33 days annual leave FTE*
Extensive training in the life changing treatments that we offer
Workplace Pension Scheme

New

Project Delivery Manager

We’re the team behind the UK’s telecom networks—building, upgrading, and keeping...

Location

United Kingdom , Nottingham

Salary:

Not provided

Comex 2000 UK Ltd

Expiration Date

Until further notice

Requirements

Natural Leadership: Proven ability to engage, coach, and manage field-based teams
Organisational Excellence: The ability to juggle multiple priorities and resources without dropping the ball
Technical Savvy: Proficiency in Microsoft Office (Excel, Power BI, PowerPoint) and industry-specific reporting platforms
Problem Solving: A solutions-focused mindset with the ability to make sound decisions under pressure
Telecoms & Civils Expertise: Solid understanding of excavation, duct installation, and reinstatement (HAUC, SROH)
Regulatory Knowledge: Deep familiarity with NRSWA (Signing, Lighting, and Guarding) and SSHEQ requirements
Operational Background: Experience managing subcontractors and internal teams in a KPI-driven environment
Commercial Awareness: Ability to manage project expenditure and drive cost control
Certifications & Training: NRSWA Unit 2 (O1): Signing, Lighting, and Guarding (Operative)
NRSWA Unit 10 (S1): Monitoring Signing, Lighting, and Guarding (Supervisor)

Job Responsibility

Operational Leadership: Lead daily field operations, translating big-picture objectives into actionable plans. You’ll manage resources, equipment, and schedules to meet delivery demands
Project Oversight: Own your assigned projects from start to finish. You’ll track progress against milestones, manage budgets, and ensure first-time client sign-offs
SSHEQ & Compliance: Act as a role model for safety. You’ll ensure all works comply with statutory obligations, NRSWA, and PIA guidelines, proactively managing risks before they become issues
Stakeholder & Client Management: Build "trusted advisor" relationships with clients. You’ll be the point of contact for progress reporting, issue resolution, and professional communication
People Development: Manage and mentor a multi-disciplinary team. You’ll set performance goals, foster a collaborative culture, and lead recruitment and personal development initiatives
Continuous Improvement: Don't just follow the process—improve it. You’ll use data and field insights to reduce rework and boost efficiency

Fulltime

Freelance Senior Software Engineer

Seamless.AI

Location:
Uruguay

Category:
IT - Software Development

Contract Type:
B2B

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
April 02, 2025

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Freelance Senior Software Engineer

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Location:Uruguay

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Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:April 02, 2025

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