- Expertini Resume Scoring: Our Semantic Matching Algorithm evaluates your CV/Résumé before you apply for this job role: Backend Lead Developer.
Urgent! Backend Lead Developer Job Opening In Barcelona – Now Hiring DcentraLab
Overview
Join to apply for the
Backend Lead Developer
role at
DcentraLab Get AI-powered advice on this job and more exclusive features.
Location:
Remote/Belgrade Type:
Full-time Web3 Index is a business development tool designed to discover, analyze, and curate the most comprehensive information about blockchain and crypto projects.
We aggregate and enrich data from sources like CoinGecko, CoinMarketCap, CypherHunter, and more.
Using AI (ChatGPT, Perplexity, CrewAI), advanced scraping techniques, and databases (PostgreSQL, MongoDB), we deliver high-quality, actionable insights to users.
Our platform powers: Data aggregation & enrichment (socials, team, LinkedIn, project metadata).
AI-powered search & embeddings using MongoDB Vector DB.
AI agents that research and validate project data.
Integrations with TalkJS, Apollo, Slack, Twitter, Cloudflare, Postmark, Tranzilla, SimilarWeb, and more.
We are now looking for a
Backend Lead Developer
to lead our technical backend efforts, drive innovation, and ensure scalability of our growing platform.
Responsibilities
Lead backend development: Drive feature design, architecture decisions, and technical roadmap for the platform.
Research & Development (R&D): Experiment with new technologies, AI models, and scraping methods to continuously improve data quality and system performance.
Web scraping & data pipelines: Design and maintain robust scraping systems using Python libraries (e.g., Scrapy, Requests, BeautifulSoup, Playwright).
Database management: Optimize and maintain PostgreSQL (with Alembic/Alchemy) and MongoDB (vector search/embeddings).
AI & agent integration: Work with LLMs (ChatGPT, Perplexity) and CrewAI to build and scale AI-driven features.
DevOps & infrastructure: Manage AWS services (S3, EC2, Lambda, CloudWatch, API Gateway, SageMaker) and automation (Bash scripting, cron jobs).
Blockchain expertise: Analyze and interact with smart contracts (Solidity – entry level), understand blockchain data structures, and integrate relevant protocols.
Team leadership: Mentor developers, perform code reviews, enforce best practices, and ensure high-quality deliverables.
Integration management: Oversee and expand integrations with 3rd-party APIs and services (TalkJS, Slack, Twitter, Apollo, etc.).
Requirements
5+ years of backend development experience, with at least 2 years in a lead/architect role.
Strong Python skills (FastAPI, Flask, Django or similar).
Proven experience with web scraping at scale.
Solid understanding of PostgreSQL (schemas, migrations, performance tuning) and MongoDB (vector DB, embeddings).
Familiarity with AI/LLM frameworks and data pipelines.
Hands-on AWS experience (EC2, S3, CloudWatch, API Gateway, Lambda, SageMaker).
Knowledge of blockchain/web3 ecosystems, with the ability to read/write Solidity contracts (entry-level).
Strong DevOps skills (Bash, cron, deployment automation).
Excellent problem-solving skills and ability to take ownership of complex systems.
Strong communication and leadership abilities.
Nice-to-Have
Experience with CrewAI or other agent frameworks.
Knowledge of data enrichment and NLP pipelines.
Exposure to business intelligence tools and analytics.
Open-source contributions or published work in scraping/AI/blockchain.
What We Offer
Opportunity to lead a cutting-edge Web3/AI product.
Work with modern stacks (AI, blockchain, web scraping, embeddings).
Flexible remote-first work environment.
Growth potential in leadership and architecture.
Competitive compensation package.
#J-18808-Ljbffr
✨ Smart • Intelligent • Private • Secure
Practice for Any Interview Q&A (AI Enabled)
Predict interview Q&A (AI Supported)
Mock interview trainer (AI Supported)
Ace behavioral interviews (AI Powered)
Record interview questions (Confidential)
Master your interviews
Track your answers (Confidential)
Schedule your applications (Confidential)
Create perfect cover letters (AI Supported)
Analyze your resume (NLP Supported)
ATS compatibility check (AI Supported)
Optimize your applications (AI Supported)
O*NET Supported
O*NET Supported
O*NET Supported
O*NET Supported
O*NET Supported
European Union Recommended
Institution Recommended
Institution Recommended
Researcher Recommended
IT Savvy Recommended
Trades Recommended
O*NET Supported
Artist Recommended
Researchers Recommended
Create your account
Access your account
Create your professional profile
Preview your profile
Your saved opportunities
Reviews you've given
Companies you follow
Discover employers
O*NET Supported
Common questions answered
Help for job seekers
How matching works
Customized job suggestions
Fast application process
Manage alert settings
Understanding alerts
How we match resumes
Professional branding guide
Increase your visibility
Get verified status
Learn about our AI
How ATS ranks you
AI-powered matching
Join thousands of professionals who've advanced their careers with our platform
Unlock Your Backend Lead Potential: Insight & Career Growth Guide
Real-time Backend Lead Jobs Trends in Barcelona, Spain (Graphical Representation)
Explore profound insights with Expertini's real-time, in-depth analysis, showcased through the graph below. This graph displays the job market trends for Backend Lead in Barcelona, Spain using a bar chart to represent the number of jobs available and a trend line to illustrate the trend over time. Specifically, the graph shows 21878 jobs in Spain and 4905 jobs in Barcelona. This comprehensive analysis highlights market share and opportunities for professionals in Backend Lead roles. These dynamic trends provide a better understanding of the job market landscape in these regions.
Great news! DcentraLab is currently hiring and seeking a Backend Lead Developer to join their team. Feel free to download the job details.
Wait no longer! Are you also interested in exploring similar jobs? Search now: Backend Lead Developer Jobs Barcelona.
An organization's rules and standards set how people should be treated in the office and how different situations should be handled. The work culture at DcentraLab adheres to the cultural norms as outlined by Expertini.
The fundamental ethical values are:The average salary range for a Backend Lead Developer Jobs Spain varies, but the pay scale is rated "Standard" in Barcelona. Salary levels may vary depending on your industry, experience, and skills. It's essential to research and negotiate effectively. We advise reading the full job specification before proceeding with the application to understand the salary package.
Key qualifications for Backend Lead Developer typically include Informática Y Tecnología and a list of qualifications and expertise as mentioned in the job specification. Be sure to check the specific job listing for detailed requirements and qualifications.
To improve your chances of getting hired for Backend Lead Developer, consider enhancing your skills. Check your CV/Résumé Score with our free Resume Scoring Tool. We have an in-built Resume Scoring tool that gives you the matching score for each job based on your CV/Résumé once it is uploaded. This can help you align your CV/Résumé according to the job requirements and enhance your skills if needed.
Here are some tips to help you prepare for and ace your job interview:
Before the Interview:To prepare for your Backend Lead Developer interview at DcentraLab, research the company, understand the job requirements, and practice common interview questions.
Highlight your leadership skills, achievements, and strategic thinking abilities. Be prepared to discuss your experience with HR, including your approach to meeting targets as a team player. Additionally, review the DcentraLab's products or services and be prepared to discuss how you can contribute to their success.
By following these tips, you can increase your chances of making a positive impression and landing the job!
Setting up job alerts for Backend Lead Developer is easy with Spain Jobs Expertini. Simply visit our job alerts page here, enter your preferred job title and location, and choose how often you want to receive notifications. You'll get the latest job openings sent directly to your email for FREE!