Freelance Senior Full Stack Developer Jobs

New

Freelance Tech Lead

Freelance Tech Lead for an International Life Sciences Innovation client. The pr...

Location

Spain , Barcelona

Salary:

Not provided

Blu Selection

Expiration Date

Until further notice

Requirements

Proven experience as a Tech Lead, Lead Engineer, or Senior Full-Stack Developer
Strong understanding of modern web architectures, cloud platforms, and API integrations
Experience leading cross-functional engineering teams
Solid understanding of Agile methodologies and iterative delivery
Ability to make architectural decisions and communicate them clearly
Excellent communication and leadership skills
Fluency in English (French is a plus)
Availability to work onsite in Barcelona 3 days/week

Job Responsibility

Define the technical architecture, frameworks, and tools for the platform
Ensure strong scalability, performance, security, and reliability
Evaluate technical options and make strategic recommendations
Oversee and guide the engineering team throughout the development cycle
Ensure timely delivery of Version 1 in alignment with the March deadline
Review code, ensure development best practices, and maintain high-quality standards
Coordinate integrations with internal systems, APIs, and data flows
Work closely with the Product Owner, UX Designers, and Researchers to align technical decisions with user and business needs
Translate product requirements into clear technical specifications
Identify risks, dependencies, and propose mitigation plans

What we offer

Lead the technical delivery of a high-visibility digital platform
Work with a multi-disciplinary international team
Contribute to innovation in the life sciences sector
Freelance contract with a Daily Rate of 675€

New

Senior Machine Learning Engineer

Rovo Chat is Atlassian’s flagship product, driving the next generation of user e...

Location

United States

Salary:

168300.00 - 264375.00 USD / Year

Atlassian

Expiration Date

Until further notice

Requirements

Bachelor's or Master's degree (preferably a Computer Science degree or equivalent experience)
5+ years of related industry experience in the machine learning domain
Expertise in Python or Java with and the ability to write performant production-quality code, familiarity with SQL, knowledge of Spark and cloud data environments (e.g. AWS, Databricks)
Experience building and scaling machine learning models in business applications using large amounts of data
Ability to communicate and explain machine learning concepts to diverse audiences, craft a compelling story
Focus on business practicality and the 80/20 rule
very high bar for output quality, but recognize the business benefit of "having something now" vs "perfection sometime in the future"
Agile development mindset, appreciating the benefit of constant iteration and improvement

What we offer

health and wellbeing resources
paid volunteer days

Fulltime

New

HR Plant Manager

Randstad Romania is looking for an experienced professional for the role of HR P...

Location

Romania , Buchin

Salary:

Not provided

Randstad

Expiration Date

January 25, 2026

Requirements

Minimum 5 years of experience in a similar management/coordination HR position, preferably in the Manufacturing industry
Bachelor's Degree preferably in Human Resources, Law, Psychology, or a related field
Must be Certified as an HR Inspector (or equivalent HR qualification)
Advanced level of English (written and spoken) – Mandatory
Solid expertise in Human Resources and labor legislation
Ability to work in a team and excellent organizational skills
Negotiation skills, social sensitivity, and conflict management abilities
Ability to make quick decisions and act with responsibility
Proficient knowledge of MS Office

Job Responsibility

Oversee and coordinate all daily HR Department operations, including recruitment, training, performance appraisals, employee relations, career administration, and personnel cost control
Manage the full lifecycle of employee documentation, including drafting, renewing, and updating the Internal Regulations and individual employment contracts (CIM)
Hold direct responsibility for the accurate Payroll process and support the precision of Timekeeping
Ensure and enforce strict adherence to all national and regional labor law and regulations governing employment relations
Manage, negotiate, and resolve conflicts, fostering positive and constructive interpersonal relations throughout the factory
Represent the company and maintain strong collaboration with public institutions (ITM, AJOFM, Health/Pension Houses, etc.)
Implement and uphold all company procedures, ensuring full compliance with the BRC standard and internal protocols
Supervise and enforce adherence to rules regarding Health, Safety at Work (HSE/SSM), Fire Safety (PSI), and Environmental protection

What we offer

A leadership and coordination role within the HR department at the factory level
The opportunity to work in a dynamic and stable manufacturing environment, reporting directly to local and Group Management
A personalized and competitive salary package, correlated with the solid experience required and the responsibilities of the position
Continuous professional development through participation in specialized training and instructional courses
Direct responsibility for the HR Budget

Fulltime

New

Specialist, Ordering Sales Operations Hub

Specialist, Ordering Sales Operations HUB (f/m/x). The BMW Group is developing r...

