Freelance Senior Full Stack Developer Job at Blu Selection (Barcelona)

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 MarTech Specialist

We are looking for a MarTech Specialist with strong expertise in web tracking pr...

Location

Spain

Salary:

Not provided

Leadtech Group

Expiration Date

Until further notice

Requirements

Deep experience working on web products in production
Deep understanding of attribution across modern tracking environments
Solid understanding of how Ad Networks work
Experience working with architectures where tools like Google Tag Gateway (GTG) or equivalent network-side signal routing solutions play a key role
Experience designing, implementing, and optimizing server-to-server (S2S) conversion and event tracking setups across Ad Networks
Understand how hashing, normalization, and formatting of user identifiers directly impact match rates
Hands-on experience with online payments (Stripe, card gateways)
Experience with GA4 and Amplitude
Experience with CMPs / consent management tools (e.g., Didomi, OneTrust, Usercentrics)
Practical experience with cloud systems (ideally GCP: BigQuery, Cloud Functions, Pub/Sub, APIs)

Job Responsibility

Own the technical implementation and maintenance of web tracking (client-side and server-side)
Lead Google Tag Manager setups (including S2S GTM) and ensure accurate data capture for analytics and attribution
Work on web projects, ideally for subscription-based businesses
Implement and manage online payments data capture (e.g., Stripe, card gateways)
Use GA4 and Amplitude
Maintain robust tagging and tracking (events, funnels, data layers)
Collaborate with SEO teams on landing pages, organic funnels, and Google Search Console insights
Engage with CMPs/consent management tools and coordinate with Legal teams to ensure proper signal firing and compliance
Leverage cloud systems (ideally GCP) and SQL to query data in a Data Warehouse
Coordinate with App MarTech where relevant

What we offer

Real ownership of projects
Room to grow
Future opportunities
A company where your voice matters

Fulltime

New

Environmental service tech

Location

United States , Aurora

Salary:

19.80 - 29.70 USD / Hour

Advocate Health Care

Expiration Date

Until further notice

Requirements

Ability to operate various types of cleaning equipment, including machine scrubbers, carpet cleaners, waste compactors, balers, etc.
Ability to follow and understand oral and written instructions and communicate with others.
Ability to work alone and to understand the physical arrangements of the facilities.
Performs tasks without disrupting operations of the doctors, nurses, patients, public, and other staff.
Ability to set priorities, be aware of and follow department policies and procedures in all situations.
Basic computer skills.
Excellent customer service skills.
Must be able to lift up to 50 lbs. from floor to a maximum 5 ft.
Must be able to lift and carry up to 30 lbs. at waist height a reasonable distance.
Must be able to push/pull up to 50 lbs. with the assistance of other staff and/or devices.

Job Responsibility

Cleans furniture and carpets in rooms, hallways, stairs, and offices using power equipment.
Cleans and maintains floor surfaces with dry and wet mops.
Refinishes floors, including machine scrubbing and/or stripping floors and applies floor finish.
Operates various types of cleaning equipment, both mechanical and electrical.
Notifies appropriate person of safety hazards and of equipment needing repair.
Cleans equipment, cart, and service closet daily.
Assists in cleaning emergency spills as requested.
Uses chemicals, cleaning products and equipment for their intended purpose to maintain a safe, cost-effective environment.
Ensures all cleaning supplies are labeled and references Material Safety Data Sheets (MSDS) as necessary.
Sets up rooms for meetings and delivers audio visual equipment to the rooms.

What we offer

Paid Time Off programs
Health and welfare benefits such as medical, dental, vision, life, and Short- and Long-Term Disability
Flexible Spending Accounts for eligible health care and dependent care expenses
Family benefits such as adoption assistance and paid parental leave
Defined contribution retirement plans with employer match and other financial wellness programs
Educational Assistance Program

Fulltime

New

Supervisor, Cyber Operations

Georgia System Operations Corporation (GSOC) is a non-profit cooperative that op...

