Sperring Software Consulting
Fractional & Portfolio CTOUK & US B2B SaaSHands-on + Strategic

Unblock delivery. Align strategy. Ship value sooner.

I help high‑ambition B2B SaaS teams cut complexity, modernize responsibly, and scale their product without burning out the people who build it. Specializing in fractional CTO services, tech strategy, and constraint-informed delivery.

Fractional CTOPortfolio CTOTech StrategySystems ThinkingTheory of ConstraintsTeam TopologiesDomain-Driven DesignDevExModernizationData & Integrations
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Constraint‑Informed Delivery

Blend Theory of Constraints, systems thinking, and solid engineering to remove the one thing slowing everything else.

Enterprise & Corporate
Manufacturing & Construction
Security & Compliance
Technology & Software
Financial & Established Orgs

Selected orgs and domains I've supported or operated in.

-80%
Lead time
from idea to production
+3-10x
Deploy frequency
per team
-50%
Ops toil
incidents & handoffs
+$10k+
Release savings
per release (historical)

Key outcomes I've helped teams achieve.

Fractional CTO Services

Hands-on leadership paired with pragmatic engineering. No theatre. No cargo cults. Comprehensive tech strategy and modernization services for B2B SaaS companies.

Operating model & org design

Clarify ownership, flow, and interfaces. Make teams autonomous without going feral.

Architecture & modernization

Pragmatic rewrites, modular monoliths, and evolutionary architectures that ship now and scale later.

Platform & delivery

From CI/CD to observability. Cut cycle time, reduce risk, and raise deployment frequency.

Integrations & data

APIs, partner ecosystems, and data flows that unlock revenue.

Hiring & leadership

Right-size the team, uplevel leaders, and build a culture that compounds.

Execution & governance

Lightweight guardrails, strong product/engineering handshake, clear prioritization.

ReactNestJSNodeTypeScriptPostgres/PostGISCQRSAzureCI/CDC#/.NetSQL

Approach

A short, sharp start to build momentum—then right‑sized leadership to keep compounding.

Triage (1–2 hours)

Rapid read on constraints, risks, and opportunities. Align on outcomes and non‑goals. Decide if an Audit Sprint is warranted.

Audit Sprint (2–3 weeks)

Deep dive across product, platform, and people. Produce a crisp plan: decisions, sequencing, owners, and first 90‑day moves.

Lead & Enable (ongoing)

Fractional/Portfolio CTO, advisory retainer, or interim coverage. The aim is to make myself progressively less necessary.

Selected Work

Outcomes across agency, product, and platform contexts.

Piña Vida (Agency)

CTO

Turned multi-day, risky releases into multiple automated deploys per week. Renewed Cyber Essentials. Led UK & SA teams.

Release accelerationTeam leadershipGovernance

Nicer Group

Fractional CTO → Advisor

Guided EJS → Next.js migration and container-based architecture. Transitioned to exec advisor once the team was self-sufficient.

ModernizationPlatformCoaching

Drive eSource (Fleet SaaS)

Co‑founder & CTO

Designed procurement flows connecting FMCs and dealers. Built modular monolith (NestJS + React) and data integrations.

GreenfieldB2B SaaSIntegrations

Engagement Models

Simple, outcome‑oriented options. Pricing on request—flat monthly with clear scope.

Audit Sprint

2–3 weeks

  • Exec interviews & system review
  • Key risks & decisions
  • 90‑day plan & metrics

Fractional CTO

1–3 days/week

  • Hands‑on leadership
  • Outcome governance
  • Coach your leaders

Advisory Retainer

Async + office hours

  • Decision sparring
  • Hiring & vendor review
  • Board‑ready updates

Interim CTO

Full‑time, short term

  • Stabilize & transition
  • Crisis/turnaround support
  • Exec & board alignment
James Sperring - Fractional CTO and Tech Strategy Consultant

About James Sperring

I'm a people‑focused technologist who helps B2B SaaS companies turn complexity into momentum. I've led UK and international teams, modernized legacy stacks, and built new B2B products from zero. I combine Theory of Constraints, Team Topologies, and pragmatic engineering to create systems that ship. As a fractional CTO, I specialize in constraint-informed delivery and tech strategy for high-growth companies.

  • Built modular monoliths that scale
  • Cut release risk & cost dramatically
  • Coached leaders to self‑sufficiency
  • Aligned execs on outcomes, not output

Specialties

Throughput vs valueConstraint mappingProduct/eng alignmentSensible governanceIntegrationsData flows
Based in the UK. Comfortable with US time zones and travel.

FAQ

What’s the difference between Fractional CTO and Portfolio CTO?

Fractional = embedded leadership 1–3 days/week. Portfolio = hands-on leadership across multiple companies with more advisory/enablement. We’ll pick what fits your risk, budget, and tempo.

How quickly can we start?

Discovery call → 1–2 hour triage → optional 2–3 week Audit Sprint. If urgent, I can step in as Interim CTO while we stabilize.

Where do you add the most value?

Ambitious teams with complexity: aligning execs on outcomes, simplifying architecture, and unblocking throughput without burning the team.

Do you replace my engineers or agency?

Usually no. I make them faster and happier by reducing friction and clarifying ownership. If hiring is needed, I’ll help scope and interview.

Ready to turn complexity into momentum?

Let’s triage your constraints and map the first 90 days.

Book via Calendly Get one‑pager Use the contact form below

Signals you’ll benefit

  • Frequent “engineering bottleneck” complaints
  • Slow releases despite busy teams
  • Architecture debates stalling delivery

Contact

Tell me about your context. I'll reply with triage slots.

[email protected]
LinkedIn
On request after intro call