{"id":2692851,"url":"https://alion.io/job/semble-senior-fullstack-software-engineer-ecosystem-experience","title":"Senior Fullstack Software Engineer - Ecosystem Experience","company":{"id":172425,"name":"Semble","domain":"semble.io","url":"https://alion.io/company/semble","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":70000,"max":90000,"currency":"GBP","period":"year","gross":null,"usd_annual":119308},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Datadog","optional":false},{"name":"GraphQL","optional":false},{"name":"Least Privilege","optional":false},{"name":"Node JS","optional":false},{"name":"Playwright","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"Windows","optional":false},{"name":"Yarn","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-01T00:00:00Z","employer_posted_date":"2026-09-01","last_verified_at":"2026-10-17T09:06:29Z","board_verified":true,"closed_at":null,"days_open":46,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":46},"description":"Senior Fullstack Software Engineer - Ecosystem Experience\nAt Semble, we are on a mission to enable health professionals to amplify their impact. We improve the way healthcare is delivered to millions of people by providing doctors and their teams with powerful, innovative, intuitive, and secure software.\nOur cloud-based clinical system is already used by thousands of clinicians, making their lives easier and saving them money, while structuring their health data to help research.\nYou’ll join our Ecosystem Experience team- the group that connects Semble to the wider healthcare ecosystem: labs, pharmacies, partner APIs, webhooks, and Semble Connect, our automation platform built on Workato.\nWe work closely with Product, Business, and external partners, and we ship in a large TypeScript monorepo used across the company.\nWe are a passionate and driven team, proud to unite under strong cultural drivers:\nImpact- We do work that matters.\nCollaboration- We are in it together.\nHuman touch- We care deeply\nWe are also quick to embrace new technologies: we have rapidly adopted AI internally, and we are always looking to work with people who are excited to augment their work with AI.\nThis role can be fully remote in the UK and EU, with occasional travel to our London or Paris offices, within +/- 2 hours of the GMT time zone. We are unfortunately not able to consider candidates located outside these locations and time zones at this stage.\nWhat You Will Be Doing\nAs a senior engineer on Ecosystem Experience, you’ll own problems end to end - from partner discovery through design, implementation, rollout, and production reliability.\nWe expect you to operate with a high degree of autonomy and to raise the technical bar for the team.\nLead the design and delivery of integrations that move clinical and operational data safely between Semble and external systems, including REST/GraphQL APIs, webhooks, HL7, SFTP, and iPaaS/automation flows.\nWork across the stack in our Yarn/Nx TypeScript monorepo: React on the frontend, Node.js services and domain modules on the backend, GraphQL (internal and public APIs), and MongoDB.\nTake ambiguous partner specs and product goals and turn them into clear technical designs, sequenced delivery plans, and clinically safe, testable solutions.\nMake sound architectural trade-offs - simplicity vs flexibility, build vs buy, speed vs long-term maintainability - and document the decisions so others can follow them.\nOwn production outcomes: monitoring and alerting (e.g. Datadog), incident diagnosis, root-cause analysis, and durable fixes - not just shipping features.\nImprove reliability and operability: failure handling, retries, idempotency, credentials/secrets, multi-tenant config, and safe rollouts across many production environments.\nContribute to Semble Connectand related automation - provisioning, connections, recipe/webhook patterns, and the product surfaces that expose them to practices.\nSet a high quality bar through design reviews, thorough code reviews, automated tests (unit, integration, e2e), and pragmatic CI/CD improvements.\nMentor and unstick teammates; give clear feedback; help more junior engineers grow without becoming a bottleneck.\nInfluence the Ecosystem Experience roadmap and technical standards - surfacing risks early, proposing better approaches, and aligning stakeholders when requirements conflict.\nWhat We Are Looking For\nWe’re looking for a senior fullstack engineerwho enjoys messy real-world integrations as much as clean product UI - someone comfortable reading a partner OpenAPI spec in the morning and shipping a resilient production path by the afternoon.\nYou should already be operating at a senior level: driving work independently, elevating those around you, and thinking beyond the ticket in front of you.\nMust-Haves\n5+ years' professional experiencebuilding production web applications with React and TypeScript, including substantial time operating as a senior / staff-of-one on complex features.