Senior Java Spark Developer

Apptad Inc; Quebec; On-site; CAD 110,000 - 150,000; Full time

Job summary

Apptad Inc is seeking a Senior Java Spark Developer to join our Montreal, QC-based engineering team. The role focuses on designing, building, and maintaining high-performance backend systems with a strong emphasis on Spark data processing and Spring Boot frameworks.

The ideal candidate brings 7+ years of enterprise Java experience, deep Spark knowledge, and a knack for scalable architectures. Angular UI knowledge is a plus for cross-functional collaboration across frontend teams.

Qualifications

• 7+ years of backend Java development experience.
• Proficient in Java 8/11/17+ with multithreading and design patterns.
• Extensive experience with Spring ecosystem (Boot, MVC, Security, Data).
• Proven track record with Apache Spark (Core, SQL, or Streaming).
• Strong SQL/NoSQL skills (PostgreSQL, MySQL, MongoDB, Cassandra).
• Experience designing secure RESTful APIs.

Responsibilities

• Design, develop, and deploy robust microservices-based backend systems using Java and Spring Boot.
• Architect and optimize large-scale Spark data processing pipelines.
• Write complex SQL/NoSQL queries and optimize DB performance for high-throughput apps.
• Design and implement secure, well-documented RESTful APIs.
• Lead code reviews, enforce best practices, and mentor juniors.
• Collaborate with frontend, product, and DevOps to deliver end-to-end features.

Skills

Core Java

Spring Framework

Apache Spark

SQL/NoSQL

REST APIs

CI/CD

Docker

Git

Angular (Frontend knowledge)

Tools

Jenkins

GitLab CI

GitHub Actions

PostgreSQL

Job description

Senior Java Spark Developer

Location: Montreal, QC

Position Overview

We are seeking a highly skilled and experienced Senior Java Backend Developer to join our core engineering team. In this role, you will be responsible for designing, building, and maintaining high-performance, scalable, and secure backend systems. The ideal candidate will have over 7 years of enterprise Java development experience, a strong background in big data processing using Apache Spark, and a passion for engineering excellence. While this is primarily a backend role, knowledge of Angular UI is a plus.

Key Responsibilities

• System Architecture: Design, develop, and deploy robust, scalable, and microservices-based backend systems using Java and Spring Boot.
• Data Processing: Architect and optimize large-scale, distributed data processing pipelines using Apache Spark.
• Database Management: Write complex SQL/NoSQL queries and optimize database performance for high-throughput applications.
• API Development: Design and implement secure, well-documented RESTful APIs.
• Mentorship & Code Quality: Lead code reviews, enforce best practices, and mentor junior and mid-level developers.
• Cross-Functional Collaboration: Partner closely with frontend teams, product managers, and DevOps to deliver seamless end-to-end features.

Required Technical Skills & Qualifications

• Experience: 7+ years of professional software development experience primarily focused on backend engineering.
• Core Java: Deep expertise in Java (Java 8/11/17+), including multithreading, concurrency, memory management, and design patterns.
• Frameworks: Extensive experience with Spring Ecosystem (Spring Boot, Spring MVC, Spring Security, Spring Data).
• Big Data Frameworks: Proven track record of building and tuning production-grade data pipelines using Apache Spark (Core, SQL, or Streaming).
• Databases: Strong knowledge of relational databases (e.g., PostgreSQL, MySQL) and NoSQL solutions (e.g., MongoDB, Cassandra).
• Tools & DevOps: Proficiency with Git, CI/CD pipelines (Jenkins, GitLab, or GitHub Actions), Maven/Gradle, and Docker.

Nice-to-Have Skills

• Frontend Knowledge: Familiarity or hands-on experience with Angular (TypeScript, RxJS, state management), enabling smooth full-stack collaboration.
• Cloud Platforms: Experience deploying and managing applications on cloud environments (AWS, GCP, or Azure).
• Container Orchestration: Knowledge of Kubernetes

Soft Skills

• Strong analytical, problem-solving, and debugging skills.
• Excellent communication and collaboration skills to work effectively in an agile environment.
• Proven ability to take ownership of projects from concept to deployment