Senior Tech Lead

hace 6 días

Barcelona, Barcelona, España SMARTCORE AG A tiempo completo

Product:
Anti-fraud System |
Stack:
Golang, , TypeScript, ClickHouse, Kafka, Tigergraph

Format:
Remote |
Employment:
Full-time |
Compensation:
starting from €8,000

SmartCore
is a fintech holding, building a mission-critical fintech platform. Our real-time system protects millions of transactions from fraud. We are looking for a
n engineer with a strong architectural background
— someone who understands that a programming language is just a tool.

If you possess mastery in

,
Java
,
Go
,
C#
,
Rust
,
Python
, or
C++
, and have deep expertise in building complex systems, and are ready to apply your experience within a
Golang
/

/
TypeScript
ecosystem, we should definitely talk

Our Tech Stack (you will work with)

We expect you to adapt quickly and bring your own expertise:

Backend:
, TypeScript, NestJS, Go

Data:
PostgreSQL, ClickHouse, Redis, Tigergraph

Messaging / Streaming:
Kafka, RabbitMQ

Big Data:
Apache Flink

Your Challenges (Architecture & Engineering)

You will lead the development of the core of our anti-fraud system. The tasks are language-agnostic — they are rooted in Computer Science:

Real-time Scoring Engine

Design a risk-scoring engine with p99 latency in the tens of milliseconds (device fingerprinting, behavioral analytics).

Distributed Systems Design

Build an idempotent, event-driven architecture resilient to entire data-center failures.

High-Performance Analytics

Optimize data storage and access (millions of transactions) for analytics and ML models.

Data Consistency

Implement complex profile-merging logic (Customer 360) and manage distributed transactions (Saga, TCC).

What You Will Work On

  • Define the technical vision and architecture of the platform (we primarily use , but expect you to bring best practices from Java/Go/Enterprise environments).
  • Design data schemas for PostgreSQL and ClickHouse under extreme load.
  • Build reliable data-processing pipelines (Kafka, Flink).
  • Mentor the team: teaching engineers to think in terms of algorithmic complexity, memory, and concurrency — not just business logic.
  • Act as an evangelist for AI-powered development (we actively use LLMs and Cursor).

Ideal Candidate Profile

  • Engineering DNA

10+ years of commercial experience, including 3+ years as a Tech Lead / Architect.

  • Language-Agnostic Mindset

Deep knowledge of any strongly typed language (Java, Go, C#, Rust, etc.) and willingness to write in

  • System Design Mastery

Professional command of distributed-systems patterns. Experience with message brokers (Kafka/RabbitMQ) at the delivery-guarantee level.

  • AI-Native Mindset (Critical)

You use LLMs not as a toy but as a productivity multiplier (boilerplate generation, refactoring, tests, data analysis). Experience with Cursor IDE or similar tools.

Nice to Have

  • Experience with (even minimal)
  • Experience with anti-fraud systems, billing, or high-frequency trading
  • Experience with streaming systems (Flink, Spark Streaming)

We Offer

  • Competitive compensation
    (defined individually; aligned with Senior/Principal level)
  • Fully remote work with a flexible schedule
  • Ability to bring best practices from your core stack into our platform
  • No legacy and no bureaucracy
  • Corporate access to cutting-edge LLMs and personal learning budget

  • Tech Lead –

    hace 6 días

    Barcelona, Barcelona, España Zaidan It Solutions. A tiempo completo

    Tech Lead – | Entorno internacional (Barcelona híbrido)¿Te motiva liderar proyectos tech de alto nivel en un entorno 100% internacional, donde se valora tanto tu visión arquitectónica como tu capacidad de guiar personas?Este reto te permitirá marcar la dirección técnica de soluciones innovadoras, mientras creces en un equipo global, ágil y...

  • Ingeniero/a Senior de Sistemas – Tech Lead

    hace 6 días

    Barcelona, Barcelona, España INGENIEROJOB A tiempo completo

    de la ofertaIngeniero/a Senior de Sistemas – Tech LeadDescripciónEn BETWEEN te ofrecemos las oportunidades que necesitas para alcanzar tus objetivos profesionales. Si quieres desarrollar tus capacidades en IT e Ingeniería este es tu próximo destino Damos soporte en una gran variedad de áreas como Firmware, Software, BI, Diseño, Project Management y...

  • Tech Lead Mobile

    hace 2 semanas

    Barcelona, Barcelona, España Wizeline A tiempo completo

    Tech Lead Mobile (iOS/Android)Location:Barcelona, Spain (Hybrid – 2 days onsite, 3 days remote)We are:Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global...

  • Senior Machine Learning Engineer

    hace 2 semanas

    Barcelona, Barcelona, España Botify Tech A tiempo completo

    Senior Machine Learning Engineer - LLMs (Contract)HYBRID - Barcelona (RELOCATION IS MANDATORY)€55,000 - €80,000 + Signing BonusBotify Tech has partnered with one of the TOP AI businesses Globally, they are on the lookout for a Senior Machine Learning Engineer with a strong background within LLM's.Key Skills & Experience RequiredProven use of model...

  • Tech Lead Back

    hace 3 horas

    Barcelona, Barcelona, España Babel A tiempo completo

    We are One Team. We make it happen. We are Unstoppable.BABEL es una consultora tecnológica multinacional especializada en aplicar sus servicios y conocimiento tecnológico en los procesos de aceleración digital de sus clientes, grandes empresas y organismos públicos.¿Cuál es nuestro plan estratégico?Miramos hacia el futuro Nuestro plan estratégico...

  • Generative AI Tech Lead

    hace 2 horas

    Barcelona, Barcelona, España AXA Partners A tiempo completo

    Join AXA Partners as a Generative AI Solutions Tech Lead within our Data & Innovation Office, where you will play a crucial role in leveraging cutting-edge technologies to create value for our business. Located in Spain, you will oversee the technical leadership of Generative AI initiatives across AXA Partners worldwide, ensuring alignment with our...

  • Senior Quantum Layout Engineer

    hace 6 días

    Barcelona, Barcelona, España Qilimanjaro Quantum Tech A tiempo completo

    Qilimanjaro Quantum Tech is looking for aSenior Quantum Layout Engineerto lead thedesign and simulationof superconducting quantum processors. This role involves developing processor architectures, performing numerical simulations to extract key parameters, and drawing final layouts for fabrication. The ideal candidate has astrong background in...

  • Front End Tech Lead

    hace 2 semanas

    Barcelona, Barcelona, España SQLI A tiempo completo

    We Elevate. Digitally.SQLI, a European leader in customer experience and digital transformation, helps major international brands create value through technology and digital innovation. From strategy to the deployment of our clients technological assets, we design and build robust, high-performance architectures and engaging experiences by combining...

  • Front End Tech Lead

    hace 6 días

    Barcelona, Barcelona, España SQLI A tiempo completo

    We Elevate. Digitally.SQLI, a European leader in customer experience and digital transformation, helps major international brands create value through technology and digital innovation. From strategy to the deployment of our clients technological assets, we design and build robust, high-performance architectures and engaging experiences by combining...

  • Technical lead Manager

    hace 2 semanas

    Barcelona, Barcelona, España La French Tech Taiwan A tiempo completo

    Offres d'emploiLes SecteursIndustrieNumériqueSantéTransition écologiqueAgricultureRejoindre la Mission French TechDécouvrir les métiers de la TechTechnical lead Manager - Care IT deliveryBarcelonaFull-TimeApply NowAboutHi, we're Back Market.We're here to help make tech reliable, affordable, and better than new. We're a global marketplace for refurbished...