Senior Tech Lead

hace 1 semana

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

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