Antonio Jelić

Tech Lead, Data AcquisitionBattery energy storage systems (BESS)

Contract through TAE Power Europe, via Vedia s.p. · Remote, working mostly with the US team
Joined as Senior Backend Engineer, Tech Lead since 2026-01.

• Lead a team of 6 engineers and a project manager across the EU and US, owning the end-to-end telemetry platform for battery energy storage systems (BESS): edge gateway, ingestion, historian, data quality and observability.
• Wrote the framework assessment that set the platform's 2026 direction: benchmarked our stack against industrial SCADA historians (ABB, Siemens, AVEVA) and decided what to reuse, rewrite and replace. Turned it into the 2026 milestone plan, with team KPIs mapped to company KPIs.
• Represented software engineering in the company's ISO 9001 recertification audit.
• Led the rebuild of the cloud platform: 12 repos into one Go monorepo, ~10 services down to 3–4, ~130 API routes down to 20, 40% less code while adding features.
• Designed the ingestion path: devices → EMQX (MQTT over mTLS) → Pub/Sub → Go ingestion → TimescaleDB, with GCS fallback, dead-letter queue and replay tools.
• Leading the data quality layer, one of the platform's main 2026 deliverables: every reading is classified as good, suspect or stale on ingestion, a background worker detects gaps and silent devices or bridges, and a version-controlled registry of expected readings drives a telemetry completeness KPI.
• Replaced self-hosted ActiveMQ, HAProxy and TimescaleDB on GKE with managed services, cutting infrastructure cost by ~30%.
• The platform runs the whole fleet at 99.8% uptime and 2.6 s end-to-end latency; designed for 50 systems and ~3.6B rows a day.

• Go
• GCP (GKE, Pub/Sub, Cloud SQL, Cloud Run)
• EMQX/MQTT
• TimescaleDB
• Terraform
• Helm
• Bitbucket Pipelines
• Rust (edge devices)

Senior Software EngineerOnline casino

Contract via Vedia s.p. · Remote

• Backend engineer on a Go platform of ~63 modules for an online casino.
• Built cashout status tracking on Temporal, fed by the payment vendor's Kafka stream and reconciled against its database, so players always see the true state of their withdrawal.
• Lead engineer on a Temporal-based rewrite of a jackpot reward product.
• Integrated game providers (Platipus, BGaming and more) and built the data behind the casino lobby.
• Wrote the team's internal CLI, a YAML-to-Go config generator, shared error libraries and the integration-test harness (real Postgres, Redis and Kafka in containers).

• Go
• Temporal
• Kafka
• GraphQL
• gRPC
• Postgres
• Redis
• Centrifugo
• ArgoCD

Senior Software Engineer

Contract via Vedia s.p. · Remote

• Owned the Trips feature of Toggl Work end to end, working with product, frontend and the CEO.

• Go
• Postgres
• Redis
• GCP Pub/Sub

DevOps Engineer

Kranj, Slovenia

• Sole DevOps engineer for an IoT device management platform: Kubernetes (HA, kubeadm + Ansible), ArgoCD and Argo Workflows, HA Postgres with Patroni, Vault, Prometheus and Grafana.

• Kubernetes
• Ansible
• ArgoCD
• Argo Workflows
• Postgres (Patroni)
• Vault
• Prometheus
• Grafana