Staff Software Engineer – Platform

ENSEK

. Lead the technical direction and architecture of the team's domain, balancing immediate delivery needs with long-term platform scalability and maintainability .

Posted 11/3/2026full-timeRemote • United KingdomLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and building secure, scalable APIs and cloud-native services, with a strong focus on architectural decision-making and engineering standards. Proven ability to mentor engineers and collaborate across teams to enhance platform reliability and operational excellence.

Highest-signal resume keywords

API Design PrinciplesOAuth 2.0 ImplementationCloud-Native Services on AWSDistributed Systems ExpertiseInfrastructure as Code

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringDistributed SystemsAPI DevelopmentRelational DatabasesSQL ServerIdentity and Access ManagementCloud ServicesContainersDockerCI/CD Pipelines

Soft Skills

CommunicationStakeholder ManagementMentoringTechnical LeadershipCollaboration

Tools & Technologies

AWSAPI GatewayECSEKSOpenAPIMTLSAutomated TestingTechnical ProposalsArchitecture Decision Records

Industry Keywords

SaaS PlatformsEnergyUtilitiesRegulated IndustriesDomain-Driven DesignEvent-Driven Architectures

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDockerSQL

About the role

Key responsibilities & impact

Lead the technical direction and architecture of the team's domain, balancing immediate delivery needs with long-term platform scalability and maintainability
Drive architectural decision-making through design reviews, technical proposals and Architecture Decision Records (ADRs)
Design, build and evolve secure, scalable APIs and shared platform services used by customers, partners and internal engineering teams
Establish and champion authentication and authorisation patterns using OAuth 2.0, OpenID Connect, API Keys and mutual TLS (mTLS)
Remain hands-on in the code, contributing to the design and delivery of critical platform capabilities
Support foundational services for customer onboarding, configuration management and platform extensibility
Raise engineering standards for software quality, testing, observability, security and operational excellence
Partner with Site Reliability Engineering and Developer Experience teams to improve reliability, deployment processes and developer productivity
Collaborate with Product Managers, Engineering Managers and Technical Authors to turn customer and business requirements into clear technical solutions
Mentor engineers across multiple levels and foster a culture of learning, ownership and technical excellence
Lead by example through code reviews, technical coaching and cross-team collaboration
Ensure technical roadmaps align with ENSEK's wider platform strategy
Improve platform security, reliability, integration, delivery performance and operational visibility

Requirements

What you’ll need

Significant commercial software engineering experience, including experience operating as a Senior Engineer, Technical Lead or Staff Engineer
Proven track record of influencing technical direction beyond a single team or product area
Deep expertise designing, building and operating distributed systems and APIs in production environments
Strong experience working with relational databases, particularly SQL Server or similar enterprise-scale database platforms
Strong understanding of API design principles, including RESTful APIs, OpenAPI specifications, API versioning and developer experience considerations
Experience implementing modern identity and access management standards, including OAuth 2.0, OpenID Connect and related authentication mechanisms
Hands-on experience building and operating cloud-native services on AWS
Strong knowledge of containers and orchestration technologies, including Docker, ECS and/or EKS
Experience with AWS services such as API Gateway, IAM and cloud-native security patterns
Strong experience with Infrastructure as Code, automated testing strategies and modern CI/CD pipelines
Excellent communication and stakeholder management skills, with the ability to explain technical concepts to both technical and non-technical audiences
Track record of mentoring engineers and raising engineering standards through technical leadership
Nice to have: Experience working within multi-tenant SaaS platforms
Nice to have: Experience in Energy, Utilities or other highly regulated industries
Nice to have: Familiarity with Domain-Driven Design (DDD) and event-driven architectures
Nice to have: Experience building developer platforms or internal engineering tooling
Nice to have: Exposure to platform security, identity management or customer onboarding systems at scale

Benefits

Comp & perks

25 days’ holiday + bank holidays
Option to buy or sell 5 extra annual leave days per year
Vitality Health Insurance, including private healthcare, virtual GP access, mental‑health support and wellbeing perks (50% off gym memberships -Virgin Active, Nuffield, PureGym)
Pension with 5% matched contribution
Regular team‑wide and company‑wide events
2 volunteering days per year to give back
Remote‑first working environment with offices in London and Nottingham