Senior Backend Engineer (Telco Integration Lead) Golang in London

Escritor y articulista is seeking a deeply technical and security‐minded Senior Backend Engineer to join a newly‐founded, high‐impact AI joint venture. Backed by five of the world's leading telecommunications giants, our mission is to restore trust in global voice communication.

This role is not a standard backend position. You will own and build the bridge to the unique, privileged access to network‐level intelligence via the GSMA CAMARA API standard, responsible for building the out‐of‐band data path that enables our flagship Telco‐Verified Security Shield and its sub‐500ms Time‐to‐Trust metric.

• Own and build the Security Signal Ingestion path, the secure, low‐latency, and out‐of‐band data channel connecting to our founding members' network API gateways.
• Architect and implement a carrier‐agnostic, vendor‐agnostic connector layer to consume RESTful APIs from heterogeneous global telco partners and IMS vendors (e.g., Nokia, Ericsson, Mavenir).
• Serve as the primary technical liaison to the engineering teams at telco founders (Deutsche Telekom, Singtel, SKT, etc.), working hand‐in‐glove to navigate, validate, and productionise their new CAMARA network APIs.
• Design and build high‐throughput microservices that ingest, normalise, and cache network signals (e.g., sim‐swap, device‐roaming‐status) for use in our real‐time Scam_Score model.
• Implement a mandatory Zero Trust security model for this critical integration, including mTLS, least‐privilege IAM, and network micro‐segmentation.
• Serve as the Critical Path Owner for Track Zero, a 30‐day sprint to validate and integrate real‐time signals from at least two telco partners, culminating in a Go/No‐Go demo.
• Ensure all network API integrations meet stringent P99 latency budgets (e.g., Collaborate with the platform team to build a parallel development path using mocked data to mitigate risks of network API delays.
• Define and own the data contracts and pipelines that feed this ground‐truth network data from the integration layer to our core AI Service Bus (Apache Kafka).
• Work closely with the Scam Detection Service and AI/ML teams to define feature vectors and data payloads needed from the network to power proprietary machine learning models.
• Partner with product and leadership to define the Phase 2 (post‐MWC) roadmap for co‐developing new proprietary network APIs (e.g., Caller_Velocity from CDRs) that will become our long‐term, indefensible moat.
• Document integration architectures, data schemas, and security controls to create setup guides for our founding member partners.
• Collaborate with external InfoSec vendor to continuously validate and harden the integration layer against threats.

• Bachelor's degree in Computer Science, Engineering, or a related field.
• 7+ years of hands‐on experience in backend engineering, with a proven track record of building and maintaining high‐performance, distributed systems in production.
• Minimum of 5 years of production experience with Go (Golang). Experience in other languages (e.g., Python, Node.js) is valued but not a replacement for this core Go requirement.
• Strong experience with real‐time, low‐latency data processing and obsession over milliseconds.
• Proficiency with cloud platforms (AWS, GCP, or Azure) and containerization technologies (Kubernetes, Docker).
• Deep understanding of API design (REST, gRPC, Webhooks) and API security (OAuth 2.0, mTLS, JWTs).
• Knowledge of telecommunications protocols and architectures, comfortable talking to network engineers.
• Experience with high‐throughput messaging or streaming platforms (e.g., Kafka, Pulsar).

This is a permanent position with hybrid working of two days a week in the central London office and the rest WFH. The salary is very much dependent on experience with a guide between £110k‐£140k basic + package.