Location

United States , Tucker, Georgia

Salary:

124200.00 - 155200.00 USD / Year

Georgia System Operations

Expiration Date

Until further notice

Requirements

Bachelor's degree in Cyber Security, Computer Science or Engineering, Information Technology, or a related field
Requires 10 or more years of experience with increasing responsibilities
At least 3 years of experience must be in a cyber security role
Must also have experience with technical writing
Experience leading, motivating, and developing a team of IT/OT professionals, preferably in a SOC environment
Experience in asset and change management principles and practices
Strong technical knowledge and experience with cyber security platform, applications, tools, and industry best practices
Excellent written and verbal communication skills, including the ability to clearly explain technical issues to both technical and non-technical stakeholders
Experience working in regulated environments such as NERC CIP or others is highly desired
Equivalent Experience: Associates Degree in Engineering, Engineering Technology, or Business, with at least 12 years of experience, with increasing responsibility, in electronic maintenance, cyber security, and/or information technology as described above. At least 5 years' experience must be in a cyber security role

Job Responsibility

Manage OT security event monitoring alert response, initial triage, and escalation
Manage OT access provisioning and revocation of accounts and roles required for CIP systems, data, and applications
Manage OT vulnerability management and threat intelligence programs
Manage OT asset management program for Bulk Electric System Cyber Systems and Assets
Evaluate emerging technologies and assess their applicability to various cyber programs
Collaborate with cross-functional teams, including operations and maintenance, engineering, audit, and IT, to ensure compliance with NERC CIP standards and other cyber programs
Provide technical guidance and mentorship to Security Operations analysts and PSOC/NOC (Physical Security Operations Center/Network Operations Center) operators
Supervision and performance management of staff, support of the processes and technology necessary for team effectiveness, and coordination of activities with other teams and departments within the FOC
Lead efforts to develop cyber programs, processes and activities that meet strategic business and security objectives and enable uninterrupted business and operations activities
Provide work direction and technical assistance to analysts in the Security Operations department. Take a hands-on role in mentoring, coaching, and developing other team members

What we offer

comprehensive medical, dental, and vision coverage
a strong retirement program
career development
flexible work schedules

Fulltime

New

Driver - Class A

Currently, are seeking a qualified Class A Driver to work collaboratively with o...

Location

United States , Salt Lake City

Salary:

31.00 - 36.00 USD / Hour

Sierra Pacific Industries

Expiration Date

March 06, 2026

Requirements

Must have Class A license
Must have current medical card
Must have clean DMV record
Must have good work references
Demonstrated ability to drive a manual transmission vehicle
Preference given to applicants with commercial truck driving experience or educational equivalent

Job Responsibility

Load and deliver windows to customers
Drive both a bobtail truck and tractor-trailer
Hook and unhook trailers
Able to pull and/or push up to 100lbs
Operate in accordance with all local, state, and federal traffic laws
Maintain accurate record keeping, meet dispatch schedules
Perform duties in a safe and efficient manner

What we offer

Up to $1,500 hiring bonus
We train and promote from within
Excellent low-cost health benefits
Retirement plan with employer-paid contributions
Paid vacation
10 holidays
Full Health Benefits Plan (including medical, dental, and vision) with low-cost premiums
401(k) with Company Match
additional Retirement Contributions
company-paid Life Insurance

Fulltime

New

Digital Product Owner - Standards & Governance Lead

Within Bank of Ireland we are evolving our business to respond to the continuous...

Location

Ireland , Dublin

Salary:

Not provided

Bank of Ireland

Expiration Date

March 01, 2026

Requirements

Strong experience in Product Ownership, Agile delivery, or governance roles within financial services or regulated environments
Deep understanding of Agile frameworks and enterprise delivery models
Validated ability to develop and implement standards and governance structures
Excellent analytical, communication, and partner leadership skills
Familiarity with risk management, regulatory adherence, and audit processes is helpful

Job Responsibility

Standards Definition & Maintenance: Develop and maintain a comprehensive set of standards and guidelines for Product Ownership, including role expectations, artefacts, ceremonies, and decision rights
Ensure alignment with Agile delivery models, regulatory requirements, and Bank of Ireland's strategic objectives
Regularly review and update standards to reflect evolving practices and feedback from the Product Owner community
Governance Frameworks: Establish governance structures to support effective oversight of Product Owner activities, including prioritisation, backlog management, and value delivery
Define and implement mechanisms for role accountability, critical issue paths, and decision-making protocols
Collaborate with Risk, Compliance, and Audit teams to ensure governance frameworks meet internal and external requirements
Compliance & Assurance: Monitor adherence to Product Owner standards across tribes and business units
Support internal reviews and audits by providing evidence of compliance and maturity
Identify gaps and risks in practice adoption and propose mitigation strategies
Stakeholder Engagement: Work closely with Tribe Leads, Agile Coaches, and other CoEs to embed standards and governance into day-to-day operations

What we offer

Hybrid working
25 days annual leave
Excellent pension contributions
Six months paid leave for birthing parents
Innovative fertility and surrogacy policy
Supports for working parents and carers
Substantial health insurance contribution
Employee assistance program
WebDoctor
Financial wellbeing coaches

Fulltime

New

Specialist SEN Support Assistant

Do you possess a genuine drive to transform the lives of students with additiona...

