# Antonio Jelić **Tech Lead & Senior Go Engineer.** Go backends for energy, payments and games. - Works US and EU hours, East Coast to Pacific - Based in Slovenia - Availability: Available for full-time work (remote, B2B) - Engagement: Remote, B2B via Vedia s.p. - Email: antonio@jelic.si - Website: https://antonio.jelic.si - LinkedIn: https://www.linkedin.com/in/antonio-jelic-38204a191 - GitHub: https://github.com/vediatoni ## Summary Tech lead and Go engineer with 8+ years in backend, cloud and DevOps. I work on platforms that have grown complicated and make them simpler, cheaper and more reliable: most recently a battery storage telemetry platform that now runs at 99.8% uptime with ~30% lower cost. Strong in Go, GCP, Temporal, Kafka, MQTT and TimescaleDB; comfortable leading distributed teams across EU and US time zones. ## Selected results - **99.8%** uptime across a battery storage fleet, 2.6 s device-to-database - **~30%** lower infrastructure cost after a platform rebuild - **12 → 1** repos into one Go monorepo, ~130 → 20 API routes, 40% less code - **5 years** on Bitstarz's real-money casino backend in Go and Temporal - **37M+** telemetry events in 2026, now ~1.2M a day, across web game platforms and browser games - **800k+** PDF reports generated by ReportGen ## Experience ### TAE Power Solutions — Tech Lead, Data Acquisition 2025-03 to present (1 yr 9 mos) · Battery 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 Jan 2026. - 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 platform assessment and the 2026 plan; tied team KPIs 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. - Leading the data quality layer, one of the platform's main 2026 deliverables: quality checks on every reading, gap detection and a telemetry completeness KPI. - Moved to 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. Stack: Go, GCP (GKE, Pub/Sub, Cloud SQL, Cloud Run), EMQX/MQTT, TimescaleDB, Terraform, Helm, Bitbucket Pipelines, Rust (edge devices) ### Bitstarz — Senior Software Engineer 2021-12 to present (5 yrs) · Online 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). Stack: Go, Temporal, Kafka, GraphQL, gRPC, Postgres, Redis, Centrifugo, ArgoCD ### Toggl — Senior Software Engineer 2023-11 to 2024-04 (6 mos) · Contract via Vedia s.p. · Remote - Owned the Trips feature of Toggl Work end to end, working with product, frontend and the CEO. Stack: Go, Postgres, Redis, GCP Pub/Sub ### Callidus Grupa — DevOps Engineer 2021-01 to 2022-03 (1 yr 3 mos) · 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. Stack: Kubernetes, Ansible, ArgoCD, Argo Workflows, Postgres (Patroni), Vault, Prometheus, Grafana ### Earlier - Freelance developer, 2018 to 2021. Web apps, integrations and automation. - Junior System Administrator, Adacta Group, 2017 to 2018. ## Own products ### Vedia Games — Founder 2018-06 to present (8 yrs 6 mos) · Live - 12+ browser games with 2M+ game plays across GameDistribution, CrazyGames, Yandex, Y8 and Kongregate. - Run web game platforms with 1,500+ submitted games and 100k+ page views a day: developer console, automatic quality checks, payments. - Built the telemetry pipeline (37M+ events in 2026, now ~1.2M a day) and Grafana dashboards for retention and funnels. Stack: Phaser, PlayCanvas, three.js, TypeScript, SvelteKit, Go, Postgres (PlanetScale), Railway, Cloudflare (R2, Workers, Durable Objects) Links: https://vedia.games, https://studio.vedia.games ### ReportGen — Founder 2024-09 to 2026-11 (2 yrs 3 mos) · Shut down 2026 - Built and ran an HTML-to-PDF API: template engines, headless Chrome rendering, async jobs, webhooks, billing. 800k+ reports generated. - Shut it down in 2026 and published a build-your-own guide. Stack: TypeScript, Next.js, Go, Temporal, Postgres, Redis, Stripe, Railway (migrated from Hetzner), Cloudflare (CDN, R2) Links: https://reportgen.io/blog ## How I work - **Full time, remote, B2B.** Available full time. Contract through my company, Vedia s.p. - **US and EU hours.** Work daily with US teams on both coasts, East Coast to Pacific. Already lead a team split across the US and Europe. - **Incident response.** Mitigate first, then fix the root cause through normal triage. - **AI-first.** Agents do the routine work, I focus on design and decisions. ## Skills - **Languages:** Go (primary), TypeScript, Rust (reading and debugging), SQL - **Cloud and infrastructure:** GCP (GKE, Pub/Sub, Cloud SQL, Cloud Run, Cloud Storage), Kubernetes, Terraform, Helm, ArgoCD, Ansible, Railway, Cloudflare (R2, Workers) - **Data and messaging:** Temporal, Kafka, MQTT/EMQX, TimescaleDB, Postgres, Redis - **APIs:** gRPC, GraphQL, REST - **Practices:** Technical leadership, System design, Incident response, CI/CD, Integration testing, AI-assisted development ## Education - Computer Science, ŠC Kranj Technical High School - Organization and Management of Information Systems (coursework), University of Maribor (2020 to 2021) ## Languages - English (Fluent) - Slovenian (Native) - Croatian (Working) --- Machine-readable versions: https://antonio.jelic.si/resume.json (JSON Resume), https://antonio.jelic.si/llms.txt. Updated 2026-11.