Senior Software Developer

Sia; Belgique (MO); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Training opportunities

Mobility budget

Company car

Performance-related bonus

Job summary

Sia is seeking a Senior Software Developer in Missouri, USA to lead transformation projects. The role involves back-end and front-end development, focusing on data and AI solutions. Candidates should have a Master’s degree and 3-6 years of relevant experience, with proficiency in multiple programming languages.

Sia promotes diversity and offers benefits like a competitive salary, personal development plans, and a great working atmosphere.

Qualifications

• You have 3-6 years of relevant working experience.
• You’re a fast learner and communicative.
• You have excellent skills in English, Dutch, and French.

Responsibilities

• Design and maintain applications and APIs using Python and TypeScript.
• Support front-end development with modern technologies.
• Contribute to CI/CD pipelines and containerized deployments.

Skills

Back-end development

Front-end development

DevOps practices

Big Data technologies

Analytical skills

Fast learner

Strong interest in data and AI

Excellent communication skills in English, Dutch, and French

Education

Master’s degree

Tools

Python

TypeScript

Java

Flask

Django

Spring Boot

Express

SQLAlchemy

Docker

Kubernetes

Apache Spark

Kafka

Airflow

Flink

Hadoop

Job description

Role Overview

As a Senior Software Developer with strong back‑end capabilities and a good understanding of front‑end development, you will be involved in transformation projects at our clients. You will execute project assignments in software development, modelling and digital transformation environments, with a good deal of business perspective.

Responsibilities

• Back‑end development: designing, developing and maintaining robust, scalable and secure applications, APIs and system integrations using Python and TypeScript/Node.js (Java as a nice to have), with mainstream frameworks such as Flask, Django, Spring Boot and Express; building data and service layers with tools such as SQLAlchemy, Marshmallow and Alembic; and working with API architectures and integration patterns across distributed systems, including REST and GraphQL.


• Front‑end contribution: supporting the implementation of user‑facing features and collaborating on interface development when needed, using modern front‑end technologies such as TypeScript, React, Angular and Vue.js, along with tooling and frameworks such as Vite, Next.js and Nuxt.js.


• DevOps and software delivery: contributing to CI/CD pipelines, containerised deployments and release processes in GitLab CI/CD, Docker and Kubernetes environments, with attention to code quality, testing, observability and maintainability.


• Big Data and cloud: applying algorithmic knowledge to large‑scale data processing using technologies such as Apache Spark, Kafka, Airflow, Flink and Hadoop, and contributing to the design, deployment and operation of cloud‑native data platforms across Azure, AWS and GCP, including modern environments such as Databricks, with exposure to scalable storage, compute, orchestration and distributed processing architectures.

Internal Activities

• Development and reinforcement of our offer, by contributing to the structuring of our software, data, cloud and AI offerings, building points of view on emerging technologies and helping define relevant solution approaches for our clients.


• Business development, by contributing to one‑on‑one definition and participating in our commercial initiatives, helping translate business needs into modern software, data and AI solution architectures.

Qualifications

• You have a Master’s degree.


• You have 3‑6 years relevant working experience.


• Analytical mind, exploring options and able to synthesize into conclusions.


• You’re a fast learner, communicative, flexible and entrepreneurial.


• You have a strong interest in data and AI‑related topics, the ability to quickly build expertise in these areas, and you’re excited about helping our clients seize the opportunities they offer.


• Excellent English, Dutch and French verbal and written skills are required. If you also speak German fluently, that’s a great plus!


• Passionate about Energy!

Benefits

• An international company that gives importance to diversity, inclusion, employee well‑being and corporate social responsibility actions.


• A great working atmosphere with friendly and professional colleagues where innovation and entrepreneurship are encouraged.


• A personal development plan with regular follow‑up, as well as training opportunities to develop yourself.


• A competitive salary with great advantages, like a mobility budget or company car, hospital insurance, performance‑related bonus, etc.

We are unable to provide a work permit for this position.

Sia is an equal opportunity employer. All aspects of employment, including hiring, promotion, remuneration, or discipline, are based solely on performance, competence, conduct, or business needs.