Full Stack Software Engineer

BESS Site Manager required to work for a UK EPC subcontractor on a large 45MW+ BESS project based in Ipswich. Applicants MUST have BESS (battery energy storage systems) experience with a good understanding of BESS installations. This is for a 3 month renewable contract, based fully onsite. Applicants must be eligible to live and work in the UK.ersg are an equal opportunities employer; we are committed to promoting equality of opportunity for all job applicants. We do not discriminate against applicants on the basis of age, sex, race, disability, pregnancy, marital status, sexual orientation, gender reassignment or religious background; all decisions are based on merit.

Test Engineer - SaaS (Web/Mobile) on Azure Location: Kristiansand or StavangerOne year ContractRole Test engineer responsible for validating quality, reliability, and security of commercial SaaS applications (web and mobile on iOS/Android) hosted on Azure. You'll work closely with developers, product owners, and domain experts to do hands-on testing and ensure features ship with confidence. Responsibilities Define and execute test plans for new features, regressions, and releases.Perform functional, integration, and end-to-end testing across web and mobile apps.Track, reproduce, and clearly document defects; drive issues to resolution with the team.Support non-functional testing: performance, reliability, and basic security validation.Participate in reviews (requirements, user stories, acceptance criteria) to improve testability.Contribute to test documentation (test cases, checklists, release readiness notes). Qualifications5+ years (or equivalent) testing production software in agile teams.Experience testing commercial web applications and/or mobile apps (iOS/Android).Familiar with Azure-based systems and environments (deployments, logs, monitoring).Detail-oriented communicator who can collaborate across technical and non-technical roles.Good SQL skills and confidence working with data-heavy systems.Hands-on test automation experience, API testing tools. Nice to have Experience with SAST/DAST outputs and verification of fixes (or security-minded testing).Performance testing experience (e.g., JMeter/k6) and observability tooling.Domain familiarity: drilling & wells, WITSML, Cognite/CDF, and/or OSDU.ersg are an equal opportunities employer; we are committed to promoting equality of opportunity for all job applicants. We do not discriminate against applicants on the basis of age, sex, race, disability, pregnancy, marital status, sexual orientation, gender reassignment or religious background; all decisions are based on merit.

A UK-based leading renewable energy contractor is seeking experienced Electricians to support utility-scale solar project based in Gloucestershire. The role will involve DC testing on 1500V string inverter systems. Candidates must be qualified Electricians with previous experience testing DC systems. This is a fully onsite position. The client has a strong pipeline of projects to follow nearby. Candidates must be eligible to live and work in the UK.ersg are an equal opportunities employer; we are committed to promoting equality of opportunity for all job applicants. We do not discriminate against applicants on the basis of age, sex, race, disability, pregnancy, marital status, sexual orientation, gender reassignment or religious background; all decisions are based on merit.