Location

Austria , Salzburg

Salary:

Not provided

BMW

Expiration Date

Until further notice

Requirements

Degree in business administration, logistics or comparable fields of science with initial professional experience in the automotive industry in an operational sales role (or comparable)
Alternatively, completed vocational training and at least 5 years of professional experience in an operational sales role
Experience with the BMW Group ordering Systems (e.g. IVS-R
DVP…) represents a plus
Confidence to handle and communicate with various Interface partners, e.g. with specialist departments, central functions and 3rd party providers
Good organizational and planning skills
Personal initiative and 100% reliability
Team spirit and intercultural skills
Fluent in business English

Job Responsibility

Ensuring the production pipeline fill by ordering stock vehicles, both for central compounds as well as regional compounds based on recommended configurations (ConRecOrd Templates)
Constantly monitoring the order/production pipeline and in case of disturbances managing the incident by identifying & evaluating the problem, deriving measures and coordinating the communication with the relevant process partners
Regular exchange with the relevant central interfaces and market based sales functions
Central contact for dealer queries that could not be answered and clarified by First Level Support
Identifying new system requirements and taking responsibility to forward process and system adjustments to the respective business process owner
Participation in setting up the ordering team and all associated activities during the initial setup phase of the new BMW/MINI sales model

What we offer

New flexible working environment at the Campus Salzburg with a wide range of possibilities for working (e.g. mobile work, creative spaces, library or directly in the department)
Flexible working hours without core hours
Opportunity to experience a variety of our products and test them on the road yourself
Canteen offers a selection of various discounted meals every day
Locally and regionally, great discounts through partnerships with various companies (e.g. gym, metro)
Generous parking facilities directly on the Campus Salzburg
Internal initiatives with various events (e.g. initiatives on Sustainability, Health- and Work Environment & Sport)
Attractive salary and benefits package

Fulltime

New

Senior Engineering Manager, AI

As a Senior Engineering Manager (Forward Deployed Engineering team) at Atlassian...

Location

Salary:

Not provided

Atlassian

Expiration Date

Until further notice

Requirements

Bachelor’s or Master’s degree in Computer Science, Engineering, Data Science, or a related field
5+ years of experience managing software engineering teams at scale
Experience delivering impactful AI/ML solutions in production environments, including experience as a founding or forward-deployed engineer in 0-to-1 product development
Deep expertise in applied AI/ML, including generative AI, LLMs, and agent-based frameworks
Proficiency in Python, JavaScript, or similar languages, and experience with APIs, microservices, and enterprise integration
Demonstrated ability to solve complex, ambiguous problems and thrive in rapidly changing environments
Strong communication and collaboration skills, with experience influencing cross-functional teams without formal authority
Experience with AI risk assessment, data privacy, and compliance (e.g., GDPR)
Strategic and innovative thinking, with a track record of aligning technical solutions to business goals

Job Responsibility

Hire, onboard, and retain top talent for your team and foster a culture of innovation, collaboration, and excellence
Mentor and coach your forward-deployed engineering team on best practices in AI/ML solution design, code quality, scalable architecture, testing, debugging, and documentation—ensuring rapid, high-quality delivery of customer-focused, production-ready solutions
Drive data-driven solution development by analyzing complex datasets to extract insights and inform product direction
Champion the adoption of AI-augmented workflow automation within customer environments, maximizing business value and operational efficiency
Oversee the end-to-end deployment of AI solutions into production, ensuring continuous evaluation, monitoring, and improvement
Navigate risk and compliance requirements, including AI risk assessment, data privacy (GDPR), and regulatory frameworks
Communicate complex technical concepts clearly to both technical and non-technical stakeholders, creating concise artifacts for peers, partners, and leadership
Align technical solutions with business objectives, setting a clear vision for technological progress and measurable results

What we offer

Health coverage
Paid volunteer days
Wellness resources

New

Hrbp

Location

Japan , Tokyo

Salary:

8000000.00 - 11000000.00 JPY / Year

Randstad

Expiration Date

November 25, 2026

Requirements

Undergraduate Degree/ Diploma in Human Resources/ Personnel Management/Psychology or related filed.
Minimum of 5 years related experience with proven track record in area of Employee engagement, Industrial relations, OD practices and talent development.
Solid experience in manufacturing organize is preferred.
Understanding of HR related laws, Policies and procedures.
Good verbal and written communication skills both Japanese and English
Strong Interpersonal, negotiation and customer service skills are required.
Ability to establish a rapport with others.
Problem-solving skills
Ability to handle sensitive and confidential issues with tact and diplomacy.
Computer literate in Microsoft Word, Excel and Power Point

Job Responsibility

Talent Acquisition: Manage full recruitment cycle, agency relations, and selection processes.
Talent Development: Drive performance management and coordinate L&D/training programs.
Employee Engagement: Facilitate engagement surveys, focus groups, and action planning.
Employee Relations: Provide guidance on contracts, grievances, and disciplinary matters.
HR Administration & Compliance: Maintain HR records/systems, report, and ensure SOX/Statutory compliance.
Total Rewards Support: Assist with job evaluation and salary structure initiatives.

