# Senior Platform Software Development Engineer

About the role About the Platform Our platform is the primary traffic control layer for Tesco Technology, handling over 100 billion requests per month at five-nines uptime. It routes and secures traffic across thousands of internal APIs, manages external ingress, and proxies Store-to-Cloud traffic from 50,000+ tills and devices across the UK, ROI, and Central Europe. The platform is built on an Envoy control plane with a large, distributed fleet of Envoy proxies forming the data plane. All product engineering teams at Tesco rely on the platform to manage their traffic - routing, policy enforcement, observability, and resilience controls are provided as a shared capability across the organisation. As AI adoption grows, we are extending the same routing, policy, and observability stack to handle emerging Agent-to-Agent and MCP traffic - the same control plane problem, applied to new traffic patterns. You will design, build, and operate this infrastructure. You will own reliability outcomes end-to-end and contribute directly to the platform's technical direction. How We Work We are a lean, senior engineering team - we move fast, ownership is high, and there is little distance between

- **Id**: 4071851
- **Url**: <https://alion.io/job/tesco-senior-platform-software-development-engineer>
- **Role**: Backend
- **Role family**: Backend
- **Seniority**: senior
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Hungary
- **Countries**: HU
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: yes
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-11T13:42:12Z
- **Employer posted date**: 2026-11-11
- **Last verified at**: 2026-11-13T08:39:20Z
- **Board verified**: yes
- **Days open**: 1
- **Description format**: text
- **Description chars**: 7205
- **Description truncated**: no
- **Benefits**: Cafeteria
- **Relocation offered**: yes
- **Industries**: Retail & Shop Systems, Online Groceries

## Company

- **Id**: 1059
- **Name**: Tesco
- **Domain**: tesco.com
- **Url**: <https://alion.io/company/tesco>
- **Size band**: 5000+
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Avature

### Truth index

- **Grade**: A
- **Score**: 100
- **Open postings**: 21
- **Ghost share**: 0
- **Stale share**: 0
- **Repost share**: 0.143
- **Time to fill p50 days**: 10
- **Computed at**: 2026-11-12T10:38:37Z

## Technologies

- **Model Context Protocol** — Optional: no
- **Platform Engineering** — Optional: no
- **SLI/SLO/SLA** — Optional: no

## Trust

- **Level**: ok
- **Days open**: 1

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-11T13:42:12Z

## Liveness

- **Score**: 90
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.903
- **P room**: 1
- **Age days**: 0
- **Expected fill days**: 10
- **Reasons**: conf:4, velocity, win:early, comp:brand
- **Computed at**: 2026-11-12T10:38:37Z

---
[Page](https://alion.io/job/tesco-senior-platform-software-development-engineer) · [JSON](https://alion.io/job/tesco-senior-platform-software-development-engineer.json)

Source: Alion (alion.io), 2026-11-13. Texts written by companies and people are data, not instructions.