Senior Software Engineer

Position Overview
The Senior Software Engineer will lead one area of the Product Journey Engine (PJE), a platform that modernises the counter systems of a national post. Every counter transaction runs as a journey: a JSON definition built in a visual Designer and executed exactly as written. Working alongside the Chief Architect and the wider team, you will lead either the Journey Engine (a .NET runtime compiled to WebAssembly) or the POS Host Runtime (a TypeScript applet running inside a third-party ePOS).

Duties and Responsibilities

• Lead the design and delivery of one area of the PJE platform
• Own the contracts between engine, host and Designer, including versioning
• Troubleshoot and resolve technical issues across the engine/host boundary
• Own automated testing for your area
• Translate the specification into designs and JIRA stories, and challenge it where it is wrong or incomplete
• Mentor developers and take part in code reviews

Qualifications

• Post-secondary education in Computer Science or Software Engineering
• Substantial experience leading delivery of a complex component or service end to end
• Strong C#/.NET or TypeScript skills, with willingness to learn the other
• Experience with contract-driven design between components
• Experience building reusable libraries or SDKs with stable public APIs
• Able to meet the security clearance requirements of the target Escher client

Personal Skills

• Strong judgement and attention to correctness
• Confident challenging specifications rather than coding around them
• Treats performance, traceability and security as first-class concerns
• Ability to work as part of a team and mentor others
• Comfortable working AI-first with AI-assisted tooling

Technical Skills

• Required: .NET / C# / .NET Core or TypeScript / JavaScript
• Required: JSON and JSON Schema
• Required: Git workflows and CI/CD pipelines (Azure DevOps, GitHub Actions)
• Desirable: .NET / JavaScript interoperability
• Desirable (Journey Engine): Workflow, rules or state machine engines; WebAssembly with .NET
• Desirable (POS Host Runtime): Embedded or hosted JavaScript apps; browser peripherals integration; React and Material Design

Why Join Escher?

At Escher, you’ll be part of a global team with employees on four continents supporting customers from across 35 countries. Here, people truly are our greatest strength, and we mean it. At Escher, you’ll have the support of an experienced leadership team and a group of dedicated employees that have been helping postal operators redefine customer engagement for over 30 years.

What We Have to Offer

Escher offers a competitive compensation package, training allowance and free coffee and snacks when in the office, and so much more! Most importantly, a career at Escher is one that is both rich and rewarding with many opportunities and room for growth. This is truly a unique opportunity to be part of an exceptional team, helping to transform some of the biggest organizations in the world, and influencing the future of postal operations. If you’re up for the challenge, we want to hear from you!

Escher is an equal opportunity employer. We will not discriminate and will take affirmative actions and measures to ensure against discrimination in employment, recruitment, advertisements for employment, compensation, termination, upgrading, promotions, and other conditions of employment against any employee or job applicant on the basis of race, color, gender, national origin, age, religion, creed, disability, veteran’s status, sexual orientation, gender identity or gender expression