Senior Software Engineer

Complexio

London, England, United Kingdom Remote permanent

Posted: September 24, 2025

Quick Summary

A Senior Software Engineer is responsible for building complex AI models that automate business activities by ingesting data from various sources and making sense of it, with a focus on creating a deep understanding of how humans interact with the system. This requires expertise in programming languages, data structures, and algorithms, as well as a strong understanding of AI principles and software development methodologies.

Required Skills

Job Description

Complexio's Foundational AI works to automate business activities by ingesting whole company data – both structured and unstructured – and making sense of it. Using proprietary models and algorithms Complexio forms a deep understanding of how humans are interacting and using it. Automation can then replicate and improve these actions independently.

Complexio is a joint venture between Hafnia and Símbolo, in partnership with Marfin Management, C Transport Maritime, Trans Sea Transport and BW Epic Kosan.

As a Senior Software Engineer with broad expertise, you will be a vital part of our team, developing innovative applications that leverage AI capabilities to enhance user experiences and streamline communication. You will work alongside a talented team of Data Scientists, DevOps, Product Managers, Business Analysts experts and play a key role in designing and implementing specialized AI assistant technology.

You have:

Excellent problem-solving and technical skills. Strong communication and collaboration skills, with the ability to work in a team. Interest and experience in working on early-stage software and a wide range of tasks. Proven experience using technology and how it helped you build a lasting product.

Requirements:
• Preferred M.Sc or Ph.d degree in Computer Science or a related field.
• 7+ years of experience in Software development Work experience using both compiled languages (Rust, Ocaml, Golang, Java, C#) or dynamic languages (Javascript, Python, Ruby)
• Experience building web applications or desktop applications technologies such as Electron, tauri, React, Vue.js
• Familiarity with CI/CD principles and technologies, including experience with GitHub Actions or similar.
• Experience working with Relational and NoSQL databases such as Postgres, Redis, Neo4j, Milviousor MongoDB, and a good understanding of data consistency tradeoffs.
• Proven Knowledge of cloud platforms (e.g., AWS, Azure, or GCP).

A bonus:

• A bonus:
• Experience with graph databases such as neo4js, pinecone or milvius or similar.
• Experience building native desktop apps.
• Experience with NLP libraries and frameworks, such as spaCy, or Transformers.
• Familiarity with machine learning concepts and the ability to work with NLP datase

Benefits:
• Work with a groundbreaking AI platform solving real enterprise pain points
• Help clients achieve measurable ROI through next-gen automation
• Join a remote-first, globally distributed team backed by industry leaders
• Shape the success function and influence product direction in a fast-scaling AI company

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