\nStrong hands-on experience with Node.js backends and APIs(REST and/or GraphQL).\nProven experience integrating with third-party systems- APIs, webhooks, auth flows, retries, idempotency, credentials/secrets.\nAbility to design systems, not just implement tickets: break down large problems, define interfaces/contracts, and leave codebases easier to change than you found them.\nComfort working in ambiguity - clarifying requirements, challenging weak specs, and driving decisions when information is incomplete.\nA production ownership mindset: debugging complex issues across services, reading logs/metrics traces, and preventing the same incident twice.\nSolid automated testing habits (unit/integration/e2e) and comfort with CI/CD; you know when to add coverage and when not to over-engineer.\nExperience with NoSQL databases(MongoDB or similar) and cloud-hosted applications (AWS preferred).\nStrong written and verbal communication - RFCs/tech notes, partner discussions, and clear updates for Product and other engineers.\nCollaborative leadership without needing formal authority: mentoring, reviewing thoughtfully, and aligning people around a plan.\nSecurity and privacy awareness appropriate for handling sensitive healthcare data - least privilege, secrets hygiene, safe logging.\nComfort using AI coding toolsto accelerate delivery without lowering the quality bar.\nStrong Pluses\nHealthcare, HL7/FHIR, lab/pharmacy, or other regulated-domain integrations.\niPaaS / automation platforms(Workato or similar).\nDesign systems / component libraries, and large monorepo experience.\nInfrastructure as Code(Terraform / CDK), observability (Datadog or similar), and multi-tenant SaaS.\nExperience leading technical delivery across multiple engineers or workstreams.\nPlaywright or Cypresse2e experience.\nBilingual English-French.\nWhat You’ll Get in Return\nThe great feeling coming with knowing you do something that matters: improving healthcare!\n£70,000-90,000 package, based on your experience and the value you can bring.\nAutonomy and ownership- we’ll set the vision and share the context, then we trust you to run with things - that’s the reason we hire you!\n36 days off:25 holidays + bank holidays + 3 extra days (birthday and ‘feel good’ days) - that we will expect you to actually take so you can recharge and rest.\nComprehensive health & wellbeing support- including private health insurance, and mental health support and free therapy sessions through Oliva.\nHybrid & flexible work environment- work from anywhere in the UK, with also some flexibility to work across Europe. You decide how much or how little you go to the office.\nGet the tech you need- You will get the latest MacBook (unless you prefer Windows) and take your pick across a wide range of equipment to setup your home office ergonomically.\nWork alongside an inspiring team- our two founders have started Semble after a successful startup exit, and your future colleagues are all knowledgeable and innovators in their field.\nFantastic office space in Central London, right outside Monument - with a roof terrace, weekly activities, loads of natural light, and cute doggies!\nThe usual free bits coming with nice offices - barista coffee, tea, fruits, happy hours and activities...","description_format":"text","description_chars":7243,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"French","level":"Proficiency (C2)","optional":false},{"language":"English","level":"Proficiency (C2)","optional":false}]},"benefits":["Apple Macbook","Flexible schedule","Health insurance","Home office"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Practice Management Software"],"lifecycle":[{"event":"open","at":"2026-10-16T09:31:14Z"}],"visa":[],"liveness":{"score":20,"band":"cold","label":"Long shot","p_open":1,"p_active":0.455,"p_room":0.45,"age_days":46,"expected_fill_days":30,"reasons":["conf:3","win:tail"],"computed_at":"2026-10-17T05:46:00Z"},"pay":{"stated_usd_annual":119308,"is_top_pay":false},"html_url":"https://alion.io/job/semble-senior-fullstack-software-engineer-ecosystem-experience","json_url":"https://alion.io/job/semble-senior-fullstack-software-engineer-ecosystem-experience.json","meta":{"generated_at":"2026-10-17T11:30:08Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":15031,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":172425},"rest":"https://alion.io/mcp/rest/get_company?id=172425"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsemble-senior-fullstack-software-engineer-ecosystem-experience"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fsemble-senior-fullstack-software-engineer-ecosystem-experience"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fsemble-senior-fullstack-software-engineer-ecosystem-experience"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/semble-senior-fullstack-software-engineer-ecosystem-experience\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsemble-senior-fullstack-software-engineer-ecosystem-experience"}]}