Full Stack Software Engineer

Hashlist; Poissy; On-site; EUR 60,000 - 80,000; Full time

Benefits offered by this job

Competitive package

High-impact, high-visibility role

Job summary

Hashlist is seeking an experienced AWS Full Stack Developer to provide technical leadership while developing cloud-native applications. This role involves hands-on development and mentorship, collaborating with engineering and product teams to shape technical direction.

The ideal candidate will have over 5 years in data engineering, significant experience with AWS, and strong skills in Python or Java. Benefits include a competitive package and high-impact roles within advanced vehicle programs.

Qualifications

• 5+ years in data engineering and software development.
• 4+ years hands-on with AWS cloud services.
• 4+ years building production data applications across relational and columnar data stores.

Responsibilities

• Lead the design and implementation of scalable AWS-based systems.
• Drive cloud architecture decisions across compute, storage, networking, and security.
• Mentor senior and mid-level engineers and raise the technical bar.

Skills

AWS cloud services

Python

Java

Big Data technologies

API design

Data quality control

Education

Degree in Computer Science, Engineering, Mathematics or related field

Tools

Spark

BigQuery

AWS S3

Kafka

Flink

Airflow

Job description

We're looking for an AWS Full Stack Developer to provide technical leadership across multiple teams while building and evolving cloud-native applications. This role blends hands‑on development with system design, architectural decision‑making, and mentorship — partnering closely with engineering leadership, product, and platform teams to shape long‑term technical direction.

• Contract type: Permanent/Contract
• Benefits: Competitive package; high‑impact, high‑visibility role within a major software‑defined vehicle programme

Role Focus

• Lead the design and implementation of scalable, secure, and resilient AWS‑based systems
• Drive cloud architecture decisions across compute, storage, networking, and security
• Architect and build full‑stack applications using Python and Java
• Build and evolve RESTful APIs and event‑driven services
• Design and iterate data pipelines using Big Data technologies
• Build custom ETL processes and real‑time pipelines with strong data quality controls
• Mentor senior and mid‑level engineers and raise the technical bar
• Collaborate on roadmap planning and influence product and technical strategy

What We're Looking For

• 5+ years in data engineering and software development
• 4+ years hands‑on with AWS cloud services
• 4+ years building production data applications across relational and columnar data stores
• Strong proficiency in Python or Java
• Experience with Big Data platforms — Spark, BigQuery, AWS S3, or equivalent
• Familiarity with event‑driven architectures, Kafka, Flink, and streaming data
• Experience with workflow engines such as Airflow, Luigi, or Azure Data Factory
• Strong API design, data quality, and validation skills
• Degree in Computer Science, Engineering, Mathematics, or related field preferred