Senior Software Engineer: Live Delivery & Code Quality Leader

Ascendion; New Jersey; On-site; GBP 70,000 - 110,000; Full time

Job summary

Ascendion is a global AI-first software engineering services provider seeking an experienced engineer to embed in client squads for live delivery. You will refactor, write unit tests, and promote maintainability while mentoring peers to raise internal capability.

You’ll work across C++, C#, Java, Python and SQL, shaping scalable, robust systems in fast-paced environments and demonstrating strong coaching through metrics and code-quality practices.

Qualifications

• Strong software engineering fundamentals with 7+ years commercial experience.
• Experience modernising legacy systems incrementally.
• C++ where applicable; C#, Java, Python, SQL and scripting capability.

Responsibilities

• Work embedded in priority squads on live backlog items, modelling modern engineering practice.
• Lead by example on refactoring, unit test adoption, peer review and maintainability.
• Pair and mob with client engineers to build durable internal capability.
• Contribute reusable examples, patterns and playbook content from real squad work.
• Evidence adoption through code quality metrics, test coverage and standards uptake.
• Support independence tests confirming squads can sustain practices unaided.
• Demonstrable coaching of product squads through live delivery.
• Real-time, event-driven, high-volume or resilience-critical systems.

Skills

7+ years experience

Software engineering fundamentals

Pairing & coaching

Tools

C++

C#

Java

Python

SQL

Scripting

Job description

Ascendion is a global AI-first software engineering services provider seeking an experienced engineer to embed in client squads for live delivery. You will refactor, write unit tests, and promote maintainability while mentoring peers to raise internal capability.

You’ll work across C++, C#, Java, Python and SQL, shaping scalable, robust systems in fast-paced environments and demonstrating strong coaching through metrics and code-quality practices.