What we offer

健康保険
厚生年金保険
雇用保険
土曜日
日曜日
祝日
賞与 10%

Fulltime

New

Programs & Market Insight Intern

The Programs and Product Intern is responsible for assisting the Programs Manage...

Location

Canada , Richmond Hill

Salary:

Not provided

BMW

Expiration Date

Until further notice

Requirements

Bachelors Degree in Business
Understanding of the financial and risk impacts of sales programs and pricing
Advanced Microsoft Excel and PowerPoint skills
Working Knowledge of Tableau is a plus
Excellent analytical, and organizational skills
Self-motivated, results-driven and strong attention to detail
Quick learner and ability to work in a fast-paced team environment
Prior experience in the automotive industry is an asset

Job Responsibility

Provide analysis on effectiveness of monthly programs and ensure a smooth implementation including costing for program impulses
Support month-end activities such as program preparations and reconciliations
Monitor the effectiveness of programs and incentive schemes
Collaborate with Controlling Team to ensure program costs are fully aligned and reconciled
Provide regular and ad-hoc analyses and support services related to programs
Conduct Market research for programs, in market offers, in market technologies etc (competition benchmarking)
Complete monthly reporting to various internal stakeholders
Explore and propose innovative approaches to automate processes
Support adhoc Insurance business activities
Support the Senior Specialist with program preparation related tasks

What we offer

An award-winning culture
Cutting edge innovation and creativity
Flexible working models
World-class office space
Fresh & nutritious meals in our amazing fully staffed, and subsidized, onsite cafeteria
Fully stocked coffee/tea bar

Fulltime

New

Principal Forward Deployed Engineer, AI

As a Principal Forward Deployed Engineer (FDE) at Atlassian, you’ll be at the fo...

Location

Salary:

Not provided

Atlassian

Expiration Date

Until further notice

Requirements

Bachelor’s or Master’s degree in Computer Science, Engineering, Data Science, or a related field
10+ years of experience in backend software development
5+ years of experience delivering impactful AI/ML solutions in production environments, including experience as a founding or forward-deployed engineer in 0-to-1 product development
Deep expertise in applied AI/ML, including generative AI, LLMs, and agent-based frameworks
Proficiency in Python, JavaScript, or similar languages, and experience with APIs, microservices, and enterprise integration
Demonstrated ability to solve complex, ambiguous problems and thrive in rapidly changing environments
Strong communication and collaboration skills, with experience influencing cross-functional teams without formal authority
Experience with AI risk assessment, data privacy, and compliance (e.g., GDPR)
Strategic and innovative thinking, with a track record of aligning technical solutions to business goals

Job Responsibility

Lead the design, development, and deployment of AI/ML-powered solutions tailored to customer needs, leveraging frameworks such as TensorFlow, PyTorch, and agent-based platforms (e.g., LangChain, LlamaIndex)
Architect and implement robust application integrations using Python, JavaScript, or similar languages, with a focus on APIs, microservices, and enterprise-scale systems
Drive data-driven solution development by analyzing complex datasets to extract insights and inform product direction
Champion the adoption of AI-augmented workflow automation within customer environments, maximizing business value and operational efficiency
Oversee the end-to-end deployment of AI solutions into production, ensuring continuous evaluation, monitoring, and improvement
Navigate risk and compliance requirements, including AI risk assessment, data privacy (GDPR), and regulatory frameworks
Mentor and guide junior engineers, fostering a culture of innovation, collaboration, and continuous learning
Communicate complex technical concepts clearly to both technical and non-technical stakeholders, creating concise artifacts for peers, partners, and leadership
Align technical solutions with business objectives, setting a clear vision for technological progress and measurable results

What we offer

Health and wellbeing resources
Paid volunteer days

Freelance Senior Full Stack Developer

Blu Selection

Location:
Spain , Barcelona

Category:
IT - Software Development

Contract Type:
B2B

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
December 27, 2025

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

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Freelance Senior Full Stack Developer

Blu Selection

Location:Spain , Barcelona

Category:IT - Software Development

Contract Type:B2B

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

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Job Posted:December 27, 2025

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

Similar Jobs for Freelance Senior Full Stack Developer

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Location:
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Contract Type:
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Job Posted:
December 27, 2025