Location

United Kingdom , Horsham

Salary:

Not provided

Randstad

Expiration Date

April 07, 2026

Requirements

Practical experience assisting learners with SEN (Autism, ADHD, SEMH, or MLD)
Preferably possess a Level 2 or 3 TA qualification or substantial relevant professional history
Skilled at establishing quick connections with students, colleagues, and families
Capable of staying composed in demanding situations and acting as a dependable mentor for pupils
Seeking a long-term placement where you can become a cornerstone of the school environment

Job Responsibility

Deliver Targeted Assistance: Partner with specific cohorts or individual learners to provide a reliable foundation for their success
Execute EHCP Goals: Utilise Education, Health and Care Plans to facilitate customised learning objectives and developmental milestones
Manage Behavioural Needs: Apply uniform techniques to navigate complex behaviours and encourage healthy emotional self-regulation
Foster Independence: Enhance students' interpersonal skills and self-reliance, guiding them through social exchanges and everyday habits
Engage in Teamwork: Act as a crucial member of a diverse professional group, including classroom teachers, SENCOs, and visiting specialists
Provide Personal Care: Offer assistance with personal care as needed, maintaining the student's dignity and wellbeing at all times

What we offer

Attractive Salary: A steady daily wage of £90.00 - £95.00
Professional Advancement: Access to specialised SEN workshops and career progression within Horsham academic institutions
Work-Life Balance: A fixed Monday-to-Friday routine during the academic terms
Impactful Contribution: The opportunity to observe the long-term positive evolution of a child's educational journey

Fulltime

New

Product Manager - Growth & Monetization

We are seeking a highly analytical and impact-driven Product Manager – Growth & ...

Location

Spain , Barcelona

Salary:

Not provided

Leadtech Group

Expiration Date

Until further notice

Requirements

3+ years of experience in Product, Growth, or Monetization roles, preferably in mobile subscription-based apps
Strong understanding of growth and monetization metrics: LTV, ARPU, churn, CAC, ROAS, retention
Solid knowledge of Ads Monetization fundamentals (e.g. CPM, ARPDAU, fill rate, ad formats)
Experience working with hybrid monetization models (subscriptions + ads)
Proven ability to model financial impact and forecast revenue from product initiatives
Strong competitor analysis and market research skills
Excellent communication, stakeholder management, and cross-functional collaboration skills
Highly analytical, proactive, and results-oriented mindset

Job Responsibility

Analyze app performance, user behavior, and funnels to identify monetization and revenue growth opportunities
Define, scope, and prioritize revenue-driving product and UX initiatives supported by clear business cases
Ensure roadmap initiatives include forecasted revenue impact, ROI, and success criteria
Drive improvements across trial conversion, retention, LTV, ARPU, and overall revenue efficiency
Partially own Ads Monetization strategy across the app portfolio in collaboration with Monetization, UA, and BI teams
Identify and prioritize ads-related product opportunities (e.g. rewarded ads, interstitials, hybrid free tiers)
Define ad placement and UX strategies that balance revenue optimization and user experience
Evaluate ads performance metrics (e.g. ARPDAU, CPMs, fill rate) and translate insights into product initiatives
Collaborate with external partners (e.g. Google AdMob, mediation platforms) to support region-specific monetization strategies
Monitor competitor ad strategies and ensure insights inform internal roadmap decisions

What we offer

Growth and career development
Flexible career path with personalized internal training
Annual budget for external learning opportunities
Flexible schedule with flextime
Option of working full remote or from our Barcelona office
Free Friday afternoons with a 7-hour workday
35-hour workweek in July and August
Competitive salary
Full-time permanent contract
Top-tier private health insurance (including dental and psychological services)

Fulltime

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

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Blu Selection

Location:Spain , Barcelona

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Contract Type:B2B

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:December 27, 2025

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Job Posted:
December 27, 2025