Senior Staff Full Stack Engineer - Sell Side

Hitachi Ventures; United Kingdom; Remote; GBP 120,000 - 160,000; Full time

Job summary

Hitachi Ventures is seeking a Senior Staff Software Engineer for Origination & New Products. This hands-on leadership role drives deep Rosso integration, pricing capability, and deal-gating risk tooling.

You’ll lead a three-person squad, shaping architecture and technical standards to accelerate origination and enable international expansion. You will partner with commercial and product teams to ensure engineering outcomes feed the overall pipeline.

Qualifications

• Experience leading technical squads and delivering complex software systems.
• Ability to translate ambiguity into concrete engineering plans.
• Strong ownership of end-to-end delivery and technical standards.

Responsibilities

• Lead technically through execution: design, build, and ship features with the Origination & New Products squad.
• Set technical direction and raise standards across Sell squads.
• Turn commercial goals into engineered outcomes and measurable pipelines.
• Collaborate with commercial and product stakeholders to keep work aligned with origination targets.
• Mentor engineers and contribute to engineering practices that outlast the squad.

Skills

Technical leadership

System design

Hands-on coding

Mentoring

Cross-team collaboration

Tools

Rosso integration

Job description

Who We Are:

We are rebuilding the energy transaction, making it transparent and fair.

We're rebuilding how energy is bought and sold. That means cutting out middlemen, connecting businesses directly with renewable generators, and ensuring every transaction is traceable and transparent.

We're a 160+ person team - operators, data scientists, engineers, customer champions and energy experts - backed by top-tier investors including Lightspeed Venture Partners, Hitachi Ventures, Allianz, AlbionVC and Atomico. We closed a $75M Series B round in early 2026, taking our total funding to $94M, and we now power energy for over 4,000 UK businesses across 8,500+ sites, with over £75m in value returned to businesses and generators so far.

We're a technology company solving the energy industry, not an energy company. Some people call us a neo-utility, the neo-bank idea, applied to energy.

The industry is noticing. We were crowned Europe's Most Exciting Tech Company at the GP Bullhound Allstars awards, came in at #6 on LinkedIn's Top Startups 2026 in the UK, #7 on the Scaling Europe 50 of Europe's fastest-growing companies, and #14 on Sifted's AI 100.

Learn more about us on our website.

The Role:

We're hiring a Senior Staff Software Engineer for Origination & New Products.

This is a hands-on technical leadership role, not a people-management one. You'll lead the Origination & New Products squad through ambiguous, no-precedent build work - deep Rosso integration, pricing capability, and deal-gating risk tooling. You won't own hiring, performance, or comp for anyone in the squad; you'll lead through technical direction, judgement, and execution.

Your squad is where you'll do the work, but it's not where your impact stops. You're accountable for outcomes that reach across the Sell team - other squads working against the same origination targets, the Engineering Manager's roadmap, and the broader engineering culture at tem. Success here looks like other squads building faster because of patterns and standards you set, not just your own squad shipping on time.

Beyond the squad, you'll be a strategic partner to the Engineering Manager, turning company-level targets into engineering outcomes - starting with growing origination volume through new products over the first 12 months, and later supporting the team as Sell Side expands internationally.

You will lead a new three person squad to help you deliver your goals.

You will:

• Own the delivery for new product categories
• Lead technically through execution - design, build, and ship alongside the squad, not just direct it.
• Translate ambiguous, commercially-driven problems into a shape the squad can deliver against.
• Partner with commercial and product stakeholders to keep new-product work tied to real pipeline outcomes.
• Mentor the squad's engineers and raise technical standards, without owning their performance or career progression.
• Set technical direction and standards that other squads in Sell adopt - your influence is measured beyond your own team's delivery.

You will report into the Engineering Manager, Sell Side.

Responsibilities:

Lead through execution

• Drive the Origination & New Products squad's technical direction on deep integrations with other internal services
• Stay hands-on: design, build, and review the hardest parts of the new-product build sequence yourself.
• Take a company target ("grow origination volume through new products") and break it into a sequenced, deliverable plan without needing to be told how.

Build for ambiguity and risk

• Design systems for categories that don't exist yet at tem - Unlocking TWh’s of new pipeline - where the spec is being written as you go.
• Make judgement calls on commercial risk in deal-gating tooling, not just deliver what's asked.
• Prevent domain drift as new product categories are added, keeping shared language and clear boundaries.

Partner beyond the squad

• Work directly with the Engineering Manager and commercial stakeholders to keep new-product delivery tied to origination pipeline outcomes, not just shipped features.
• Be a reference point for other squads across Sell facing similar Rosso integration, pricing, or risk-tooling problems - your judgement should raise the bar beyond your own team.
• Contribute to engineering standards and practice that outlast this squad - patterns, conventions, and technical decisions other engineers in Sell (and beyond) will build on